57 results about "Sedimentary basin" patented technology

The invention discloses a land sedimentary basin deep saline water layer gas storage site selection method, which comprises the following steps of: preliminarily delineating a plurality of first candidate areas through judgment of basic geological conditions and hydrogeological conditions; further delineating a second candidate area through reservoir parameter quantitative evaluation, cover layer integrity evaluation, reservoir fracture connectivity evaluation and injection-production process pressure field change dynamic simulation; performing security assessment on the second candidate region; performing economic evaluation on the second candidate region; constructing an index system based on technical, safety and economic indexes, setting the weight of each index, and performing suitability scoring on each second candidate region; selecting the second candidate area with the suitability score meeting the requirement as a gas storage construction preselection point; and the built gas storage in the area adjacent to the gas storage building pre-selection point or the gas storage building pre-selection point verified to be qualified is selected as the gas storage to be put into use. The method can select a suitable site for large-scale safe natural gas storage, and is rapid and efficient to implement and suitable for popularization.

The invention discloses a land sedimentary basin salt water layer carbon dioxide geological storage site selection method comprising the following steps: carrying out geological exploration in a to-be-stored area, and delineating a storage prospective area; geological exploration is carried out in the sequestration distant view area, a trap structure and geological conditions beneficial to carbon dioxide sequestration are found, and a sequestration target area is delineated through pre-exploration well drilling in combination with important mineral resource exploration development conditions and carbon dioxide sequestration and mineral resource development configuration; geological exploration is carried out in a storage target area, supplementary drilling is carried out under the conditions of shaft corrosion prevention and leakage, carbon dioxide storage and mineral resource development are configured to avoid the risk of carbon dioxide leakage caused by mineral resource development and abandoned drilling by combining important mineral resource exploration and development conditions, and a storage site is delineated; determining a carbon dioxide injection layer; and sealing site selection is completed. According to the method, a proper sealing site can be screened for large-scale safe carbon dioxide sealing for the salt water layer of the sedimentary basin, and the sealing effect is ensured.

The invention belongs to the field of petroleum geology, and particularly relates to a method for theoretically calculating the preservation temperature and pressure upper limit of a sedimentary basin inclusion. On the basis of analyzing and determining the deformation weakness direction of common minerals in the sedimentary basin, the common diagenetic minerals are subjected to stretching or burst pressure difference analysis, and the deformation weakness direction of the common minerals in the sedimentary basin is determined by setting the uniform temperature, salinity and CO2 and CH4 concentrations of fluid inclusions under different systems, drawing up isovolumetric lines of the fluid inclusions with different salinity under different systems and drawing up a formation temperature and pressure gradient curve. And finally, obtaining the theoretical temperature and pressure of stretching or bursting of the fluid inclusion along with formation lifting / deep burying through the difference between the isovolumetric line of the fluid inclusion with different salinity and the formation temperature and pressure gradient line under different systems. The method is an important supplement to the basic theory and the analysis method of the fluid inclusion, is a deepened understanding of the rebalance mechanism of the fluid inclusion, and is helpful for promoting the development of geochemistry of the fluid inclusion.

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 present application provides a prospecting method for sandstone-type uranium deposits based on the boundaries of tectonic units. The method includes: obtaining geological data of a sedimentary basin, determining the spatial distribution, tectonic and stratigraphic characteristics of tectonic units in the sedimentary basin, and determining the types of favorable ore-forming tectonic units according to the spatial distribution, tectonic and stratigraphic characteristics of the tectonic units; for different types of favorable ore-forming tectonic units, combining the gravity data and / or seismic data and / or oil and gas-bearing conditions of the favorable ore-forming tectonic units to determine the primary exploration target areas for sandstone-type uranium deposits. Based on the in-depth analysis of the uranium ore-forming characteristics controlled by the boundaries of tectonic units, the present application takes the uplifts and faults at the boundaries of tectonic units as important indicators for prospecting, and combines geological and geophysical prospecting methods to form a new, efficient and low-cost prospecting method, which can not only accurately lock in the preferred targets in the exploration areas for sandstone-type uranium deposits, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency.

