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47 results about "Sequence stratigraphy" patented technology
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Sequence stratigraphy is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of scales and explain these stratigraphic units in terms of variations in sediment supply and variations in the rate of change in accommodation space (relative sea level, the combination of eustatic sea level and tectonic subsidence). The essence of the method is mapping of strata based on identification of surfaces which are assumed to represent time lines (e.g. subaerial unconformities, maximum flooding surfaces), and therefore placing stratigraphy in chronostratigraphic framework. Sequence stratigraphy is a useful alternative to a lithostratigraphic approach, which emphasizes similarity of the lithology of rock units rather than time significance.
Multiple-stratum-series tight sandstone gas reservoir well spacing method
InactiveCN104453836AReduce outputWell layout method is reasonableFluid removalHorizontal distributionSoil science
The invention discloses a multiple-stratum-series tight sandstone gas reservoir well spacing method. The method includes the following steps that first, based on high-resolution sequence stratigraphy, distribution of sand bodies is depicted, an effective reservoir stratum is predicted through the earthquake and well logging technology, and an enrichment region is preferentially selected; second, based on a favorable region, a longitudinal structure of the sand bodies is fine dissected through the geology and well logging technology, and therefore the horizontal distribution law of the sand bodies can be researched; third, in the preferential favorable region, well spacing is performed according to conditions. The well spacing method is reasonable and takes the complex geology that multiple gas-bearing series longitudinally develop in an upper palaeozoic tight sandstone gas reservoir, the single layer yield is low and the lateral variety of the reservoir stratum is fast into consideration, the drilling success of a development well can be guaranteed, the development effect can be improved to the maximum extent, and the economical and effective development of the tight sandstone gas reservoir is achieved.
Owner:中国石油天然气股份有限公司长庆油田分公司勘探开发研究院
Method and device for determining sedimentary stratum ancient landform
The invention provides a method and device for determining a sedimentary stratum ancient landform. The method comprises the steps that objective horizon obtained in advance is divided according to the third-order sequence division mode in the sequence stratigraphy theory, and a sequence stratigraphic framework of the objective horizon is built to determine the studying sequence; the horizon, in accordance with the preset requirements, in the studying sequence is selected as restoring horizon; the thickness of the restoring horizon is obtained according to the top boundary and the bottom boundary of the restoring horizon; decompaction treatment is performed on the thickness of the restoring horizon to determine the original sedimentary thickness; the sedimentary stratum ancient landform is determined according to the mirror-image relationship between the original sedimentary thickness and the ancient landform. According to the method and device for determining the sedimentary stratum ancient landform, the condition that a denudation phenomenon may exist in the objective horizon is considered, the sequence stratigraphic division is performed on the objective horizon, a selection method of the restoring horizon is discussed under the constraint of the sequence stratigraphy theory to obtain the accurate stratum thickness used for ancient landform restoring, and therefore the accuracy of ancient landform restoring is improved.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Method for predicting plane distribution law of effective natural fissures of oil reservoir
ActiveCN103324770AAccurately reflectSolve the phenomenon that the predicted fracture density distribution is too largeSpecial data processing applicationsSoil scienceFinite element method
The invention discloses a method for predicting the plane distribution law of the effective natural fissures of an oil reservoir and belongs to the field of natural fissure research. The method comprises the following steps: according to the conventional fissure recognition and description technologies, preliminarily determining the characteristic parameters of the natural fissures of the ultra-permeability dense oil reservoir; acquiring the preliminary distribution law of the natural fissures according to the finite element method; according to the characteristic parameters and the preliminary distribution law, building a reservoir-bed fissure geologic model; according to the sequence stratigraphy and the phase-controlled modeling technology, building a reservoir bed matrix geologic model; according to development conditions of the natural fissures in different matrixes, combining the reservoir bed fissure geologic model and the reservoir bed matrix geologic model and building a preliminary reservoir bed geologic model taking the natural fissures into consideration; on the basis of the preliminary reservoir bed geologic model taking the natural fissures into consideration, acquiring the plane distribution law of the effective natural fissures by adjusting the characteristic parameters to be fitted with production data. The method provides a reliable basis for optimizing a development technology policy.
