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水力压裂是实现超低渗储层有效开发的一项关键技术,其压裂裂缝展布特点对超低渗油藏的开发效果有着至关重要的作用。本文以超低渗储层压裂裂缝形态为研究对象,根据零污染示踪剂、DSI、试井解释、微地震多种方法的裂缝解释结果,总结了超低渗储层条件下压裂裂缝在高度、长度、方位、对称性、微裂缝利用、支撑剖面共六个方面的特点,并分析了裂缝特点对单井产量和水驱效果的影响。在此基础上,论述了“缝内暂堵”工艺条件下的裂缝扩展特点。本文中所阐述的结论和认识对超低渗油藏合理布缝和开发技术政策调整具有参考价值。
Hydraulic fracturing is one of the key technologies for the effective development of ultra-low permeability reservoirs. The fracturing distribution of fractures plays a crucial role in the development of ultra-low permeability reservoirs. In this paper, fracturing fractures of ultra-low permeability reservoirs are studied. Based on the interpretation results of zero-contamination tracer, DSI, well test interpretation and microseismic methods, the fracturing cracks in ultra-low permeability reservoirs The characteristics of six aspects including height, length, azimuth, symmetry, utilization of micro-fracture and support section are analyzed. The influence of fracture characteristics on single-well production and waterflooding effect is also analyzed. On this basis, the characteristics of crack propagation under the condition of “temporary plugging inside the seams” are discussed. The conclusions and understanding elaborated in this article have reference value for the technical policy adjustment of rational seam construction and development in ultra-low permeability reservoirs.