Method for identifying ultra-deep volcanic rock

An identification method and technology of volcanic rocks, which are applied in the exploration and development of natural gas and petroleum fields, can solve the problems of unclear lithofacies distribution characteristics of ultra-deep volcanic rocks, and achieve the effect of enhancing volcanic channel anomalies and reducing the ambiguity of geological meanings

Active Publication Date: 2021-02-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of unclear lithofacies distribution characteristics of ultra-deep volcanic rocks in the prior art, and provide a method for identifying ultra-deep volcanic rocks

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  • Method for identifying ultra-deep volcanic rock
  • Method for identifying ultra-deep volcanic rock
  • Method for identifying ultra-deep volcanic rock

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[0028] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0029] The volcanic rocks in the southwestern Sichuan erupted in large-scale fissures along the faults, and the energy was released quickly. The basalts of the overflow facies were the main ones, and the pyroclastic rocks of the eruptive facies were less. It is a small-scale central eruption along the fault, the energy release is slow, and there are many pyroclastic rocks in the eruptive facies. Combined with the aeromagnetic anomaly measurement data, there may be 11 basement fault systems developed in the Sichuan Basin and its surrounding areas. The Shifang-Longchang fault (basement...

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Abstract

The invention discloses a method for identifying an ultra-deep volcanic rock, and the method comprises the following steps: carrying out lateral mandatory filtering of a seismic data volume of a volcanic development zone, and highlighting the discontinuity of a longitudinal seismic data volume; with a principal component analysis data fusion method, enhancing abnormal characteristics of the volcano channel; carrying out chaotic attribute processing on the reflection clutter features to obtain a chaotic reflection value; performing lithofacies prediction on the chaotic reflection value throughclustering analysis; processing the chaotic reflection value by adopting a K-prototype algorithm to obtain a lithofacies classification result; and identifying a volcanic rock by integrating volcanicchannel abnormal characteristics and lithofacies classification results. The geological meaning multiplicity of the earthquake anomalous body is reduced, the ultra-deep volcanic rock identification method is provided, and the identification precision of the ultra-deep volcanic rock reservoir is greatly improved.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to an identification method for ultra-deep volcanic rocks. Background technique [0002] Volcanic rock reservoirs are an important target of oil and gas exploration, and seismic identification of volcanic rocks is the key to the exploration of volcanic rock reservoirs. Volcanic oil and gas reservoirs have been discovered in China. Xujiaweizi gas reservoir, Songnan gas reservoir, and Kelameili gas reservoir are all buried at a depth of 2000-4000m. In addition, the buried depth of volcanic rock reservoirs discovered abroad has not exceeded 4000m. Volcanic rock gas reservoirs, western Sichuan volcanic rocks have the characteristics of super deep burial, burial depth exceeding 6000m, and strong concealment. Affected by the ultra-deep burial, the quality of seismic data is low and identification is difficult; the lower part of the volcanic rocks in we...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/306G01V2210/624G01V2210/667
Inventor 段文燊闫亮董霞吴清杰赵迪马如辉谢洁宋沛东刘红爱杨国鹏
Owner CHINA PETROLEUM & CHEM CORP
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