43 results about "Diagenesis" patented technology

The invention discloses a method for analyzing diagenesis of clay minerals by combining physical simulation and numerical simulation, which comprises the following steps: selecting clay single minerals, and preparing a formation water solution; respectively filling the clay single mineral and the stratum water solution into a plurality of reaction kettles, and carrying out diagenesis physical simulation; establishing a numerical simulation model with the same physical simulation experiment condition, and outputting mineral and ion data; according to mineral and ion data, fitting a physical simulation experiment result and a numerical simulation result, and determining a mineral corrosion rate; and establishing a geologic model by taking the mineral dissolution rate as a reference, and performing clay single mineral diagenesis simulation within a geological time scale. According to the method, numerical simulation parameters are constrained by physical simulation experiment results, and comparison and verification of numerical simulation and physical simulation results are realized by adjusting mineral corrosion kinetic parameters in real time, so that the numerical simulation experiment results are close to actual conditions.

The application discloses a kind of cross-tectonic period diagenesis simulation device and method.The device includes fluid driving system, reaction solution supply system and at least two groups of tectonic period reaction system connected in sequence, and different reaction systems are used to simulate the temperature and pressure conditions when geological fluid passes through each target layer during cross-tectonic period.The method first restores the geological conditions when geological fluid passes through each target layer during cross-tectonic period according to petrology and geochemistry analysis, combined with tectonic evolution history, burial history and fluid injection history, establishes cross-tectonic period diagenesis model, determines geological fluid type, and then determines the process of geological stress driving high-pressure layer fluid to migrate to low-pressure layer, restores the geological conditions when geological fluid passes through each target layer during cross-tectonic period;According to the restored geological process and geological conditions, the forward simulation of fluid dissolution, cementation, metasomatism and other diagenesis during cross-tectonic period is carried out by using cross-tectonic period diagenesis simulation device.Provide basis for judging the diagenetic mechanism of reservoir rock after high temperature and high pressure and multi-stage tectonic evolution.

The invention provides an earthquake quantitative prediction method for the compaction effect intensity of carbonate rocks, and the method comprises the following steps: (1) carrying out the statistics and analysis of logging data and core analysis data of a compacted stratum in a to-be-analyzed region, and building a fitting relation between the apparent compaction rate and the longitudinal wave speed; (2) performing phase-control frequency-division inversion in combination with the seismic response characteristics, and then calculating and analyzing the actual longitudinal wave speed of the to-be-analyzed region; and (3) determining the distribution of the apparent compaction rate according to the fitting relation between the apparent compaction rate and the longitudinal wave speed obtained in the step (1) and the actual longitudinal wave speed obtained in the step (2). According to the carbonate rock diagenesis strength earthquake prediction method based on the apparent compaction rate, the problem that quantitative prediction of the carbonate rock compaction strength is difficult is solved, the distribution characteristics of different compaction strength in space are defined, and the exploration and development success rate can be improved.

Systems and methods for determining a diagenesis level in a reservoir for performing hydrocarbon extraction include receiving a set of open hole (OH) log data from one or more wells in the reservoir, the OH log data representing a subsurface of the reservoir; executing a diagenesis model to process the set of OH log data, the diagenesis model trained by thin-section image data correlated to labeled OH log data, the labeling identifying values for a quartz overgrowth rate (QOR), a clay coating rate (CCR), or a thin-section porosity in the subsurface based on a value in the OH log data; determining a prediction of a porosity of the reservoir, a permeability of the reservoir, or both the porosity and the permeability; and generating a control signal representing a recommendation to drill a well at a location in the reservoir.

The invention belongs to the technical field of oil and gas reservoir rock data identification, and particularly relates to a three-dimensional multi-mineral digital core modeling method. According to the method, a 2D-3DGAN algorithm is provided, a three-dimensional data volume can be generated only by using a single two-dimensional picture, the advantages of a 2D-3DGAN method and an AMICS method are combined, a modeling method of 'AMICS + 2D-3DGAN' is provided to establish a multi-mineral, high-precision and efficient three-dimensional multi-mineral digital core, the representative two-dimensional ore scanning image is obtained by using the 2D-3DGAN method, and the three-dimensional data volume can be generated only by using a single two-dimensional picture. And generating a three-dimensional multi-mineral digital image by using the obtained two-dimensional mine scanning image as a training image. The built model not only contains multiple minerals, but also gives consideration to accuracy and economical efficiency, can represent reservoir rocks, and provides a firm basis for subsequent diagenesis simulation based on multi-mineral digital cores and research on electrical, acoustic and mechanical properties of reservoirs.

