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49 results about "Conglomerate" patented technology
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Conglomerate (/kənˈɡlɒmərɪt/) is a coarse-grained clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts, e.g., granules, pebbles, cobbles, and boulders, larger than 2 mm (0.079 in) in diameter. Conglomerates form by the consolidation and lithification of gravel. Conglomerates typically contain finer grained sediment, e.g., either sand, silt, clay or combination of them, called matrix by geologists, filling their interstices and are often cemented by calcium carbonate, iron oxide, silica, or hardened clay.
Construction method for constructing filling pile with electric drill and rotary digging relay drill
InactiveCN107165160AContribute to the improvement of competitivenessTake advantage ofBulkheads/pilesSlurryEngineering
The invention discloses a construction method of cast-in-situ piles constructed by electric drill and rotary drilling relay drill, which includes two stages of construction preparation and construction operation; the construction preparation stage includes: 1) construction technology preparation stage; 2) site preparation stage; 3), mud preparation and circulation stage; 4), construction machinery, raw material preparation. Using this construction method mainly improves the utilization rate of machinery, speeds up the speed of hole formation, and shortens the time of hole formation. Electric drill construction in soft soil layer is more economical than rotary excavation pile machine, and the speed is faster than rotary excavation. The depth of rock penetration is difficult to judge and other problems. According to the construction records of the pile test stage, the electric drill has a footage of about 30cm / hour in the 5-1 weakly cemented conglomerate layer, and the 5-2 medium cemented conglomerate layer has a footage of about 10cm / hour, and the speed of the rotary pile machine in the 5-1 weakly cemented conglomerate layer is about 100cm / hour, the speed of 5‑2 medium cemented conglomerate layer is about 50cm / hour, and the speed is greatly improved.
Owner:SHANGHAI BAOYE GRP CORP
Conglomerate full-diameter rock core radial flow oil-water relative permeability measuring device and method
ActiveCN110907334AAccurately achieve temperatureAccurately realize the conditionsPreparing sample for investigationPermeability/surface area analysisSoil scienceRock core
The invention discloses a conglomerate full-diameter rock core radial flow oil-water relative permeability measuring device and method. According to a conglomerate full-diameter rock core radial flowoil-water relative permeability measuring experimental device, an experimental process and an experimental data processing method, the radial seepage process of the oil and water near a wellbore underthe formation temperature and pressure can be accurately simulated, and the radial seepage oil and water relative permeability of the conglomerate full-diameter rock core is measured. The experimental device comprises a vacuumizing system, a pressure supply system, a simulated reservoir module and a produced liquid metering system. The experimental process comprises the following steps of full-diameter rock core pretreatment, rock core absolute permeability determination, rock core vacuumizing and water saturation, an oil displacement water method rock core saturated oil experiment and the water displacement oil unsteady state method oil-water relative permeability measurement experiment. The data processing method is a full-diameter rock core radial flow oil-water relative permeability curve calculation method derived on the basis of a Darcy formula, a B-L radial seepage equation, a flow function G and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method for calibrating electric resistance curve of ash-containing geological formation
InactiveCN109061752AEasy accessAccurately reflectMaterial resistanceElectric/magnetic detectionAnalysis dataRegression analysis
The invention discloses a method for calibrating electric resistance curve of ash-containing geological formation, comprising the steps of: constructing a corresponding mathematical model by using sheet analysis data and log response value sensitive to a ash matter to calculate the ash matter content; and then analyzing the intersection diagram of the ash matter content obtained from rock core analysis and the multiplying factor of the increased logRT; establishing the calibrated electric resistance to ash matter content model by regression analysis, and correcting the resistivity to ash matter. The method for calibrating the electric resistance curve of the ash-containing geological formation of the present invention uses the curve of ash matter content from rock core analysis over electric resistance of to establish a model to obtain the ash matter content, and reasonably establishes the model and corrects the electric resistance according to the characteristics of complex sandy conglomerate and logging response characteristics.
