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96 results about "Depositional facies" patented technology
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Method for petrophysical evaluation of shale gas reservoirs
A method for evaluating an earth formation from a well bore, that includes: collecting at least one of geochemical data, petrophysical data and geomechanical data from a wellbore; and identifying depositional facies of the earth surrounding the wellbore. A computer program product and a system are provided.
Owner:BAKER HUGHES INC
Glutenite comprehensive geologic modeling method
The invention provides a glutenite comprehensive geologic modeling method. The method comprises step1, performing analysis and arrangement on drilling well, earthquake, logging and stratigraphic correlation information to screen geologic model basic data; step2, building a stratum and tectonic framework model through single-well fine stratigraphic correlation, fine earthquake explanation and fine inter-bed and fracture system description; step3, recognizing and determining lithologic characteristics; step4, building a sedimentary facies model; step5, building an attribute model through a pore penetration model. By the aid of the method, the lithology identification accuracy is improved, and rapid division of the sedimentary facies is achieved through man-machine interaction.
Owner:CHINA PETROLEUM & CHEM CORP +1
Machine-Learning for Sedimentary Facies Prediction
Using machine learning for sedimentary facies prediction by using one or more logs acquired in a borehole. This includes performing a petrophysical clustering of borehole depths wherein the depths of the borehole are gathered into clusters based on similarities in the one or more logs. Also performed is a log inclusion optimization, including a selection of one or more parameters of the petrophysical clustering, wherein the one or more parameters include a number and / or type of considered logs among the one or more logs and / or a clustering method. Also performed is a classification of the clusters into core depositional facies using one or more predetermined rules.
Owner:SCHLUMBERGER TECH CORP
Method for identifying boundary of sedimentary facies, computer device and computer readable storage medium
ActiveUS20210041588A1Reduce in quantityImprove efficiencyScene recognitionSeismic signal processingAlgorithmEngineering
The present disclosure discloses a method for identifying a boundary of a sedimentary facies, a computer device and a computer readable storage medium. The method comprises: acquiring a preliminary marked result of the sedimentary facies in a seismic attribute map; acquiring a color-based K-means classification result of the seismic attribute map by using a maximal between-cluster variance and a K-means clustering; acquiring a super-pixel classification result of the seismic attribute map according to a SLIC super-pixel segmentation; and performing a region growing fusion on the super-pixel classification result by taking the preliminary marked result and the K-means classification result as constraints, to determine an identification result of the boundary of the sedimentary facies in the seismic attribute map.
Owner:PETROCHINA CO LTD
Sandstone-type uranium mine early exploration rapid area selection method
The invention belongs to the field of sandstone-type uranium ore favorable zone prediction technology research, and particularly relates to a sandstone-type uranium ore early exploration rapid selection method. The method comprises the steps of 1, collecting and arranging research results and regional geological data of a working area, and defining a basin edge uranium-enriched basement and a rockmass distribution range; 2, determining stratum characteristics and uranium-bearing property of the working area, and determining a main ore-bearing target stratum; carrying out favorable sedimentaryfacies belt distribution characteristic research, and accurately positioning the spatial range of favorable mineralization lithology-lithofacies belt; 3, defining a favorable uranium mineralization age, defining ancient landform characteristics of a favorable mineralization period of an ore-bearing target stratum, and defining the distribution position of a sandstone type confluence channel in the working area; and 4, quickly selecting a favorable exploration area.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Sedimentary basin edge strong oil gas reduction area sandstone type uranium mine distant view evaluation method
PendingCN112464456AReduction quantificationDesign optimisation/simulationSpecial data processing applicationsMining engineeringUranium mine
The invention belongs to the technical field of uranium mine exploration, and particularly relates to a sedimentary basin edge strong oil and gas reduction area sandstone type uranium mine distant view evaluation method, which comprises the steps of 1, establishing a stratum table; 2, screening a uranium mineralization target layer; 3, delineating a sandstone-type uranium mine distant view evaluation area range; 4, determining a sandstone type uranium mineralization period; 5, determining the time of first large-scale oil gas spill in the sandstone-type uranium mine distant view evaluation area range; 6, compiling a sedimentary facies diagram of a uranium mineralization target layer in the sandstone-type uranium mine distant view evaluation area; and 7, establishing a sandstone-type uranium mine distant view evaluation model of the basin edge strong oil and gas reduction area of the sedimentary basin. According to the method, factors such as stratums, unconformity surfaces, oil-gas reduction, paleooxidation and sedimentary facies are integrated, the sandstone-type uranium ore distant view of the basin edge strong oil-gas reduction area of the sedimentary basin can be quantitativelyevaluated, and evaluation parameters are provided for sandstone-type uranium ore exploration of the area.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Preparation method of graphene oxide-aluminum-molybdenum trioxide ternary nano-composite energy-containing film