The invention provides a sedimentary diagenesis facies seismic geology combined prediction method. The prediction method comprises the steps that S1, reservoir parameters and reservoir diagenesis facies types corresponding to reservoir core slices are determined; s2, determining pore structure types of multiple types of lithogenous phases; s3, classifying the sedimentary diagenetic facies, and dividing the sedimentary diagenetic facies into favorable sedimentary diagenetic facies and secondary favorable sedimentary diagenetic facies; s4, establishing a linear multivariate discriminant function of the sedimentary lithogenous phase; s5, determining the distribution characteristics of the sedimentary diagenesis facies on the single well; s6, rock physical elastic parameters of various wells are calculated; step S7, screening sensitive elastic parameters capable of distinguishing favorable sedimentary diagenesis phases and secondary favorable sedimentary diagenesis phases; and S8, determining the spatial distribution range of the favorable sedimentary lithogenous phase and the secondary favorable sedimentary lithogenous phase. And a foundation is laid for application of sedimentary diagenesis phase distribution characteristics in oil-gas exploration.

The invention discloses an anisotropic large-size artificial rock core preparation device and method. The device comprises a forming system used for providing a rock core forming environment, an axial pressure loading system used for simulating rock core stratum axial pressure, a confining pressure loading system used for simulating rock core stratum confining pressure, a pore pressure loading system used for simulating rock core stratum pore pressure and a heating system used for simulating rock core stratum temperature. The collecting and metering system is used for collecting discharged pore pressure fluid and respectively metering a gas phase and a liquid phase, the data acquisition system can acquire various information during preparation, and the control system is used for controlling the systems to work according to data fed back by the data acquisition system so as to simulate the diagenesis process of natural rock and recording and analyzing the data. According to the invention, a coupling environment of a real rock diagenesis process can be simulated, and anisotropy and reservoir heterogeneity can be simulated.

A chlorite growth process reconstruction method relates to the technical field of geological exploration, and mainly comprises the following steps: collecting well drilling core sample analysis related data, and preparing rock slices; analyzing the relationship between different deposition periods and environmental conditions and chlorite generation and growth; representing the composition and content of chlorite and other minerals in the rock slice; establishing the relationship between chlorite components and diagenesis evolution stages; collecting rock core sample diagenesis environment sediment samples; the method comprises the following steps: evaluating the influence of organic matters in sediments on chlorite formation, performing multi-scale coupling numerical simulation modeling, establishing a chlorite growth model, and reconstructing a chlorite growth process by using the chlorite growth model; according to the method, core sample analysis, sedimentary environment parameters and multi-scale coupling numerical simulation are comprehensively combined, so that growth evolution of chlorite in each diagenesis stage is clearly reconstructed, and a more accurate and reliable chlorite growth process is obtained.

Systems and methods for determining a diagenesis level in a reservoir for performing hydrocarbon extraction include receiving a set of open hole (OH) log data from one or more wells in the reservoir, the OH log data representing a subsurface of the reservoir; executing a diagenesis model to process the set of OH log data, the diagenesis model trained by thin-section image data correlated to labeled OH log data, the labeling identifying values for a quartz overgrowth rate (QOR), a clay coating rate (CCR), or a thin-section porosity in the subsurface based on a value in the OH log data; determining a prediction of a porosity of the reservoir, a permeability of the reservoir, or both the porosity and the permeability; and generating a control signal representing a recommendation to drill a well at a location in the reservoir.

