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Segmented identification and evaluation method for fracture closure and openness

An evaluation method and sealing technology, applied in the field of oil and gas exploration, can solve the problems such as the difficulty of segmental identification of the sealing and opening of strike-slip faults, and the difficulty of fine characterization of faults by conventional technology, and achieve the effect of widespread promotion value.

Pending Publication Date: 2021-04-23
PETROCHINA CO LTD
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  • Application Information

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Problems solved by technology

[0003] Due to the complexity of strike-slip faults, conventional techniques are difficult to achieve fine characterization of faults, and it is difficult to realize the segmental identification of closed and open strike-slip faults

Method used

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  • Segmented identification and evaluation method for fracture closure and openness
  • Segmented identification and evaluation method for fracture closure and openness
  • Segmented identification and evaluation method for fracture closure and openness

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Embodiment Construction

[0054] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0055] The embodiment of the present invention provides an optimization scheme here, and adopts the optimal scheme to identify and evaluate the closure and opening of fractures in segments with a certain target area as the object, so as to provide a basis for the identification of the target area of ​​oil and gas enrichment in the next step. It mainly includes the following steps:

[0056] S100. Obtain the three-dimensional seismic amplitude data volume and drilling production data in the target area.

[0057] S200. Perform structure-guided filtering processing on the 3D seismic amplitude data volume, specifically inclu...

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Abstract

The invention discloses a segmented identification and evaluation method for fracture closure and openness. The method comprises the following steps: S100, acquiring a three-dimensional seismic amplitude data volume of a target area and drilling production data; S200, performing structure-oriented filtering processing on the three-dimensional seismic amplitude data volume; S300, on the basis of the three-dimensional seismic amplitude data volume, identifying a distribution rule of the fracture in a three-dimensional space through a machine learning technology; and S400, evaluating the sealing performance and the opening performance of the fracture through fracture space engraving, and evaluating the fracture segmentation characteristics in combination with drilling production materials. Fracture closure and openness segmented identification and evaluation are realized, a basis is provided for identification of a next oil-gas enrichment target area, and the method has wide popularization value.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a segmentation identification and evaluation method for fracture sealing and opening properties. Background technique [0002] Strike-slip faults have the characteristics of planar segmentation, and can generally be divided into three different fault styles: compression, pull-away, and translation. Different fault styles have obvious differences in sealing and opening, and have a great impact on the development of fault-karst reservoirs. And the distribution of oil and gas also have obvious control effect, it is necessary to identify and evaluate the fracture segment by technical means, so as to achieve the goal of effectively predicting the distribution of oil and gas. [0003] Due to the complexity of strike-slip faults, conventional techniques are difficult to achieve fine characterization of faults, and it is difficult to realize the segmental identification o...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30G06N3/08
CPCG01V1/282G01V1/301G01V1/306G06N3/08G01V2210/64
Inventor 朱光有陈玮岩陈志勇杨敏曹颖辉闫磊王珊李婷婷李洪辉
Owner PETROCHINA CO LTD
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