武隆区块常压页岩气藏低成本压裂技术  

Low-Cost Fracturing Technology in Normal-Pressure Shale Gas Reservoirs in Wulong Block

作　　者：周博成 熊炜[2] 赖建林[2] 房启龙[2] ZHOU Bocheng;XIONG Wei;LAI Jianlin;FANG Qilong(Sinopec Chongqing Shale Gas Co.,Ltd.,Chongqing,408400,China;Petroleum Engineering Technology Research Institute,Sinopec East China Oil&Gas Company,Nanjing,Jiangsu,210019,China)

机构地区：[1]中石化重庆页岩气有限公司,重庆408400 [2]中国石化华东油气分公司石油工程技术研究院,江苏南京210019

出　　处：《石油钻探技术》2022年第3期80-85,共6页Petroleum Drilling Techniques

基　　金：中国石化科技攻关项目“常压页岩气钻完井及配套工艺技术研究”(编号:P21087-5)资助。

摘　　要：武隆区块常压页岩储层能量低,产量较低,实现效益开发难度大,为此,开展了低成本压裂开发技术研究。在分析武隆区块压裂改造技术难点的基础上,进行了诱导应力计算、压裂裂缝模拟和压裂费用对比,优化了压裂段长、簇数和压裂施工参数,优选了压裂材料和压裂设备,形成了“短段长+单簇滑套+低黏滑溜水+低成本石英砂+高砂比连续加砂”的压裂施工工艺,并在武隆区块A井进行现场试验。通过应用无限级滑套完井工艺和实时调整现场压裂参数,A井压后产量与同平台“中等段长+密切割+全陶粒支撑剂”压裂井产量相当,压裂成本降低52.8%,并实现了单井单日8段压裂施工。低成本压裂技术为武隆区块常压页岩气的效益开发提供了新的技术途径。Normal-pressure shale reservoirs in Wulong Block have low energy and production, and suffer from difficulties in beneficial development. For this reason, a low-cost fracturing technology was studied for its development. Considering difficulties of fracturing stimulation in Wulong Block, induced stress calculation, fracture simulation, and fracturing cost comparisons were carried out. This allowed the fracturing stage length, number of clusters, and operation parameters to be optimized. Further, the fracturing materials and equipment were chosen. A new fracturing technology was thereby developed, involving a short fracturing stage length, a single-cluster sleeve, lowviscosity slick water, low-cost quartz sand, continuous sand addition at a high proppant concentration, which was then applied in the field test on Well A in Wulong Block. Through the application of the unlimited sliding sleeve completion and the real-time adjustment of on-site fracturing parameters, the production of Well A after fracturing was comparable to that of the fracturing well on the same platform with fracturing parameters of a medium fracturing stage length, tight cluster spacing, and ceramic proppants. In this study, the fracturing cost was reduced by 52.8%, and the fracturing performance sped up to 8 stages per day. The low-cost fracturing technology has provided technical reference for the beneficial development of normal-pressure shale gas in Wulong Block.

关 键 词：常压页岩气 水力压裂 低成本开发 压裂参数优化 无限级滑套 武隆区块 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]