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Quantitative prediction method for stratification seam of compact oil reservoir layer

A prediction method and technology of bedding fractures, applied in geophysical measurement, measuring devices, seismic signal processing, etc., can solve the problems of tight oil reservoir bedding fractures that have not been studied in depth, and achieve the effect of improving the development effect

Active Publication Date: 2018-04-20
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] However, there is no in-depth research on the bedding fractures of tight oil reservoirs at this stage, and the few existing reports are mostly based on the macroscopic description of cores, which belong to the stage of qualitative analysis

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  • Quantitative prediction method for stratification seam of compact oil reservoir layer

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Embodiment 1

[0051] Example 1: Such as figure 1 As shown, this embodiment provides a method for quantitative prediction of bedding fractures in tight oil reservoirs. The present invention can determine the critical strength of bedding fractures under different tectonic stress and fluid pressure strength conditions, and quantitatively predict the bedding of tight oil reservoirs. The degree of development and distribution of fractures provide a new idea and approach for the study of tight oil reservoir bedding fractures, and improve the effectiveness of tight oil exploration and development.

[0052] In order to achieve the above objectives, the present invention adopts the following technical means:

[0053] The present invention provides a method for quantitative prediction of tight oil reservoir bedding fractures, which includes the following steps:

[0054] (1) Determine the paleo-tectonic stress state in the study area, including its direction and magnitude;

[0055] (2) Determine the dominant...

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Abstract

The invention discloses a quantitative prediction method for a stratification seam of a compact oil reservoir layer. Paleostructure stress states and compact reservoir layer paleo-fluid pressures of aresearch area in different periods are determined; simulation experiment is carried out to construct a relationship between a fluid pressure and a triaxial tectonic stress and critical strengths formed by stratification seams in different tectonic stress states and on different fluid pressure strength conditions are determined; and a quantitative prediction index (I) of a stratification seam of acompact oil reservoir layer is constructed and a growth degree and a distribution rule of the stratification seam of the compact oil reservoir layer are predicted in a quantitative manner. Therefore,a novel idea and path is provided for the stratification seam study of the compact oil reservoir layer; and the exploration and development effects of the compact oil are improved.

Description

Technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a method for quantitative prediction of tight oil reservoir stratum fractures. Background technique [0002] At present, the global conventional oil and gas resources continue to decrease, and with the deepening of oil and gas exploration and development, the exploration and development of unconventional oil and gas represented by tight oil, tight gas, shale gas, and coalbed methane has received increasing attention. Among them, tight oil is currently the most realistic unconventional oil and gas resource, and has become a bright spot in global oil exploration and development. The Upper Triassic Yanchang Formation in the Ordos Basin of China is rich in tight oil resources. Relevant data show that fractures can significantly improve the permeability of tight oil reservoirs. Therefore, research on reservoir fractures is significant for the current exploration and dev...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 鞠玮孙维凤秦勇吴财芳申建沈玉林
Owner CHINA UNIV OF MINING & TECH
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