The invention discloses a method for determining a black shale material source carrying path, and relates to the technical field of shale oil and shale gas exploration and development engineering. According to the method, the contents of clay minerals and feldspar are specially selected to be combined with the granularity of shale particles to establish a series of plane contour maps, and through superposition of the plane contour maps, a carrying path with siliceous clastic rock as a main material source, a carrying path with carbonate rock as a main material source and a carrying path of gravity flow are judged; and the carrying path of the black shale of the target layer series in the research area is determined through superposition of the carrying paths. According to the method for determining the carrying path of the black shale material source, the ancient landform of the sedimentary basin can be effectively recovered, an important means is provided for optimization of a favorable shale oil and gas exploration and development area, and then the success rate of well drilling can be effectively increased.

The invention provides a method for determining an oil and gas reservoir forming period based on xenotime in-situ U-Pb dating, which comprises the following steps: collecting a sedimentary rock sample of a petroliferous basin, selecting xenotime particles from the sedimentary rock sample, and carrying out in-situ U-Pb dating to obtain U-Pb age data of the sample; determining the rock thermal evolution history according to the U-Pb age; the method comprises the following steps: establishing a mapping model of a basin thermal evolution history and an oil and gas accumulation and accumulation period, matching a thermal evolution history after rock autodeposition and diagenesis with the mapping model of the basin thermal evolution history and the oil and gas accumulation and accumulation period, obtaining a period of an oil and gas accumulation event of a basin oil and gas reservoir, and determining the basin oil and gas accumulation period according to the period of the oil and gas accumulation event. According to the method, the early diagenesis is determined by using the xenotime, and the period of each main fluid and thermal event influencing the sedimentary basin can be determined, so that a breakthrough from'indirect inference 'to'direct dating' is realized, the dating precision of oil and gas reservoirs is improved, and the quantitative development of fluid activity research of the sedimentary basin is promoted.

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.

The invention provides a lithofacies paleogeography mapping method and system based on tectonic-sedimentary differentiation research. The method comprises the following steps: analyzing and determining key tectonic event occurrence and evolution processes of different key times based on a basin to be processed; geologic structure types and spatial distribution rules of different regions are analyzed, and a geologic structure partition map is comprehensively compiled; a stratum and a stratum internal structure are divided by combining logging, rock cores, rock debris and seismic data; further analyzing a structure-deposition differentiation type based on internal characteristics of the stratum, establishing a non-Wartt facies deposition-structure mode, determining a filling sequence interface division scheme, establishing a sequence stratigraphic well-connecting framework, and analyzing a stratum filling rule; main control factors are researched on the basis of the divided sedimentary facies law units, the spatial distribution law of the mapping units is analyzed, and a lithofacies paleogeography map is compiled and formed. By adopting the scheme, the problems of limited mapping mode and insufficient accuracy in the prior art can be solved, the structure development evolution condition of the sedimentary basin is reliably represented, and the map accuracy is improved.

The invention relates to a deepwater sedimentary basin paleo-water depth recovery method based on sequence stratigraphic framework constraint. The method comprises the steps that multi-source geological data and time-varying sea level data of a region where a deepwater sedimentary basin is located are acquired; according to the multi-source geological data and the time-varying sea level data, data fusion of different spatial and temporal scales is carried out, and a sequence stratigraphic framework is established; obtaining landform parameters of each sedimentary stratum in the sequence stratigraphic framework; classifying the landform parameters by using a random forest algorithm to generate a landform unit distribution map; constraining land frame slope break positions of sedimentary stratums of different sequences by using sea level data, and obtaining ancient land frame slope breaks of each sequence according to a landform unit distribution diagram and a sedimentary facies belt distribution rule; geological environment parameters are obtained, and a mechanical model is established; calculating the original deposition thickness of each sequence by using a mechanical model; and according to the original deposition thickness, the paleo-land shelf slope break and the landform unit distribution diagram, the paleo-water depth of each sequence is calculated. The method improves the calculation precision of the paleo-water depth.

This application provides a method for determining the potential of tectonic units to produce sandstone-type uranium deposits, belonging to the field of uranium exploration technology. The method includes: dividing the sedimentary basin area into tectonic compression zones, tectonic extension zones, and tectonic strike-slip zones; determining the type of metallogenic block for sandstone-type uranium deposits; determining the type of metallogenic tectonic unit and favorable metallogenic tectonic units; rapidly delineating metallogenic tectonic units based on the ability of each metallogenic block to produce different types of metallogenic tectonic units; and analyzing the delineated metallogenic tectonic units to determine the first-order favorable metallogenic tectonic unit types. This application utilizes the significant control effect of tectonic unit boundaries on the mineralization of sandstone-type uranium deposits, systematically evaluates the metallogenic potential of different tectonic units, and identifies tectonic units with metallogenic advantages. This allows for precise targeting of preferred exploration areas for sandstone-type uranium deposits, opening up new directions for promoting uranium prospecting practices.