Owner:PETROCHINA CO LTD
Method for exquisitely depicting and predicting edge structures of carbonate platforms
InactiveCN109597126AImprove analysis accuracyOptimize platform evolution modelSeismic signal processingOutcropLandform
The invention provides a method for exquisitely depicting and predicting edge structures of carbonate platforms. The method comprises the steps of: establishing a high-resolution sequence stratigraphic framework through well-seismic combination; recovering an ancient landform according to a stratum residual thickness map and determining a development position of a platform edge; exquisitely dissecting the platform edge by utilizing seismic data, establishing development modes of different platform edge zones at different periods, and analyzing a development issue and a superposition style of areef flat body; determining plane distribution characteristics of the platform edge and development issue and scale of the reef flat body therein, and delimiting a beneficial reef flat development zone of the platform edge zone; and forwardly modeling the growth of a platform by using geological software, and optimizing a prediction result. The method for exquisitely depicting and predicting edgestructures of carbonate platforms is mainly based on a sedimentology theory and a sequence stratum theory, and is capable of carrying out exquisite dissection on platform edge structures and predicting distribution positions beneficial for reef flat bodies by sufficiently utilizing outcrop, seismic and drilling data, thereby improving the exquisite degree of platform structure depiction.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Oil reservoir division and comparison method based on high resolution sequence stratigraphy
The invention discloses an oil reservoir division and comparison method based on high resolution sequence stratigraphy. The oil reservoir division and comparison method comprises the steps of: identifying medium-term base level cycles based on rock cores, drilling / logging seismic data, high resolution sequence stratigraphy, base level cycles and an admissible space change principle, by means of the change trend of an A / S value; dividing and comparing oil groups by interfaces and flooding surfaces of the identified medium-term base level cycles; based on the drilling / logging seismic data, the flooding surface and conversion surface of the change of a reference surface, identifying short-term base level cycles, and dividing and comparing sand groups; according to the identified superposed modes of short-term base level cycles, establishing an isochronous stratigraphic framework by means of comparison; and according to the stratigraphic framework, controlling division and comparison small layers under the control of the cycle and stratum superposed modes. The oil groups, the sand groups and the small layers are included in an oil reservoir division and comparison unit. According to the invention, the oil reservoir division and comparison method solves the problem in the prior art that a diachronous phenomenon usually occurs in the comparison process.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Subsurface Directional Equalization Analysis of Rock Bodies
A subsurface directional analysis determines an image-based three-dimensional analysis meta-model with unbiased vectors and tensor relations among rock bodies or complex objects in the directional subsurface environment. An analytical tool is applied to sequence stratigraphy for characterization of geological heterogeneity of developed hydrocarbon reservoirs, aquifers and sequences of rocks.