Owner:SOUTHWEST PETROLEUM UNIV
Dense conglomerate oil reservoir horizontal well refracturing simulation method
ActiveCN113011048ADesign optimisation/simulationSpecial data processing applicationsHorizontal wellsConglomerate
The invention provides a horizontal well refracturing simulation method for a compact conglomerate oil reservoir. The method comprises the following steps: establishing a geologic model according to oil reservoir data; obtaining an initial fracture network model through UFM fracture propagation simulation, and obtaining a final fracture simulation fracture network form through correction; establishing an unstructured grid numerical simulation model and performing correction through production dynamic simulation; optimizing a water injection scheme through water injection energy increasing simulation, and optimizing soaking time through four-dimensional geological modeling based on the optimized water injection scheme; establishing a fracture network model after refracturing; and establishing a numerical simulation model after refracturing and carrying out refracturing production dynamic simulation. According to the method, the existence of multiple groups of micro-scale natural fracture equivalent gravels is adopted, so that fracture expansion better conforms to the conglomerate oil reservoir; through four-dimensional crustal stress modeling, crustal stress models at different time points are established, and a basis is provided for determining a conglomerate oil reservoir water injection scheme and soaking time after water injection, namely, when to carry out refracturing work according to crustal stress recovery conditions.
Owner:SOUTHWEST PETROLEUM UNIV
Conglomerate granularity evaluation method based on CT three-dimensional model reconstruction
PendingCN113345075AIncrease contrastRemove image noiseImage enhancementImage analysisContrast levelModel reconstruction
The invention discloses a conglomerate granularity evaluation method based on CT three-dimensional model reconstruction, and the method comprises the following steps: S1, selecting a conglomerate sample with the diameter of 10-100 mm, and carrying out the CT three-dimensional scanning of the selected conglomerate, and obtaining a two-dimensional gray image and a three-dimensional digital core data body of the conglomerate sample; S2, performing image processing on the two-dimensional grayscale image, eliminating image noise and enhancing the contrast ratio of conglomerate and a matrix in the image; S3, gravel in the image is extracted and segmented; S4, calculating the diameter of each gravel and constructing a three-dimensional model of the gravel; and S5, carrying out particle size analysis on gravels and interstitial substances in the conglomerate. Under the condition that a rock sample is not damaged, the size and the distribution of the gravel in the glutenite are conveniently and reliably analyzed, the three-dimensional space distribution characteristics of the gravel structure are visualized, a new method is provided for quantitative analysis of the size and the distribution of the gravel diameter, and meanwhile the application of the digital core technology in particle size analysis is expanded.
Owner:SOUTHWEST PETROLEUM UNIV
Conglomerate reservoir evaluation method based on gravel component analysis
PendingCN113137225AAccurate and convenient evaluationQuick Guide to Exploration and DevelopmentBorehole/well accessoriesWell loggingConglomerate
The invention provides a conglomerate reservoir evaluation method based on gravel component analysis. On the basis of conglomerate gravel component analysis, microscopic characteristics (gravel components and surface porosity) and macroscopic characteristics (reservoir pore permeability and oil and gas productivity) of a conglomerate reservoir are combined, and the control effect of the conglomerate gravel components on an oil and gas reservoir is discussed, so that a correlation between the gravel components and reservoir physical properties and oil and gas productivity is established. The conglomerate reservoir evaluation method based on the gravel component analysis is a direct reservoir geological evaluation method and can accurately and conveniently evaluate the conglomerate reservoir without depending on geophysical logging information, so that the exploration and development of the conglomerate oil and gas reservoir are accurately and quickly guided.
Owner:OIL & GAS SURVEY CGS
Reconstruction method for ancient geological evolution of sedimentary sand body provenance area
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.
Owner:OIL & GAS SURVEY CGS
Well logging sandy conglomerate lithology fine evaluation method based on electric imaging
ActiveCN110716239AEvaluation method is reliableThe calculated result is accurateElectric/magnetic detection for well-loggingAcoustic wave reradiationLithologyWell logging
The invention belongs to the technical field of well logging in the petroleum exploration and development industry, and particularly relates to a well logging sandy conglomerate lithology fine evaluation method based on electric imaging. The evaluation method is more reliable in evaluation mode and more accurate in calculation result. The evaluation method comprises the following steps of carryingout blank strip filling preprocessing on a two-dimensional static micro-resistivity scanning image; carrying out edge detection on conglomerate particles in the image subjected to the filling preprocessing, and segmenting out the conglomerate particles from a background; according to geological deposition constraint conditions, carrying out region merging and splitting on the segmented conglomerate particles; and calculating a particle size spectrum and a lithology curve based on a sliding window and the particle size.
