35 results about "Provenance" patented technology

A method is provided for efficiently characterizing rock traversed while drilling a borehole for hydrocarbon reservoir development. A rock sample can be obtained having a provenance of collection linked to a specific region of the borehole, which is scanned to obtain a 2D digital image that is segmented to pixels characterized as pore space and as mineral matrix and defining a boundary between them. A transform relationship, for example, a form of the Kozeny-Carman equation adapted for application to a 2D segmented image environment, can be applied to calculate the estimated value for a target rock property, which can be absolute permeability, relative permeability, formation factor, elasticity, bulk modulus, shear modulus, compressional velocity, shear velocity, electrical resistivity, or capillary pressure, and the estimated value is used to characterize the rock at that region of the borehole. This affords an opportunity to quickly and efficiently develop massive data directly characterizing extended regions of rock, whether traversed by the borehole in this or a related well. Computerized systems, computer readable media, and programs for performing the methods are also provided.

The invention discloses a method for analyzing sand bodies in reservoirs based on an inversion technique of the sedimentary dynamics under the condition of sparse wells. The method is characterized in that through building a sand-body inversion model of sedimentary dynamics based on a principle of three-dimensional sedimentary transport geology and considering the control action of fluid velocity on sedimentary evolution and the reconstructive function of tectonic movements, the analysis on the distribution evolution of sand bodies in complex sedimentary basins under the condition of sparse wells can be realized. The method is implemented through the following steps: re-simulating the relationship between the three-dimensional attribute distribution data of a single sand layer of a reservoir and the time variation; carrying out variance making on the pre-simulated results and the results obtained by simulating well-point data as well as well logging interpretation and bore-hole data of the reservoir; according to the concept of a negative gradient search algorithm, modifying the terrain, flow field and source distribution of the reservoir; and operating the steps until the accuracy conditions of reservoir modeling are satisfied. The method disclosed by the invention provides a basis for the development of analysis on sand bodies in basin reservoirs under the condition of sparse wells, and is especially suitable for being applied to the research on sand bodies in sea basins with less drill holes.

The invention discloses an ultra-low permeability reservoir dominant seepage channel identifying and characterizing method. The method comprises the following steps of firstly, determining the material source direction of an oil production interval, the ancient riverway orientation, a sand body internal building structure and a single sand body rhythm type; determining micro-fracture parameters ofthe production interval, and constructing a three-dimensional fine geological model of a to-be-researched block; establishing a reservoir prediction model in the current development stage; establishing a four-dimensional reservoir underground streamline evolution model of the to-be-researched block, quantitatively evaluating the injection-production well communication relationship and the injection-production corresponding rate, and comprehensively identifying the position and the plane orientation of the dominant seepage channel between well groups; and quantitatively calculating the advancing speed of the water flooding front edge, the tracer agent interpretation swept volume, the tracer agent interpretation permeability and the Lorentz coefficient, screening static indexes and dynamicindexes capable of characterizing the strength of the seepage channel, and establishing an evaluation index system and defining parameters of the ultra-low permeability reservoir dominant seepage channel. According to the method, quantitative research on the three-dimensional space distribution rule of the channel provides guarantee for effective treatment of the extra / ultra-low permeability reservoir dominant seepage channel and improvement of the final recovery ratio of crude oil.

The invention belongs to the technical field of uranium ore mineralization potential evaluation, and particularly discloses an evaluation method suitable for judging a sandstone type uranium ore uranium source in a basin. The evaluation method comprises the steps of: (1) collecting an ore-containing target layer sandstone sample; (2) selecting chippings zircon in the sample to prepare a zircon target; (3) testing the U-Pb isotope and U element content of zircon; (4) acquiring a zircon isotopic age histogram and a zircon U-Pb isotopic age and U content element diagram according to the U-Pb isotope and the U element content; (5) providing a source magmatic rock age range and geographical distribution characteristics for the ore-bearing target stratum sandstone according to the analysis in the step (4); (6) finding out the age range of the detritus zircon with the highest U content and particle number ratio according to the U-Pb isotopic age of the zircon and the U content element diagram, and determining a uranium source in a pre-enrichment stage in combination with the step (5); and (7) determining a uranium source in the mineralization stage according to the steps (5) and (6). Theevaluation method provided by the invention can be used for judging uranium sources in sedimentary diagenetic and mineralization action stages of the ore-bearing target layer.