The invention provides an intelligent sandstone slice identification system and an intelligent sandstone slice identification method, and belongs to the technical field of geological exploration. In the system, a data analysis module integrates three core algorithms: a data enhancement module adopts an improved conditional cycle consistency generative adversarial network to solve the problem of scarcity of rock samples; the multi-modal feature understanding module fuses image visual features and petrology text features by using a cross-modal attention mechanism; and the intelligent identification module completes recognition and classification of mineral composition, structure construction and diagenesis in parallel based on a multi-task learning architecture. The method comprises a system training stage and a sample identification stage. According to the method, the model generalization ability is improved by generating a large number of synthetic samples, the geological rationality of the identification result is enhanced through multi-modal semantic fusion, efficient, accurate and objective automatic intelligent identification of the sandstone slice is realized, and a key technical support is provided for reservoir evaluation in the field of petroleum geology.

The invention provides an iron-sulfur isotope equilibrium fractionation factor calculation method based on a density functional theory. The iron-sulfur isotope equilibrium fractionation factor calculation method comprises the following steps: firstly, constructing initial mineral models of amorphous FeS, cubic FeS, maquinol ore, hematite, hematite and pyrite; the model is optimized through a spin polarization DFT + U method, GGA-PBE functional, OTFG ultra-soft pseudo potential, 400 eV plane wave cutoff energy and 5.0 * 10 <-7 > Hartree self-consistent field convergence standards are selected as calculation parameters, and the optimal Hubbar Ueff value and magnetic sequence arrangement of each mineral are determined; and finally, calculating the simple harmonic vibration frequency of the mineral, and deducing equilibrium fractionation factors (1000ln beta value) of Fe and S isotopes at a specific temperature. According to the method, the theoretical blank of isotope fractionation of the conversion path from amorphous FeS to pyrite is filled up, the data can be used for judging the isotope balance of minerals and tracing the mineralization process, and an important theoretical basis is provided for research on sedimentary diagenesis and ancient ocean redox.

The application discloses a geothermal caprock multi-factor coupling evaluation system, which aims to solve the problems of low standardization degree of existing evaluation manual operation process, lack of unified engineering architecture of multi-factor coupling and insufficient result visualization. The application automatically executes caprock comprehensive evaluation on a unified platform through a data acquisition module, a single-factor evaluation module, a coupling model construction module, a coupling score calculation module, a comprehensive evaluation module and a result output module. The system completes single-factor scoring based on basic data, constructs and calculates the scores of four coupling subsystems of lithology-diagenesis-physical property, structure-mechanics-integrity, thickness-continuity and fluid-pressure-temperature, quantifies the coupling relationship between the subsystems by using a cross influence matrix to obtain the final score, and outputs the comprehensive score and the visualized result after weighting. The application realizes the integration and automation of the evaluation process, supports the engineering landing of complex coupling models, and improves the result visualization and decision support capability.

The present invention belongs to the field of coal mine water conservation and disaster reduction control, specifically a method for water conservation and disaster reduction of calcified induced diagenesis in the Quaternary loose layer; according to the impact range of underground coal mining on the Quaternary loose layer, the calcified water solution recharge drilling holes and the effect observation drilling holes are reasonably arranged; according to the ion composition and content of the water body stored in the Quaternary loose layer, a reagent aqueous solution of appropriate concentration is prepared; the calcium carbonate precipitation generated by the chemical reaction of groundwater and the calcified water solution is used to reinforce the loose sand / soil particles, promote the diagenesis of the sand / soil body in the corresponding area, and finally form a whole with a certain bearing capacity, prevent the large-scale transmission of the loose layer load, and prevent the occurrence of composite fractures in the key layer, thereby achieving the purpose of groundwater protection and geological disaster prevention and control. The present invention can provide guarantees for water conservation mining and strong mine pressure control in mining areas with thick loose layers and thin bedrock. Its implementation method is simple, safe, environmentally friendly, and highly reliable.