Owner:SAUDI ARABIAN OIL CO
Identification method of sedimentary microfacies mode of carbonate rock high-frequency sequence framework
InactiveCN110275210ASolve the problem that the sequence interface cannot be identified in the whole well sectionElectric/magnetic detection for well-loggingAcoustic wave reradiationPorosityLithology
The invention provides an identification method of a sedimentary microfacies mode of a carbonate rock high-frequency sequence framework. The method includes the following steps: determining a lithologic sensitive well logging curve by using a layer rock core sample of carbonate rock and a conventional well logging curve; determining a three-porosity well logging curve combination according to a resistivity well logging curve combination; identifying a low-frequency sequence boundary according to the lithologic sensitive well logging curve, the three-porosity well logging curve combination and the resistivity well logging curve combination; identifying a high-frequency sequence boundary according to the low-frequency sequence boundary; analyzing single well sedimentary subfacies and microfacies division; and completing the comparison and division of sedimentary microfacies of a whole well section. The method has strong operationality, conforms to the principles of sequence stratigraphy and sedimentology, can accurately establish the sedimentary microfacies mode with the high-frequency sequence as constraint with dynamic and static combination of division units, carries out sedimentary evolution analysis, and lays a good foundation for the sedimentary understanding of carbonate gas reservoir, the establishment of reservoir geophysical prediction forward model and the comprehensive evaluation of gas reservoirs.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for compiling paleogeologic map of carbonate rock strata based on sequence stratigraphy
ActiveCN109143361AHigh precisionGuaranteed accuracySeismic signal processingSuperimpositionData information
The invention relates to a method for compiling a paleogeologic map of carbonate rock strata based on the sequence stratigraphy, which comprises the steps of performing division calibration on sequence strata on the basis of basic data information, building carbonate connected well profile sequence stratigraphic framework and spatial sequence stratigraphic framework, analyzing the mutual superimposition relation of different strata on the profile and spatial development characteristics and distribution rules, specifying the mode and sequence structure of rhythmic strata of carbonate rocks, anddelimiting the structural boundary and range; taking a stratum thickness map as a base map, drawing stratum boundaries corresponding to different sequence stratigraphic interfaces according to the stratigraphic superimposition relation from old to new; and then correcting the stratigraphic boundaries according to the special geological phenomenon interpreted by the existing data, supplementing map elements and thus completing the drawing of the paleogeologic map. The method not only can ensure the accuracy of geological information, but also can guide the actual exploration and development more effectively, thus reducing the risk of exploration and development, and reducing the cost input of th exploration and development.
Owner:SOUTHWEST PETROLEUM UNIV
Multiscale digital rock modeling for reservoir simulation
Methods for upscaling digital rock modeling data are described. Core-plug samples for pore-scale modeling are chosen using whole-core mini-permeability grids and conventional CT scans. Pore models or pore-network models are used for flow modeling. Borehole-scale models use MPS (Multi-Point Statistics) to combine mini-permeability grids and conventional CTscans of whole core with electrical borehole images to create 3D numerical pseudocores for each RRT (Reservoir Rock Type). Effective SCAL properties computed from various MPS borehole-scale realizations or models are used to populate interwell-scale models for each RRT. Effective properties computed from flow simulations for interwell volumes are used to populate full-field scale models. At the full-field scale, outcrop analogs, sequence stratigraphy, forward stratigraphic models, diagenetic models, and basin-scale models are combined using MPS to improve flow simulations. At every stage, REVs (representative element volumes) are computed to be certain rock heterogeneities have been captured.
Owner:SCHLUMBERGER TECH CORP
Comprehensive evaluation method for single well oil gas geology
The invention relates to a comprehensive evaluation method for single well petroleum geology. The method comprises the following steps: 1, source rock evaluation; 2, reservoir stratum evaluation; 3, overlying stratum evaluation; 4, entrapment evaluation; 5, oil gas source comparison. According to the comprehensive evaluation method for the single well oil gas geology, the sequence stratigraphy theory serves as guidance, systematic observation of rock debris and the core and sample analysis serve as the bases, physical geography materials such as logging are combined, system partitioned strata are compared with adjoining wells, target stratum series sedimentary facies markers, sedimentary facies types and characteristics, stratigraphic sequence characteristics and sedimentary cycles, structures and structural characteristics are researched, sedimentary facies, cored interval sedimentary microfacies and comprehensive logging interval sedimentary microfacies are partitioned, sedimentary environment analysis is conducted, a single well facies model and whole well sedimentary facies sections are established, the mutual relations between the sedimentary facies and a crude stratum, a reservoir stratum and an overlying stratum are defined, and outlining basis is provided for conducting single well oil gas geology basic element analysis.