The invention discloses a method for determining a lithogenous phase boundary point of a carbonate reservoir stratum. In the method, with six geological parameters of sedimentary facies, provenance, apH value, sedimentary cycle, diagenetic stages and fault indexes being lithogenous phase type boundary binding conditions of the carbonate reservoir stratum, in combination with mine lithogenous phase data, lithogenous phase transverse distribution is predicted, and the defects in work of research on lithogenous phase transverse prediction in the prior art are overcome. The method determines theeffectiveness of the stratum, and provides bases for reservoir evaluation.

The invention provides a material source analysis method based on measurement of a Dpar value. The method comprises the following steps: measuring fission track Dpar values of samples in a deposition area and a source area; then grouping the obtained Dpar values by adopting a multi-dimensional scaling analysis method to obtain grouped data, and constructing a sedimentary area-source area coupling model by taking the Dpar values as parameters and matching the grouped data with the same Dpar value characteristics of the sedimentary area and the source area, so that the object source area and the rock type thereof can be accurately delineated, the sediment source can be determined, and the object source analysis is more accurate and credible. According to the material source analysis method, the material source analysis result can be accurately obtained only by measuring the Dpar value of the sample, thermal neutron irradiation does not need to be carried out on the sample in the Dpar value measuring process, and the time consumption for obtaining the Dpar value is short; the defect that in the traditional material source analysis process of measuring the fission track age, an analysis sample needs to be sent to an atomic nuclear reactor for thermal neutron irradiation or the irradiation time is long, and radioactivity exists is effectively overcome.

The invention provides a reconstruction method for ancient geological evolution of a sedimentary sand body provenance area, which comprises the following steps: S1, collecting geological data of the provenance area and an adjacent area, and collecting drilling data of the provenance area at the same time; s2, recovering the distribution of residual strata in the material source area; s2, recovering the distribution of residual strata in the material source area; s3, collecting the gravity of the provenance region and the adjacent region and the seismic data of the sedimentary basin; s4, recovering the ancient landforms of the provenance area and the basin; s5, identifying a material source channel of the sedimentary body in the basin; s6, collecting conglomerate data of a target interval in the basin; s7, describing gravel components, age and plane and vertical distribution characteristics in the conglomerate; s8, recovering material source information reflected by gravels in the conglomerate to the provenance area layer by layer; and s9, reconstructing the ancient geological evolution of the provenance area; and the reconstruction method for ancient geological evolution of the sedimentary sand body provenance area is simple and easy to operate, can predict basin sedimentary systems and reservoir distribution, and guides exploration and development of petroleum and natural gas mineral resources in petroliferous basins.

The invention discloses a source tracking system using lithologic geochemical genes, and belongs to the field of geological sample detection tracking systems. The source tracking system is characterized in that the geochemical genes represent the characteristics of the relative change trend of the content between elements of geological samples, and different geological samples have different geochemical genes, so the geochemical genes can be utilized to identify the geological samples. However, due to the complexity of the geological action, the geochemical properties of the elements may change in some special geological environments, resulting in a change trend among the elements, i.e., the geochemical genes of geological samples with the same source may change within a certain range (i.e., the variability of the genes).

The invention provides a set of technical method for systematically and comprehensively identifying a basin edge deposition fan body in a deep water area of a South China Sea oil-gas-containing basin.The invention relates to a method for quantitatively identifying a sedimentary fan body at the basin edge of a sedimentary basin by comprehensively analyzing six kinds of data such as same sedimentary faults, landforms, object sources, seismic facies, seismic attributes and a sedimentary center. The method is particularly suitable for deep water areas of oil-gas-bearing basins in the South ChinaSea. According to the method, on the basis of inheriting a former person recognition method, a tectonic sedimentology theory and a seismic sedimentology theory are combined, multi-method, multi-angleand five-in-one cooperation is adopted to recognize and judge the development of the basin edge sedimentary fan body, finally quantitative research is achieved, and the accuracy and credibility of a recognition result are greatly improved; meanwhile, different identifications in each identification method are assigned, the final total score is calculated, whether the fan body develops or not is quantitatively described, and the method is convenient and operable.