The embodiment of the invention relates to the field of testing or analyzing ground materials by means of measuring chemical or physical properties of materials, in particular to a method for circling a metallogenic prospective area of a sandstone type uranium ore in a sedimentary basin. According to the method, soil samples with different granularities are obtained, the content of uranium and the content of thorium in the soil samples are determined respectively, and the potential value of deep uranium mineralization of each sampling point is obtained so as to indicate the deep uranium mineralization potential of a sampling area; by analyzing the molybdenum content in the soil sample with the small granularity, deep metallogenic information of the sampling area is further reflected through the abnormity of the molybdenum content; according to the potential value and the molybdenum content of deep uranium mineralization, deep uranium mineralization information can be reflected more comprehensively, and the accuracy of circling a mineralization prospective area is improved; in the implementation process, only superficial soil samples need to be collected, the field work difficulty is reduced, and the uranium prospecting efficiency is improved.

The application discloses a method for determining the distribution range of a closed brine formation capable of storing CO2 underground, comprising the following steps: determining the development horizon and thickness of the brine formation according to drilling data; determining the planar distribution range of the brine formation capable of storing CO2 according to the development horizon and thickness in combination with seismic data; determining the distribution range of the open brine formation capable of exchanging with surface water in the denudation area; determining the distribution range of the open brine formation capable of exchanging with surface water in the central fault development area of the basin; and subtracting the distribution range of the two open brine formations from the planar distribution range of the brine formation capable of storing CO2 to obtain the distribution range of the closed brine formation. The method has the beneficial effect that the planar distribution range of the brine formation is determined first, then the interference range is removed, and finally the distribution range of the brine formation capable of storing CO2 is obtained, thereby providing a quick solution for determining the target area of the brine formation when carrying out the CO2 geological storage research in the sedimentary basin, and improving the work efficiency.

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 a method and a system for reconstructing a structure-heat history of a marine carbonate rock stratum, and belongs to the technical field of reconstruction of the structure-heat history in the field of sedimentary basin thermal evolution. The method includes reconstructing a tectonic-thermal history of a first marine carbonatite formation with a low-temperature thermal chronology paleo-temperature scale; reconstructing the structure-heat history of the second marine carbonate rock stratum by using the cluster isotope paleo-temperature scale; the tectonic-thermal history of the marine carbonatite formation is coupled and reconstructed based on the tectonic-thermal history of the first marine carbonatite formation and the tectonic-thermal history of the second marine carbonatite formation. According to the method, the low-temperature thermal chronology paleo-temperature scale and the carbonate rock cluster isotope paleo-temperature scale are combined, complemented and constrained to couple and reconstruct the complete and fine structure-thermal history experienced by the deep marine carbonate rock stratum.

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 invention belongs to the technical field of recognition methods, particularly relates to a method for recognizing a deep-ultra-deep seismic section structure-stratum interface based on a well-earthquake-outcrop of a sedimentary basin, and mainly solves the problems that the number of deep-ultra-deep drilling wells is small, the quality of a seismic section is low, and target horizon information basin-mountain comparison is difficult. And an additional constraint means is provided for identification and determination of a deep layer-ultra-deep layer interface in an exploration research area with few well patterns in the early exploration stage. By acquiring related geological data such as drilling, outcrop and earthquake in a target area, a drilling-outcrop interface comparison scheme can be established based on a contact relationship between a rock composition sequence of a field outcrop area and the drilling well and a stratum. On the basis of the comparison scheme, potential wave group reflection characteristics of the target deep-ultra-deep geological interface on a seismic section and contact types of upper and lower strata of the interface are determined; and further through the potential seismic reflected wave group and the interface contact type, the identification and tracking of the target horizon on the seismic section are restrained.

