26 results about "Sedimentary basin" patented technology

The invention belongs to the technical field of geophysical exploration and sedimentary basin structure analysis, and particularly relates to a broken basin sag identification method based on data discontinuity or multiple data sources, which comprises the following steps: S1, acquiring and preprocessing multi-source gravity data; s2, gravitational field characteristic parameter calculation and primary anomaly extraction; s3, performing superposition analysis on the known sag boundary and the gravitational field features; s4, boundary identification index calibration based on a statistical model; and S5, delineating a recess boundary system of discontinuous data or multiple data sources. The method provided by the invention can solve the problem that the recess structure is difficult to identify due to discontinuous data and inconsistent benchmarks, and realizes continuous and accurate delineation of discontinuous data or recess boundaries of multiple data source construction units.

The invention discloses a sedimentary basin well-free area earth heat flow prediction method, device and equipment, and the method comprises the steps: determining the thickness of each stratum layer of a sedimentary basin well-free area based on seismic data, a sedimentary cover layer, a base structure and earth crust layering features; determining the rock heat generation rate of the sedimentary cap layer and the wrinkled substrate based on the rock core sample and / or natural gamma logging data of the basin mature exploration area; based on the seismic longitudinal wave velocity, determining rock heat generation rates of the lower earth crust and the middle earth crust; determining the rock heat generation rate of the upper earth crust based on the rock heat generation rate of the wrinkled substrate and the rock heat generation rate of the middle earth crust; based on the valance heat flow values of the upheaval area and the depression area of the basin mature exploration area and the structural evolution characteristics of the basin where the sedimentary basin well-free area is located, determining the valance heat flow of the sedimentary basin well-free area; according to the method, a new thought is provided for finely depicting the current ground temperature field characteristics of the sedimentary basin well drilling deficient region.

This invention discloses a comprehensive prediction method for oil-uranium-hot dry rock-shale oil in sedimentary basins, belonging to the field of geological exploration technology. This method involves using effective geophysical methods to extract basic geological background information, constructing a three-dimensional spatial framework of the basin, clarifying the correlation between structures, strata, and igneous rocks, calculating the correlation coefficient and intercept of airborne gravity and magnetic anomalies, initially screening key target areas, extracting key information on energy resource accumulation / mineralization, performing two-dimensional or three-dimensional characterization of target geological bodies, combining magnetotelluric sounding inversion profiles with seismic and drilling data, adjusting core parameter settings, and overlaying oil-uranium-hot dry rock-shale oil resource accumulation / mineralization evaluation information to obtain comprehensive energy resource prediction results. This method can provide scientific and technical support for basic geological research on oil-uranium-hot dry rock-shale oil in sedimentary basins and provide comprehensive and reliable prediction of resources.

The application discloses a buried volcanic mechanism phase zone denudation amount recovery method and belongs to the technical field of sedimentary basin denudation amount recovery. The method comprises six steps of establishing a denudation amount recovery foundation database, identifying a buried volcanic mechanism and dividing internal phase zones, distinguishing different phase zone denudation recovery methods, determining a regional denudation reference amount, near-source phase zone and middle-source phase zone denudation amount recovery and far-source phase zone denudation amount recovery. According to the morphological characteristics and weathering denudation differences of different phase zones of the buried volcanic mechanism, the method determines the denudation amount recovery methods of the near-source phase zone, the middle-source phase zone and the far-source phase zone, respectively, avoids the error caused by uniformly assigning the regional denudation amount to the whole volcanic mechanism, realizes the differentiated recovery of the denudation amounts of different phase zones of the buried volcanic mechanism, improves the rationality and the quantitative degree of the denudation amount recovery of the buried volcanic mechanism, and thus has good application value for deep-ultra deep oil and gas exploration.

The invention relates to the technical field of geological exploration, and provides a sedimentary basin strike-slip fracture related oil and gas filling point judgment method, which comprises the following steps: collecting geological information of a target area, obtaining strike-slip fracture segment characteristics, fault properties and strike-slip fracture grids of a hydrocarbon source rock overlying compact layer (such as a gypsum-salt layer) in the target area by adopting qualitative analysis, and determining the strike-slip fracture segment characteristics and fault properties of the target area according to the strike-slip fracture segment characteristics, the fault properties and the strike-slip fracture grids. Determining a rough range of a charging point; calculating the key layer thickness of the hydrocarbon source rock stratum and the compact layer and the conduction coefficient of the top of the compact layer, carrying out normalization processing, and carrying out filling point correction according to quantitative data obtained through calculation and in combination with strike-slip fracture segmentation characteristics; and verifying the corrected charging point according to the fluctuation point of the segmented change of the oil-gas migration index and the crude oil physical property parameter index. According to the method provided by the invention, the accuracy and reliability of the method for judging the strike-slip fracture related oil and gas filling points can be remarkably improved, guiding significance is provided for oil and gas exploration, and exploration benefits are greatly improved.

