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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。
The development of unconventional resources, such as shale gas and tight sandstone gas, calls for comprehensive utilization of multidisciplinary knowledge to solve many engineering problems for economic productivity. The heterogeneity of reservoir revealed by different types of data such as 3D seismic and microseismic data reveals reservoir characteristics more thoroughly and optimizes drilling and completion procedures. In this study, we first predict the local stress direction and the natural fracture closure state by using the 3D seismic curvature attribute, and obtain the reservoir heterogeneity information and geomechanical properties. Using the ant body to predict the reservoir fracture network and the use of curvature and The combination of ants predicts a potential fracture that affects hydraulic fractures. Secondly, the above information obtained by 3D seismic guidance the design of fracturing scheme and the adjustment of construction parameters. Finally, the causes of sand blockage in fracturing construction are explained by the integrated three-dimensional seismic interpretation results and microseismic imaging results. The control factors of hydraulic fractures extension and natural fracture opening and closing of tight sandstone reservoirs are clarified.