The invention relates to the technical field of applied geology, and discloses a coverage area rock augmentation height quantitative recovery method based on big data, which comprises the following steps: S1, obtaining a clastic zircon sample in a sedimentary basin of a research area, measuring U-Pb age and trace element data of the clastic zircon sample, and constructing a multi-dimensional clastic zircon database; s2, screening the data in the step S1, and removing Th / Ult; 0.1, Legt; the zircon data is 1 ppm, and the zircon from the S-type granite source is excluded. According to the coverage area rock augmentation height quantitative recovery method based on the big data, a technical chain of earth crust thickness inversion-paleo-elevation reconstruction is constructed based on multi-dimensional chipping zircon geochemical data, the denudation preservation state and development potential of mineral resources can be quantitatively analyzed, the method has universal guiding significance for deep prospecting, and the method is suitable for large-scale popularization and application. In the aspects of resource economy evaluation and exploration decision making, direct correlation analysis of denudation amount and buried depth data is realized.

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.

A method for predicting a mineral composition of an evaporite penetrated by a first portion of a wellbore following a planned wellbore path through a sedimentary basin and determining an observed mineral composition of the evaporite. A non-transitory computer readable medium storing instructions executable by a computer processor including receiving a history of sea-level for a sedimentary basin, using a seawater evaporation model to predict a salinity threshold and produce a seawater evaporation curve, where the seawater evaporation curve includes an amount of minerals contained in a body of seawater as a function of salinity, identifying depositional portions of the history of sea-level, and developing a mathematical model to generate the geological-time dependent salinity curve based on the depositional portions of the history of sea-level.

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.

The invention provides a geochemical method for sediment source evolution analysis and paleoenvironment reconstruction, and relates to the technical field of geochemistry, and the geochemical method comprises the following steps: carrying out component separation treatment on a core sample to obtain an authigenic carbonate component and a terrestrial source debris component; respectively carrying out element content test and Sr isotope ratio test on the authigenic carbonate component and the terrestrial debris component; based on the element content test result of the terrestrial source detritus component and the Sr isotope ratio test result, analyzing to obtain a sediment source evolution result; and based on the element content test result of the authigenic carbonate component and the Sr isotope ratio test result, analyzing to obtain a sedimentary paleoenvironment evolution result and a recording result of paleowater element geochemical information. According to the method, the sedimentary paleoenvironment reconstruction and the material source evolution analysis can be carried out through the authigenic carbonate component and the terrestrial source clastic component in the non-pure carbonate rock sedimentary region, and a new thought is provided for the sedimentary paleoenvironment reconstruction and the material source evolution analysis of the oil-gas-containing sedimentary basin.

The invention provides a sedimentary basin natural hydrogen resource quantity calculation method and application thereof, and relates to the technical field of resource exploration, and the method comprises the following steps: determining the total hydrogen production rate, capture efficiency, hydrogen loss rate and hydrogen residence time of a target area, and calculating the geological resource quantity of natural hydrogen in the target area by using a material balance method; wherein the total hydrogen production rate comprises a hydrogen generation rate from at least one of serpentine reaction, radioactive radiolysis and deep mantle degassing; the capture efficiency is the proportion of effective storage of the generated hydrogen by the geological trap; the hydrogen loss rate is the annual loss amount of hydrogen in the underground system due to physical, chemical and biological loss mechanisms; the hydrogen residence time is the time when the hydrogen stays in the geologic body and is stored. According to the method, key parameters such as the total hydrogen production rate, the capture efficiency, the hydrogen loss rate and the residence time are comprehensively considered, and the natural hydrogen geological resource quantity calculation model suitable for the sedimentary basin scale is constructed for the first time.

The application discloses a sand body quantitative prediction method based on source-sink material conservation, which comprises the following steps: calculating the annual average supply of a source area around a sedimentary basin through a sediment flux calculation model; calculating the product of the stratigraphic deposition time of the source area and the annual average supply to obtain the supply of the source area; calculating the total deposition of a deposition area in each source direction of the sedimentary basin through a deposition amount calculation formula; calculating the difference between the source supply of the source area and the total deposition of the deposition area as a deposition difference; substituting the deposition difference into the deposition amount calculation formula to inversely calculate the possible distribution area of the sand body under the condition that the stratigraphic thickness is the largest, and the possible development thickness of the stratigraphic layer under the condition that the sand body has the largest area; and predicting the development scale of the sand body in a depression area based on the distribution area and the development thickness. The application can quantitatively predict the development scale of the sand body in a low exploration degree and low data quality area, and provide a geological basis for sand body distribution description and exploration and development well site deployment in a coal measure stratum depression area.

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.