The present invention relates to a method for obtaining a stability window by applying multiscale numerical modeling (sedimentary basin-well) capable of estimating with greater accuracy the in-situ state used in well-scale analysis. Specifically, the present invention proposes modeling steps that treat the geomechanical analysis for well drilling projects as a multiscale analysis, with the possibility of including tectonic effects and physical couplings observed at larger scales (sedimentary basin, regional or lithospheric) in well-scale simulations. In general, the modeling is performed through the direct application of seismic data and the calculation of the overload to determine the parameters and boundary and initial conditions of the simulation, that is, without directly connecting the well-scale modeling with the larger geological context.

The application discloses a sedimentary basin building group earthquake disaster evaluation method and an evaluation system, belongs to the technical field of engineering disaster prevention, and is characterized in that the sedimentary basin building group earthquake disaster evaluation method comprises the following steps: S1, determining a target site and characteristic input parameters; S2, establishing a three-dimensional sedimentary basin model and obtaining a seismic response; S3, establishing an improved data set; S4, optimizing an artificial neural network; S5, obtaining samples; S6, determining seismic motion parameters; S7, prediction and evaluation. The application improves the calculation efficiency of building the data set and evaluating the influence of site medium parameter uncertainty on basin seismic motion by means of a fast multipole algorithm and a surrogate model in sequence, can give statistical moment and probability information of peak acceleration of the basin ground surface at any position, and is applied to rapid prediction and evaluation of building group earthquake disaster, and serves a resilient city.

The invention relates to the technical field of coal-bearing basin resource exploration, and provides an acidic water sedimentary basin coal measure strata fine-grained rock lithofacies classification method. The method comprises the following steps: firstly, carrying out kerogen separation and organic element, TOC (Total Organic Carbon) and total rock analysis test on different rock core samples; the mass ratio Cd of the organic carbon in the organic elements is calculated, and then the total organic matter mass fraction is obtained; carrying out normalization treatment on four-end-member components including total organic matters, long quartz minerals, clay minerals and carbonate minerals; and finally, first-level and second-level lithology classification is performed according to the total organic matter content and the contents of the three types of components in sequence, and fine-grained rock facies classification is determined in combination with sedimentary structure analysis. The method for determining the conversion coefficient of the organic carbon and the organic matter is high in pertinence and more accurate; the lithofacies classification scheme fully considers the effect of organic matter components in lithofacies division of coal-series fine-grained rocks, is more suitable for coal-series fine-grained rocks with wide organic carbon content distribution, and can better reflect the advantages, disadvantages and differences of coal-series fine-grained rocks with different organic matter contents.

Extraction of gravel morphological parameters is an important research content of sedimentology, and due to the fact that the work requires to collect a large amount of sample data, a traditional working method is tedious in process and low in efficiency; and the geological action is a gradual change process, and the gravel form is ever-changing and is always one of the properties which are most difficult to describe and quantify of an object, so that the method has important practical significance on intelligent acquisition of the gravel. According to the method, a gravel image sample database is established, an intelligent gravel identification model is constructed based on an artificial intelligence (AI) method, and intelligent identification and extraction of gravel morphological parameters are realized, so that powerful methods, means and data support are provided for geologists to carry out related researches; the method has a wide application prospect in the aspects of studying the material source, the sedimentary environment, the paleo-geographic characteristics, the structural environment, the paleo-environment transition and the like of the sedimentary basin.

The present application relates to a kind of sedimentary basin cover layer fracture inference method, comprising: a. collect the aerial uranium data of sedimentary basin area, form the basis database, collect the geological data of sedimentary basin area, understand the distribution characteristics of regional fault structure;B. the average value and standard deviation of the content of aerial uranium in sedimentary basin area are counted, determine the weak anomaly extraction benchmark background threshold and the minimum amplitude of abnormality of aerial uranium content;C. according to weak uranium anomaly extraction threshold, weak uranium anomaly is extracted according to survey line by survey line, and weak uranium anomaly database is formed;D. the weak uranium anomaly information is discriminated, and interference anomaly information is removed, according to the distribution characteristics of known fault structure, identify and extract fault structure weak uranium anomaly information;E. according to the extracted fault structure weak uranium anomaly information, the weak anomaly of aerial uranium is connected in line for continuous and consistent extension direction, and the distribution of sedimentary basin cover layer fault structure is obtained.The present application can quickly and low cost infer the cover layer fracture of sedimentary basin.