Owner:SOUTHWEST PETROLEUM UNIV
Mapping series and technical method for construction of continental sequence stratigraphic framework
ActiveCN107153725ALogical thinkingSimple methodDesign optimisation/simulationGeographical information databasesPlane figureSpacetime
The invention provides a map series and technical method for construction of a continental sequence stratigraphic framework. The method includes the specific steps that in the aspect of 'points', drilling data is given priority to, and a single-well analysis map series and a mapping method are determined; in the aspect of 'lines', based on a connecting-well profile and a seismic profile, a map series and mapping method of the 'lines' are determined; based on research results of 'points and lines', according to a plane figure, a map series of 'surfaces' is determined; by means of a three-dimensional data body, through the combination with sequence stratigraphic 'body' research, a map series and mapping method of the 'body' are determined; by means of time data, based on the spatio-temporal evolution of sequence stratigraphy, a map series and technical method of the sequence stratigraphic 'body' are determined, and finally a sequence stratigraphic framework drawing is formed. By means of the method, mapping is started, a standard industrial drawing is formed, the map series and technical method can be directly used for guiding oil and gas exploration, the application effect of research results is improved, exploration risks are avoided, and exploration costs are reduced.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Shale bed sequence stratigraphic division method
InactiveCN107515957ASolve the real problemData processing applicationsDesign optimisation/simulationRock coreOperability
The invention provides a shale bed sequence stratigraphic division method. The shale bed sequence stratigraphic division method comprises the steps of 1, extracting a rock core sample and obtaining element data and fabric features; 2, according to element features, analyzing environmental evolution features including paleoclimate, paleowater depth, paleosalinity and paleoredox; 3, determining parasequence set boundary features according to sequence cycle standards by a sequence stratigraphy principle; 4, establishing corresponding relationships between a natural gamma curve and a parasequence set and between the natural gamma curve and a sequence boundary, and establishing a stratigraphic framework profile; and 5, performing full-region sequence stratigraphic division, drawing a sequence stratigraphic distribution plane graph, and analyzing a sequence stratigraphic distribution law. The shale bed sequence stratigraphic division method solves two difficult problems of sequence boundary identification and full-region sequence stratigraphic fine correlation; and the whole method is high in operability and provides effective technical support for exploration deployment of shale oil and gas.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method used for characterizing small and medium sized extension rift basin growth reverse fault
The invention provides a method used for characterizing a small and medium sized extension rift basin growth reverse fault, which belongs to the technical field of geological prospecting. The method comprises the steps that the data of an area to be identified are collected and processed; sequence division is carried out under the guidance of a sequence stratigraphy theory, and an isochronal sequence stratigraphic framework of the area to be identified is established; under the constraint of the isochronal sequence stratigraphic framework of the area to be identified, construction-stratigraphic linkage interpretation is carried out, and positive and reverse faults are identified and classified; stratigraphic-sedimentary linkage interpretation is carried out on classified positive and reverse faults; a pseudo fault which is mistakenly identified is rejected, and a fault framework of the area to be identified is established; construction-sedimentary linkage interpretation is carried out on positive and reverse faults in the fault framework of the area to be identified; a growth fault construction framework is established, and a growth reverse fault in the framework is determined; a tectonic geologic model of the growth reverse fault and the derivative tectonic geologic model are built; and the cause of the growth reverse fault in each tectonic geologic model is analyzed to guide oil and gas exploration of the area to be identified.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for finely recovering karst topography
PendingCN107167853AIntuitive and realistic image restorationRestoration work completeGeological measurementsTerrainOverburden
The invention discloses a method for finely restoring karst paleogeomorphology in the technical field of paleogeomorphology restoration. The specific steps of the method for finely restoring karst paleogeomorphology are as follows: S1: Find a relatively accurate representative paleosea in the overlying stratum of ancient weathering crust Plane stratigraphic depositional interface; S2: Obtain the relative height of the topography on the weathering crust through the stratum thickness between the depositional interface and the weathering crust; S3: Use the method of high-resolution sequence stratigraphy to calculate the relative height of the topography in step S2 S4: Construct the seismic profile; S5: Analyze the seismic profile features on the seismic profile, and restore the karst ancient landform. The restoration image of the karst ancient landform in the present invention is intuitive and realistic, with low cost and easy Realized that the restoration of ancient landforms is relatively complete, and at the same time, the impact of the later structure of the landforms is considered, and the restoration accuracy is high.