Owner:CHINA PETROCHEMICAL CORP +4
Experimental device and method for simulating casing damage process
The invention discloses an experimental device and method for simulating a casing damage process, and relates to the field of petroleum engineering rock mechanics. The experimental method comprises the steps: a rock test piece for simulating a stratum is manufactured, the rock test piece sequentially comprises a shale layer, a conglomerate layer and a mudstone layer; a fault is prefabricated in the manufacturing process of the rock test piece; a shaft is drilled in the rock test piece, the shaft penetrates through the fault, and a casing is mounted in the shaft; in the process of applying thetriaxial pressure, data of a displacement deformation sensor and data of the triaxial pressure applied to the rock test piece are recorded; and the rock test piece is taken out, the casing is taken out to observe and record the damage conditions of the casing and a cement sheath, and the influence of the rock stratum stress difference on casing damage is analyzed according to the damage conditionsof the casing and the cement sheath, the data of the displacement deformation sensor and the data of the triaxial pressure applied to the rock test piece. The casing damage process can be simulated,factors causing casing damage are analyzed, and finally prevention and treatment of the casing damage problem of the oil-gas well of the oil field are achieved.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
High-fidelity heterogeneous conglomerate artificial core and manufacturing method thereof
PendingCN114486417AExact permeabilityPrecision sensitivityPreparing sample for investigationPermeability/surface area analysisRock corePlasticizer
The invention discloses a high-fidelity heterogeneous conglomerate artificial core and a manufacturing method thereof.The manufacturing method includes the steps that S1, local air setting sand, local riverbed sand and quartz powder of different particle fractions are mixed to form mixed sand, formation water of a corresponding stratum is added into the mixed sand and stirred to be uniform, and the mass of the formation water accounts for 2-15% of that of the mixed sand; s2, uniformly mixing a diluent, epoxy resin, a plasticizer and a curing agent to prepare a cementing agent; the mass of the epoxy resin is 4-12% of the mass of the mixed sand, the mass of the plasticizer is 6-17% of the mass of the epoxy resin, the mass of the curing agent is 5-15% of the mass of the epoxy resin, and the mass of the diluent is 15-65% of the mass of the epoxy resin; and S3, adding the cementing agent into the mixed sand, uniformly stirring, pressing in a mold, and molding to obtain the artificial rock core. The manufactured artificial rock core is closer to a natural rock core, so that the accuracy of an indoor simulation experiment is improved.
Owner:PETROCHINA CO LTD
Oil reservoir development mode optimization method based on starting pressure under flow coefficient
The invention provides an oil reservoir development mode optimization method based on starting pressure under a flow coefficient. The method comprises the steps of calculating the flow coefficient, testing starting pressure gradients of different fluids injected into rock cores with different permeability rates, establishing a flow coefficient-starting pressure gradient curve, and selecting reasonable development modes for different types of oil reservoirs according to test results. According to the method, the physical properties of a reservoir and the properties of the fluids are consideredat the same time, and the application range is wider (including various development methods such as water flooding, gas flooding and chemical flooding). The method can be used for evaluating the starting pressure gradients of different flow coefficients under the conditions of different low-permeability reservoir rock cores and different types of injected fluids. Meanwhile, the method is not onlysuitable for sandstone oil reservoirs, but also suitable for lithologic oil reservoirs such as low-permeability carbonate rock, conglomerate and shale, the application range is wide, and a quantitative basis is provided for optimization of different types of oil reservoir development modes, selection of the technical direction of improving the recovery efficiency and judgment of the permeability limit of the low-permeability oil reservoirs suitable for different injected fluids.