The present application belongs to the technical field of sedimentary basin uranium exploration, and particularly relates to a method for restoring paleo-hydrodynamic conditions of a sedimentary basin. The present application comprises the following steps: Step 1: determining the tectonic evolution process and uranium mineralization period of a study area; Step 2: extracting drilling data; Step 3: drawing maps; Step 4: restoring paleo-hydrodynamic conditions. Based on the research on the relationship between tectonic evolution and uranium mineralization age, the present application draws paleo-topographic maps, paleo-geological maps, lithology distribution maps and the like of the last uranium mineralization period through a drilling database.

This application provides a method for determining the basement undulation characteristics, relating to the field of geological exploration technology. The method includes: acquiring time series of electrical characteristic values ​​corresponding to multiple measuring points at various locations within a geographic area to be measured using sensors deployed at these points; processing the time series of electrical characteristic values ​​at these points to obtain a geoelectric profile of the geographic area to be measured; reading resistivity data from multiple pre-selected locations within the strata of the geographic area to be measured from the geoelectric profile, using these as multiple data to be processed; and clustering these multiple data using a pre-defined clustering algorithm to obtain a stratigraphic classification result characterizing the basement undulation characteristics of the geographic area to be measured. This method can accurately determine the basement undulation characteristics of sedimentary basins, providing valuable reference for delineating favorable mineralization areas of sandstone-type uranium deposits.

The invention relates to the field of sedimentology research, in particular to a fine material source analysis method for a mountain-building basin, which is realized by adopting a Monte-Carlo simulation method, and the Monte-Carlo simulation method realizes the analysis process of a plurality of sub-source areas on sedimentary basin material sources by utilizing highly decomposed age spectrum new subclasses. Height decomposition of the method is completed by clustering and heat map analysis of age spectrum data of debris zircon in a sedimentary basin and a source region, and height decomposition of complex age spectrum data in a source-sink process is realized by decomposing complex age spectrum clusters of the sedimentary basin and the source region into different age spectrum new subclasses. The problem that hybrid data of the sedimentary basin is analyzed by using hybrid data of a source region traditionally is avoided, age spectrums of the sedimentary basin and the source region are clear at a glance, and potential uniformity or diversity characteristics of the sedimentary basin and the source region are easy to identify.

The present application belongs to the field of petroleum geology, and particularly relates to a method for evaluating oil and gas maturity in a fluid inclusion by using infrared spectrum. First, a fluid inclusion slice prepared from a stratum rock sample in a sedimentary basin is obtained; a filling sequence of diagenetic minerals in the stratum rock is determined; different occurrences of oil and gas are judged by petrographic characteristics under a microscope and fluorescence spectrum characteristics of the rock slice; infrared spectrum testing is performed on the oil and gas inclusions with different occurrences, and infrared spectrum characteristics of inclusions in different stages are obtained; a required spectrum range peak area is extracted from a spectrum diagram and brought into a formula; and an effective parameter for evaluating oil and gas maturity in the inclusions is obtained by using the formula and is sorted. The instrument used in the present application eliminates the requirement and limitation of traditional infrared spectrum on the size of the inclusions, and can measure and evaluate most oil and gas inclusions with smaller size.

The invention discloses a method and device for determining the absolute time of tectonic deformation, equipment and a medium. The method comprises the following steps: determining mineral samples at at least two positions of a target structure, and performing low-temperature thermal chronological analysis on each mineral sample; performing thermal history simulation according to the low-temperature thermal chronology analysis result of each mineral sample to obtain a thermal history simulation result of each position of the target structure; and performing difference comparison on the thermal history simulation results of the positions of the target structure to obtain the structural deformation absolute time of the target structure. According to the technical scheme, after the mineral samples at different positions of the target structure are obtained through differential sampling, the tectonic deformation absolute time of the target structure is determined on the basis of low-temperature thermal chronology analysis, thermal history simulation analysis and differential comparative analysis, the problem that the tectonic deformation absolute time of an existing sedimentary basin is difficult to accurately determine is solved, and the accuracy of the tectonic deformation absolute time is improved. The method for determining the absolute time of the tectonic deformation of the sedimentary basin is realized.