Owner:RES INST OF SHAANXI YANCHANG PETROLEUM GRP
Fine-grained sediment outcrop researching method
InactiveCN107942032APreparing sample for investigationEarth material testingFine grained sedimentsOutcrop
The invention discloses a fine-grained sediment outcrop researching method. The method comprises the following steps: 1) selecting a standard profile; 2) using a sequence stratigraphy principle to determine a stratigraphic framework, and taking standard entity fossil as a basis to establish the age stratigraphic framework; 3) continuously sampling by a system; 4) polishing the sample, describing composition, structure and construction of a black mudstone lamina, 5) developing a characteristic analysis on a reservoir of the black mudstone; and 6) developing rock mechanics and stress sensitivityanalysis of the black mudstone. The fine-grained sediment outcrop researching method uses outcrop data, establishes the stratigraphic framework of the fine-grained sediment, can symptom characteristic of the fine-grained sediment and the rock mechanical property, and provides the basis for evaluating the resource potential of the black mudstone and shale gas exploitation.
Owner:PETROCHINA CO LTD
Exploration method, equipment and system of fault basin lithologic oil-gas reservoir
The invention provides an exploration method, equipment and system of fault basin lithologic oil-gas reservoir, computer equipment and a computer readable storage medium, and relates to the technicalfield of lithologic oil-gas reservoir exploration. The method comprises the steps of dissecting a target zone oil-gas layer of already-developed oil-gas reservoir, and performing division to obtain aplurality of oil-gas reservoir units; determining accumulation mechanism information corresponding to the oil-gas reservoirs according to the oil-gas reservoir units; analyzing the oil-gas reservoir units in a multi-zone way according to the accumulation mechanism information, and determining enrichment mode information of composite oil-gas reservoir; and performing play evaluation according to the accumulation mechanism information and the enrichment mode information, and forecasting an exploration direction of the lithologic oil-gas reservoir. By the method, the technical problem that sequence stratigraphy and conventional reservior prediction technology is not suitable for looking for medium- and small-size lithologic oil-gas reservoir in fault basin during high exploration degree stageis solved, and a foundation is laid for high-efficiency exploration and development of such lithologic oil-gas reservoir.
Owner:PETROCHINA CO LTD
Isochronal interface recovery method in last phase of mid-term deposition cycle of fluvial facies stratum
ActiveCN107247289AHigh precisionThe recognition result is objectiveSeismic signal processingRecovery methodRestoration method
The invention relates to an isochronal interface recovery method in the last phase of mid-term deposition cycle of the fluvial facies stratum. The method comprises the following steps that 1) an undercutting sign is identified, and an undercutting position of a post river is determined; 2) the undercutting depth of the post river is obtained; and 3) an isochronal stratum interface in last phase of mid-term deposition cycle is recovered. According to the invention, the undercutting position of the post river is identified according to logging and earthquake integrated response and sand body growth characteristics by taking a reference surface cycle theory in high-resolution sequence stratigraphy as guidance, an identification result is objective and reasonable, and and the multiplicity of solutions is reduced.
Owner:CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
Quantitative evaluation method for quantity of potential resources around developed oil field
ActiveCN112034513APromote exploration and developmentClimate change adaptationSeismic signal processingOil fieldMultiple factor analysis
The invention relates to a quantitative evaluation method for the quantity of potential resources around a developed oil field, wherein the method comprises the following steps: a, analyzing the development rule of a reservoir around the developed oil field based on a high-resolution sequence stratigraphy evolution rule, and locking a favorable reservoir development position; b, searching for a seismic reflection interface corresponding to a medium-term cycle reference surface adjacent to the favorable reservoir development position depth, carrying out horizon interpretation, searching for potential sand bodies, and numbering the potential sand bodies; c, carrying out multi-factor analysis on the potential sand bodies, evaluating each potential sand body, and defining a potential reserve unit; and d, determining reserve calculation parameters of the potential reserve unit, and calculating the reserve of the potential sand bodies. The method can be widely applied to potential sand bodyreserve calculation of developed surrounding oil fields of offshore oil fields, and further exploration and development of the offshore oil fields are facilitated.
