It is of great significance to study the mechanical properties of hydrate-bearing sediments for safe and efficient exploitation of hydrate resources. Considering the lack of studies on clay-bearing fine-grained reservoirs, submarine clay taken from the Shenhu Sea in the South China Sea and quartz sand were used to synthesize hydrate-bearing clayey-silty sediments (HBCS). A series of consolidated-drained tests were carried out to investigate the effects of hydrate saturation, effective confining pressure, and their coupling on the mechanical properties of HBCS. The results show that with the increase in hydrate saturation and the decrease in effective confining pressure, the stress-strain curve of the HBCS shows a trend from strain hardening to strain softening. The peak strength and residual strength increase with the increase in effective confining pressure and hydrate saturation. The secant modulus E50 increases with the increase in hydrate saturation and shows an irregular change trend with the increase in effective confining pressure. The contact area between particles determines the change rule of Secant modulus E50. With the increase in hydrate saturation, the cohesion first increased rapidly and then increased slowly. The internal friction angle increases with the increase in hydrate saturation, but the increase is small. This indicates that hydrate has a great influence on the cohesion of sediments, but a small influence on the internal friction angle.
机构:
State Key Laboratory of Heavy Oil Processing, China University of Petroleum-BeijingState Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Xingxun Li
Rucheng Wei
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State Key Laboratory of Heavy Oil Processing, China University of Petroleum-BeijingState Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Rucheng Wei
Qingping Li
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机构:
State Key Laboratory of Natural Gas Hydrate, CNOOC Research Institute Co,State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Qingping Li
Weixin Pang
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State Key Laboratory of Natural Gas Hydrate, CNOOC Research Institute Co,State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Weixin Pang
Qi Fan
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State Key Laboratory of Natural Gas Hydrate, CNOOC Research Institute Co,State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Qi Fan
Guangjin Chen
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State Key Laboratory of Heavy Oil Processing, China University of Petroleum-BeijingState Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
Guangjin Chen
Changyu Sun
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State Key Laboratory of Heavy Oil Processing, China University of Petroleum-BeijingState Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing
机构:
China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Li, Xingxun
Wei, Rucheng
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China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Wei, Rucheng
Li, Qingping
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CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing 100027, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Li, Qingping
Pang, Weixin
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CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing 100027, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Pang, Weixin
Fan, Qi
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CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing 100027, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Fan, Qi
Chen, Guangjin
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China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Chen, Guangjin
Sun, Changyu
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China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Zhang, Chenyi
Luo, Tingting
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Yanshan Univ, Sch Vehicle & Energy, Qinhuangdao 066004, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Luo, Tingting
Wu, Zhaoran
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Yanshan Univ, Sch Vehicle & Energy, Qinhuangdao 066004, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Wu, Zhaoran
Sun, Peixin
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Sun, Peixin
Chen, Yulu
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Chen, Yulu
Ding, Ying
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Ding, Ying
Xue, Yong
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Xue, Yong
Zhao, Yi
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Zhao, Yi
Yang, Weihao
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China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Yang, Weihao
Madhusudhan, B. N.
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Univ Southampton, Fac Engn & Environm, Southampton SO17 1BJ, EnglandChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Madhusudhan, B. N.
Song, Yongchen
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Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R ChinaChina Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China