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Composite igneous rock classification fine identification method, identification device and electronic equipment

A fine identification and igneous rock technology, applied in measuring devices, seismology, instruments, etc., can solve problems such as difficulty in determining igneous rock lithology and lithofacies, insufficient depiction of fineness, impact on seismic imaging accuracy of underlying strata, etc., to achieve the goal of improving accuracy Effect

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seismic methods can discover igneous rocks, determine the depth of igneous rocks with high precision, and even delineate the range of igneous rocks, but it is difficult to determine the lithology and lithofacies of igneous rocks
[0005] In the actual strata, igneous rocks erupt in stages, so most of them are a variety of lithological combinations, and the vertical and horizontal changes are very complex. Due to the abnormal velocity of igneous rocks, it usually has a great impact on the seismic imaging accuracy of the underlying strata.
Most of the studies that have been carried out so far are to analyze various complex igneous rock assemblies as a whole. Although some results have been achieved, the level of detail is obviously insufficient.
The conventional igneous rock identification process has limited basis and cannot carry out vertical and horizontal fine description, so it is necessary to carry out research and application of new methods

Method used

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  • Composite igneous rock classification fine identification method, identification device and electronic equipment
  • Composite igneous rock classification fine identification method, identification device and electronic equipment
  • Composite igneous rock classification fine identification method, identification device and electronic equipment

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Experimental program
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Embodiment 1

[0054] Such as figure 2 Shown, the specific implementation steps of the present invention are as follows:

[0055] Carry out forward modeling on igneous rocks and underlying formations, and analyze the impact of different lithology igneous rocks on underlying formations. Specifically, the forward modeling model of the influence of different variable igneous rocks on the underlying strata is designed, and the forward modeling records are obtained through forward modeling, so that the relationship between the parameters of the igneous rocks and the imaging anomalies of the underlying strata, combined with the imaging results of the actual target layer, Reverse push up igneous rocks.

[0056] At the same time, according to the actual logging data, multi-parameter intersection analysis is carried out to obtain the sensitive parameter intervals of various igneous rocks, so as to establish the corresponding relationship between various igneous rocks and seismic response characteri...

Embodiment 2

[0059] In a certain exploration area in the west, the Permian covers a large number of igneous rocks, and the igneous rocks erupt and deposit in multiple batches, and the lithology changes very quickly in the horizontal and vertical directions. Fine imaging of the reservoir creates a lot of noise.

[0060] Figure 3a It is a model diagram of igneous rocks in different distribution ranges according to an embodiment of the present invention, Figure 3b It is a model diagram of igneous rocks with different thicknesses according to an embodiment of the present invention, Figure 3c It is a model diagram of igneous rocks with different speeds according to an embodiment of the present invention.

[0061] The model of the relationship between the parameter changes of igneous rocks and the underlying strata was produced to illustrate the relationship between each parameter and the travel time difference of the imaging results of the underlying strata when the igneous rocks have not ...

Embodiment 3

[0071] This embodiment provides a composite igneous rock classification fine identification device, including:

[0072] The forward modeling unit performs forward modeling on igneous rocks and underlying formations, and analyzes the influence of different lithology igneous rocks on underlying formations;

[0073] The analysis unit, based on the actual logging data, conducts multi-parameter intersection analysis to establish the relationship between igneous rock lithology and logging parameters;

[0074] The identification unit uses the above-mentioned analysis data to realize the fine description of different types of igneous rocks in plane and space.

[0075] The forward modeling unit and the analysis unit are respectively connected to the identification unit by communication, and are used to send the results of the forward modeling and the intersection analysis to the identification unit respectively. The identification unit uses the above-mentioned analysis data to realize...

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Abstract

The invention provides a composite igneous rock classification fine identification method, an identification device and electronic equipment. The composite igneous rock classification fine identification method comprises the following steps: performing forward modeling simulation on igneous rocks and underlying strata, and analyzing the influence of the igneous rocks with different lithologies on the underlying strata; multi-parameter intersection analysis is conducted on actual logging data, and the relation between igneous rock lithology and logging parameters is established; by means of the analysis data, fine description of different types of igneous rocks in the plane and the space is achieved. According to the method, a technical process for fine description of different lithology in the composite igneous rock is established for the first time, and the method is utilized to carry out igneous rock classification fine description of actual data. According to the method, fine description of different lithological characters of the composite igneous rock is realized, the igneous rock description precision is improved, a good foundation is laid for subsequent speed modeling and imaging work, and the exploration risk is reduced.

Description

technical field [0001] The invention belongs to the field of seismic data interpretation, and in particular relates to a technical process for classification and identification of composite igneous rocks. Background technique [0002] The lithology prediction of seismic data is one of the contents of reservoir prediction. A seismic sequence contains different sedimentary facies belts, and due to different depositional environments, there will be great differences in lithological parameters, including rock composition, particle size and shape, cementation degree, porosity, Fluid composition and saturation in pores, temperature, pressure, deposition thickness, etc. Changes in lithology cause changes in elastic parameters, including elastic modulus, density, velocity, Poisson's ratio, absorption properties, etc. Changes in elastic parameters will cause changes in reflection characteristics on the seismic section, including amplitude, waveform, frequency component, wave interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 胡玮朱博华杨江峰裴思嘉李芦茜
Owner CHINA PETROLEUM & CHEM CORP