Owner:CNOOC TIANJIN BRANCH +1
Method for dividing stratum structures of mining area
InactiveCN102681015BReasonable divisionAvoid time lapseSurveySeismology for water-loggingPetrologySequence stratigraphy
The invention relates to the field of geological exploration, in particular to a method for dividing stratum structures of a mining area. The method comprises the following steps of drilling multiple wells in the mining area, extracting a core sample from each well and acquiring a logging curve; dividing the mining area into multiple subareas according to a geological structure and depositional setting; analyzing the extracted core samples and the logging curve according to sequence cycle standard in a sequence stratigraphy principle, classifying the stratum structures of the wells from which the core samples are extracted, and determining a marker bed and a boundary mark among the marker beds; determining a standard well in each subarea, and adopting the stratum structure of the standard well in each subarea as the stratum structure of the subarea; unifying the stratum structures of all standard wells; and integrating the stratum structure of each subarea, and establishing a stratum structure layout chart of the entire mining area. The core samples are analyzed by utilizing the sequence cycle standard, so that the stratum structures are more reasonable to divide, and the diachronous phenomenon is avoided.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Stratigraphic correlation method and system for petroliferous basin
ActiveCN106324698ASolve strata correlation problemsAvoid prospecting mistakesGeological measurementsLithologyComputer science
The invention discloses a stratigraphic correlation method and a system for a petroliferous basin. The method comprises the steps of dividing a petroliferous basin into a plurality of deposition systems; conducting the stratigraphic correlation successively for each deposition system based on the isolithology correlation method, and also conducting the stratigraphic correlation for the deposition system based on the isochronous correlation method so as to obtain an isochronous-sequence stratigraphic framework of the deposition system; based on the isochronous-sequence stratigraphic frameworks of all the deposition systems, obtaining a comprehensive-sequence stratigraphic framework. According to the invention, the novel stratigraphic correlation technique with each deposition system as a unit is adopted. Different stratigraphic correlation methods are adopted for the same deposition system in the basin and different deposition systems in the basin. Meanwhile, the isolithology correlation of the traditional stratigraphy and the isochronous correlation of the sequence stratigraphy are combined for comprehensive analysis. Therefore, the stratigraphic correlation problem in the same deposition system and the stratigraphic correlation problem among different deposition systems can be effectively solved. As a result, exploration errors caused by stratigraphic correlation faults can be avoided.
Owner:CHINA PETROLEUM & CHEM CORP +1
Quantitative recovery method for carbonate rock stratum sedimentary micro-landform based on high-frequency cycle
PendingCN114609675AAchieve quantitative recoveryRaise the scaleSeismic signal processingSeismology for water-loggingWell loggingLandform
The invention discloses a quantitative recovery method for a carbonate rock stratum sedimentary micro-landform based on a high-frequency cycle, and relates to the technical field of ancient landform recovery. According to the method, sequence stratigraphy is taken as a theoretical basis, basic data information is fully applied, a spectrum analysis technology and a multi-scale matching method are adopted, an earthquake-logging sequence stratigraphic framework is established, sequence stratigraphic interface types and development characteristics are analyzed, isochronous geologic bodies are determined, and high-frequency cycle combination types and characteristics are acquired. Therefore, quantitative recovery of the carbonate rock stratum sedimentary micro-landform is achieved, the scale and precision of the sedimentary landform can be improved, powerful support is provided for deepening geological understanding and the next exploration direction, and then exploration risks and cost input are reduced.