The invention relates to a preparation method of a graphene oxide-aluminum-molybdenum trioxide ternary nano-composite energy-containing film. At present, the achievement of the aim on quickly and high-efficiently assembling a multi-component thin film with high heat release in a low-cost way faces the challenge. The preparation method comprises the steps of adopting nano-aluminum powder, grapheneoxide and nano-molybdenum trioxide as depositional facies, and polymine as an additive; and adopting an electrophoretic deposition method to obtain the GO / Al / MoO3 ternary nano-composite energy-containing film. The GO / Al / MoO3 ternary nano-composite energy-containing film prepared through the invention is good in dispersibility, compact in film, and excellent in heat release performance and combustion performance. The preparation method provided by the invention not only can be used for preparing the GO / Al / MoO3 ternary nano-composite energy-containing film, but also can be used for preparing a composite film with multiple particles. The preparation method provided by the invention is simple in process short in period, low in production cost, and suitable for industrial large-scale production.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD
Geologic model establishing method for gas injection development oil reservoirs
ActiveCN110838175AAvoid the problem of lagging development, optimization and adjustmentClimate change adaptationOther databases indexingMining engineeringAssise
The invention discloses a geologic model establishing method of a gas injection development oil reservoir, which comprises the following steps: collecting oil reservoir basic data, and establishing abasic database; assigning depth values to the upper and lower fault data of the target interval, and establishing a fault model; generating a three-dimensional skeleton grid; utilizing geological stratification data to establish a layer model; extracting further subdivision of each small layer unit from the reservoir fine division data, determining each rhythm section, forming well point fine description reservoir data, and obtaining a stratum division minimum unit stratum framework model; defining a lithologic value between two rhythm section levels to obtain a reservoir framework model; establishing a sedimentary facies model on the basis of a reservoir framework model, and then establishing a phased reservoir parameter model. The method is used for solving the problem that in the priorart, due to limitation of a geologic model, development optimization adjustment of the gas injection exploitation oil reservoir is delayed, a special geologic model building method is provided for gasinjection exploitation of the oil reservoir, and the purpose of making an overall scheme plan in the earlier stage of development is facilitated.
Owner:CHENGDU NORTH OIL EXPLORATION DEV TECH
Earthquake strong shielding time-frequency information extraction and stripping method based on phase control
The invention provides an earthquake strong shielding time-frequency information extraction and stripping method based on phase control. The method comprises the following steps: 1, performing well-to-earthquake calibration and horizon tracking on earthquake data; 2, performing logging facies and near-well seismic facies analysis on a typical well, and roughly dividing a phase zone; 3, extractingseismic attributes from determined horizon upper and lower time window ranges, screening characteristic attributes with good performance for combinatorial analysis, and determining an accurate sedimentary facies strip graph; 4, performing generalized S transformation on the seismic data of a target processing layer to extract algorithm parameters; 5, determining variable wavelet information participating in the algorithm; and step 6, matching the optimal wavelet according to the multiphase band waveform characteristics to carry out strong layer stripping. The earthquake strong shielding time-frequency information extraction and stripping method based on phase control can provide shielding removal data for subsequent attribute extraction, oil and gas reservoir identification and reservoir prediction, so that the identification and exploration and development capability of a beach and dam sand weak signal layer is improved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for petrophysical evaluation of shale gas reservoirs
A method for evaluating an earth formation from a well bore, that includes: collecting at least one of geochemical data, petrophysical data and geomechanical data from a wellbore; and identifying depositional facies of the earth surrounding the wellbore. A computer program product and a system are provided.