The invention provides an identification method for late formed rock corrosion of carbonate rocks. The method comprises the following steps: collecting a sampling sample from an underground rock core and a field outcrop sample; performing first observation treatment on the sampled sample to establish a sedimentary-diagenesis sequence, and preliminarily determining the type of the late diagenesis corrosion hole; performing second observation treatment on the sampled sample to identify the hydrocarbon inclusion state of the sampled sample; performing third observation treatment on the sampled sample to identify the uniform temperature and freezing point temperature of the gas-liquid two-phase fluid inclusion in the sampled sample; determining the content of main trace elements in the sampled sample; measuring the carbon and oxygen isotope value of the sampled sample; according to the sedimentary-diagenesis sequence, the type of the corrosion hole, the state of the hydrocarbon inclusion, the uniform temperature and freezing point temperature of the gas-liquid two-phase fluid inclusion, the content of main trace elements and the carbon and oxygen isotope value, the identification basis of late diagenesis corrosion of the carbonate rock is determined; the method is used for achieving the effect of improving the carbonate rock late formation rock corrosion identification efficiency.

The invention discloses a method for quantitatively determining contribution proportions of crude oil from different sources and periods. The method comprises the following steps: collecting a crude oil sample, a potential hydrocarbon source rock sample and a reservoir sample of a target oil and gas reservoir; comparing hydrocarbon isotopes and biomarker compounds of the crude oil sample and the potential hydrocarbon source rock samples, and determining a main hydrocarbon source rock; manufacturing an inclusion sheet; establishing a diagenesis mineral sequence of the target oil and gas reservoir; determining the capture periods of various hydrocarbon inclusions in the inclusion sheet; measuring the U-Pb age of the diagenetic minerals in each stage; determining each main reservoir forming period and the source of oil and gas in each main reservoir forming period; respectively measuring the fluorescence spectrum of the hydrocarbon inclusion corresponding to each main reservoir forming period; determining the fluorescence spectrum of the crude oil sample; according to the fluorescence spectrum of the crude oil sample and the fluorescence spectrum of the hydrocarbon inclusion, the contribution ratios of crude oil of different sources and periods are determined, so that quantitative analysis of the contribution ratios of different hydrocarbon source rocks in different reservoir forming periods is realized, and effective exploration deployment guidance can be provided.

The invention relates to a sweet spot reservoir prediction method based on source-sink-rock system coupling, and the method comprises the steps: constructing a sequence framework which comprises the steps: recognizing a single well sequence interface, carrying out the seismic sequence division of the sequence interface, and verifying the sequence interface through ancient biology; in the sequence framework, material source supply capacity calculation is carried out, a material source judgment system, an ancient landform recovery result and seismic attribute analysis are synthesized, sedimentary system distribution characteristics are identified, sedimentary facies belt prediction is carried out, and a sedimentary facies control sand body model is established; establishing a three-dimensional sand body distribution model based on the sequence framework, the distribution characteristics of the sedimentary system and the sedimentary facies control sand body model; a favorable zone is obtained through prediction according to seismic attributes of all system domains in the multiple sets of sand-rich deposition system distribution feature superposition coupling sequence grillages; and based on the three-dimensional sand body distribution model, and in combination with a reservoir diagenesis-physical property corresponding relationship summarized by single well actual measurement data, preferably selecting a sweet spot target in the favorable zone. According to the invention, the reliability of sweet spot reservoir prediction can be improved.

The present invention belongs to the fields of petroleum geology and tectono-diagenesis, and specifically discloses a method for determining the direction of the ancient maximum compressive stress during the formation of orthogonal tensile fractures. By combining the petrographic characteristics of fluid inclusions trapped in different minerals within orthogonal tensile fractures and the analysis of the development types of fluid inclusions, conducting laser Raman spectroscopy tests on methane-rich inclusions and microthermometric analysis of coexisting brine inclusions, using the pressure-volume-temperature simulation method to obtain the fluid pressure and temperature during the mineral crystallization process, combining the trapped temperature data with the burial history curve of this area, identifying the opening process and state of two groups of orthogonal tensile fractures, obtaining the time coupling relationship when the orthogonal tensile fractures are in the open state, and finally obtaining the direction of the ancient maximum compressive stress during the simultaneous opening process of the orthogonal tensile fractures according to tectonic stress analysis. It provides a new idea and method for judging the direction of the ancient maximum compressive stress during the formation of orthogonal tensile fractures.