The application provides a kind of sedimentary basin natural hydrogen resource quantity calculation method and its application, it is related to the technical field of resource exploration, including: by determining the total hydrogen production rate of target area, capture efficiency, hydrogen loss rate and hydrogen residence time, the geological resource quantity of natural hydrogen in target area is calculated by using material balance method;Wherein, the total hydrogen production rate includes the hydrogen generation rate from at least one source of serpentine reaction, radioactive radiation effect and deep mantle degassing;Capture efficiency is the proportion of effectively stored hydrogen gas in generated hydrogen gas;Hydrogen loss rate is the annual loss amount of hydrogen gas in underground system due to physical, chemical and biological loss mechanism;Hydrogen residence time is the time for hydrogen to stay and be saved in geological body.The application considers the key parameters such as total hydrogen production rate, capture efficiency, hydrogen loss rate and residence time, and first constructs a natural hydrogen geological resource quantity calculation model suitable for sedimentary basin scale.

The invention relates to the field of quantitative characterization research and application of fractures related to key reservoir elements in a sedimentary basin, and particularly discloses a quantitative characterization method for fractures related to key reservoir elements in the sedimentary basin. By implementing sedimentary facies belts, rock types and diagenesis stages, identifying and counting fracture parameters of a target area, establishing fracture development sequences of different sedimentary microfacies, different rock types and different diagenesis stages one by one, establishing a geologic model of key elements of the three-position reservoir, and establishing a three-position reservoir model based on seismic inversion and an overall fracture model constrained by an ant body. The influence degrees of other elements on the crack are calculated, and then the contribution degrees of the three elements on the overall crack are distributed in sequence. According to the method, a new research technical means is provided for quantitative characterization of key reservoir element-related cracks in the sedimentary basin.

The present application belongs to the field of petroleum geology, and particularly relates to a method for theoretically calculating the upper limit of the temperature and pressure of inclusion preservation in a sedimentary basin. On the basis of analyzing and determining the weak direction of deformation of common minerals in a sedimentary basin, the tension or burst differential pressure analysis is performed on the common diagenetic minerals, the homogenization temperature, salinity, and CO2 and CH4 concentration settings of fluid inclusions under different systems, the isochore lines of fluid inclusions under different salinities under different systems are drafted, and the formation temperature and pressure gradient curve is drafted, and finally the theoretical temperature and pressure of the fluid inclusions occurring tension or burst with the formation uplifting / deep burying are obtained by the difference between the isochore lines of the fluid inclusions under different salinities under different systems and the formation temperature and pressure gradient line. The method is an important supplement to the basic theory and analysis method of fluid inclusions, is a deepened understanding of the re-equilibrium mechanism of fluid inclusions, and is helpful to promote the development of fluid inclusion geochemistry.

The present application relates to shale oil and gas exploration and development technical field, disclose a kind of palaeogeomorphology quantitative characterization method, equipment and storage medium, method comprising the following steps: determining palaeogeomorphology study area, and obtaining study area basic parameters and address data, obtain palaeogeomorphology recovery key parameters;Palaeogeomorphology recovery key parameters are calculated and analyzed, restore ancient topography;According to the restored ancient topography, quantitative recovery ancient river system, obtain ancient river system prototype;According to the restored ancient topography, quantitative depict ancient slope, obtain ancient slope plane distribution;According to ancient river system prototype, establish the relationship between sedimentation noise and water depth change, qualitative characterization ancient water depth;According to qualitative ancient water depth, calculate relative water depth D, to predict ancient water depth H.The present application has beneficial effects: establish palaeogeomorphology three-dimensional space configuration relationship, reveal the evolution of micro-palaeogeomorphology of the same sedimentary basin, to effectively guide shale oil and gas exploration and development, provide more reliable model for its evaluation.

A method for modelling the formation of a sedimentary basin using a stratigraphic forward modelling program is disclosed, wherein the stratigraphic forward modelling program simulates the superposition of successive layers of sediments, each layer of sediments corresponding to a determined period of time, the method comprising: a. Receiving a facies log comprising a succession of layers of different facies, b. determining environmental conditions associated to at least some of the facies of the facies log to infer an environmental factor log, c. determining from the facies log a number of layer of sediments and a thickness of each layer of sediments to be simulated by the stratigraphic forward modelling program for modelling the facies log, and d. determining, from the environmental factor log, environmental parameters associated to the layers of sediments to be simulated by the stratigraphic forward modeling program such that the superposition of the simulated layers or sediments corresponds to the facies logs.

Method for estimating total organic carbon (TOC) of rock samples in an automated manner and without the use of destructive techniques. The technique obtains hyperspectral data from rock samples and trains and uses machine learning algorithms, among them artificial neural networks (ANN), to estimate TOC based on the obtained hyperspectral data. The method described herein may be applied to rock samples from different sedimentary basins, provided that the algorithms are trained with samples from all basins. The method has been shown to be generalizable to other rock samples belonging to the basin or sedimentary basins used in the training of the algorithms. The method eliminates the subjectivity of the human analyst and optimizes the time and resources expended in conventional TOC estimation.