Owner:BAKER HUGHES INC
Method for determining lithogenous phase boundary point of carbonate reservoir stratum
ActiveCN108344855AEffective reservoir space distributionEarth material testingGeomorphologyReservoir evaluation
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.
Owner:YANGTZE UNIVERSITY
Method for evaluating fracturing fracture by using interference well testing theory
Owner:DAQING OILFIELD CO LTD +1
Well-to-seismic multistage constrained glutenite fan body sedimentary facies zone fine division method
ActiveCN111175819AHigh precision of phase band identificationAvoid time problemsSeismic signal processingSeismology for water-loggingWell loggingSequence model
The invention provides a well-to-seismic multistage constrained glutenite sector sedimentary facies zone fine division method. The method comprises the following steps: counting lithological speeds and densities of glutenite sectors in different facies zones, establishing a forward modeling model, and carrying out seismic facies analysis on the glutenite sector forward modeling model; establishinga glutenite sector period sequence interface; determining seismic facies as a primary constraint condition; determining a logging sensitive curve as a secondary constraint condition; according to theglutenite body period sequence interface tracked in the step 1, establishing a glutenite body structure period sequence model; analyzing a variation function, and determining spatial structure parameters of variables; and outputting a simulation result, and performing plane attribute extraction along the glutenite body period sequence interface tracked in the step 1 to realize the well-to-seismicmultistage constraint phase zone division of sedimentary subfacies and sedimentary microfacies of the glutenite body. According to the well-to-seismic multistage constrained glutenite sector sedimentary facies zone fine division method, the numerical simulation is carried out under a geological model of fine period sequence division and structural period modeling, and the glutenite sedimentary body well-to-seismic numerical simulation sedimentary facies zone fine division is achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Carbonate reservoir sedimentary facies identification method and device, electronic equipment and medium
The invention discloses a carbonate reservoir sedimentary facies identification method and device, electronic equipment and a medium. The method comprises the following steps: dividing a reservoir into a plurality of sedimentary facies, and preprocessing logging data to obtain preprocessed logging data; establishing a standard training library according to the preprocessed logging data of the plurality of sedimentary facies; constructing a long-short-term memory neural network model, and setting initial parameters of a neural network; inputting the samples of the standard training library into the long and short term memory neural network model for learning and training, and adjusting neural network parameters to obtain a final long and short term memory neural network model; and inputting the preprocessed logging data of the target well into the final long-short term memory neural network model, and predicting the reservoir sedimentary facies type of the target well. The method for automatically dividing the reservoir sedimentary facies is achieved through the long and short term memory network, the automatic recognition precision is high, the manual workload can be reduced, and the working efficiency can be improved.
Owner:CHINA PETROLEUM & CHEM CORP +1
A method for locating favorable ore-forming lithofacies belts in sandstone-type uranium deposits
ActiveCN109270589BTo achieve the purpose of plane recognitionPracticalGeological measurementsMetallogenyUranium mine
The invention belongs to the technical field of sandstone-type uranium mine mineralization prediction, and relates to a sandstone-type uranium mine favorable mineralization lithofacies belt positioning method. The method includes the following steps that: step 1, regional geological data are collected, and a sandstone-type uranium mine uranium-prospecting key area and target horizon are determined; step 2, the sedimentary facies type and spatial distribution characteristics of the key area and the target horizon in the step 1 are sorted; and step 3, the sedimentary facies belt of favorable uranium mineralization is delineated qualitatively and quantitatively on the basis of a uranium-bearing stratum structure, sand body physical properties, lithological combinations, paleoclimate, oxidizing zone developmental conditions and uranium-bearing geological conditions.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Well-to-seismic collaborative sedimentary microfacies division method based on high-precision sequence framework model
ActiveCN112505754AImprove efficiencyPrediction results are stableSeismic signal processingSeismic attributeAssise
The invention discloses a well-to-seismic collaborative sedimentary microfacies division method based on a high-precision sequence framework model, and the method comprises the steps: building a matching relation of well-to-seismic sedimentary facies features based on the lithologic combination of a stratum under a high-precision sequence stratum shelf and the seismic response features of sedimentary body cycle features, and optimizing the seismic attributes sensitive to the types of stratum sedimentary facies; and establishing a three-dimensional data volume for researching sedimentary subfacies and microfacies of a target layer through well-to-seismic collaborative simulation. And verifying the reliability and accuracy of the sedimentary facies three-dimensional data volume through a phase sequence rule, and finally obtaining a sedimentary facies division result suitable for industrial standards. According to the three-dimensional data volume of the sedimentary microfacies, the working efficiency of sedimentary facies division can be greatly improved, the transverse resolution and the longitudinal resolution are high, and the determinacy and the reliability of sedimentary microfacies fine division results are higher.
