CN-121980206-A - Oil and gas exploration data rapid integration method and system based on bidirectional cascade

CN121980206ACN 121980206 ACN121980206 ACN 121980206ACN-121980206-A

Abstract

The application provides a method and a system for quickly integrating oil and gas exploration data based on bidirectional cascade, wherein the method comprises the steps of S1, obtaining an original exploration data stream, carrying out normalization processing to form a standardized initial data body, S2, extracting characteristic points of a transversely distributed seismic reflection interface and lithology turning points of a longitudinally distributed logging, constructing a bidirectional cascade topological skeleton, S3, carrying out waveform similarity propagation of seismic attributes in the transverse direction, carrying out petrophysical parameter recursion of the logging attributes in the longitudinal direction, and generating an intermediate integration data set, S4, obtaining gravity and magnetic exploration data, generating a geological structure background field, carrying out spatial registration and weight superposition, correcting stratum boundary drift, and S5, reversely tracing and updating point-to-point constraint relation in the bidirectional cascade topological skeleton to generate high-precision oil and gas exploration integration data after closed loop verification. The method has the advantages that the precision of integrated data can be effectively improved, and therefore the actual requirements of high-precision oil and gas exploration are met.

Inventors

LI YANG
CHEN DAILIN
XU ZHAOLEI
ZHANG MING
XIE HONGBIN
WANG WEI
ZHANG YUELEI
QIN JIA

Assignees

重庆华地资环科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. A method for quickly integrating oil and gas exploration data based on bidirectional cascade is characterized by comprising the following steps: s1, acquiring an original exploration data stream, and carrying out normalization processing according to stratum depth slices to form a standardized initial data body; S2, based on the standardized initial data body, extracting characteristic points of a transversely distributed seismic reflection interface and logging lithology turning points distributed longitudinally, and constructing a bidirectional cascade topological framework, wherein the bidirectional cascade topological framework defines a point-to-point constraint relation between a seismic section and a logging curve; s3, acting the bidirectional cascade topological skeleton on the standardized initial data volume, performing waveform similarity propagation of seismic attributes in the transverse direction, performing petrophysical parameter recursion of logging attributes in the longitudinal direction, and generating an intermediate integrated data set fused with transverse waveform characteristics and longitudinal petrophysical attributes; s4, acquiring gravity and magnetic exploration data, generating a geological structure background field, performing spatial registration and weight superposition on the middle integrated data set, and correcting stratum boundary drift phenomenon caused by single data source resolution limitation of earthquake or logging; and S5, backtracking and updating the point-to-point constraint relation in the bidirectional cascade topological framework according to the corrected stratum boundary drift result to generate high-precision oil and gas exploration integrated data after closed loop verification.
2. The bi-directional cascade based hydrocarbon exploration data rapid integration method of claim 1, wherein said raw exploration data stream comprises a raw seismic data stream comprising a seismic wave travel time and amplitude envelope and a raw well log data stream comprising a well log acoustic curve.
3. The method of claim 2, wherein the raw survey data stream is resampled and normalized at 2 ms sampling intervals and 5m depth intervals to form the normalized initial data volume.
4. A method of rapid integration of hydrocarbon exploration data based on bi-directional cascades according to claim 1 or 2 or 3, characterized by the specific step of performing waveform similarity propagation of seismic attributes in the lateral direction as follows: S301, traversing each transverse seismic section node in the bidirectional cascade topological skeleton, and reading a seismic wave time sequence corresponding to the transverse seismic section node; S302, calculating waveform cross-correlation function peaks between adjacent seismic section nodes to determine the delay amount of waveform propagation; S303, carrying out weighted smoothing treatment on the amplitude values of adjacent seismic section nodes according to the time delay amount and a preset waveform attenuation factor, and eliminating transverse splicing traces; S304, comparing the amplitude values of the processed adjacent seismic section nodes with the original amplitude envelope, reserving waveform segments with consistent amplitude variation trend, and eliminating distorted waveforms generated by noise interference; and S305, splicing all the seismic section data subjected to the transverse waveform similarity propagation processing, and outputting a seismic attribute data set with enhanced transverse continuity.
5. The method for rapid integration of hydrocarbon exploration data based on bi-directional cascades according to claim 4, characterized by the specific step of performing a petrophysical parameter recursion of logging properties in the longitudinal direction, as follows: S311, along each longitudinal logging curve node in the bidirectional cascade topology framework, reading the acoustic wave time difference and the density logging value corresponding to the longitudinal logging curve node; s312, converting the acoustic time difference and the density logging value into equivalent stratum porosity values according to a pre-established porosity conversion lookup table; S313, recursively calculating a corresponding stratum oil and gas saturation value by taking the stratum porosity value as a basis and combining a preset saturation empirical relationship; s314, combining the stratum porosity value and the stratum oil-gas saturation value into a multidimensional rock physical vector, and mapping the multidimensional rock physical vector to a corresponding stratum depth coordinate; S315, connecting the multidimensional petrophysical vectors on all stratum depth coordinates in series, and outputting a longitudinal petrophysical attribute continuity logging correction data set.