The invention discloses a method for tracing the hydrothermal activity of a sedimentary basin, and belongs to the technical field of geochemistry and isotopic tracing. The tracing method comprises the following steps: pre-treating a mixed mineral sample, separating and purifying a lithium element, and measuring a delta 7 Licarb value; carrying out correlation analysis on the delta 7 Licarb value and the main trace element characteristics of the sample; correcting the measured delta 7 Licarb value of the mixed mineral sample; performing correlation analysis on the corrected data of the mixed mineral sample, a hydrothermal activity index and an anti-weathering index; and determining a corrected background value of delta 7Li in the research sequence, and judging a hydrothermal activity enhancement period, a hydrothermal activity weakening period or a non-hydrothermal dominant period by comparing a difference between a lithium isotope ratio of a continuous layer section and a background interval value. The method has the advantages of continuous high resolution, wide temperature range sensitive response, clear mechanism, strong anti-interference capability and strong universality.

The application discloses a kind of sedimentary basin hydrothermal activity tracer method, belong to geochemistry and isotopic tracer field.The tracer method includes the pretreatment of mixed mineral sample, lithium element separation and purification and δ 7 Li carb Value determination;The correlation analysis of δ 7 Li carb Value and the main trace element characteristics of sample;The measurement δ 7 Li carb Value of mixed mineral sample is corrected: the correlation analysis of corrected data of mixed mineral sample and hydrothermal activity index and anti weathering index;Determine the δ 7 Li 校正后 Background value in study sequence, judge hydrothermal activity enhancement period, hydrothermal activity weakening period or non-hydrothermal dominant period by comparing lithium isotopic ratio of continuous section and background interval value difference.The method has the advantages of continuous high resolution, wide temperature range sensitive response, mechanism is clear, strong anti-interference ability and strong universality.

The application discloses a method for identifying first and second sequence interfaces based on seismic data, which comprises the following steps: obtaining seismic data, identifying and selecting a target unconformity interface to be determined; taking the interface as a horizontal datum plane to perform palaeogeomorphology recovery processing and generating a flattened data volume; determining first and second sedimentary centers of a basin where the upper and lower stratum units of the interface are located respectively; measuring the lengths of the semi-major axes of the sedimentary basins where the upper and lower strata are located and calculating the planar distance between the two sedimentary centers; according to the ratio of the planar distance to the sum of the lengths of the two semi-major axes, determining whether the target interface belongs to a first sequence interface or a second sequence interface according to a sedimentary center migration mode. The application reduces the dependence on well logging data, introduces a mathematical threshold to abandon subjective experience judgment, realizes the objectification and semi-quantification of sequence interface classification, and provides reliable technical support for oil and gas exploration in areas with few or no wells.

The invention relates to the technical field of logging data interpretation, and particularly discloses a method and device for quantitatively evaluating the contribution degree of a tectonic extrusion overpressure cause, and the method comprises the steps: collecting logging, geological and seismic data of a target layer; calculating an overlying stratum load and a vertical effective stress based on the logging information; based on logging and geological data, a mudstone logging curve combination, a vertical effective stress-sound wave speed cross plot and a vertical effective stress-rock density cross plot are established, and structural extrusion type overpressure is judged; on the basis of the geological data and the overlying stratum load, the extrusion tectonic force of the target well is obtained through calculation; and based on the extrusion tectonic force, the formation pore pressure generated by the three-dimensional compaction effect under the extrusion tectonic force condition and the non-extrusion tectonic force condition is calculated, and the contribution degree of tectonic extrusion to formation overpressure is explained. The method is suitable for evaluating the sedimentary basin caused by the structural extrusion type overpressure, and the problem that one-dimensional simplification of a conventional stress state and real stratum compaction are contradictory in three-dimensional stress combined action is solved.

The present disclosure relates to a method for identifying the distance of sediment source in a fault basin based on well logging data, which analyzes the paleocurrent by using the imaging logging data, determines the direction of the paleocurrent, and then scales the imaging logging, conventional logging and nuclear magnetic logging by using the core, determines the conventional logging response characteristics, nuclear magnetic T2 distribution spectrum characteristics of the far source, medium source and near source, establishes the source distance identification chart, realizes the longitudinal continuous, efficient, accurate and low-cost sediment source distance discrimination, and provides an important basis for the analysis of the sediment basin; the present disclosure analyzes the distance of the sediment source based on the well logging data, fully excavates the geological information of the existing well logging data, reduces the cost to the minimum, and solves the problems of the discontinuity of the source distance determined by using the core data, and the low accuracy of the source analysis result when the core data is insufficient.