Owner:中国石油集团工程咨询有限责任公司
Multi-working-face goaf water inflow while-mining refined prediction method
The invention relates to a method for predicting water inflow, belongs to the technical field of coal, and particularly relates to a multi-working-face goaf water inflow while-mining refined prediction method. According to the invention, stratum deposition rules and sedimentary facies characteristics of stratum are combined, aquifer permeability coefficient partitions are divided, a multi-working-face continuous mining boundary condition refined generalization method based on time, space and water level is provided, a three-dimensional hydrogeological conceptual model and a numerical model ofa research area are established, and the multi-working-face goaf water inflow is predicted in a refined mode. By means of the method, the generalization method of the multi-working-face continuous stopping boundary conditions and the multi-working-face goaf water inflow while-mining continuous fine prediction numerical method are perfected, the water inflow prediction result better conforms to theactual on-site water inflow, and the multi-working-face goaf water inflow prediction precision is improved.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Teaching demonstration device for turbidity sediment experiment and teaching method of teaching demonstration device
The invention provides a teaching demonstration device for a turbidity sediment experiment and a teaching method of the teaching demonstration device, and relates to an experimental demonstration device. A water tank body comprises water tanks A (6) and water tanks B (9) which are arranged oppositely in the vertical direction. According to the teaching demonstration device for the turbidity sediment experiment, four blending formulas for water, mud and sand content of sedimentary turbidity current are provided according to the characteristics of four types of sedimentary turbidity current including gravel-rich type sedimentary turbidity current, sand-rich type sedimentary turbidity current, sand-mud mixed type sedimentary turbidity current and mud-rich type sedimentary turbidity current, the geological characteristics of each geologic sedimentary turbidity current are distinguished in a refined manner, the movement characteristics of each type of sedimentary turbidity current are comparatively demonstrated by the two water tanks with adjustable slope, the turbidity current flow rate is adjusted according to size and length of the slope, then sediment discharge in the turbidity current is observed, the geological knowledge of turbidity sediment is obtained, strictness and completeness of experimental operation are guaranteed, and students are helped to master the geological turbidity sediment related knowledge comprehensively and finely.
Owner:YANGTZE UNIVERSITY
Non-dominant facies mapping method for sedimentary facies
ActiveCN108875258AThe scope of the spread is objectiveIn line with geological lawsDesign optimisation/simulationSpecial data processing applicationsGeophysicsPetrology
The invention provides a non-dominant facies mapping method for a sedimentary facies. The method comprises (1) identifying a main force microfacies and an non-main force microfacies in the formation to be mapped to obtain a dominant sedimentary facies and a non-dominant sedimentary facies of the formation units to be mapped; (2) carrying out a sub-segment division for the obtained the dominant sedimentary facies and the non-dominant sedimentary facies, so that each sub-segment represents one or one stage sedimentary microfacies; (3) distinguishing the dominant sedimentary facies and the non-dominant sedimentary facies types of all sub-sections of a single well to obtain the types of all the dominant sedimentary facies and the non-dominant sedimentary facies; 4)determining a combination principle of the dominant sedimentary facies and the non-dominant sedimentary facies, and performing sedimentary facies spatial combination on the dominant sedimentary facies and the non-dominant sedimentary facies; 5)and compiling a profile phase diagram according to the obtained types of all the dominant sedimentary facies and the non-dominant sedimentary facies and the determined combination principle of the dominant sedimentary facies and the non-dominant sedimentary facies to obtain the sedimentary facies mapping results considering the non-dominant facies. The method can be widely applied to the field of sedimentary facies mapping.
