22 results about "Sequence stratigraphy" patented technology

The invention relates to the technical field of wind power road geological analysis, in particular to a three-dimensional geological modeling and section visualization method and system for wind power road construction. The method comprises the following steps: establishing a geological drilling data matrix through geological drilling data; extracting geological attribute data through lithology analysis, calibrating the relationship of each stratum through sequence analysis, constructing a standardized geological drilling data set, constructing a spatial continuous geological attribute scalar value distribution model through a Gaussian process interpolation algorithm, and constructing an implicit function by taking the geological attribute scalar value distribution model as the implicit function. And generating a three-dimensional geologic model through a contour surface extraction algorithm, carrying out geologic attribute scalar value extraction on the three-dimensional geologic model based on the road route data, generating wind power road profile data, and visualizing a data result. An efficient and low-cost solution is provided for geological judgment and optimization in wind power plant road design, the requirements for accuracy and high efficiency of engineering projects are met, and reliable guarantee is provided for wind power road construction.

Disclosed are methods, systems, and computer programs that determine stratigraphic marker data for energy development operations at a resource site. According to one embodiment, the methods include generating a stratigraphic model for the resource site. The stratigraphic model, for example, comprises a machine learning model having one or more parameters. The methods also include configuring the stratigraphic model using training data following which the trained stratigraphic model is used to generate, based on data captured at the resource site, stratigraphic marker data or geological facies data for the resource site. The stratigraphic marker data or geological facies data comprises geological sequence boundary data indicating uniform or non-uniform sediment deposition information or geological layering information associated with the resource site.

The present invention belongs to the technical field of petroleum and natural gas exploration. Provided are an intelligent seismic high-frequency sequence interpretation method and apparatus using logging information. The method comprises: inputting, into a sequence stratigraphy prediction model in a current state, seismic attribute data of determined point locations, which are determined on the basis of a sequential path, along a well-tie seismic trace of a known conditioning well in a target block, so as to obtain high-frequency sequence stratigraphy data of the determined point locations; and determining whether any high-frequency sequence stratigraphy data of a point location in the target block has not been obtained, and if any high-frequency sequence stratigraphy data of a point location in the target block has not been obtained, adding the high-frequency sequence stratigraphy data of the determined point locations to sequential simulation conditioning data, using updated sequential simulation conditioning data to construct a learning sample to train the sequence stratigraphy prediction model in the current state, and then jumping to the previous step to perform high-frequency sequence stratigraphy prediction on the next determined point location determined on the basis of the sequential path. The method can be applied to onshore early-exploration blocks and offshore sparse-well blocks, etc., so as to realize high-frequency sequence interpretation of these blocks with high efficiency, low costs and high accuracy.

The application discloses a kind of based on sequence stratigraphy and seismic sedimentology's braided river channel reservoir fine characterization method, comprising the following steps: obtaining target area core, well logging and high-resolution three-dimensional seismic data;By analyzing the sedimentology mark and logging facies mark in the target area, to determine the sedimentary facies type and sedimentary microfacies division;Using lithology and well logging curve, using the theory of sedimentology, high-resolution sequence stratigraphy identifies sequence interface type and feature, and carries out high-resolution sequence stratigraphic sequence division;Division reservoir architecture interface;According to the internal structure of sedimentary system, sedimentary facies distribution, focus on high-frequency sequence and sedimentary body scale, generate the braided river channel reservoir fine characterization result of target area architecture unit.The present application effectively solves the deficiencies of prior art in reservoir fine description, boundary identification and parameter inversion, improves the efficiency and success rate of oil and gas reservoir development.

