Petroleum Science >2011,??Issue 2:??177-182 DOI: https://doi.org/10.1007/s12182-011-0132-2
An experimental study of shear strength of gas-hydrate-bearing core samples Open?Access
文章信息
作者：Zhang Weidong,Ma Qingtao,Wang Ruihe and Ren Shaoran
作者單位：
School of Petroleum Engineering, China University of Petroleum, Dongying, Shandong 257061, China;School of Petroleum Engineering, China University of Petroleum, Dongying, Shandong 257061, China;School of Petroleum Engineering, China University of Petroleum, Dongying, Shandong 257061, China;School of Petroleum Engineering, China University of Petroleum, Dongying, Shandong 257061, China
投稿時(shí)間：2010-10-09
引用方式：Zhang, W., Ma, Q., Wang, R. et al. Pet. Sci. (2011) 8: 177. https://doi.org/10.1007/s12182-011-0132-2
文章摘要
The shear strength of gas-hydrate-bearing reservoirs is one of the most important parameters used to study mechanical properties of gas-hydrate-bearing reservoirs. The shear strength of gas-hydratebearing reservoirs changes with fi lling and cementation of gas hydrates, which will affect the wellbore and reservoir stability. Traditional shear tests could not be conducted on gas-hydrate-bearing core samples because the gas hydrates exist under a limited range of temperature and pressure conditions. This paper describes a novel shear apparatus for studying shear strength of gas-hydrate-bearing core samples under original reservoir conditions. The preparation of gas-hydrate-bearing core samples and subsequent shear tests are done in the same cell. Cohesion and internal friction angle of the core samples with different saturations of gas hydrates were measured with the apparatus. The effect of gas hydrates on the shear strength of reservoirs was quantitatively analyzed. This provides a foundation for studying wellbore and reservoir stability of gas-hydrate-bearing reservoirs.
關(guān)鍵詞
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Natural gas hydrate, reservoir, experimental apparatus, shear test, internal cohesion, internal friction angle