Owner:PETROCHINA CO LTD
Method for identifying conglomerate oil layer through resistance reduction rate based on clay type
PendingCN111911141AAccurate identificationOvercome limitationsDesign optimisation/simulationSpecial data processing applicationsPorositySoil science
The invention discloses a method for identifying a conglomerate oil layer through resistance reduction rate based on a clay type, and belongs to the field of oil and gas reservoir logging evaluation.The method for identifying the conglomerate oil layer through the resistance reduction rate based on the clay type is characterized in that based on the fact that clay in a reservoir is the same as clay in an adjacent mudstone layer in type, the influence on resistivity of the reservoir and resistivity of the mudstone layer is in the same direction, the resistance reduction rate obtained by dividing the resistivity of the reservoir and the resistivity of the mudstone layer removes the influence of the clay, and based on a resistance increase rate theory of an Archie formula, the porosity is evaluated by combining density logging so that the conglomerate oil layer can be accurately identified. According to the method for identifying the conglomerate oil layer through the resistance reduction rate, the limitation of identifying the conglomerate oil layer by using the resistance increase rate is overcome, the influence of the clay on the reservoir resistivity is effectively eliminated, the conglomerate oil layer can be accurately identified by using the resistance reduction rate in combination with density logging, and the chart application coincidence rate is 100%.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Evaluation method and correction method of rock abrasiveness parameters in conglomerate formation
ActiveCN113009592BEasy to calculateReduce learning costsGeological measurementsConglomerateRock sample
An evaluation method and a correction method for rock abrasiveness parameters in conglomerate formations. The evaluation method of the rock abrasiveness parameter includes: calculating the abrasiveness parameter of the rock sample according to the logging data of the rock sample; the logging data includes density logging data, resistivity logging data, neutron pore Degree logging data, natural gamma ray logging data and acoustic logging data. The present invention utilizes density logging data, resistivity logging data, neutron porosity logging data, acoustic logging data and natural gamma logging data to directly evaluate rock abrasiveness parameters of conglomerate formations, which is easy to calculate and low in cost. It is of great significance for the selection of drill bits in conglomerate formations, high-efficiency rock-breaking drilling, and cost reduction and efficiency enhancement of drilling engineering.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Preparation process and application of slurry for high-efficiency drilling of steep and sparse clastic rock stratum
InactiveCN111154465AReach pluggingSafe and fast drillingFlushingDrilling compositionCelluloseSodium Bentonite
The invention discloses a preparation process of a slurry for high-efficiency drilling of a steep drainage clastic rock stratum. Various components added in slurry are optimized, corresponding proportional relations are adjusted, and the slurry is prepared by adopting different proportions aiming at working areas with the characteristics of many conglomerate layers, poor cementation, sand-mud interbedding, thick layers and steep drainage of the stratum. The slurry is prepared by adjusting the drilling depth: a coarse dispersion low-solid-phase mud system is adopted for a drilled hole with thedesigned depth within 400 m; and for a drill hole with the design depth larger than 400 m, a film-forming wall-protecting low-solid-phase mud system is adopted. Materials used in the invention comprise sodium bentonite, an anti-collapse while-drilling plugging agent, potassium chloride, a tackifier, a film forming agent B, modified asphalt and a fluid loss agent, and can also comprise high-viscosity cellulose, a high-efficiency lubricant and a coating agent. By the adoption of the slurry, high-efficiyenc drilling in the abrupt clastic rock stratum of a certain uranium mine area is achieved, and the engineering problems of hole leakage, chipping, hole collapse, hole shrinkage and the like are avoided.
Owner:中广核铀业新疆发展有限公司 +1
Glutenite mass fan-to-fan identification method
The invention provides a glutenite mass fan-to-fan identification method, which comprises the following steps: step 1, carrying out ancient landform restoration by utilizing seismic data, and determining a plane position of fan-to-fan development; step 2, carrying out petrology characteristic research on well logging and logging information of the fan-to-fan actual drilling well, and determining lithofacies characteristics of the fan-to-fan; step 3, carrying out research on the logging response characteristics of the fan-to-fan real drilling well, and determining the logging facies characteristics of the fan-to-fan; step 4, carrying out sandy conglomerate fan-to-fan sedimentary mode research based on geological research and seismic reflection characteristic research, and establishing a fan-to-fan sedimentary model; step 5, performing forward modeling seismic record characteristic simulation on the fan-to-fan sedimentary model to obtain seismic reflection characteristics of the fan-to-fan of the glutenite body; and step 6, comprehensively establishing a seismic geology identification quantity version of the sectors between the sectors of the glutenite mass. The method for identifying the sectors between the glutenite sectors is a simple and easy identification method for identifying the sectors between the glutenite sectors.
Owner:CHINA PETROLEUM & CHEM CORP +1
Oil sand interlayer quantitative identification method and system based on electric imaging logging
ActiveCN111983702ASolving Log Identification ProblemsDrilling and coring reductionElectric/magnetic detection for well-loggingWater resource assessmentLithologySupport vector machine
The invention relates to an oil sand interlayer quantitative recognition method and system based on electric imaging logging. The method comprises the steps that electric imaging logging data are preprocessed; two parameters of longitudinal and transverse difference variance of the 192 curves are calculated based on 192 curves of electric imaging logging; logging response characteristic analysis is carried out on the seven lithology, and lithology sensitive parameters are selected; respectively reading natural gamma, lithology density, photoelectric section indexes, longitudinal difference variance and transverse difference variance values corresponding to the seven lithology on the basis of rock core lithology, and establishing a lithology identification model by utilizing a support vector machine in a classified manner; taking natural gamma, lithologic density, a photoelectric section index, a longitudinal difference method and a transverse difference variance value as input curves;and calling a lithology identification model, utilizing a support vector machine to classify and identify lithology, dividing the types of the mud conglomerate through the mud content, and taking themud conglomerate with the mud content of more than 30% as an interlayer to realize quantitative identification of the oil sand interlayer based on electric imaging logging.