Owner:CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
Method and device for constructing horizontal well trajectory
ActiveCN111140230ASolve the phenomenon of low efficiency and invalid cycleSurveyClimate change adaptationLithologyHorizontal wells
The invention discloses a method and device for constructing a horizontal well trajectory, and relates to the field of oil reservoir engineering. The method for constructing the horizontal well trajectory comprises the steps that a deposition phase band diagram, reservoir lithology and physical property modeling results and a three-dimensional residual oil distribution result are obtained; by using the deposition phase band diagram, the reservoir lithology and physical property modeling results and the three-dimensional residual oil distribution results, the horizontal well trajectory is builtin a transverse-cut river way mode based on a preset rule, wherein a transverse-cut river way is in the direction of a vertical river way and penetrates through an oil reservoir between interlayers.The method and device solve the problems that for a thick reservoir with conspicuous plane and interlayer conflicts, the low-efficiency and inefficient circulation phenomenon is prominent, vertical well digging difficulty is large, and the economic benefit of a conventional horizontal well along the river way is poor.
Owner:DAQING OILFIELD CO LTD +1
Method and system for predicting under-salt lake facies limestone reservoir under condition of few wells
ActiveCN111983683AAvoid ambiguityIn line with geological characteristicsSeismic signal processingSalt lakeLongitudinal wave
The invention relates to an under-salt lake facies limestone reservoir prediction method and system under the condition of few wells, and the method comprises the steps: obtaining post-stack seismic data, carrying out the time depth calibration through combining with drilling information, dividing an under-salt lake facies limestone reservoir into an isochronous interface and a secondary isochronous interface, and constructing a stratum position frame through the isochronous interface and the secondary isochronous interface; seismic attributes are calculated, facies zone division of subsalt lake facies limestone reservoir sedimentary facies is carried out based on the seismic attributes and the sequence interface body, and a plurality of virtual well points are arranged on different facieszones; extracting a longitudinal wave speed of the virtual well point, establishing a nonlinear mapping relationship from the longitudinal wave speed to a transverse wave speed and a density parameter by utilizing a BP neural network, calculating the transverse wave speed and the density parameter according to the nonlinear mapping relationship, generating a model data body in combination with astratigraphic horizon framework, and performing low-pass filtering on the model data body to obtain a low-frequency model; and inverting the model to obtain a limestone reservoir structure. Accordingto the method, the multiplicity of solutions caused by manual interpretation of a sequence interface is avoided, the established low-frequency model better conforms to the geological characteristics of lacustrine limestone, and the reliability of an inversion result is higher.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Phase control karst type fracture-cavity assembly depicting method and device
PendingCN112379435AAchieve fine characterizationImprove responsivenessSeismic signal processingSeismology for water-loggingWell loggingKarst
The invention provides a phased karst type fracture-cavity assembly depicting method and device, and the method comprises the steps: carrying out the plane prediction of a sedimentary facies type according to logging data of a target reservoir, and obtaining a sedimentary facies plane graph of the target reservoir; decomposing the pre-stack migration seismic data of the target reservoir by using wavelet transform to obtain a plurality of frequency division bodies; taking the sedimentary facies planar graph of the target reservoir as a constraint, and selecting a low-frequency end data volume from the plurality of frequency division bodies; reconstructing pre-stack migration seismic data according to the low-frequency end data volume to obtain a reconstructed seismic data volume; extractingan amplitude difference attribute body and a texture variance attribute body from the reconstructed seismic data volume; and fusing the amplitude difference attribute body and the texture variance attribute body by using a two-dimensional color table to obtain a three-dimensional depiction of the phased karst type fracture-cavity assembly. Through seismic means such as phase control, frequency division, reconstruction, fusion and the like, fine depiction of a small-scale phase control karst type hole assembly is gradually and indirectly realized.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Quantitative characterization method and system for sedimentary facies evolution based on geology and geophysics
