SN0144i-XX小井眼测井仪器套捞一体打捞技术研究及应用  

Study and Application of Integrated Fishing Technology for Logging Instrument Set of SN0144i-XX Small Well

作　　者：史配铭 李刚 刘振 SHI Peiming;LI Gang;LIU Zhen(Changqing Drilling Company,Petrochina Chuanqing Drilling Engineering Co.,Ltd.,Xi'an,Shaanxi 710018,China)

机构地区：[1]中国石油集团川庆钻探工程有限公司长庆钻井总公司,陕西西安710018

出　　处：《石油工业技术监督》2025年第2期1-6,共6页Technology Supervision in Petroleum Industry

基　　金：中国石油集团川庆钻探工程有限公司长庆钻井总公司致密气藏工程技术中心重点科技计划项目“苏南小井眼电测成功率提升技术研究”(编号:CQ2024B-9-8-3-Z)。

摘　　要：SN0144i-XX井是一口目的层为马家沟组碳酸盐岩储层小井眼井,完钻井深3805 m,152.4 mm裸眼段长3040 m,最大井斜24°,最大狗腿度4.05°,钻井液密度1.16 g/cm^(3)。井口起仪器过程中Φ57 mm测井仪器串落井,因井眼、仪器尺寸较小,仪器串结构复杂,仪器串抗拉抗压参数受限,落井仪器状态不明等问题,采用常规打捞技术已不能满足Φ152.4 mm小井眼中Φ57 mm测井仪器串的打捞要求,为此,通过分析测井仪器结构,每趟打捞出井仪器结构及落鱼在井筒内的相对位置及状态,开展套捞一体式专用打捞工具的设计制作、打捞方案的制定等研究,采用磁定位仪器确定鱼头技术,精准确定鱼头位置,提高仪器打捞成功率,设计制作了Φ146 mm大引鞋+Φ110 mm卡瓦打捞筒、Φ143 mm套铣头栽钢丝+内嵌式Φ110 m卡瓦打捞筒、Φ143 mm套铣管开窗+内嵌式Φ110 mm卡瓦打捞筒等套捞一体式打捞工具,进行26次的连续打捞作业,耗时45 d成功捞出落井仪器串19 m。阐述了小井眼裸眼井测井仪器落井后开展的套捞一体式非常规打捞工具设计加工、打捞方案编制及关键打捞措施,为今后类似测井仪器落井非常规打捞作业提供了一定的技术参考。Well SN0144i-XX is a small borehole in carbonate reservoir of Majiagou Formation.The completed drilling depth of well SN0144i-XX is 3805 m,the open hole length is 3040 m,the maximum well deviation is 24°,the maximum dogleg degree is 4.05°,and the drilling fluid density is 1.16 g/cm^(3).The Φ57 mm logging instrument fell into the well during the process of wellhead lifting.Due to the small size of the hole and instrument,the complex structure of the instrument string,the limited tensile and compressive parameters of the instrument string,and the unknown state of the falling instrument,etc.,conventional fishing technology cannot meet the fishing requirements of Φ57 mm logging string in Φ152.4 mm small hole.Therefore,through the analysis on the logging instrument structure,the relative position and status of the well instrument structure and the fallen fish in the well in each trip,the study on the design and production of the special fishing tools and the formulation of the fishing scheme was carried out.By using magnetic positioning instrument to determine the fish head technology,accurately determine the location of the fish head,and improve the fishing success rate of the instrument,a set of integrated fishing tools was designed and produced,includingΦ146 mm large guide shoe+Φ110 mm Salvage barrel,Φ143 mm milled head steel wire+embeddedΦ110 m slip socket,Φ143 mm milled tube window+embeddedΦ110 mm slip socket and other sets of fishing integrated fishing tools.And then 26 continuous fishing operations were carried out,which took 45 days to pull out the instrument string of 19 m.This paper describes the design and processing of the integrated unconventional fishing tool,the drafting of the fishing plan and the key fishing measures,which can provide some technical reference for the unconventional fishing operation of similar logging equipment in the future.

关 键 词：小井眼 裸眼井 测井仪器 套捞一体式打捞工具 打捞技术 

分 类 号：TE28[石油与天然气工程—油气井工程]