Owner:CNOOC TIANJIN BRANCH +1
Prediction method for extension track of hydrofracture complex fracture of conglomerate reservoir
The invention discloses a conglomerate reservoir hydrofracture complex fracture extension trajectory prediction method, which comprises the following steps: generating a square servo boundary, and randomly generating a matrix particle model in the servo boundary; generating a gravel profile in the matrix particle model; defining the matrix in the gravel contour as a gravel particle cluster, and respectively assigning the mesomechanics parameters of matrix particles and gravel particles; gravel edge contact on the gravel contour is obtained by writing a traversal function; establishing a pipe domain seepage model, carrying out fluid-solid coupling, giving an injection rate, and establishing a crack extension criterion; gravels with different cementation strengths and crack extension tracks under the gravel edges with different cementation strengths are simulated by changing microscopic mechanical parameters of gravel particles and gravel edges. The method has the following beneficial effects that complex geometrical shapes and irregular outlines of gravels and different cementing strengths of gravel edges are fully considered, and the process of generating complex cracks when hydrofracture cracks meet the gravels can be further known.
Owner:SOUTHWEST PETROLEUM UNIV
Fluid identification method and device
The invention discloses a fluid identification method and device. The method comprises the steps: determining a classification critical value of the content of acid minerals used for classifying conglomerate reservoirs, classifying the conglomerate reservoir according to the classification critical value and the content of acidic minerals in the conglomerate reservoir to obtain a conglomerate reservoir classification result, establishing an acid mineral content and resistivity cross plot corresponding to the conglomerate reservoir classification result, and identifying the fluid type in the conglomerate reservoir according to the acid mineral content and resistivity cross plot. According to the method and device, the technical problem that the fluid containing the acid mineral conglomeratecannot be accurately judged in the prior art is solved.
Owner:PETROCHINA CO LTD
Construction method of full-section excavation of conglomerate type V surrounding rock diversion and flood discharge scouring tunnel in the western region
A full-section excavation construction method for diversion and flood-discharge sand tunnels in Type V conglomerate surrounding rocks in the Western Regions. According to the excavation section size in the design drawings, a laser guide is used to point, and a total station is used to stake out the tunnel face; The mechanical short-footage full-face excavation method is used to excavate the conglomerate type V surrounding rock tunnel in the Western Regions. After excavating a circular footage, the initial support is carried out. The invention adopts explosion-free full-section excavation or backhoe full-section excavation for the conglomerate type V surrounding rock in the Western Region, which has the advantages of fast excavation progress, high efficiency, strong applicability, less human resources input, high safety factor, and low comprehensive cost. .
Owner:SINOHYDRO ENG BUREAU 15
High-speed conglomerate-based tectonic high point offset correction method and device
PendingCN113655525AImprove implementation accuracyPromote reacquaintanceSeismic signal processingConglomerateEngineering
The invention provides a high-speed conglomerate-based tectonic high point offset correction method and device, and the method comprises the steps: building a geologic model which comprises a high-speed conglomerate and a geologic structure according to the pre-recognized underlying geologic structure of the high-speed conglomerate; according to the geometrical relationship of the geologic model, judging whether the high point of the geologic structure deviates or not to generate a judgment result; and generating a velocity field of the geological structure according to the judgment result so as to correct the high point of the structure. According to the high-speed conglomerate-based tectonic high-point offset correction method and device provided by the invention, the implementation precision of the underlying tectonic trap of the high-speed conglomerate is greatly improved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
A method for hydrometallurgy of strongly weathered and strongly oxidized glutenite uranium ore
ActiveCN110438353BReduce manufacturing costEfficient stirring and leachingProcess efficiency improvementPregnant leach solutionSlag
The invention relates to a hydrometallurgy method of strongly weathered and strongly oxidized glutenite uranium ore. Only crushing and sieving processes are used to obtain 1 mm glutenite uranium ore samples, and the leaching test without reagents is carried out on the prepared ore samples, and the uranium content analysis is carried out on the filtrate and tailings, and the leaching rate of liquid meter and slag meter is calculated , using 201×7 resin to recover uranium in the leach solution, using NaCl and H 2 SO 4 Carry out leaching to obtain a qualified solution, and then use flake NaOH to precipitate uranium in the qualified solution to obtain the "111" product, and the precipitation mother solution is recycled to prepare the eluent. The method reduces the ore grinding process, realizes closed-circuit recycling of the process solution, and improves the recovery rate of uranium and the purification degree of products. The use of reagent-free leaching avoids the use of chemical reagents such as sulfuric acid, realizes no waste water discharge, saves costs, and protects the environment.