This invention belongs to the field of oil and gas reservoir rock data identification technology, and particularly relates to a three-dimensional multi-mineral digital core modeling method. This application proposes a 2D-3DGAN algorithm, which can generate a three-dimensional data volume using only a single two-dimensional image. By combining the advantages of the 2D-3DGAN and AMICS methods, a "AMICS+2D-3DGAN" modeling method is proposed to achieve the establishment of multi-mineral, high-precision, and efficient three-dimensional multi-mineral digital cores. The former is used to obtain representative two-dimensional mineral scanning images, while the latter uses these two-dimensional scanning images as training images to generate three-dimensional multi-mineral digital images. The established model not only includes multiple minerals but also considers accuracy and economy, and can represent reservoir rocks, providing a solid foundation for subsequent diagenetic simulation based on multi-mineral digital cores, as well as research on reservoir electrical, acoustic, and mechanical properties.

The invention provides a reservoir productivity assessment method and device and related equipment, and the method comprises the steps: obtaining the logging data of a to-be-assessed reservoir target region, and the logging data comprise density logging data and interval transit time logging data; determining a fracturing index according to the logging data; determining a productivity index according to the fracturing index; and evaluating the productivity of the target region of the reservoir to be evaluated according to the productivity index. According to the method and the device, on the basis of a composite index, namely a fracturing index, factors such as inherent attributes of rock mechanics, diagenesis and influence of a crustal stress field on the complexity degree and the transformation volume of a reservoir fracturing fracture network can be comprehensively considered, the reservoir fracturing performance is continuously evaluated, the matching rate of a reservoir fracturing performance evaluation result and an actual condition is increased, and the evaluation accuracy of the reservoir fracturing performance is improved. And the selection precision of the fracturable interval is improved, and the multi-stage fracturing design precision is improved, so that the reservoir productivity evaluation precision is improved.

The invention belongs to the technical field of shale oil and gas exploration and development, and discloses a method for quantitatively characterizing the particle size of clastic particles of clastic rock based on a CT scanning structure image. The method comprises the following steps: firstly, acquiring a geological environment of target layer rock deposition diagenesis, determining image acquisition parameters, and performing multi-scale image acquisition to obtain a grayscale image; then obtaining characterization parameters by using an equivalent sphere algorithm, and constructing a digital model according to a screening standard; building a standard model and a digital result model by means of machine learning; and finally determining a hydrocarbon reservoir dominant reservoir and a fractured target layer section. According to the method, by means of multi-scale image acquisition, machine learning and the like, the accuracy of the three-dimensional digital model of the size and structural characteristics of the clastic particles of the clastic rock is improved, the exploration and development conditions of oil and gas can be predicted more accurately, the exploration and development efficiency is improved, the cost is reduced, and the problem of inaccurate measurement in the prior art is effectively solved.

The invention relates to the technical field of clay mineral conversion in the shale diagenesis process, in particular to a high-temperature and high-pressure simulation device and method for clay mineral conversion in the shale diagenesis process. The device comprises a diagenesis hydrocarbon generation reaction kettle unit, a temperature and pressure control unit, a fluid injection and liquid permeability detection unit, a gas-liquid separation, collection, metering and detection unit, a gas injection and discharge and permeability detection unit and a computer control unit. According to the application, various factors influencing the diagenesis, such as temperature, pressure, oxygen-free environment, relationship between various fluids and the diagenesis, flow state of the fluids, rock porosity and permeability change, fluid ion concentration change, hydrocarbon generation and hydrocarbon expulsion, clay mineral evolution and the like, are comprehensively considered, and the simulation experiment is more in line with geological reality; according to the reaction kettle, gas-liquid products are effectively separated, the sealing performance of the reaction kettle is detected before an experiment, the experiment success rate is increased, and meanwhile, a proper stirring speed is set, so that the stability of an experiment result is ensured.