The invention belongs to the field of quantitative characterization of sedimentary facies, particularly relates to a quantitative characterization method and system for sedimentary facies evolution based on geology and geophysics. The invention aims to solve the problem that quantitative characterization of sedimentary facies evolution cannot be systematically and systematically realized by utilizing a geophysics technology under the constraint of a geological model in the prior art. The method comprises the following steps: establishing a high-resolution sequence stratigraphic frame by using a core sample, a logging data body and an earthquake data body, and acquiring a three-dimensional sequence interface on an earthquake data volume; acquiring an approximate ancient landform map of a sedimentary period through combination with a travel time difference representing the terrain height of the sedimentary period; with the high-resolution sequence stratigraphic frame as a model, carrying out logging-seismic combined wave impedance inversion; carrying out stratigraphic slice attribute analysis on a wave resistance body; establishing a sand-to-ground ratio-wave impedance mapping relation; and dynamically and quantitatively representing a sedimentary facies evolution process based on the sand-to-ground ratio-wave impedance mapping relation. According to the method, the dynamic and quantitative characterization of the sedimentary facies evolution process in the high-resolution sequence stratigraphic frame can be realized.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Method for predicting distribution of thin reservoir of platform beach under constraint of sequence framework
PendingCN114690271AAchieve forecastRealize evaluationGeological measurementsRock corePredictive methods
The invention provides a prediction method for thin reservoir distribution of a platform land beach under constraint of a sequence framework, which comprises the following steps of: (1) observing and sampling a rock core, and grinding rock slices; (2) core homing is carried out, and a standard well sequence stratum is established; (3) respectively establishing a transverse sequence framework and a longitudinal sequence framework, and determining sequence stratum characteristics of a target layer; (4) determining the sedimentary facies type, and establishing a sedimentary combination sequence; (5) reservoir formation causes corresponding to the isochronous geologic body are analyzed; (6) analyzing a control mechanism, and judging the exposure time of the particle beach in the reservoir; (7) judging whether the relationship between the thickness of the isochronous geologic body and the accumulated thickness of the reservoir is a positive correlation; (8) establishing a relation curve between the thickness of the isochronous geologic body and the productivity of the reservoir; and (9) predicting the most favorable reservoir region, the secondary favorable reservoir region and the general reservoir region. The method realizes prediction and evaluation of unknown geologic body reservoirs, and has guiding significance for favorable area screening, well location deployment and the like.
Owner:SOUTHWEST PETROLEUM UNIV
A method for identification of channel sand bodies
The invention discloses a river sand identification method, and belongs to the field of oil field reservoir stratum prediction. The method comprises that earthquake collection is carried out on a target work area containing river sand, earthquake data is obtained, and logging is carried out in the target work area to obtain logging data; the earthquake horizon is interpreted by means of the earthquake data, and the sand thickness, sedimentary facies and exploitation horizons are interpreted by means of the logging data; well-earthquake calibration is carried out by using the earthquake horizon, sand thickness, sedimentary facies and exploitation horizons, and a well-earthquake calibration result is obtained; spatial horizons of a sand group, a little layer and a sedimentary unit in the time domain are established according to the well-earthquake calibration result; the type of the sedimentary facies is obtained, the spatial horizons of the sand group, little layer and sedimentary unitare vertically combined according to the type of the sedimentary facies, and a framework model is obtained; and distribution characteristic of the river sand in the target work area is identified viathe framework model. Thus, the distribution characteristic of river sand in different thicknesses can be identified more accurately.
Owner:PETROCHINA CO LTD +1
Saturation modeling method with equivalent J function constraint
ActiveCN111550238ALess adjustment workFast modelingDesign optimisation/simulationBorehole/well accessoriesWell loggingOil water
The invention discloses a saturation modeling method with equivalent J function constraint. The saturation modeling method with the equivalent J function constraint comprises the following steps of 1)establishing a sedimentary microfacies model, a porosity model and a permeability model of a target work area; 2) establishing a height model above an oil-water interface according to the oil-water interface; 3) establishing an equivalent J function model; 4) generating a height logging curve above the oil-water interface of each single well in the target working area; 5) generating an equivalentvariable curve of different sedimentary facies; 6) establishing an intersection graph of the equivalent variable curve and a logging water saturation curve under different sedimentary facies conditions, and establishing a linear fitting distribution function; 7) converting the equivalent J function model generated in the step 3) into a fitted water saturation geological model; 8) establishing anoil-containing boundary model; and 9) obtaining a water saturation model after boundary constraint, further obtaining an oil saturation model of the target work area, and obtaining a geological modelof the original oil saturation of the oil reservoir.