Owner:中广核铀业新疆发展有限公司 +1
Method and device for determining rock modality
The invention discloses a method and a device for determining a rock modality. The method comprises the steps of: acquiring preset modal parameters of a conglomerate reservoir micro-pore structure and rock pore structure parameters of a typical core rock sample, wherein the preset modal parameters are obtained according to different types of rock modal assumptions in advance; according to a preset correlation, determining target pore structure parameters related to the preset modal parameters, wherein the preset correlation is used for reflecting correlation between the preset modal parameters and the rock pore structure parameters; performing multiple linear regression calculation on the target pore structure parameters and the preset modal parameters to obtain a multiple linear regression equation; and on the basis of the regression result of the multiple linear regression equation, determining the rock modality of the conglomerate reservoir microcosmic pore structure, wherein the rock modality comprises one of a single modality, a double modality and a complex modality. The technical problem that the conglomerate reservoir pore structure modality identification method in the prior art cannot effectively identify the conglomerate reservoir pore structure modality is solved.
Owner:PETROCHINA CO LTD
Pressure prediction method and device for low-permeability glutenite formation
An embodiment of the invention provides a low permeable sandy conglomerate stratum pressure prediction method and an apparatus thereof. The method comprises the following steps of under set pore pressure, acquiring a first longitudinal wave speed of a rock core under each assigned differential stress; under a set differential stress, acquiring a second longitudinal wave speed of the rock core under each assigned pore pressure; acquiring a first rate of change of the first longitudinal wave speed along with the differential stress under the set pore pressure; acquiring a second rate of change of the second longitudinal wave speed along with the pore pressure under the set differential stress; according to the first rate of change and the second rate of change, determining an effective stress coefficient of the rock core; and according to the effective stress coefficient of the rock core, determining stratum pressure of a reservoir stratum corresponding to the rock core. In the embodiment of the invention, low permeable sandy conglomerate stratum pressure prediction accuracy can be increased.
Owner:PETROCHINA CO LTD
Ultra-low permeability tight reservoir fracture-pore type core preparation and saturated oil experiment method
PendingCN114778245ASolve the problem that the experiment cannot be caused by falling offReliable seam making methodPreparing sample for investigationPermeability/surface area analysisTetrafluoroethyleneRock core
The invention relates to an ultra-low permeability tight reservoir fracture-pore type core preparation and saturated oil experiment method which sequentially comprises the following steps: (1) selecting a proper ultra-low permeability tight reservoir core, and performing axial and circumferential treatment; (2) cleaning and drying the rock core; (3) placing the rock core in a middle holder for vacuumizing and saturation; (4) wrapping the saturated rock core by using tetrafluoroethylene heated by a high-temperature drying gun, and forming a crack by using crack forming equipment; (5) the finally obtained rock core is saturated again through the rock core holder, and the liquid phase permeability of the rock core is obtained; and (6) obtaining the matrix saturation and the oil saturation according to the provided calculation formula. According to the method, the difficulty that the core matrix part of the fractured ultra-low permeability tight reservoir core cannot obtain sufficient saturated oil after fracture forming is solved, and a more accurate oil saturation mode and an oil saturation calculation formula of the method are provided for oil field development of fractured glutenite.
Owner:SOUTHWEST PETROLEUM UNIV
Conglomerate pore structure characterization method based on CT three-dimensional data volume
PendingCN113702257ARealize 3D visualizationTrue restorationPermeability/surface area analysisRock microstructureConglomerate
The invention discloses a conglomerate pore structure characterization method based on a CT three-dimensional data volume. The method overcomes the defects of conventional pore structure research, can realize the three-dimensional visualization of a rock microstructure under the condition that a conglomerate sample is not damaged, can truly restore the internal structure of the conglomerate, can better extract the pore structures of micro-cracks and weak structures in the strong-heterogeneity conglomerate, can obtain the more accurate pore structure of the conglomerate, and can reflect the pore structures in the conglomerate more truly.
