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Seismic information based method for determining coalbed methane enrichment sedimentation control effect

A technology for controlling action and seismic information, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve the problems of fast lateral phase change, difficult to meet accuracy, unclear lithological boundary, etc., and achieve the effect of reliable method path

Inactive Publication Date: 2018-10-19
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the serious phenomenon of thin interbedded coal-bearing rock series, rapid lateral facies change, and unclear lithological boundaries, there are large uncertainties in traditional prediction and interpretation methods, and its accuracy cannot meet the needs of actual production and development.

Method used

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  • Seismic information based method for determining coalbed methane enrichment sedimentation control effect
  • Seismic information based method for determining coalbed methane enrichment sedimentation control effect
  • Seismic information based method for determining coalbed methane enrichment sedimentation control effect

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Embodiment

[0061] Referring to the accompanying drawings, this embodiment takes the Shanxi Formation as the research target area, adopts the method of the present invention, and uses seismic information analysis to determine the control effect of coalbed methane enrichment and deposition. Include the following steps:

[0062] (1) Preprocess the logging data, use the core data for environmental correction, and combine the changes in the caliper curve to determine the possible collapsed section in the borehole, and make statistics on the logging curve values ​​of the uncollapsed well section with the same lithology , used to correct the log curves of the collapse section; the frequency histogram method is used to standardize the log curves, and the log curves of standard wells and their marker layers are selected as references to standardize the log curves of the remaining well sections.

[0063] (2) Comprehensively use seismic data, field outcrops, cores, mud logging and logging data, and...

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Abstract

The invention discloses a seismic information based method for determining coalbed methane enrichment sedimentation control effect. The method uses three-dimensional seismic data, applies seismic sedimentology interpretation techniques to coal-bearing stratum, predicts sedimentary microfacies of a target interval, and predicts a trend of gas content change in the target interval in the area by using relative relationship between sedimentary and lithological changes and gas content, thereby revealing the sedimentation control effect of coalbed methane. The method introduces seismic sedimentology into studies of the coal-bearing stratum, realizes fine characterization of sedimentary facies belts distribution and lithologic boundaries, analyzes and studies the coalbed methane enrichment sedimentation control effect, and provides strong technical support for the exploration and development of favorable areas for coalbed methane enrichment.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration and development of unconventional gas reservoirs, and relates to a method for judging the enrichment and sedimentation control of coalbed methane based on seismic information, in particular to a method for analyzing the sedimentary evolution of target intervals in the process of exploration and development and enrichment of coalbed methane It provides reliable basic data for the selection of favorable target enrichment areas for unconventional oil and gas exploration and development. Background technique [0002] Geological structural subsidence controls the material accumulation, distribution and sedimentary characteristics of the basin. Basin types and sedimentary characteristics control the distribution of sedimentary systems and sedimentary facies. Sedimentary facies belts can be used to indicate the development scale and physical properties of reservoirs. Basin-controlled and phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/28G01V1/302G01V1/307
Inventor 曹路通姚艳斌常锁亮潘永学刘永郑司建常艳海
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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