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Method and system for judging strike-slip fracture boundaries and main sections

A technology of fault main and cross-section, which is applied in the field of strike-slip fault boundary and main section discrimination based on 3D seismic data in carbonate rocks in desert areas, which can solve the difficulties of small fault throw, deep burial, main section and fault zone boundary identification, etc. problems, to achieve the effect of improving the success rate of drilling and improving economic benefits

Inactive Publication Date: 2020-10-20
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, due to the characteristics of high-angle strike-slip faults, deep burial, and small fault throw, it is difficult to identify the main section and the boundary of the fault zone.

Method used

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  • Method and system for judging strike-slip fracture boundaries and main sections
  • Method and system for judging strike-slip fracture boundaries and main sections
  • Method and system for judging strike-slip fracture boundaries and main sections

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Embodiment Construction

[0026] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0027] Additionally, the steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0028] The formation and scale of strike-slip faults in t...

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Abstract

The invention discloses a method and a system for distinguishing strike-slip fracture boundaries and main sections. The method comprises the following steps of: 1, preprocessing three-dimensional seismic data of a region to be distinguished; 2, tracking a marker layer of a strike-slip fault zone development area on a seismic section formed based on the preprocessed three-dimensional seismic data;3, calculating gradient structure tensor, coherence and amplitude change rate attributes at a marker bed; and step 4, comprehensively calculating the gradient structure tensor, coherence and amplitudechange rate attributes at the marker bed to determine the boundary of a strike-slip fault zone and a strike-slip fault main section. According to the method, the development scale of a fault solutionreservoir in a strike-slip fault zone can be evaluated, the most favorable drilling position and the horizontal well track are guided and optimized, and technical support is provided for explorationand development well position deployment in the deep carbonate rock field.

Description

technical field [0001] The invention relates to the technical field of seismic geological interpretation for oil and natural gas exploration in complex exploration areas, in particular to a method and system for distinguishing strike-slip fault boundaries and main sections of carbonate rocks in desert areas based on three-dimensional seismic data. Background technique [0002] In the practice of oil and gas exploration and development in the Tarim Basin, fault zones have always been the key areas of related research. Previous studies have concluded that strike-slip fault zones have the following main effects on petroleum geology: (1) control the structural pattern and sedimentary system of the basin; (2) provide effective pathways for oil and gas migration; (3) improve the physical properties of reservoirs. With the discovery of the Shunbei Oilfield in the Tarim Basin, major breakthroughs have been made in deep carbonate drilling along the strike-slip fault zone, and more un...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/302G01V1/306
Inventor 李宗杰刘军云露黄超杨子川杨林王保才曹自成柳建华任丽丹李弘艳王鹏张永升闫娥张荣
Owner CHINA PETROLEUM & CHEM CORP
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