摘要
本文论述了岩石在常规三轴应力作用下,如何实现动、静弹性参数的同时测量,通过对华北油田多种岩样在不同围压和轴压下的测试分析,发现岩石的动、静弹性参数的相互关系主要与所受的主应力差有关。在一定的主应力差下,通过多项式的最佳拟合检验,岩石动、静泊松比和动、静杨氏模量的相互关系都为线性关系,即μ_(?)=A_1+K_1μ_d和E_(?)=A_2+K_2E_d。为了便于工程应用,文章描述了截距A_1,A_2和斜率K_1,K_2与主应力差的相互关系,提出了岩石动、静弹性参数的相互关系在地层破裂压力预测中的应用。
This paper puts forward a method for simultaneously. measuring both dynamic and static parameters of rocks under triaxial stresses. An analysis of the measurement of rock.samples in the Huabei region shows that an interrelation of the dynamic and staticparameters is dependent on the main differential stresses, that is, the interrelation between the parameters is linear under the main differential stresses, shown as follows:μ_s=A_1+K_1μ_d and E_s=A_2+K_2E_dFor practical purpose, the interrelation of the intercepts A_1, A_2, and the slops of linesK_1, K_2 with the main differential stresses are described in this paper. An application of theinterrelation in prediction of formation fracture pressure is presented, also.
出处
《江汉石油学院学报》
CSCD
北大核心
1989年第2期62-69,共8页
Journal of Jianghan Petroleum Institute
关键词
岩石
弹性参数
相关性
formation fracture pressure prediction
Young's modulus
Poission's ratio
rock property
