原位条件下致密储层岩体力学动静态参数校正

为更加准确测量储层岩体力学动、静态参数，归纳两者关系并探讨差异的影响因素，对岩体地下所处条件（即综合考虑围压、孔隙压力、温度和饱和流体的影响）进行了恢复，同步测量了49块不同地区储层岩样的动、静态参数。结果表明：①在原位条件下动、静态杨氏模量相关性好；②对于低渗透储层，动态杨氏模量普遍大于静态，而且随着岩样致密程度的增大差异变大；③针对不同样品，根据物性细分，各自建立动、静态参数图版，大大地提高了相关性和准确性。最后根据中国陆相松辽、鄂尔多斯两个大型盆地低渗透储层样品物性的差异，建立了原位条件下杨氏模量动、静态校正图版，为进一步建立低渗透油气藏岩体力学参数场和地应力场，优化压裂参数设计和提高施工成功率提供较可靠的资料。

Static and dynamic mechanical parameter calibration of tight reservoir rock mass under in-situ condition

In order to accurately measure static and dynamic mechanical parameters of reservoir rock mass,establish their relation and discuss the factors that result in their differences,dynamic and static mechanical parameters of 49 reservoir rock samples were synchronously measured under simulated in-situ reservoir conditions,with the influences of confining pressure,pore pressure,temperature and saturated fluids being considered.The results show that static and dynamic Young's modulus correlate well under in-situ conditions.For low permeability reservoir,dynamic Young's modulus is generally greater than the static,and their difference will get greater with the increasing of dense degree.For different samples,building dynamic and static Young's modulus plates based on subdivision of physical properties can greatly improve the relevance and accuracy.Finally,the dynamic and static Young's modulus calibration plates under in-situ conditions are built according to the differences of physical properties between samples from the low permeability reservoir rocks in Songliao and Ordos basins.The plates not only can be used to establish mechanical parameter field and stress field of low permeability reservoir rock mass,but also provides more reliable data for optimizing the design of fracturing parameters and improve the success rate of operation.