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Method of analyzing and peeling high shielding layer based on coal-seam earthquake response characteristic

A technology for seismic response and feature analysis, applied in seismic signal processing and other directions, to solve problems such as low lateral continuity processing efficiency

Inactive Publication Date: 2018-01-30
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] Aiming at the problems of lateral continuity and low processing efficiency in the process of strong shielding stripping, the present invention proposes a method for correcting the stripping of coal seam strong shielding layer, which is used to eliminate the reflection effect of the strong shielding layer on the underlying formation

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  • Method of analyzing and peeling high shielding layer based on coal-seam earthquake response characteristic
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  • Method of analyzing and peeling high shielding layer based on coal-seam earthquake response characteristic

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Embodiment Construction

[0040] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0041]The invention proposes a seismic data suppression or stripping correction processing method for the impact of strong shielding layers such as coal seams on the reflection of underlying strata. Based on the comprehensive analysis and interpretation of the seismic response characteristics of coal-measure strata, the strata-controlled multi-channel dynamic matching tracking method is used to correct the strong shielding layer stripping, a...

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Abstract

The invention provides a method of analyzing and peeling a high shielding layer based on a coal-seam earthquake response characteristic. The method comprises the following steps of carrying out spectrum analysis on earthquake data and determining an earthquake signal main frequency and a frequency band range; carrying out layer position time tracking on the high shielding layer; calculating an earthquake data instantaneous attribute value and taking the value as an initial scale factor of matching tracking; calculating a wavelet amplitude <f, g gamma 0> and carrying out wavelet matching analysis; and using a multi-channel dynamic matching tracking method to carry out high shielding layer peeling. After the high shielding layer is peeled by using the method, an insidious effective weak signal can be protruded so that effective data is provided for subsequent earthquake reservoir prediction.

Description

technical field [0001] The invention relates to the fields of geology and oil and gas seismic exploration and development, in particular to a method for analyzing and stripping a strong shielding layer based on the seismic response characteristics of coal seams. Background technique [0002] Coal-measure strata are generally developed in the central and western parts of my country and many other sedimentary basins in the world. The existence of coal-measure strata will form a strong shielding effect on the underlying strata, causing the seismic reflection waves of the strata near the coal seam to be submerged in the strong reflection of the coal seam. However, it is difficult to identify and explain, which will seriously affect the seismic sedimentological interpretation of the formation near the coal seam and the reservoir prediction of oil and gas exploration and development. Therefore, it is necessary to take technical measures to suppress or strip the strong shielding inte...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 张宏张军华张在金张金强刘俊州
Owner CHINA PETROLEUM & CHEM CORP
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