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Pre-stack quantitative prediction method and device for total organic carbon content of shale gas reservoir, and equipment

A technology for total organic carbon content and prediction method, which is applied in measurement devices, geophysical measurements, seismology for logging records, etc., and can solve problems such as low accuracy and failure to consider reservoir development characteristics.

Active Publication Date: 2020-10-23
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

[0004] However, in the process of realizing the application, the inventors of the application found that: in the above-mentioned conventional scheme, the shear wave velocity prediction usually uses conventional petrophysical modeling or neural network fitting, etc., without considering the development characteristics of the reservoir. As a result, the accuracy of the final pre-stack prediction results of TOC content in shale gas reservoirs is not high

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  • Pre-stack quantitative prediction method and device for total organic carbon content of shale gas reservoir, and equipment
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  • Pre-stack quantitative prediction method and device for total organic carbon content of shale gas reservoir, and equipment

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[0071] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described The embodiments are only some of the embodiments in this specification, not all of the embodiments. Based on the implementations in this specification, all other implementations obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0072] refer to figure 1 As shown, the method for pre-stack quantitative prediction of total organic carbon content in shale gas reservoirs in the embodiments of this specification may include the following steps:

[0073] S101. Obtain post-stack seismic data of shale gas reservoirs, and perform well-seismic calibration on the post-stack sei...

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Abstract

The embodiment of the invention provides a pre-stack quantitative prediction method and device for the total organic carbon content of a shale gas reservoir, and equipment. The method comprises the steps: acquiring preprocessed pre-stack angle gather data of the shale gas reservoir; according to the preprocessed pre-stack angle gather data, the calibrated time-depth relationship and obtained seismic horizon interpretation data, generating low-frequency models of near-angle, middle-angle and far-angle elastic wave impedance of the shale gas reservoir; inverting the low-frequency models to obtain an inversion result; determining the longitudinal and transverse wave velocity ratio of the shale gas reservoir according to the inversion result; and inputting the longitudinal and transverse wavespeed ratio into a preset relation curve of the longitudinal and transverse wave speed ratio and the TOC content to obtain the TOC content of the shale gas reservoir. According to the embodiment of the invention, the accuracy of TOC content prediction can be improved.

Description

technical field [0001] This specification relates to the technical field of oil and gas exploration and development, in particular to a method, device and equipment for pre-stack quantitative prediction of Total Organic Carbon (TOC) content in shale gas reservoirs. Background technique [0002] Shale gas reservoirs are important unconventional oil and gas reservoirs. Quantitative prediction of "sweet spots" in shale gas reservoirs is the primary content of shale gas exploration and development. Clarify the logging and seismic response characteristics of shale gas reservoirs by means of logging data interpretation, fine well-seismic calibration, and eye-opening simulation, and predict various key factors such as the thickness, TOC content, and fracture development characteristics of shale gas reservoirs , to determine favorable reservoir development characteristics. [0003] The TOC content of shale gas reservoirs is an important index to evaluate the organic matter charact...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/624
Inventor 杜炳毅张广智张静郭晓龙郭伟李林周游蔺营
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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