Owner:PETROCHINA CO LTD
Lithologic trap depicting method
ActiveCN111505720AAccurate portrayalSeismic signal processingSeismology for water-loggingGeophysicsDepositional facies
The invention discloses a lithologic trap depicting method, and belongs to the technical field of oil and gas exploration, and the lithologic trap depicting method comprises the following steps: S1, selecting data capable of meeting lithologic trap depicting requirements; S2, identifying a dominant sedimentary facies belt; S3, recognizing the type of the slope folding belt and the distribution range of the slope folding belt, and determining favorable sand body distribution based on the slope folding belt; S4, carrying out quantitative depiction on the favorable sand body distribution to complete depiction of the lithologic trap. According to the method, the lithologic trap of the offshore middle-deep layer can be quantitatively depicted, and a technical basis is provided for lithologic exploration.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Platform-terrace facies thick-layer limestone sedimentary facies depicting and predicting system and predicting method
ActiveCN114114396AEffective fine characterization of sedimentary microfaciesEffective fine characterizationSeismic signal processingLithologyRock core
The invention provides a platform facies thick layer limestone sedimentary facies depicting and predicting system and method. The platform facies thick layer limestone sedimentary facies depicting and predicting system comprises a single well relative dominant facies determining module, a multi-attribute fusion seismic facies predicting module and a seismic facies predicting module. The single well relative dominant facies determination module comprises a single well sedimentary microfacies identification module and a single well relative dominant facies determination module; and the single well sedimentary microfacies identification module is used for dividing sedimentary microfacies on a single well by inputting and observing related information of sedimentary microfacies types in a limestone sedimentary system determined by rock cores, rock slices and ancient biomarkers and combining well logging interpretation with a facies law. And the type of the sedimentary microfacies in the layer is analyzed, and the relative proportion of the thickness of the beach facies and the thickness of the non-beach facies (the sedimentary microfacies except the beach) on the single well is calculated. According to the method, the problems that quantitative analysis cannot be realized and multiple solutions exist in sedimentary microfacies prediction in a reservoir with relatively small lithology change are solved.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
Method and device for compiling black shale quantitative paleo-geographic map
PendingCN111292385ASolve technical problems with low accuracyImprove accuracy2D-image generationGeographical information databasesGeophysicsDetritus
The embodiment of the invention provides a method and device for compiling a black shale quantitative paleo-geographic map, and the method comprises the steps: analyzing the causes of all material components in a black shale sample, and determining the material components of land source debris as a single factor; compiling a map for each single factor; for each single factor, determining a sedimentary facies mode of the single factor according to the map of the single factor, the geodetic structure background of the black shale sample and the sedimentary characteristics of the black shale sample, and determining a microfacies division rule for each sedimentary facies mode; and according to the map of each single factor and the microfacies division rule, compiling an ancient geographic mapaccording to the layer sections. According to the scheme, the substance components of the terrestrial debris are determined as the single factors, and the ancient geographic map is compiled accordingto the layer sections according to the map of each single factor and the microfacies division rule, so that the accuracy of the black shale quantitative ancient geographic map is improved, and a basisis provided for clarification of black shale distribution and sedimentary facies distribution and optimization of favorable zones and targets.
Owner:PETROCHINA CO LTD
A Method for Identifying Ineffective Circulation in Oilfield Injection-production Relationship
ActiveCN106593409BComprehensive identification of invalid cyclesLow recognition accuracySurveySoil scienceWell logging
The invention discloses a recognition method for futile cycle in an oilfield injection-production relation. The recognition method is characterized by comprising the following steps: static recognition of futile cycle, recognition of a well logging curve, and dynamic recognition of futile cycle. The step of static recognition of the futile cycle further comprises the following substeps: selection of injection-production well groups and selection of sedimentary facies types. The step of recognition of the well logging curve further comprises the following substeps: division of thick and thin oil layers, selection of water-out interpretation results, and recognition of the well logging curve. In the method, various data including fine geology research achievements, profile testing, well logging interpretation and the like are comprehensively utilized, distribution conditions of futile cycle fields are clear and definite, field tests are carried out, good effects are achieved, and reliable basis is provided for followed-up water-flooding development.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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