中文摘要：

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。

英文摘要：

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.