The invention provides a method and device for determining lithology of clastic garnet mineral mother rock. The method comprises steps of preliminarily determining the lithology of the clastic garnetmineral mother rock through employing a garnet Mg-Fe+Mn-Ca main element discrimination graph according to a main element analysis result of a to-be-detected clastic garnet mineral; and when the main element analysis result of the to-be-detected chip garnet mineral falls in the Type A, Type B or Type D region of the discrimination graph, further determining the parent rock lithology of the to-be-detected chip garnet mineral by utilizing the trace element analysis result of the to-be-detected chip garnet mineral. According to the method, garnets from a basic rock source and a variable basic rocksource can be more systematically and accurately distinguished, garnets from different types of skarn sources can be distinguished, and garnets from a granite source, a high-grade granite phase-change argillaceous rock source and a medium-low-grade hornstone phase-change argillaceous rock source can be distinguished; and therefore, the method plays an important role in the aspects of material source recovery research, even basin-mountain coupling relationship research and the like.

The invention discloses a source-sink system quantitative evaluation method, and belongs to the field of sediment source analysis. The method comprises: constructing a conceptual model based on geological data; determining simulation parameters under the guidance of the conceptual model, and establishing a sedimentary stratum quantitative model through stratum forward modeling based on the hydrodynamic principle; based on the principle of conservation of substances, combining with real geological data to verify that the sedimentary model is reasonable, and extracting sedimentary thicknesses from different material sources in different time steps by using the model after the material source input mode is changed; and calculating and processing the thickness of the sediments from different material sources in the simulation time step length, and analyzing the contribution of the sediments from different material sources. The method solves the problems that an existing method cannot carry out work in areas without wells or with few wells, and sediments from different material sources in the basin cannot be quantitatively distinguished. In consideration of internal and external dynamic geological effects such as reference surface lifting and structural activity, the method has the characteristic of quantitatively evaluating the relative contribution of sediments from different mother rock areas in the basin in different time steps in the source-sink system.

The invention provides a method and device for calculating the denudation rate of a source region of a sedimentary basin. The method comprises the steps: carrying out macroscopic sedimentation background analysis of a target layer according to seismic data of the target layer, and determining plane positions of a source region, a carrying region and a convergence region of sediments in a sedimentation period of the target layer; carrying out statistics to obtain the plane area and the number of sedimentary bodies in the convergence region; carrying out statistics to obtain the average thickness of the sedimentary body in the convergence region; carrying out statistics to obtain the number of channels in the carrying region, the sectional area of the carrying channel and the extension length of the carrying channel; determining the denudation area of the source region and the denudation duration of the target layer; and calculating the denudation rate of the sedimentary basin source region. According to the method, the denudation rate of the sediment source region is accurately calculated, the denudation rate of the sediment basin source region is quantitatively represented, and theimprovement of the accuracy of paleo-geomorphic recovery and paleo-climatic condition recovery in the deposition period of the target layer is facilitated.

The invention relates to a method for discriminating marine and continental depositional environments by selectively extracting exchangeable strontium-barium ratios from terrigenous clastic sediments. The method is as follows: collect an appropriate amount of loose sediment, remove visible biological debris, dry it at low temperature and crush it to a size no larger than 100 mesh, weigh an appropriate amount of the sample and add a certain concentration of ammonium acetate or sodium acetate at a suitable solid-liquid ratio as the extraction method. Stir or oscillate (ultrasonic oscillation is also acceptable) under normal temperature and pressure conditions, perform solid-liquid separation after the reaction, and use the clear liquid for instrumental analysis (ICP-OES or ICP-MS, etc.) to determine strontium and barium, and the obtained The ion-exchangeable strontium-barium ratio is greater than 1.0 for marine depositional environment, and less than 1.0 for continental depositional environment. This method not only eliminates the interference of strontium barium in silicate minerals on the discrimination of marine and continental sedimentary environments, but also eliminates the interference of strontium and barium in provenance carbonate minerals on the identification of marine and continental sedimentary environments .