The invention belongs to the technical field of oil-gas exploration, and provides a geological knowledge map construction method based on multi-source rock debris digitization and an exploration system, and the method comprises the steps: carrying out the multi-source rock debris data collection of a target region, establishing a rock debris digital necessary parameter system containing spatial resolution, mineral volume percentage, pore complexity index and pollution mark information; according to the rock debris digital necessary parameter system, geological entity data related to the rock debris sample is extracted through a deposition detector and a diagenesis map; and according to the geological rule base and the geological entity data, reasoning the relationship between the key nodes to generate a geological knowledge graph. Closed-loop management of rock debris data from collection to intelligent application is realized by establishing a rock debris digital necessary parameter system, and geological entity data related to rock debris samples is extracted through a deposition detector and a diagenesis map, so that scanning data can be directly associated with geological significance, and data relevance is improved.

This invention belongs to the field of shale oil and gas exploration and development technology, and discloses a method for quantitative characterization of clastic rock particle size based on CT scan structural images. The method first acquires the geological environment of the sedimentary diagenesis of the target layer, determines image acquisition parameters, and performs multi-scale image acquisition to obtain grayscale images. Then, it uses the equivalent sphere algorithm to obtain characterization parameters and constructs a digital model based on screening criteria. Next, it utilizes machine learning to construct a standard model and a digital result model. Finally, it identifies the dominant reservoirs and target fracturing intervals of the oil and gas layer. This method, through multi-scale image acquisition and machine learning, improves the accuracy of the three-dimensional digital model of clastic rock particle size and structural characteristics, enabling more accurate prediction of oil and gas exploration and development, improving exploration and development efficiency, reducing costs, and effectively solving the problem of inaccurate measurements in existing technologies.

According to the method for measuring the true density of the coal rock, provided by the invention, different evolution stages experienced by the coal rock in a complex geological history can be efficiently and accurately identified. The stages cover the initial diagenesis to the later metamorphism, and each stage is accompanied by significant changes of physical and chemical properties of the coal rock. Besides, the method also has excellent distinguishing capability, the carbonaceous mudstone can be clearly and effectively distinguished from other types of coal rocks, and the carbonaceous mudstone is used as a special sedimentary rock, has complex components, often contains relatively high organic matters, and has significant difference from conventional coal rocks in multiple aspects. Therefore, the method not only contributes to deepening the understanding of the formation cause and the evolution process of the coal rock, but also provides important technical support and scientific basis for the fields of exploration and development of coal resources, environmental protection and the like.

The present invention discloses a method for preparing a dense uranium-bearing sandstone artificial core. The method comprises mixing quartz sand and feldspar of different particle sizes, adding clay, uranium-bearing minerals, and calcium hydroxide powder, and mixing. The mixture is then sprayed with water to moisten the mixture, stirred, and cooled to room temperature. The mixture is placed in a core mold and heated and pressurized, while simultaneously injecting a small amount of preheated water to maintain a constant temperature and pressure for reaction. Carbon dioxide and hydrogen sulfide gases are introduced into the core mold at least three times, and the amount of gas and liquid that do not participate in the reaction is collected and measured. The mold is then cooled and depressurized, followed by drying, and the amount of gas and liquid that participate in the reaction is measured. The reaction pressure, temperature, and pH are evaluated, and the pressure, temperature, and gas and liquid injection rates are adjusted until a sample similar to the diagenetic environment of natural dense uranium-bearing sandstone is obtained. The method can realistically simulate the hydrothermal fluid injection process, as well as the sedimentation, compaction, cementation, replacement, and dissolution diagenesis processes involved in the diagenetic process of uranium-bearing sandstone, thereby producing a dense uranium-bearing sandstone artificial core with satisfactory physical properties.

The invention provides a sedimentary-diagenesis coupling effect quantitative characterization and favorable zone evaluation method for dense sandstone reservoir dessert prediction, which comprises the following steps: modeling geological effects such as deposition, compaction, cementation, cracks and the like into a Markov decision process, and defining an instant reward function to quantify porosity and permeability evolution; the Wasserstein distance and the quantitative modal logic are adopted to measure the one-step evolution similarity and the multi-step evolution similarity; generating a specific evolution process by using the bound variable abstract syntax tree and single variable substitution; comparing with a historical dessert template to calculate a mixing metric, screening dessert candidate units, and clustering to form a favorable zone; and finally, combining budget and risk to construct a multi-selection knapsack model, and optimizing an optimal development scheme under constraints. According to the method, the comprehensive influence of the sedimentary-diagenesis coupling effect on the porosity and permeability can be accurately depicted, and quantitative prediction and guided development of a high porosity and permeability potential zone are achieved.