The application discloses a kind of quantitative description fault inversion process method based on balanced section, comprising the following steps: S1: selecting geological profile;S2: division different inversion stage sequence stratigraphy;S3: determine the geologic time of different activity stages of inversion fault;S4: use balanced section technology to restore the evolution history of inversion fault;S5-S7: calculate the slip distance of different stages inversion fault, and calculate the slip rate, inversion intensity coefficient of different inversion stages;S8: establish equivalent point distance, total slip distance, slip rate and inversion intensity coefficient trend chart with geologic time variation, the application is suitable for basin structural analysis technical field, introduce balanced section technology, can more accurately restore fault inversion process;Moreover, can clearly, accurately, quantitative characterization fault inversion process from fault slip distance, the activity intensity of different stages and inversion intensity etc., facilitate different inversion structure contrast, basin structural analysis etc. work is carried out.

The application discloses a method and device for determining sequence boundaries of high-frequency seismic sequence strata, which comprises the following steps: generating a relative geologic time model according to a three-dimensional seismic data body, extracting an initial seismic-based medium-low-frequency first sequence boundary data body, extracting a seismic-based first-time sequence boundary curve, performing baseline removal, obtaining a seismic-based second sequence boundary data body through first-time waveform difference inversion, extracting a seismic-based third-time sequence boundary curve as a base curve, fusing the base curve with a gamma curve, a porosity curve, a carbonate rock particle curve, a carbonate rock texture curve, a carbonate rock suture line frequency curve, an asphalt content curve and a dolomite content curve which reflect sequence boundaries, and obtaining a seismic-based high-frequency third sequence boundary data body through second-time waveform difference inversion after the fusion, and finally identifying high-frequency seismic sequence boundaries with very high precision.

A method comprising obtaining a thickness for each of one or more sediment packages of a subsurface formation. The method comprises generating a thickness profile of each of the one or more sediment packages based on the thickness. The method comprises obtaining one or more properties of each of the one or more sediment packages based on the thickness profile. The method comprises generating, via a learning machine, one or more sediment package classifications based on the one or more properties. The method comprises and performing a subsurface operation based on the one or more sediment package classifications.

This invention discloses a method, apparatus, equipment, and medium for analyzing the gas-water distribution in braided river sandstone gas reservoirs. The method includes: establishing a high-frequency sequence stratigraphy framework for the target layer based on the lithology of the core sample of the target layer in the braided river sandstone gas reservoir to be analyzed, and the corresponding well logging curves; performing sedimentary facies profile distribution analysis on the target layer; analyzing the gas reservoir type based on the results of the high-frequency sequence stratigraphy framework and sedimentary facies profile distribution analysis; and determining the gas-water distribution boundaries and gas layer units according to the gas reservoir type. Using this invention, the gas-water distribution in braided river sandstone gas reservoirs can be analyzed, solving the problem of complex gas-water distribution and difficulty in accurately determining the gas-water distribution in braided river sandstone gas reservoirs.

The application discloses a kind of layer sequence stratigraphic correlation method, device, equipment, medium and product.Therein, the method comprises: obtaining the well logging data corresponding to the oil well to be analyzed;According to the multiple natural gamma logging values in the well logging data corresponding to the oil well to be analyzed and natural gamma curve, determine the target base level cycle chart corresponding to the oil well to be analyzed;According to target base level cycle chart, the layer sequence stratigraphy of oil well to be analyzed is divided, to determine at least one layer sequence stratigraphic unit corresponding to the oil well to be analyzed;According to the preset feature comparison order, in turn, the layer sequence stratigraphic unit corresponding to the oil well to be analyzed and at least one to be compared layer sequence stratigraphic unit corresponding to the oil well to be compared, which is determined in advance and corresponds to the oil well to be analyzed, are compared in feature, to determine at least one stratigraphic unit matching set corresponding to the oil well to be analyzed.The technical scheme realizes the effect that the layer sequence stratigraphic unit of different oil wells is compared in feature accurately and quickly.

