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Reservoir permeability model building method based on stress sensitivity analysis

A stress-sensitivity, model-building technology, applied in special data processing applications, instruments, design optimization/simulation, etc., can solve problems such as less consideration of formation stress effects, and achieve good correlation

Active Publication Date: 2018-07-13
中石化石油工程技术服务有限公司 +2
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Problems solved by technology

However, less consideration is given to the influence of formation stress on it

Method used

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  • Reservoir permeability model building method based on stress sensitivity analysis
  • Reservoir permeability model building method based on stress sensitivity analysis
  • Reservoir permeability model building method based on stress sensitivity analysis

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[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0034] The lithology of F marine carbonate formation in Y Oilfield in the Middle East is marl, marl, granular limestone, and dolomitic limestone. The reservoir matrix has well-developed pores and few fractures. The 802 rock samples have an average porosity of 10.13% and an average permeability of 1.49MD, belonging to the pore-type medium-low porosity and medium-low permeability reservoirs. In order to accurately obtain reservoir physical parameters, it is necessary to conduct stress sensitivity analysis on the porosity and permeability of conventional physical property analysis, and then establish an interpretation model. Unlike porosity stress correction, which only presents one sensitivity, the core permeability involved in the analysis ...

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Abstract

The invention discloses a reservoir permeability model building method based on stress sensitivity analysis. The porosity and the permeability are analyzed by means of core stress experimental data; on the basis of the intersection relationship between the core porosity and the core permeability, a permeability calculation model is built. The permeability and the core analysis permeability are calculated through logging, and the permeability and the core analysis are well related.

Description

technical field [0001] The invention relates to a method for establishing a reservoir permeability model based on stress sensitivity analysis. Background technique [0002] The storage space of carbonate reservoirs is dominated by secondary pores formed during the diagenetic stage, epigenetic or supergenetic transformation process after deposition. The pore structure of carbonate reservoirs becomes complex due to the wide variety of secondary reformation effects. The permeability parameters that characterize the seepage characteristics of reservoirs are affected by factors such as fracture development, dissolution degree, mineral composition and reservoir stress sensitivity, making accurate calculation a bottleneck in the evaluation of carbonate reservoirs. Previous attempts to use different pore and particle characteristics to study the relationship between permeability; use the microscopic properties of rocks (specific surface area, throat size, particle size and tortuosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 缪祥禧吴见萌葛祥张正玉
Owner 中石化石油工程技术服务有限公司
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