渤海地区岩样的试验研究以及新型岩石损伤本构模型的建立  

EXPERIMENTAL STUDY ON CONSTITUTIVE RELATION OF ROCK SPECIMENS IN BOHAI AREA AND ESTABLISHMENT OF A NEW CONSTITUTIVE MODEL OF ROCK DAMAGE

作　　者：田家林[1,2] 付传红 梅鑫 杨琳[1] 李友[1] 朱永豪[1] 

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南交通大学机械工程学院,成都610031 [3]西南油气田分公司川东北气矿,达州635000

出　　处：《工程地质学报》2016年第2期284-291,共8页Journal of Engineering Geology

基　　金：石油天然气装备教育部重点实验室(西南石油大学)项目(OGE10);国家自然科学基金(51074202;11102173);四川省教育厅成果转化重大培育项目(12ZZ003);西南石油大学研究生创新资金(CX2014SY26)资助

摘　　要：针对渤海地区油气资源的开采困难以及现有岩石损伤本构模型的理论体系的不足等问题,该文对渤海岩石取样进行试验研究,根据试验所得参数建立了一种新型的岩石损伤本构模型。首先,利用岩石三轴测试仪对所取岩样进行变温度、变围压测试,获得岩样的全应力-应变曲线,并计算出岩样的泊松比、弹性模量以及最大应力差。其次,利用图解法作莫尔应力圆,确定岩样的黏结力和内摩擦角。最后,根据试验部分数据建立一种新型岩石损伤本构模型。该模型参数少,计算简便,将所建模型的计算结果与试验所得全应力-应变曲线进行验证,验证了所建岩石损伤本构模型的准确性。研究结论可为岩石损伤模型的完善以及现场石油资源的高效开采提供试验和理论支撑。Bohai rock samples have been studied in order to speed up oil and gas resource exploitation in Bohai and improve the existing theory system of rock damage constitutive models.According to the test result parameters, a new damage constitutive model of rock is established.Firstly,with the test of variable temperature and confining pressure of rock specimens in the tri-axis test instrument,the whole stress-strain curves of rock samples are obtained.The Poisson＇s ratio,elastic modulus and maximum differential stress of the rock are calculated.Secondly, using the graphic method for Mohr stress circle,the cohesive force and internal friction angle of rock samples arenbsp;determined.Lastly,according to parts of the test data,a new damage constitutive model of rock has been built.The model refers fewer parameters and simple calculation.The calculation results of the model and the whole stress-strain curves of test have verified the accuracy of this rock damage constitutive model.The conclusions of the study can provide experimental and theoretical support to improve the rock damage model and the efficient exploitation of petroleum resources on site.

关 键 词：岩石 温度 围压 试验研究 本构模型 

分 类 号：TE121[石油与天然气工程—油气勘探]