15 results about "Denudation" patented technology

The invention relates to the technical field of petroleum geophysical exploration, and provides a reservoir forming period hydrocarbon source rock paleo-pressure quantitative prediction method and system, and the method comprises the steps: solving the stratum denudation thickness based on a mudstone compaction curve extrapolation method; obtaining the thickness of a terrain skeleton, constructing a binary function based on the stratum denudation thickness and the thickness of the terrain skeleton to analyze an approximate solution, and inverting the stratum paleo-burial depth for the logging paleo-burial depth; obtaining the total porosity of the hydrocarbon source rock according to the stratum paleo-burial depth; quantitatively predicting the single well paleo pressure of the hydrocarbon source rock according to the total porosity; the multi-well paleo pressure is obtained based on the single well paleo pressure, interpolation is performed according to the multi-well paleo pressure to obtain the plane paleo pressure, in this way, the accurate well logging compaction trend line is established, the accuracy and reliability of the prediction result are improved by considering the influence of the shear wave speed, and therefore the accuracy of predicting the paleo pressure of the hydrocarbon source rock in the reservoir forming period is improved.

The embodiment of the invention discloses a stratum denudation data determination method and device, equipment and a medium. The method comprises the following steps: determining a target layer, a Shanghai generic surface and a Shanghai generic surface of which stratum denudation data needs to be calculated; wherein the upper marine flooding surface is located above the top surface of the target layer and closest to the top surface of the target layer, and the lower marine flooding surface is located below the bottom surface of the target layer and closest to the bottom surface of the target layer; determining denudation points according to the target layer and the underlying stratum; wherein the underlying stratum is a stratum located between the bottom surface of a target stratum and a lower sea flooding surface; and determining the stratum denudation amount according to the thickness between an upper line extending upwards in the stratum direction from the denudation point and the bottom surface of the target stratum. According to the scheme, the stratum denudation amount can be determined more accurately and quickly according to the stratum characteristics and the seismic data which are easy to obtain, higher practicability is achieved, and basic data are provided for later-stage structural analysis, hydrocarbon source rock evolution, oil and gas accumulation condition analysis and the like.

The invention discloses a gas content prediction method and device, electronic equipment and a medium. The method comprises the following steps: establishing a rock physical model, and inverting model parameters through pre-stack AVO; on the basis of a rock physical model, TOC and porosity are calculated through model parameters; the formation pressure is predicted, and the gas content is obtained through TOC, porosity and formation pressure fitting. According to the method, the influence of formation pressure is considered, the method is suitable for shale gas dissipation caused by formation exposure, denudation, structural fracture and the like, the prediction result precision is remarkably improved, and the method better conforms to the actual underground geological condition.

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 tectonic evolution method and device for recovering denudation strata through trend-structure extrapolation of an extended fractured basin, and the method comprises the steps: collecting geology, earthquake and logging information of the extended fractured basin, and building a three-dimensional geologic model of the extended fractured basin; carrying out horizon interpretation on a two-dimensional earthquake and a three-dimensional earthquake in a research area through seismic event stratum tracking by combining seismic reflection characteristics and drilling data on the basis of a synthetic seismic record calibration stratum; carrying out unconformity interface and fracture interpretation on the stretching fault basin, establishing a construction model, dividing stratums corresponding to the unconformity interface of the stretching fault basin, and determining formation time, distribution and evolution of the stratums; establishing a typical structure style, and selecting a typical profile; the denudated syngenetic fault and / or boundary fault and the stratum are / is recovered; and extrapolating and recovering the denudation fault and the stratum through a trend-structure external technology, and recovering a structure evolution history diagram. According to the method, the denudated stratum can be reliably recovered.

The present application belongs to the technical field of seismic data comprehensive interpretation, and specifically discloses a method for evaluating hydrocarbon source rock hydrocarbon generation potential, comprising the following steps: S1, establishing a stratigraphic framework; S2, selecting a corresponding method according to the denudation relationship to restore the denudation thickness, adding the present residual stratigraphic structure to obtain the paleogeomorphology after the denudation thickness is restored; S3, obtaining the relationship between the depth and the porosity by statistical fitting, performing compaction recovery, and then superimposing the stratigraphic structure during the sedimentary period to obtain the paleogeomorphology of the hydrocarbon source rock in the study area during the sedimentary period; and S4, obtaining the depth at which the target type hydrocarbon source rock starts to generate hydrocarbon, and the range greater than the depth at which the target type hydrocarbon source rock starts to generate hydrocarbon in the paleogeomorphology of the hydrocarbon source rock in the study area during the sedimentary period obtained in step S3 is the hydrocarbon generation kitchen of the target type hydrocarbon source rock, which is a region with greater hydrocarbon generation potential of the target type hydrocarbon source rock. The present application improves the recovery accuracy of the paleogeomorphology and guarantees the accuracy of the oil and gas reservoir exploration resource information. The present application is suitable for oil and gas reservoir exploration and development.