Owner:SOUTHWEST PETROLEUM UNIV
Impact instability judgment and anti-impact mining method for asymmetric island working face
The invention provides an impact instability judgment method for an asymmetric island working face. The impact instability judgment method comprises the following steps of (S1) obtaining the spatial distribution characteristics of overlying strata of the working face, and revealing the control influence of conglomerate on the movement of the overlying strata on the working face through a micro-seismic monitoring result; (S2) dividing the earth surface into three types of areas, analyzing stress transfer rules of overlying strata in different areas to the island working face, and establishing an average bearing pressure estimation model; and (S3) establishing a relation among the equivalent mining depth, the damage degree of the working face and the average bearing pressure of the working face, and judging the possibility of impact instability of the working face according to the relation. The invention further provides an anti-impact mining method for the asymmetric island working face. According to the method, the asymmetric island working face in the condition of the huge thick conglomerate is used as a research object, and the relation among the equivalent mining depth, the damage degree of the working face and the average bearing pressure is put forward and is used as the basis for judging the danger degree of the working face, so that safe mining of the working face is effectively guaranteed.
Owner:ANHUI UNIV OF SCI & TECH
Evaluation method for conglomerate reservoir in tectonic extrusion area
PendingCN114113095AComprehensiveNo damageMaterial analysis by optical meansPermeability/surface area analysisRock coreWell drilling
Owner:SHENGLI COLLEGE CHINA UNIV OF PETROLEUM
Fluid identification method and device
The invention discloses a fluid identification method and device. Wherein, the method includes: determining the classification critical value of the acid mineral content for classifying the conglomerate reservoir; according to the classification critical value and the acid mineral content in the conglomerate reservoir, classifying the conglomerate reservoir to obtain the conglomerate Reservoir classification results; establish a crossplot of acidic mineral content and resistivity corresponding to the classification results of conglomerate reservoirs; identify the type of fluid in the conglomerate reservoir according to the crossplot of acidic mineral content and resistivity. The invention solves the technical problem in the related art that fluids containing acidic mineral conglomerate cannot be accurately distinguished.
Owner:PETROCHINA CO LTD
Rock fracture testing device and rock fracture testing method
ActiveCN113567255AGood crack testShorten experiment timeClimate change adaptationMaterial strength using tensile/compressive forcesClassical mechanicsConglomerate
The invention provides a rock fracture testing device and a rock fracture testing method. The rock fracture testing device is used for testing a to-be-tested rock, the to-be-tested rock is provided with a preset hole, and the rock fracture testing device comprises: a frame with a space for accommodating the to-be-tested rock; a first force application device, wherein the first force application device is installed in the frame, the first force application device is located in the preset hole under the condition that the to-be-tested rock is placed in the frame, the first force application device comprises a first force application piece, the first force application piece is matched with the hole wall of the preset hole, the to-be-tested rock is provided with a preset crack communicated with the preset hole, the preset hole is rectangular, and the first force application piece abuts against the hole wall, parallel to the length direction of the preset crack, of the preset hole. According to the technical scheme, the problem that the gravel winding and penetrating behaviors of the crack in the conglomerate cannot be visually observed in the prior art is effectively solved.
Owner:PETROCHINA CO LTD
Evaluation method and correction method of conglomerate stratum rock abrasiveness parameter
ActiveCN113009592AEasy to calculateReduce learning costsGeological measurementsConglomerateRock sample
The invention relates to an evaluation method and a correction method of a conglomerate stratum rock abrasiveness parameter. The evaluation method and a correction method comprises the following steps: calculating abrasiveness parameters of a rock sample according to logging data of the rock sample, wherein the logging data comprises density logging data, resistivity logging data, neutron porosity logging data, natural gamma logging data and acoustic logging data. According to the method, density logging information, resistivity logging information, neutron porosity logging information, acoustic logging information and natural gamma logging information are used for directly evaluating the rock abrasiveness parameters of the conglomerate stratum, calculation is easy and convenient, cost is low, and the method has important significance on conglomerate stratum drill bit type selection, efficient rock breaking drilling and cost reduction and efficiency improvement of drilling engineering.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
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