Phase control karst type fracture-cavity assembly depicting method and device

A kind of aggregate and karst technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as characterization
CN112379435APending Publication Date: 2021-02-19BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2021-02-19

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Abstract

The invention provides a phased karst type fracture-cavity assembly depicting method and device, and the method comprises the steps: carrying out the plane prediction of a sedimentary facies type according to logging data of a target reservoir, and obtaining a sedimentary facies plane graph of the target reservoir; decomposing the pre-stack migration seismic data of the target reservoir by using wavelet transform to obtain a plurality of frequency division bodies; taking the sedimentary facies planar graph of the target reservoir as a constraint, and selecting a low-frequency end data volume from the plurality of frequency division bodies; reconstructing pre-stack migration seismic data according to the low-frequency end data volume to obtain a reconstructed seismic data volume; extractingan amplitude difference attribute body and a texture variance attribute body from the reconstructed seismic data volume; and fusing the amplitude difference attribute body and the texture variance attribute body by using a two-dimensional color table to obtain a three-dimensional depiction of the phased karst type fracture-cavity assembly. Through seismic means such as phase control, frequency division, reconstruction, fusion and the like, fine depiction of a small-scale phase control karst type hole assembly is gradually and indirectly realized.
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Description

technical field

[0001] The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a method and device for depicting facies-controlled karst fracture-cave aggregates. Background technique

[0002] In recent years, with the continuous progress and improvement of computer technology and geophysical technology, major breakthroughs have been made in the exploration and development of carbonate rocks, and it has become one of the most important fields for increasing oil and gas reserves and production. Compared with clastic rock oil, carbonate rock usually has the characteristics of ancient formation age, deep burial, low matrix porosity, and many karst reformation periods. The existence of these characteristics brings great challenges to the seismic description of carbonate reservoirs, especially the description of karst-vuggy reservoirs with strong heterogeneity.

[0003] At present, the research on carbonate karst po...

Claims

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