桥塞射孔分段压裂工艺在页岩气井——JY8-2HF井中的应用

JY8-2HF井钻遇的上奥陶统五峰组-下志留统龙马溪组为黑色碳质泥岩页岩气气藏,储集空间类型多样,主要包含了有机质孔、晶间孔、粒间孔、溶蚀孔、有机质收缩孔、构造裂缝及页理缝等,通过对该井采用电缆桥塞＋射孔联作分段压裂工艺,优化压裂施工参数,优选压裂液和支撑剂组合,采取前置酸化和桥塞泵送降压处理技术,成功进行了压裂施工,JY8-2HF井压后用12 mm油嘴试气求产,日产气54.72万立方米,取得了较好的压裂效果.

Bridge plug perforation staged fracturing technology in shale gas wells-JY8-2HF wells

JY8-2HF wells drilled in the upper ordovician Wufeng-Lower Silurian Longmaxi black carbonaceous shale gas shale gas reservoirs. Diverse types of reservoir space,mainly contains organic hole intergranular pore, intergranular holes, corrosion holes, organic shrink-age holes, cracks and construction joints and other foliation. By using the well perforation associated cable bridge plug ＋ for staged fracturing process, fracturing optimization parame-ters, preferably a combination of fracturing fluid and proppant, taking pre-acidification and bridge plugs pumping buck processing technology, successfully conducted fracturing. After fracturing JY8-2HF well pressure gas test with a 12 mm choke demand production, gas 54.72 Articles Nissan / day, achieved good fracturing results.