New Evaluation Method of Permeability Stress Sensitivity Based on Visual Fracture Aperture Measurement

详细信息   

• 责任者：Li Daqi (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Southwest Petroleum University ; Chengdu 610500 ; China) ; Kang Yili
• 刊名：Natural Gas Geoscience
• 出版年：2011
• 卷期：22(3)
• 关键词：储层评价 ; reservoir evaluation ; 裂隙 ; cracks
• 页码：p.494-500
• 图表：6 illus., 4 tables, 32 refs.
• 分类号：1003
• issnNo：ISSN1672-1926
• isbnNo：CN62-1177/TE

摘要

Reservoir stress sensitivity evaluation is an important tool in reservoirs protection, production forecast, and development program decision. Because the fracture surface is not smooth, the fracture width is not a constant value along the fracture, and it can change with the wellbore pressure. It is still debatable which width value property of facture variation has been argued. To solve this problem, the microscopic image analysis device for loading rocks has been used. The distribution and variation of facture width and permeability has been investigated at different confining pressures. In combination with conventional experimental evaluation of reservoir stress sensitivity, the authors discuss the eigenvalues of fracture aperture. The results show that aperture distribution would keep a normal distribution when the confining pressure increase between 0 MPa and 20 MPa, and the process of fracture compaction shows a property of self-similarity.