Lithologic Reservoirs ›› 2008, Vol. 20 ›› Issue (1): 111-113.doi: 10.3969/j.issn.1673-8926.2008.01.019

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Two types of stress sensitivity mechanisms for reservoir rocks:Being favorable for oil recovery

LI Chuanliang1, TU Xingwan2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China; 2. Northwest Oilfield Company, Sinopec, Luntai 841604, China
  • Online:2008-03-15 Published:2008-03-15

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Abstract:

There exist two typical deformations for reservoir rocks: primary deformation and structural one. Accordingly, there are two types of stress sensitivity for reservoir rocks. Based on the research, the stress sensitivity of reservoir rocks caused by primary deformation is quite weak, and it can be neglected in the production practice of reservoir development. However, the stress sensitivity of reservoir rocks caused by structural deformation is quite strong, which can not only reduce the production rate of reservoir, but also maintain the reservoir pressure properly and increase the production rate of oil. The stress sensitivity of reservoir rocks is quite favorable for oil recovery.

Key words: sequence, sequence hierarchy, cyclicity, stage, lithologic stratigraphic reservoir

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