开展地应力岩石Kaiser效应测试技术改造低渗透储层

Rock stress testing technology in remodeling low permeability layers

地应力状态不仅影响和控制着压裂形成的支撑裂缝 ,而且与施工的排量和压力等有密切关系。文中从地应力与压裂施工设计的关系和地应力测量研究方法入手 ,分析用单轴压机和三轴压机对岩石Kaiser效应的试验方法 ,评价为 :三轴压机装置既能研究岩石的声发射特征 ,又能对其应力———应变关系进行研究。对引进的MTS多功能岩石力学仪的结构和技术难点进行分析。提出开展地应力测试技术研究能对四川低渗透油气藏改造有积极的作用。

Earth stress not only has the effects to the propped fracture,but also being closely related with the operating flowrate,pressure and etc..On the basis of the relation of earth stress and fracturing working design,and the research method of earth stress measuring,the paper analyses the test method of rock Kaiser effect by using uniaxial and triaxial testing equipment.The testing result shows that triaxial testing equipment can study both the acoustic reflection feature of rock and stress-strain relation of rock.The structure and technical difficulty of introduced MTS multifunction rock mechanics instrument are presented.