Owner:SOUTHWEST PETROLEUM UNIV
High-precision seismic sequence division method
ActiveCN111665562AFine forecastImproved Seismic ResolutionSeismic signal processingSeismology for water-loggingStratigraphyGeophysics
The invention discloses a high-precision seismic sequence division method. The method comprises the following steps: S01, carrying out fine calibration on synthetic records; S02, obtaining a seismic inversion data volume; S03, performing high-precision seismic sequence division; and S04, predicting a favorable reservoir development area. The method has advantages that a problem that seismic sequence division cannot be carried out due to insufficient resolution of conventional seismic data is solved by using seismic inversion data, high-precision seismic sequence division method research is carried out in combination with seismic sequence stratigraphy, a favorable reservoir development area is searched in each sedimentary cycle, and a direction is pointed out for searching oil and gas resources.
Owner:SOUTHWEST PETROLEUM UNIV
Geological-Mechanical Modeling Method of Heterogeneous Reservoir Based on Finite Element Method
InactiveCN106443824BHigh utility valueHigh precisionGeological measurementsMixed finite element methodOperability
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
A Mapping Series and Technical Method for Construction of Continental Sequence Stratigraphic Framework
ActiveCN107153725BLogical thinkingSimple methodDesign optimisation/simulationGeographical information databasesWell drillingSeries (stratigraphy)
The invention provides a map series and technical method for construction of a continental sequence stratigraphic framework. The method includes the specific steps that in the aspect of 'points', drilling data is given priority to, and a single-well analysis map series and a mapping method are determined; in the aspect of 'lines', based on a connecting-well profile and a seismic profile, a map series and mapping method of the 'lines' are determined; based on research results of 'points and lines', according to a plane figure, a map series of 'surfaces' is determined; by means of a three-dimensional data body, through the combination with sequence stratigraphic 'body' research, a map series and mapping method of the 'body' are determined; by means of time data, based on the spatio-temporal evolution of sequence stratigraphy, a map series and technical method of the sequence stratigraphic 'body' are determined, and finally a sequence stratigraphic framework drawing is formed. By means of the method, mapping is started, a standard industrial drawing is formed, the map series and technical method can be directly used for guiding oil and gas exploration, the application effect of research results is improved, exploration risks are avoided, and exploration costs are reduced.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Protective layer selecting method of coal and gas outburst
InactiveCN102767372BRich choiceReduce mining deployment rescaling issuesUnderground miningSurface miningCoal measuresTectonics
The invention discloses a protective layer selecting method of coal and gas outburst, and aims at solving the problems that protective layer selection of coal and gas outburst mainly relies on experience and lacks theoretical basis. According to the invention, theories including sedimentology and sequence stratigraphy are adopted, and coal measure strata rock stratum property, rock stratum thickness, rock stratum spacing, coal seam thickness and sequence system domain of coal seams are analyzed; under the same geological tectonic conditions, the nearer the coal seams to transgression systems domain largest sea (lake) flooding surface positions, gas storage amount is larger (except limestone top floor coal seams), highlighted tendentiousness of coal seams and gas is larger, so according to the character, coal seam gas occurrence and highlighted tendentiousness of and coal and gas are performed, and theoretical selection of coal and gas outburst protective layer can be performed. The protective layer selecting method of coal and gas outburst perfects selection basis of coal and gas outburst protective layers, solves the problem of blindness of selection of infrastructure mine coals and gas outburst protective layer, and reduces readjustment of coal mining deployment.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Fracture development degree characterization method
ActiveCN110927819AScience Guidance ReferenceAccurate guide referenceGeological measurementsClassical mechanicsStructural engineering
The invention discloses a fracture development degree characterization method, which comprises the following steps that: a high-resolution sequence stratigraphy method is adopted to determine the calculation step length of fracture strength, and the value of the calculation step length is a sedimentary cycle thickness similar to seismic data identification accuracy; crack basic parameters comprising the number of cracks and crack inclination angles are acquired; the crack linear density and the crack apparent cutting ratio are quantitatively calculated through a fixed step length and windowingmethod, the crack linear density is the ratio of the number of cracks in the calculation step length to the calculation step length, and the crack apparent cutting ratio is the ratio of the sum of tangent values of crack inclination angles in the calculation step length to the calculation step length; and the fracture development degree of the single-well coring well section is characterized according to the fracture linear density and the fracture apparent cutting ratio. On the basis of research of a high-resolution sequence stratigraphy method, the definition of the linear length in the fracture linear density is perfected by clearly calculating the step length, and the fracture development degree difference caused by the fracture inclination angle difference is solved by adopting fracture apparent cutting ratio quantitative characterization.
