激波作用下岩石损伤试验及评价方法  

Rock damage experiment and evaluation method by exploding wave

作　　者：蒋金宝[1] 林英松[1] 张宝康[1] 刘兆年[1] 丁雁生[2] 

机构地区：[1]中国石油大学石油工程学院 [2]中科院力学所,北京100081

出　　处：《中国石油大学学报（自然科学版）》2008年第3期75-79,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”计划项目(2007AA06Z208);中国石油化工股份有限公司资助项目(P03051);中国石油大学研究生创新基金项目(S2005-53)

摘　　要：通过水中爆炸激波对试样的损伤试验来模拟激波对地层岩石的破坏作用。试验中观测了爆炸后试样内部裂纹形貌的分布,利用自制传感器测到了试样内部的激波压力,优化筛选出了损伤度模型。通过对试样弹性波速进行处理和分析,给出了试样的动态损伤阈值求解方法。结果表明,激波在试样中的传播符合指数衰减规律,相对损伤度、无量纲波速的平方、无量纲拉应力它们两两之间呈线性关系。The sample damage experiment by exploding wave in water, which is used to simulate the rock damage by explo- ding wave in reservoir, was carried out. The fractures distribution rule in sample was observed. The exploding wave pressure was measured by self-made sensor, and the selected damage model was optimized. By treating and analyzing the elastic wave velocity data, the solution method for dynamic damage threshold was obtained. The results show that the rule of exploding wave propagation in sample accords with exponential damping, and a linear relationship exists among relative damage, the square of dimensionless elastic wave velocity and dimensionless tensile stress.

关 键 词：激波 岩石损伤 试验研究 相对损伤度 无量纲波速 无量纲拉应力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]