Method and device for identifying gas-bearing reservoir

By combining well logging interpretation and AVO characteristics, a vertical identification standard was established. By utilizing pre-stack elastic parameter inversion and optimized seismic attributes, the problem of low accuracy in tight gas reservoir identification was solved, and efficient prediction of gas-bearing reservoir distribution and well placement optimization were achieved.

CN122151213APending Publication Date: 2026-06-05CNPC GREATWALL DRILLING COMPANY +1
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Patent Information

Application Number
CN202411782186.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies are insufficient for efficiently identifying the gas content of tight gas reservoirs, especially due to the low accuracy of two-dimensional seismic data acquisition, which leads to insufficient prediction accuracy and affects the success rate of well placement.

Method used

By combining well logging interpretation and reservoir AVO characteristics, a vertical identification standard is established. Favorable reservoir areas are determined by inverting pre-stack elastic parameters and selecting optimal seismic two-dimensional attributes, combined with the vertical identification standard.

Benefits of technology

It improved the accuracy of gas-bearing identification in tight gas reservoirs, clarified the spatial distribution pattern of reservoirs, and increased the success rate of well placement.

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Abstract

The invention discloses a method and device for identifying a gas-bearing reservoir, and the method comprises the steps: building a reservoir longitudinal identification standard according to the logging data and seismic data of a research region; a plurality of seismic attributes are extracted from each seismic survey line in the two-dimensional seismic data of the research area; determining an optimal seismic attribute from a plurality of seismic attributes through comparative analysis; and determining a favorable reservoir distribution area according to the reservoir longitudinal identification standard and the optimal seismic attribute.
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