Owner:CHINA PETROLEUM & CHEM CORP +1
Quantitative characterization method of low-position domain land frame edge delta
ActiveCN113343161ARich research methodsThe result is accurateGeological measurementsComplex mathematical operationsAggradationPosition domain
The invention discloses a quantitative characterization method for a low-level domain land frame edge delta, and the method comprises the following steps: selecting a profile of a target delta, and dividing a three-level sequence interface of the target delta through employing a seismic termination relation based on a classical sequence stratigraphy theory; in the three-level sequence interface, identifying a first upper super point, a first lower super point and a maximum initial sea pan surface angle change point of the initial sea pan surface on the three-level sequence interface; reading time values of the three points, and converting the time values into depth values by using a time-depth conversion formula; calculating the product distance of the delta according to the depth value; calculating the progradation distance of the delta according to the plane positions of the three points; calculating the gradient of the delta according to the aggradation distance and the progradation distance; and determining the type of the delta according to the calculation result of the gradient. According to the method, the types of the land frame edge delta in the low-position domain can be quantitatively divided, and technical support is provided for deep water deposition research.
Owner:SOUTHWEST PETROLEUM UNIV
A method and device for determining paleogeomorphology of sedimentary strata
The invention provides a method and device for determining a sedimentary stratum ancient landform. The method comprises the steps that objective horizon obtained in advance is divided according to the third-order sequence division mode in the sequence stratigraphy theory, and a sequence stratigraphic framework of the objective horizon is built to determine the studying sequence; the horizon, in accordance with the preset requirements, in the studying sequence is selected as restoring horizon; the thickness of the restoring horizon is obtained according to the top boundary and the bottom boundary of the restoring horizon; decompaction treatment is performed on the thickness of the restoring horizon to determine the original sedimentary thickness; the sedimentary stratum ancient landform is determined according to the mirror-image relationship between the original sedimentary thickness and the ancient landform. According to the method and device for determining the sedimentary stratum ancient landform, the condition that a denudation phenomenon may exist in the objective horizon is considered, the sequence stratigraphic division is performed on the objective horizon, a selection method of the restoring horizon is discussed under the constraint of the sequence stratigraphy theory to obtain the accurate stratum thickness used for ancient landform restoring, and therefore the accuracy of ancient landform restoring is improved.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Stratigraphic Correlation Method and System for Petroleum Basins
ActiveCN106324698BSolve strata correlation problemsAvoid prospecting mistakesGeological measurementsLithologyStratigraphy
Owner:CHINA PETROLEUM & CHEM CORP +1
Earthquake geological recognition method based on the sealing gas dessert area based on the sealing unit and the rough collection
ActiveCN108363100BImprove reliabilityReduce dependenceSeismic signal processingLithologyCoal measures
The invention discloses a seismic geology identification method of a coal-bed gas dessert zone based on a seal-up unit and a rough set. According to characteristics of composition factors of the seal-up unit, pre-stack / post-stack seismic data is used to implement integrated seismic geology interpretation of coal system stratum construction, lithology and rock elasticity and physical parameters aswell as integrated analysis on sequence stratigraphy, seismic stratigraphy, seismic sedimentology and coal-bed gas geology; different information complement one another; and a rough set identificationtheory is used to discriminate the composition factors in an integrated way, and a coal-bed gas desert zone is identified. Research on change characteristics of the coal bed itself are converted intoresearch on construction, deposition and lithology change which has effect on coal-bed gas migration in vertical and horizontal directions of the coal system, the rough set is introduced into an extended identification method, the identification process is less relied on experience, interference of artificial factors is avoided, the coal-bed gas dessert zone is identified more reliably, and the practical application value is high.
Owner:TAIYUAN UNIV OF TECH
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