【摘要】 非常规资源如页岩气和致密砂岩气的开发,要求综合利用多学科的知识,以解决诸多工程问题来获得经济产能。不同类型数据如三维地震和微地震数据所揭示出的储层非均质性能,更深入全面地揭示储层特性并优化钻井和完井程序。本文研究中,首先利用三维地震曲率属性预测了储层局部应力方向及天然裂缝闭合状态,获得了储层非均质性信息及地质力学性质;利用蚂蚁体预测了储层裂缝网络以及利用曲率和蚂蚁体结合预测了潜在的影响水力裂缝延伸的压裂屏障。其次利用三维地震获得的上述信息指导压裂方案设计及施工参数调整。最后,综合三维地震解释结果和微地震成像结果解释了压裂施工过程中出现砂堵的原因,明确了致密砂岩储层水力裂缝延伸及天然裂缝开启闭合控制因素。更多还原

【Abstract】 The development of unconventional resources,such as shale gas and tight sand gas,requires the integration of multi-disciplinary knowledge to resolve many engineering problems in order to achieve economic production levels.The reservoir heterogeneity revealed by different data sets,such as 3D seismic and microseismic data,can more fully reflect the reservoir properties and is helpful to optimize the drilling and completion programs.First,we predict the local stress direction and open or close status of the natural fractures in tight sand reservoirs based on seismic curvature,an attribute that reveals reservoir heterogeneity and geomechanical properties.Meanwhile,the reservoir fracture network is predicted using an ant-tracking cube and the potential fracture barriers which can affect hydraulic fracture propagation are predicted by integrating the seismic curvature attribute and ant-tracking cube.Second,we use this information,derived from 3D seismic data,to assist in designing the fracture program and adjusting stimulation parameters.Finally,we interpret the reason why sand plugs will occur during the stimulation process by the integration of 3D seismic interpretation and microseismic imaging results,which further explain the hydraulic fracture propagation controlling factors and open or closed state of natural fractures in tight sand reservoirs.更多还原