The invention discloses a lake basin material source and sand body migration direction identification method and device. The identification method comprises the following steps of: establishing a small-layer or single-layer comparison grillwork of a target interval of a research area; dividing sandstone of the target interval of the research area into good sandstone and poor sandstone by utilizinga natural gamma curve; drawing a good sandstone contour map and a sand-land ratio contour map of the target interval of the research area by utilizing the thickness data of the good sandstone; and utilizing the thickness contour map of good sandstone and the sand-land ratio contour map to analyze the material source of the lake basin and the migration direction of the sand body. According to themethod, the false phenomena that the whole basin contains sand and the material sources are connected due to longitudinal superposition of the sand bodies without distinguishing the sand bodies in thepast are eliminated, so that the identification of the material sources and the migration direction of the sand bodies is more intuitive and precise, and more information is reflected.

The invention discloses a method for measuring and calculating the starting critical depth of solid matter in mud-rock flow and the maximum flushing total amount, and a method for predicting the scale of mud-rock flow. Aiming at the defects in the existing technology that there are differences in the measurement accuracy of various measurement and calculation due to the difference in the research area, and that the universality of various measurement and calculation schemes is not high and the application is obviously limited, the present invention provides a measurement and calculation of the critical depth of the start-up of debris flow solid matter method and its application. According to the water source conditions and solid material conditions in the provenance area, it is judged that the start-up of debris flow in the provenance area belongs to the unsaturated seepage-runoff start-up mode, or the unsaturated seepage start-up mode, and then calculate the start-up critical depth. This method is a fully quantitative calculation method based on a dynamic model, which can specifically solve the defects that the existing technology is limited to a specific provenance area object and insufficient calculation of unexpected extreme debris flow disaster events that deviate from the constant value. The invention also provides a method for measuring and calculating the maximum total amount of mud-rock flow and its application, and a method for predicting the activity scale of mud-rock flow.

The invention discloses a mud-rock flow risk assessment method and device based on a solid source subsystem. The method comprises: acquiring the area data of the whole basin of the debris flow basin to be evaluated, the area data of the solid matter source, the minimum elevation data and the maximum elevation data; Using the acquired area data of the whole watershed, solid material source area data, minimum elevation data and maximum elevation data, construct the state variables of the solid source subsystem of the debris flow basin; use the constructed state variables of the solid source subsystem of the debris flow basin to construct the debris flow An information entropy model of the solid matter source subsystem of the watershed; using the constructed information entropy model of the solid matter source subsystem of the debris flow watershed to carry out risk assessment on the debris flow watershed to be assessed.

A method and a device of predicting reservoir sand bodies based on a wind field-provenance-basin system are provided. The method includes: acquiring geological data of a to-be-predicted area, which includes several of core data, paleontological data, well logging data and seismic data; inputting the geological data into a preset wind field-provenance-basin system model, for generating beach-bar-sand-body formation-process-data for the to-be-predicted area, where the wind field-provenance-basin system model includes several of a paleo-provenance restoration tool, a paleo-wind force restoration tool, a paleo-wind direction restoration tool, a paleo-geomorphology restoration tool and a paleo-water depth restoration tool; and predicting distribution locations where the beach-bar sand bodies are distributed in the to-be-predicted area using geological methods and geophysical methods based on the beach-bar-sand-body formation-process-data.

The invention discloses a post-earthquake debris flow risk assessment method based on source activity intensity, which belongs to the field of debris flow prevention and control engineering, and is characterized in that it comprises the following steps: a. classifying activity intensity; b. calculating Evaluate the probability comprehensive discriminant value F of different grading conditions of factors; c. Determine the weight W of each type of factor i And the weight value K of each level of activity intensity for the area j ; d. Construct the risk model under each activity intensity condition of the source body through weighted superposition calculation; e. Calculate the total risk value of the area and divide it into five levels. The present invention introduces the multi-stage debris flow source body activity intensity into the evaluation model by the probability comprehensive discriminant method, considers the topographic and hydrological factors in combination with the analytic hierarchy process, and comprehensively weights and superimposes to obtain the evaluation result of the debris flow risk after each phase of the earthquake, which can effectively improve the debris flow in the earthquake area. The accuracy of risk assessment provides a more powerful basis for the prediction and prevention of post-earthquake debris flow disasters.

