涪陵地区页岩气水平井低承压配套固井技术  

Low Pressure-Bearing Matching Cementing Technology for Shale Gas Horizontal Wells in Fuling Area

作　　者：何吉标[1] 陈智源[1] 刘俊君[1] 周福[2] 袁欢[2] 

机构地区：[1]中石化江汉石油工程有限公司页岩气开采技术服务公司,湖北武汉430074 [2]中石化江汉石油工程有限公司钻井一公司,湖北潜江433121

出　　处：《江汉石油职工大学学报》2016年第5期33-35,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：受焦石断背斜两侧的大断裂带影响,涪陵南区及边界井目的层裂缝发育,钻井漏失复杂情况逐渐增多,而在油基钻井液条件下堵漏提承压材料相对较少,固井时存在较大的漏失风险,极易导致水泥浆返高不够而形成漏封,严重影响全井封固质量。通过对现场情况的摸索和总结,对前置液、水泥浆体系和固井施工工艺进行防漏堵漏优化研究,在有效提高固井质量的同时增强封堵能力,形成了一套成熟的页岩气水平井低承压配套固井技术,并在涪陵工区漏失复杂井进行了广泛应用。应用效果表明,固井优良率由初期的64.28%提高到了80%,固井质量明显回升,这套固井技术能够满足涪陵地区固井施工易漏失井的固井技术要求。Aiming at more complicated drilling leakage and possible leakage risk in well completion,this paper studies how to improve prepad fluid,slurry system and cementing technology in leakage protection and sealing to enhance well cementing quality and strengthen sealing capacity,thus forming a mature low pressure-bearing matching cementing technology for shale gas horizontal wells.It has been applied to complicated leakage wells in Fuling workzone.Application effect shows that qualified ratio of well cementation increases to 80%from early 64.28%and this technology is suitable for Fuling workzone where well leakage is likely to occur in cementing operation.

关 键 词：涪陵地区 页岩气 固井技术 水平井 

分 类 号：TE256[石油与天然气工程—油气井工程]