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Petroleum Science >2011,??Issue 2:??194-199 DOI: https://doi.org/10.1007/s12182-011-0134-0

The effective pressure law for permeability of clay-rich sandstones Open?Access

文章信息

作者：Zhao Jinzhou,Xiao Wenlian,Li Min,Xiang Zuping,Li Lijun and Wang Jun

作者單位：

State Key of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;Exploration & Development Research Institute, Sinopec Southwest Branch, Chengdu, Sichuan 610081, China;State Key of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

投稿時間：2010-10-17

引用方式：Zhao, J., Xiao, W., Li, M. et al. Pet. Sci. (2011) 8: 194. https://doi.org/10.1007/s12182-011-0134-0

文章摘要

To study the relative sensitivity of permeability to pore pressure P_p and confining pressure P_c for clay-rich rocks, permeability measurements were performed on samples of four clay-rich sandstones. A new method (hereafter denoted the “slide method”) was developed and used for analyzing the permeability data obtained. The effective pressure coefficients for permeability n_k were calculated. The values of n_k were found to be greater than 1.0 and insensitive to changes in pressure. These results confirmed observations previously made on clay-rich rocks. Also, the coefficients n_k obtained had different characteristics for different samples because of differences in the types of clay they contained. The effective pressure law (σ_eff=P_c–n_kP_p) determined using the slide method gave better results about k(σ_eff) than classic Terzaghi’s law (σ_eff=P_c–P_p).

關(guān)鍵詞

Permeability, effective pressure c oeffi cient, slide method, clay, sandstones