The present invention proposes a method for quantitatively characterizing the development degree of permeable interlayers in shale. The method is based on, for example, seismic inversion data volumes of formation lithology attributes, three-dimensional structural modeling data volumes, and drilling data. / The actual drilling lithology data is the calculation unit, and the critical value of the interlayer thickness is used as a constraint. Through the establishment of a mathematical model, the interlayer development strength, interlayer distribution coefficient and interlayer dispersion coefficient are calculated for the drilling well, and then the interlayer is comprehensively calculated through normalization. The development index STI, combined with the main provenance direction determined by the results of the study of the sedimentary facies of the area, for example, is used to calculate the plane distribution of the STI index of the target layer, such as Kriging interpolation. Apply the method of the present invention to compile calculations and programs, and calculate the drilling STI index of the actual exploration work area. The comparison between the calculation results and the drilling histogram shows that the STI value can scientifically, reasonably and quantitatively reflect the development degree of the interlayer in the mud shale, reaching the expectation of the present invention. Effect.

The invention relates to a method utilizing lithological combination identification sedimentary facies. The method comprises the following steps that S1, the lithological combination index of a study layer section is collected and processed; S2, the depositional environment is judged utilizing the mudstone color index; S3, sedimentary facies belt is judged utilizing the mudstone thickness index; S4, the material source stability is judged utilizing the sandstone thickness disparity; S5, the study layer section lithology is judged utilizing the lithology index; S6, the hydrodynamic strength is judged utilizing the sandstone grain size index; S7, the grain size variation is judged utilizing the sandstone grain size variation index; S8, the material source stability is judged utilizing the sandstone thickness index; S9, the ranges of the sedimentary facies form step S2 to step S8 is reduced step by step according to the study layer lithological combination index, so that the sedimentary facies is judged; and the step S2 to step S8 are not sequential.

The invention discloses a clastic rock reservoir grading evaluation method, and relates to the technical field of reservoir grading evaluation. The problem that a unified reservoir grading evaluation standard does not exist is solved. The clastic rock reservoir grading evaluation method comprises the following steps that each specific parameter for controlling the reservoir quality is summarized and concluded into four factors, namely a material source factor, a deposition factor, a diagenesis factor and a formation pressure factor; and then grading evaluation is carried out on the reservoir in a research area based on the material source factor, the deposition factor, the diagenesis factor and the formation pressure factor. The reservoir quality control parameters can be comprehensively reflected, reservoir grading evaluation standards can be unified, the unified reservoir grading evaluation standards are adopted to perform grading evaluation on reservoirs, and the clastic rock reservoir grading evaluation method can be applied to exploration and development work of petroliferous basins. The clastic rock reservoir grading evaluation method is used for performing clastic rock reservoir grading evaluation.

The invention belongs to a uranium mineralization prediction technology, and particularly relates to a sandstone type uranium ore mineralization source identification method, which comprises the following steps of: compiling an Sc-La-Th discriminant function graph, a source area construction background discriminant function graph and a source area source property discriminant graph, sampling for microelement and macroelement analysis, respectively performing construction background discrimination by using an Sc-La-Th element, and determining the source property of the source area; constructing a background discrimination function diagram by using the source region to carry out background discrimination; and discriminating the provenance property of the provenance region by using the provenance region provenance property discrimination graph. According to the method, on one hand, main and trace elements can be utilized to quickly, accurately, economically and effectively identify the material source characteristics of the sandstone type uranium ore, reference is provided for mineralization research, on the other hand, the practicability is high, the method is easy to operate, and the rapidness, the high efficiency and the practicability of the method can be better embodied.