6. The method for rapid integration of oil and gas exploration data based on bi-directional cascade as claimed in claim 5, wherein the method comprises the steps of Performing a formation porosity value conversion, wherein: The value of the formation porosity is indicated, The regional lithology correction coefficients are represented, Representing the read sonic jet lag log values, Representing the acoustic time difference of the regional rock framework, Representing the acoustic time difference of the formation fluid, Representing the read densitometry values, Representing the density of the regional rock skeleton, Representing the density of the formation fluid.
7. The method for rapid integration of oil and gas exploration data based on bi-directional cascade according to claim 1 or 5 or 6, wherein step S4 comprises: s401, acquiring original gravity exploration data, and sequentially performing latitude correction, altitude correction, middle layer correction, topography correction and normal field correction to obtain a Bragg gravity anomaly value reflecting underground density difference; S402, carrying out grid interpolation on the abnormal value of the Bragg gravity in a plane coordinate system, and drawing a Bragg gravity abnormal plane graph which represents the space distribution of the abnormal gravity intensity by using color or contour lines; S403, acquiring original magnetic exploration data, and performing daily change correction and normal field correction to obtain a magnetic anomaly value reflecting the magnetic difference of underground rock; s404, carrying out gridding interpolation on the magnetic anomaly value in a plane coordinate system, calculating a gradient vector of the magnetic anomaly on each grid point in the horizontal direction, and generating a magnetic anomaly vector diagram containing the magnitude of the magnetic anomaly of each grid point and the information of the horizontal direction; s405, reading the Bragg gravity anomaly plan and the magnetic anomaly vector diagram, and performing Fourier transformation; and S406, extracting low-frequency structural trend components, and carrying out inverse Fourier transform to generate a geological structural background field.
8. The method for quickly integrating oil and gas exploration data based on the bidirectional cascade connection according to claim 7, the method is characterized in that the step S4 further comprises the following steps: S407, calculating a construction curvature value of each grid point in the geological structure background field, and generating a weight coefficient based on the construction curvature value; And S408, carrying out spatial registration based on the coordinate position of the preliminary predicted stratum boundary on the plane extracted from the intermediate integrated data set and the weight coefficient.
9. The method for rapid integration of oil and gas exploration data based on bi-directional cascade as claimed in claim 8, wherein the method is characterized by comprising the following steps of Calculating a construction curvature value Wherein: Is provided with Space coordinates of background field of geological structure obtained by inverse Fourier transform reduction The field strength value at the location, Representing the background field of a geological structure The first partial derivative of the direction is used, Representing the background field of a geological structure The first partial derivative of the direction is used, Representing the background field of a geological structure The second partial derivative of the direction, Representing the background field of a geological structure The second partial derivative of the direction, Representing the background field of a geological structure And Mixed second partial derivative of direction.
10. A bi-directional cascade-based oil and gas exploration data rapid integration system for implementing the bi-directional cascade-based oil and gas exploration data rapid integration method according to any one of claims 1 to 9, comprising a data input and preprocessing layer, a core processing engine layer, a multi-source data constraint and correction layer, a closed loop verification and output layer and an advanced application module layer, wherein: The data input and preprocessing layer is provided with a data standardization module which is used for acquiring an original exploration data stream and carrying out normalization processing according to stratum depth slices to form a standardized initial data body; The core processing engine layer is provided with a feature extraction module, a bidirectional cascade topological skeleton, a cascade data processing module and a data fusion module, wherein the feature extraction module is used for extracting the characteristic points of a transversely distributed seismic reflection interface and logging lithology turning points longitudinally distributed on the basis of the standardized initial data volume, the bidirectional cascade topological skeleton is used for defining a point-to-point constraint relation between a seismic section and a logging curve, and the cascade data processing module is used for executing waveform similarity propagation of seismic attributes in the transverse direction and executing petrophysical parameter recursion of logging attributes in the longitudinal direction; The multi-source data constraint and correction layer is provided with a heavy magnetic data processing module and a spatial registration and weight superposition module, the heavy magnetic data processing module is used for acquiring gravity and magnetic exploration data and generating a geological structure background field, and the spatial registration and weight superposition module is used for carrying out spatial registration and weight superposition on the middle integrated data set to obtain a boundary correction result; The closed loop checking and outputting layer is provided with a framework reverse updating module, and the framework reverse updating module reversely backtracks and updates the point-to-point constraint relation in the bidirectional cascade topological framework according to the boundary correction result to generate high-precision oil and gas exploration integrated data after closed loop checking; The advanced application module layer is used for realizing dynamic feedback of fluid identification marks and well vibration calibration.

