Experimental investigation of Daqing Oilfield mudstones creep characteristic under different water contents
In order to analyze mechanism of easing damage, the uniaxial compression experiment and creep experiment of interbedded mudstone samples from Sanan development area of Daqing Oilfield under different water contents were carried out. The changes of the mudstones mechanical parameters and creep characteristics with the increment of water saturation were studied. The results indicate that the rock strength and elastic modulus decrease rapidly with the increment of water content, at the same time, the creep strain and creep strain rate of steady state increase with the increment of water content, and also the steady state creep strain rate is enhanced with the increment of deviatoric stress. Through the ereep characteristic curves, a non-linear creep constitutive equation of mudstone considering the change of water contents is established, which will be used in future numerical analysis.
mudstone interlayer casing damage creep experiment water content non-linear creep equation
HUANG Xiao-lan(黄小兰) LIU Jian-jun(刘建军) YANG Chun-he(杨春和) CHEN Jian-wen(陈剑文)
Institute of Porous Media Mechanics, Wuhan Polytechnic University, Wuhan 430023, China; Wuhan Instit Institute of Porous Media Mechanics, Wuhan Polytechnic University, Wuhan 430023, China Wuhan Institute of Rock and Soil Mechanics, the Chinese Academy of Sciences, Wuhan 430071, China
国际会议
长沙
英文
471-474
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）