The present invention provides a method and device for calculating the denudation rate of the source area of ​​a sedimentary basin. The planar position of the source area, transport area and converging area; the plane area and the number of sedimentary bodies in the converging area can be obtained by statistics; the average thickness of the sedimentary body in the converging area can be obtained by statistics; The cross-sectional area of ​​the channel and the extension length of the transport channel; determine the denudation area area of ​​the provenance area and the denudation duration of the target interval; calculate the denudation rate of the provenance area of ​​the sedimentary basin. This method realizes the accurate calculation of the denudation rate of the source area of ​​the sediment, quantitatively characterizes the denudation rate of the source area of ​​the sedimentary basin, and is conducive to improving the accuracy of the restoration of paleogeomorphology and paleoclimatic conditions during the sedimentary period of the target interval.

The invention provides a water system deposit sediment element or mineral survey data integrated and displaying method by taking an opening catchment basin as a unit, relating to the technical field of exploration geochemistry. The method adopts GIS development technology to treat the water system and the catchment basin with a conventional method, so as to obtain the opening catchment basin; by taking the opening catchment basin as a unit, elements or mineral kinds and the corresponding content of all sampling points in the basin are counted to build an element or mineral combined model, thecalculated result is used as basin property, and achievement expression is carried out by using the opening catchment basin. The invention can directly display the water system deposit sediment element or mineral provenance range or the direction of mineral migration, so as to be convenient for analysis and mapping and field checking of spatial distribution regularities.

A method for restoring the original sedimentary appearance of a strike-slip reformed basin, including the following steps: (1) Determine the strike-slip reformed basin, clarify whether the sedimentary body associated with the strike-slip fault has experienced strike-slip fault segment reformation, and further determine from 3 aspects to be determined and judged. For basins that have undergone strike-slip reformation, (2) synchronous strata-sediment relationship and (3) provenance relationship analysis should be carried out in sequence. Among them, the distribution patterns of paleocurrents and high-precision detrital zircon provenance tracing can indicate whether each residual basin has a common provenance area and the possible source area location. On the basis of the above three-step analysis, (4) estimate the dislocation distance and restore the original sedimentary appearance for the strata on both sides of the strike-slip fault in the same period. The objective restoration of its original sedimentary appearance is the basis for objectively understanding the paleogeographical appearance and basin-mountain paleo-tectonic pattern in the geological history period, as well as the basis for scientific evaluation of oil and gas resources and efficient exploration deployment, so its research significance is very important.

The invention discloses a method for calculating the bulk density of debris flow based on the temporal and spatial evolution of disasters. The method (1) determines the reference value of the bulk density of debris flow; Reserves, watershed area, relative height difference of watershed, provenance characteristic parameters of the stage where the reference value is obtained and the stage to be calculated; (3) the adjustment coefficient of the provenance state obtained; (4) the stage where the reference value is obtained, and the stage to be calculated Based on the clear water flood peak flow rate corresponding to the rainfall frequency of the stage, the hydraulic condition adjustment coefficient under the rainfall frequency is obtained based on the clear water flood peak flow rate; (5) The debris flow density of the gully is obtained based on the provenance state adjustment coefficient and the hydraulic condition adjustment coefficient; ( 6) Obtain the debris flow bulk density of the cross-section through the scour-silting characteristics of the channel section, the dynamic volume of solid matter, and the characteristic parameters of the composition of solid matter particles.

A method for recovering an original sedimentary appearance of a strike-slip transformation basin comprises the following steps of: (1) determining the strike-slip transformation basin, determining whether a sedimentary body associated with strike-slip fracture at present is subjected to strike-slip fault dislocation transformation or not, and further determining and identifying from three aspects; for the basin subjected to strike-slip transformation, (2) analyzing the stratigraphic deposition relation in the same period and (3) analyzing the material-source relation in sequence, wherein the distribution pattern of paleocurrent and high-precision chipping zircon source tracing can indicate whether each residual basin has a common source region and a possible source region position or not; and (4) on the basis of analysis in the three steps, carrying out dislocation distance estimation and original sedimentary appearance recovery on stratums at the same time on the two sides of a strike-slip fault. Objective recovery of the original sedimentary appearance is a basis for objectively knowing the paleo-geographical appearance and the basin-mountain paleo-structure pattern in the geologic history period, and is also a basis for scientifically evaluating oil and gas resources and efficiently exploring and deploying, so that the research significance of the method is very important.