Description

Oil and gas exploration data rapid integration method and system based on bidirectional cascade Technical Field The invention relates to a data processing technology in the field of oil and gas exploration, in particular to a method and a system for quickly integrating oil and gas exploration data based on bidirectional cascade. Background In the oil and gas exploration process, the seismic data and the logging data of the geophysical prospecting acquisition end and the gravity and magnetic prospecting data are required to be integrated to form a comprehensive and accurate prospecting data model, and data support is provided for oil and gas resource exploration. In the prior art, a step-by-step processing mode is adopted for the integration of oil and gas exploration data, the seismic data and the logging data are firstly subjected to independent standardized processing, then the fusion of multi-source data is realized in a simple superposition mode, and the gravity data and the magnetic data are introduced to carry out auxiliary correction by part of methods, but a depth correlation mechanism between the seismic data and the logging data is not established. In the conventional data integration method, the seismic data and the logging data are in a separation processing state, and a correlation structure capable of penetrating the seismic data and the logging data is lacking, so that precise matching cannot be realized between the seismic waveform characteristics of transverse distribution and the petrophysical properties of longitudinal distribution, and the integrated data have the problem of transverse and longitudinal information disconnection. Meanwhile, the single data source has the resolution difference, the stratum boundary drift phenomenon can not be effectively corrected only by simple superposition, an effective feedback verification mechanism is lacked, dynamic adjustment of deviation in the integration process is difficult, and finally the accuracy of integrated data is insufficient, so that the actual requirement of high-accuracy oil and gas exploration can not be met. Disclosure of Invention Accordingly, the primary objective of the present invention is to provide a method for rapidly integrating oil and gas exploration data based on bidirectional cascade, which can effectively improve the accuracy of integrated data by dynamically adjusting the deviation in the integration process, thereby meeting the actual requirements of high-accuracy oil and gas exploration. In order to achieve the above purpose, the specific technical scheme adopted by the invention is as follows: a method for quickly integrating oil and gas exploration data based on bidirectional cascade is characterized by comprising the following steps: s1, acquiring an original exploration data stream, and carrying out normalization processing according to stratum depth slices to form a standardized initial data body; S2, based on the standardized initial data body, extracting characteristic points of a transversely distributed seismic reflection interface and logging lithology turning points distributed longitudinally, and constructing a bidirectional cascade topological framework, wherein the bidirectional cascade topological framework defines a point-to-point constraint relation between a seismic section and a logging curve; s3, acting the bidirectional cascade topological skeleton on the standardized initial data volume, performing waveform similarity propagation of seismic attributes in the transverse direction, performing petrophysical parameter recursion of logging attributes in the longitudinal direction, and generating an intermediate integrated data set fused with transverse waveform characteristics and longitudinal petrophysical attributes; s4, acquiring gravity and magnetic exploration data, generating a geological structure background field, performing spatial registration and weight superposition on the middle integrated data set, and correcting stratum boundary drift phenomenon caused by single data source resolution limitation of earthquake or logging; and S5, backtracking and updating the point-to-point constraint relation in the bidirectional cascade topological framework according to the corrected stratum boundary drift result to generate high-precision oil and gas exploration integrated data after closed loop verification. Optionally, the raw survey data stream comprises a raw seismic data stream comprising a seismic travel time and amplitude envelope and a raw log data stream comprising a log acoustic curve. Optionally, resampling and normalizing the raw survey data stream at 2 millisecond sampling intervals and 5 meter depth intervals to form the normalized initial data volume. Optionally, the specific steps of performing waveform similarity propagation of seismic attributes in the lateral direction are as follows: S301, traversing each transverse seismic section node in the bidirectional cascade topological s