This invention discloses a method, system, and application for fine characterization of multi-scale sedimentary cycles facies space. This method combines variational mode decomposition (VMD) with synchronous compression optimal basis wavelet transform (MCB) to propose a workflow for multi-scale sedimentary cycle characterization. First, the relationship between geological structures at different scales and intrinsic mode functions (EMFs) is theoretically derived, and a method for determining the number of EMFs is proposed. Considering computational efficiency and the lateral continuity of the decomposition results, the variational mode decomposition algorithm is improved by determining the number of EMFs and their center frequencies based on the smoothed reflection coefficient amplitude spectrum. Based on this, multi-scale sedimentary cycle characterization is achieved by combining MCB with ridge extraction. The key parameters in the processing of this invention are all extracted from seismic data, making the operation simple, computationally fast, and suitable for processing massive amounts of seismic data. This provides an important tool for subsequent sequence stratigraphy research.

A method for reconstructing the lithofacies paleogeography of basin-based marine strata based on tectonic-sedimentary coupling addresses the difficulty of existing methods in achieving comprehensive, multi-factor quantitative reconstruction of the lithofacies paleogeography of basin-based marine strata. This method, guided by plate tectonics, geotectonic geology, sedimentary petrology, sequence stratigraphy, and geochemistry, fully utilizes basic geological data and employs balanced profiling techniques, macro-microscopic integration, spectral analysis and core retrieval, well-seismic integration, and single-factor analysis and multi-factor comprehensive mapping. This method identifies key unconformities, restores the basin's prototype basement, defines the basin's nature and source-sink system, establishes a stratigraphic division scheme, and constructs a tectonic and sedimentary evolution model for the basin. This method then reconstructs the lithofacies paleogeography of the basin's marine strata within each sequence. This method can determine the tectonic-sedimentary pattern and lithofacies paleogeographic characteristics, and comprehensively reconstructs the lithofacies paleogeography of the basin's marine strata based on multiple factors, providing support for oil and gas reserve enhancement and exploration deployment.

The invention belongs to the technical field of oil-gas exploration, and discloses a carbonate rock stratum sequence stratigraphic quantitative division method based on element geochemistry, which comprises the following steps: S1, sampling rocks, and drawing a stratigraphic histogram and sampling point horizon; s2, the obtained samples are screened, and fresh flour of the selected samples is ground into powder for preparation; s3, testing the prepared sample powder to obtain geochemical test data; s4, key indexes for identifying third-level and fourth-level sequence interfaces are determined, and values of the key indexes are projected on the stratigraphic section according to the depth. The method has the advantages that according to the characteristic that the change of the ancient sedimentary environment can cause rising and falling of the sea level, so that stratigraphic records have different geochemical response characteristics; the geochemical elements are innovatively introduced to quantitatively divide the stratigraphic sequence, the problem that only the stratigraphic sequence can be qualitatively divided in the prior art is solved, and the precision and accuracy of carbonate rock stratigraphic sequence recognition are improved.

The present invention discloses a high-precision velocity field construction method for horizontal well development combined with well-seismic data. The method is first based on the fine structural interpretation of small layers under the constraints of sequence stratigraphy. Through velocity simulation under seismic constraints, the technical problems of low vertical resolution of velocity fields and inter-well modeling in conventional methods are effectively solved, and a high-precision velocity field in the medium and deep layers is established. Secondly, in order to solve the problem of missing velocity curves in shallow layers, the velocity spectrum after well calibration is used to establish a near-surface velocity field. Then, an adaptive optimal value selection algorithm is used to effectively integrate the shallow layer velocity field with the medium and deep layer velocity field to form a complete high-precision three-dimensional velocity field model. Finally, the marker layer inverted triangle layer-by-layer approximation method is used, relying on new drilling data, to continuously correct the velocity model and achieve high-precision structural model updates that accompany the entire life cycle of oil reservoir development. The present invention belongs to the field of oil and gas extraction technology and can reduce the structural error of the "sweet spot" of thin shale oil layers, thereby ensuring the precise entry of horizontal wells into the target.

