深层砂砾岩储层差异化改造技术优化与应用

Optimization and application of differentiated stimulation method for deep sandstone reservoirs

深层砂砾岩储层内部结构复杂,储层致密且具有很强的非均质性,在压裂改造过程中存在扭曲、绕砾、穿砾等一系列复杂裂缝扩展现象,采用常规加砂压裂增产效果欠佳。针对桩古12块深层砂砾岩储层存在的断层发育、岩性复杂、物性差异大等改造难点,通过对不同井区进行差异化组合缝网储层改造技术的优化,结合复合暂堵、脉冲注入、支撑剂高效铺置等配套改造工艺,开展现场试验并取得良好效果,为陆上深层砂砾岩储层的高效开发提供较好借鉴。

The deep sandstone and gravel reservoir Has a complex internal structure,with a dense reservoir and strong Heterogeneity.During the Hydraulic fracturing process,there are complex fracture extension phenomena such as twisting around gravel,passing through gravel,etc.The conventional sand injection Hydraulic fracturing Has poor production effect.For the difficulties in Hydraulic fracturing of the deep sandstone and gravel reservoir in Zhanggu12 block,such as the development of faults,complex rock types,and large differences in physical properties,through the optimization of differential combination of fracture network reservoir modification technology for different well areas,combined with the supporting technologies of composite plugging,pulse injection,and efficient placement of proppants,on-site tests were conducted and good results were achieved,providing a good reference for the efficient development of deep sandstone and gravel reservoirs on land.