The present invention discloses a prospecting method for the Zijinshan copper-gold deposit based on surface geology and rock properties, which relates to the technical field of prospecting methods and includes the following steps: Step 1: Obtain the spatial position of underground magnetic rock bodies through magnetic field observation and inversion according to the prospecting target; Step 2: Find the old strata and magnetic rock bodies or hidden rock bodies on the surface; Step 3: Infer the maximum mineralization depth through drilling rock physical property testing; Step 4: Predict the mineralization range based on geochemical anomalies, comprehensive geophysical anomalies, and geological anomalies; Step 5: Drill verification and modify the prospecting range; Step 6: Summarize the hydrothermal magma diagenesis and mineralization model. The present invention adopts the above-mentioned prospecting method for the Zijinshan copper-gold deposit based on surface geology and rock properties, identifies the intense alteration zone through core physical property observation, and then determines the location of the ore body by combining geology and other geophysical and geochemical methods; The magnetic susceptibility of the rock in the depth direction reveals the diagenesis and mineralization environment; The magnetic susceptibility of the aeromagnetic three-dimensional inversion infers several hidden igneous rock bodies.

The invention discloses a bioclastic limestone sedimentary mode construction method and system, and belongs to the technical field of carbonate rock sedimentary, and the bioclastic limestone sedimentary mode construction method comprises the steps of reversely deducing biological types and rock structures, and carrying out primary correction and secondary correction on a theoretical sedimentary mode. By adopting multiple geological control factors, tectonic scene control, sedimentary environment control, sequence stratigraphic cycle control and Wafer facies law control, the accuracy of the model is improved under the control of the multiple geological factors, the model is matched with geological cognition of different subjects, original sedimentary biological debris is reversely deduced on the basis of a diagenetic mode, and the stratum sequence stratigraphic cycle control and the Wafer facies law control are combined. The interference of diagenesis is eliminated; according to the biological shell particle size and the structure maturity, the concept deposition mode is continuously corrected, and the defects that the bioclastic limestone is subjected to non-in-situ deposition, and the indication of organisms to the deposition environment is weak are overcome.

The invention discloses a method for evaluating the influence of a coated clay cladding on reservoir quality, and relates to the technical field of oil and gas reservoir evaluation and petroleum geological prospecting, and the method comprises the following steps: S1, obtaining basic parameters: obtaining petrology parameters, clay cladding parameters, geochemical parameters and geological environment parameters of a target reservoir; s2, constructing a reactive transport model; s3, multi-scenario simulation operation: operating the model, and respectively simulating mineral dissolution and precipitation processes and porosity evolution of the target reservoir under two scenarios of CO2 enriched fluid and organic acid enriched fluid; and S4, comprehensive evaluation and result output: comparing and analyzing simulation results under two situations of CO2 enrichment fluid and organic acid enrichment fluid, outputting a net porosity variation value and a dominant diagenesis mechanism, and finally evaluating the quality influence of the clay cladding reservoir according to the net porosity variation value and the dominant diagenesis mechanism, so as to realize dynamic, quantitative and accurate evaluation. The problem of reservoir quality prediction caused by clay cladding dual effects is solved.

The present application relates to oil and gas exploration technology field, particularly to a kind of amorphous material genesis determination method in rock, on the basis of existing thin section identification analysis method and scanning electron microscopy analysis method, introduce element test and element three end element analysis method, using statistical and element geochemistry View, realize the quantitative analysis of amorphous material genesis in rock, and then analyze rock diagenesis main control factor.Through the determination method, the influence degree of sedimentation and volcanic action can be determined by analyzing the genesis type of amorphous material in rock, and then the main control factor of diagenesis is determined, which can effectively solve the problem of amorphous material genesis identification in rock.