The present invention discloses a three-dimensional reservoir configuration modeling method, which relates to the field of reservoir configuration technology. The method includes establishing a basic database, identifying and dividing configuration units, identifying and characterizing single sand bodies, evaluating reservoir connectivity quality, and modeling reservoir configuration. The method comprehensively applies the research results of sequence stratigraphy, sand body planar distribution patterns, sand body superposition and interlayer patterns, sand body scale, and reservoir physical properties to establish three-dimensional structural models, phase models, and reservoir attribute models for different types of reservoirs. The established three-dimensional geological model can reflect the sedimentary characteristics of different reservoirs and the distribution characteristics and variation patterns of reservoir attributes in three-dimensional space. It can also explain the sedimentary genesis mechanism of reservoirs of different sedimentary system types, providing a scientific and reasonable geological model for the subsequent prediction of remaining oil distribution.

This invention relates to a multi-dimensional well logging lithology identification method and apparatus. The method includes acquiring current well logging data of a well to be tested; performing sequence stratigraphy on the well to obtain sedimentary sequence stratigraphy results based on the current well logging data; dividing the current well logging data into data segments of different sequences based on the sedimentary sequence stratigraphy results; inputting the data segment of each sequence into a lithology identification model for lithology identification to obtain the lithology probability distribution corresponding to each sequence; and performing geological constraint correction on the lithology probability distribution based on the continuous depth on the well to obtain the final lithology identification result. This invention performs sequence stratigraphy on the well to be tested, thereby enabling lithology identification of data segments of different sequences, obtaining well logging performance in different strata, and combining geological information to perform geological constraint correction on the lithology probability distribution, thus combining geological information with well logging data and improving the lithology identification effect.

A method for determining sequence boundaries in high-frequency seismic sequence stratigraphy. The method comprises: generating a relative geological time model on the basis of a three-dimensional seismic data volume; extracting an initial seismic-based medium-low frequency first sequence boundary data volume; extracting a seismic-based medium-low frequency first sequence boundary curve; then, performing baseline removal processing; then, obtaining a seismic-based second sequence boundary data volume by means of a first waveform difference inversion; then, extracting a seismic-based third sequence boundary curve to serve as a basic curve and fusing same with a gamma curve, a porosity curve, a carbonate rock grain curve and a carbonate rock texture curve, that reflect high-frequency sequence boundaries, and a carbonate rock stylolite frequency curve, a carbonate rock asphalt content curve and a carbonate rock dolomite content curve that reflect sequence boundaries; then, performing a second waveform difference inversion to obtain a seismic-based high-frequency third sequence boundary data volume; and then identifying high-frequency seismic sequence boundaries. Thus, high precision is achieved. The present application further relates to an apparatus for determining sequence boundaries in high-frequency seismic sequence stratigraphy.

This application discloses a method, apparatus, equipment, and storage medium for characterizing ancient spreading ridge formation systems, relating to the field of data processing technology. The method includes: acquiring multidimensional geological and geophysical data characterizing the ancient spreading ridge formation system; determining target feature data for the study area based on the multidimensional geological and geophysical data; wherein the target feature data includes the geomorphic features, sequence stratigraphy, development location and extension length of fault systems, igneous diapiric structures, and the distribution of magnetic anomaly bands in the study area; constructing a corresponding scene of geomorphology, sequence stratigraphy, and fault systems based on the target feature data, determining the dynamic mechanism of the ancient spreading ridge development process, and then constructing a geological model characterizing the ancient spreading ridge formation system. By comprehensively considering multiple factors in the development of the ancient spreading ridge formation system, it is possible to explain in detail the geodynamic mechanism of the ancient spreading ridge formation system characterization process and to more closely approximate the tectonic-sedimentary evolution process of the actual ancient spreading ridge.

The invention discloses a classification method for a stratigraphic structure driving mechanism of a fracture-subsidence sequence, and the method comprises the steps: determining well-seismic matching parameters, and carrying out the seismic horizon calibration of a target work area; identifying a second-level sequence interface and a third-level sequence interface by using a typical earthquake termination relationship; drawing a stratum thickness map of each sequence; drawing a fault displacement change curve of the fault in each sequence; recovering the ancient landform of the target work area in the deposition period by using an impression method to obtain an ancient landform map; determining the construction activity intensity of each sequence of the target work area; obtaining an absolute sea level ratio change curve and a global climate change curve; recovering a relative sea level lifting curve and a relative sea level changing curve; and according to the tectonic activity intensity, the absolute sea level ratio change curve, the global climate change curve and the relative sea level change curve of the target work area, evaluating and dividing the stratigraphic structure driving mechanism of the fracture subsidence sequence. The method not only enriches research methods of deep sea sedimentology and sequence stratigraphy, but also has positive significance for sand body development prediction of land frame edges.