The invention discloses a stratum denudation thickness calculation method, which comprises the following steps: acquiring different-depth ground temperature data of a target stratum through a thermal advection coupling ground temperature field inversion model, extracting paleo-temperature data of a fluid inclusion in a rock core sample by using a fluid inclusion paleo-temperature scale denudation model, and determining paleo-ground temperature gradient change characteristics; processing mudstone porosity data by adopting a mudstone compaction curve dynamic fitting algorithm, establishing a dynamic relationship between the porosity and the buried depth, and optimizing a compaction curve; the data are input into a three-dimensional stratum denudation modeling analysis platform, a target stratum three-dimensional space structure model is constructed, modeling parameters are adjusted in combination with ground temperature gradient change and ancient ground temperature evolution characteristics, and the stratum denudation process is simulated; and finally, according to a simulation result and mudstone compaction degree parameters, calculating denudation thicknesses of different positions of the target stratum. According to the method, through cooperative application of multiple models and an algorithm, the accuracy of stratum denudation thickness calculation is improved.

The present application relates to geological exploration evaluation and geological dating technical field, disclose a kind of carbonate rock U-Pb dating detection method, comprising: to be tested sample is carried out denudation test, determine the denudation laser first spot size suitable for to be tested sample;The first laser frequency when the denudation laser of to be tested sample is first spot size and the depth-width ratio of the denudation pit of to be tested sample is consistent with standard depth-width ratio is calculated;Test sequence is set, and to be tested sample is tested;Determine the age data and initial lead composition of the diagenetic mineral of to be tested sample.The present application is suitable for the way that carbonate rock U-Pb dating detection is determined by laser parameter first, then carries out U-Pb dating detection to carbonate rock, avoid the age deviation caused by the depth-width ratio of sample and standard sample denudation pit inconsistency, also can set different size spot and denudation frequency to standard sample and unknown sample in same sequence, both ensure that the depth-width ratio of denudation pit is consistent, also effectively save standard sample.

The invention provides a quantitative evaluation method for contribution of coal-series hydrocarbon source rock exhaust to a gas reservoir under a lifting denudation background, and the quantitative evaluation method comprises the following steps: measuring the methane content and the methane carbon isotope ratio of the coal-series hydrocarbon source rock exhaust; respectively determining the methane content and the methane carbon isotope ratio of the original gas reservoir and the current gas reservoir of the target gas reservoir; and according to the balance principle of methane carbon isotopes in the gas reservoir, establishing a calculation formula of the contribution of the coal hydrocarbon source rock exhaust to the gas reservoir based on the methane content and the carbon isotope mixing ratio, and calculating to obtain the contribution ratio of the hydrocarbon source rock exhaust to the gas reservoir. According to the quantitative evaluation method provided by the invention, the contribution proportion of coal series hydrocarbon source rock exhaust to the gas reservoir under the lifting denudation background is solved based on a material balance principle, quantitative evaluation of gas reservoir contribution is realized, scientific exhaust parameters are provided for large-scale gas gathering basin resource evaluation under the lifting denudation effect, and the method is suitable for large-scale gas gathering basin resource evaluation. The method has important application value in natural gas geology research and exploration.

The invention discloses a denudation method, a denudation device, denudation equipment and a medium in a structural physical simulation experiment. The denudation method in the tectonic physical simulation experiment comprises the steps that an initial experiment model is determined according to geological information of a target tectonic area, and tectonic deformation parameters are determined according to the geological information; determining a three-dimensional elevation map of the target tectonic area according to the geological information; determining denudation parameters according to the three-dimensional elevation map; according to the denudation parameters and the tectonic deformation parameters, the initial experiment model is experimented, and a final experiment result is obtained. According to the scheme, the tectonic deformation parameters are determined according to the denudation parameters and the geological information determined according to the three-dimensional elevation map, automatic denudation is performed on the initial experiment model of the target tectonic area in the denudation experiment process, the denudation experiment result is closer to the finally expected experiment result, and the efficiency and the accuracy of the tectonic physical simulation experiment are improved.