This invention discloses a method, electronic device, and computer-readable storage medium for predicting fracture development in tight sandstone based on multi-geological parameter coupling constraints. The method includes: first, standardizing the basic geological data of the target tight sandstone gas reservoir area to form a standardized geological database; then, based on the standardized geological database, identifying structural features, lithological features, and sequence stratigraphy, establishing a quantitative coupling control model of "geological structure-sedimentary microfacies-high-frequency sequence stratigraphy," and calculating the comprehensive quantitative value of each feature; finally, based on the comprehensive quantitative value of each feature, classifying favorable fracture development zones. This method, electronic device, and computer-readable storage medium establish a scientific model for predicting fracture development in tight sandstone, improving prediction accuracy and reliability.

The invention discloses a sequence stratigraphy and seismic sedimentology-based fine characterization method for a braided channel reservoir. The method comprises the following steps of: obtaining core, logging and high-resolution three-dimensional seismic data of a target area; determining sedimentary facies types and sedimentary microfacies division by analyzing and researching sedimentary signs and logging facies signs in the target area; the method comprises the following steps: identifying the type and characteristics of a sequence interface by utilizing lithology and a logging curve and applying sedimentology and high-resolution sequence stratigraphy theories, and carrying out high-resolution sequence stratigraphic division; dividing a reservoir configuration interface; and according to the internal structure of the sedimentary system, the sedimentary facies distribution, the focused high-frequency sequence and the sedimentary body scale, generating a fine characterization result of the braided river reservoir of the target area configuration unit. According to the method, the defects in the aspects of reservoir fine description, boundary identification, parameter inversion and the like in the prior art are effectively overcome, and the efficiency and success rate of oil and gas reservoir development are improved.

The application belongs to the field of geophysical exploration, and particularly relates to a method for seismic sequence division based on aurora optimization two-dimensional step-by-step variation mode decomposition, comprising the following steps: obtaining an original two-dimensional seismic signal; based on the original two-dimensional seismic signal, an optimal penalty factor upper limit is solved by using an aurora optimization algorithm; based on the optimal penalty factor upper limit, the original two-dimensional seismic signal is subjected to two-dimensional step-by-step variation mode decomposition to obtain multi-order two-dimensional modes with different central frequencies; based on the multi-order two-dimensional modes, a frequency feature profile is calculated and generated, a cycle curve is extracted, and a sequence division of strata is performed. The method of the application extracts a real mode while ensuring the continuity of a phase axis, avoids a pseudo mode and mode aliasing, and obtains a sequence division result corresponding to a well logging curve cycle analysis result.

The invention discloses a method for quantitatively describing a fault inversion process based on an equilibrium profile. The method comprises the following steps: S1, selecting a geological profile; s2, dividing different inversion stage sequence stratums; s3, geological historical periods of different activity stages of the reverse fault are determined; s4, recovering the evolution history of the reverse fault by using a balance section technology; s5-S7, calculating slip distances of the inversion faults in different stages, and calculating slip rates and inversion strength coefficients in different inversion stages; s8, a trend chart of the equivalent point distance, the total slip distance, the slip rate and the inversion strength coefficient changing along with the geological age is established, the method is suitable for the technical field of basin structure analysis, the equilibrium profile technology is introduced, and the fault inversion process can be recovered more accurately; moreover, the inversion process of the fault can be clearly, accurately and quantitatively represented from the aspects of fault slippage distance, activity intensity and inversion intensity at different stages and the like, and the work of comparison of different inversion structures, basin structure analysis and the like can be conveniently carried out.