The application discloses a method for quantitatively characterizing and predicting deep formation water chloride content, and relates to the technical field of exploration and development of deep-ultra deep tight sandstone gas reservoirs; the method comprises the following steps: recovering burial history and thermal evolution history of the target layer; quantitatively characterizing water-rock reaction intensity; quantitatively characterizing and evaluating evolution process of formation water chloride content; recovering burial history and thermal evolution history of the target layer comprises the following steps: stratifying the formation by using multiple data means; in combination with formation tectonic movement background, recovering denudation thickness and denudation time by using formation trend line method. The application can accurately and rapidly quantitatively characterize and evaluate the evolution process of deep-ultra deep formation water chloride content by analyzing formation burial process, thermal evolution history and formation water conventional geochemical data and the like. The analysis process is simple and easy to realize, and the required data are less, so that the application is a quick method capable of quantitatively analyzing formation water properties in different periods.

The invention discloses a multi-stage difference uplift area ancient landform restoration method, and the method comprises the following specific steps: S100, carrying out the detailed interpretation of a seismic section, and recognizing a main unconformity surface; s200, finding out a stratum denudation original point and a maximum denudation point position, solving a stratum thinning rate, and calculating an original thickness of a denudation section; s300, an original deposition boundary is determined on the seismic backbone section, and denudation thickness recovery is carried out in combination with the residual thickness map; s400, identifying the mark layer; and S500, recovering the form of the ancient landform by using a marker bed-thickness analysis method based on a residual thickness method and an impression method. According to the method, partition difference recovery of stratum denudation thicknesses of different structure parts by tectonic movement is comprehensively considered, deposition-settlement compensation consistency is considered, the paleo-structure recovery precision is higher, the situation that whether erosion depression and residual hillocks exist on a paleo-erosion surface after paleo-denudation is not considered in a paleo-landform recovery method is improved, and the recovery efficiency of the paleo-landform recovery method is improved. And the problems of incomplete factors and limitation are solved.

The application discloses a kind of palaeo-source-sink system reconstruction method and system, its method includes: obtaining the residual palaeo-source-sink system of the stratum palaeo-source-sink system to be built, the residual palaeo-source-sink system includes residual denudation source area and residual sedimentary area;According to the geomorphic feature of residual denudation source area and the geomorphic feature of residual sedimentary area, the denudation amount of residual denudation source area is recovered, and the denudation source area recovery amount is obtained;According to the geomorphic feature of residual sedimentary area, the denudation amount of residual sedimentary area is recovered, and the sedimentary area recovery amount is obtained;The reconstruction is carried out in combination with the denudation source area recovery amount, the sedimentary area recovery amount and the residual system, and the complete palaeo-source-sink system is obtained;Therefore, without the workload of a large amount of analysis test data, the reconstruction work of ancient continental facies lake basin palaeo-source-sink system can be completed, and the exploration work of oil and gas can be effectively guided.

The invention belongs to the technical field of basin simulation, and particularly relates to a mudstone compaction extrapolation method applicability discrimination method based on sound wave and density logging. The method comprises the following steps of: 1, selecting a continuous mudstone section to sample data points, valuing interval transit time delta tma of a rock skeleton, and drawing a plumbing relational graph; 2, identifying stratum interfaces with different interval transit time data convergence trends of upper and lower stratum mudstone sections according to the convergence trend of discrete distribution of data points; 3, obtaining a fitting straight line of each data point group segment or data point group segments above and below the target unconformity surface; 4, the difference between the buried depth corresponding to the baseline value delta t0 in the fitted curve and the buried depth corresponding to the researched unconformity surface is obtained, and the assumed stratum recovery denudation amount H is obtained; 5, obtaining the function relationship rho '(Z) of the density of the destination stratum group section with respect to the buried depth through logarithm fitting, and 6, calculating the recovery pressure Pb and the current pressure Px, and comparing the values of the recovery pressure Pb and the current pressure Px.

The invention relates to the technical field of coastal landform monitoring, and discloses an intertidal zone salt marsh front edge erosion autonomous monitoring system and a data processing method. According to the invention, through the design of the anti-corrosion main support structure and the modular hoop, and in combination with the waterproof electronic cabin, the long-term operation stability and the equipment survival rate of the system in an intertidal zone high-salt, high-humidity and strong-wave impact environment are improved; a control strategy based on tide forecast is adopted, a distance measuring sensor is driven to carry out high-frequency sampling in an effective observation window, and the whole event collapse process is completely recorded; through fusion of multi-stage signal quality control, median representative value extraction and a robust statistical recognition algorithm based on a dynamic threshold, real block collapse events are automatically discriminated from high-interference original data, and continuous denudation and sudden erosion mechanisms can be reliably distinguished; and finally, automatic comparison and verification are carried out by means of time sequence images, complete event parameters are output, and data support is provided for analyzing the salt marsh front edge erosion dynamic process and establishing a prediction model.