福山凹陷花场构造花东12x井侧钻施工实践
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摘要
以花东12x大斜度井地质资料及工程资料为基础,分析了该井实施侧钻作业的必要性,并对施工情况进行了剖析。结果表明,花东12x井原井眼井斜大,井壁失稳,垮塌、掉块严重,划眼通井无效,井下情况复杂,必须实施侧钻作业。基于大井斜段侧钻施工的难点,根据裸眼注水泥塞侧钻的关键技术要求及水泥浆的不确定性,总结了大斜度井侧钻打水泥塞的技术原则;提出了合理选择侧钻点的因素;结合井底力学分析模型,优选采用牙轮钻头,保持工具面稳定,提高侧钻效率;合理建议侧钻启始造台阶应采取控时控压钻进措施,确保成功率。同时针对总包井项目工程出现的两次注水泥塞和两次侧钻施工进行了剖析,指出现场施工时除侧钻工艺技术很重要外,强化管理,也能提高速度,提高效率。
Based on the geologic data and engineering data of Well Huadong 12x,we analyzed the necessity of conducting sidetracking operation in the well and dissected the construction quo. Results showed that sidetracking had to be applied to the original Well Huadong 12x for its high deviation,instable borehole,severe collapse,invalid wiper trip,and complicated downhole conditions. In view of the difficulties in sidetracking of highly deviated sections,according to key technical requirements of sidetracking with open-hole cementing plug and uncertainties of cement slurry,we summed up four principles for highly deviated sidetracking with cementing plug,put forward factors for rationally selecting sidetracking points,selected roller bit to maintain stable tool face and improve sidetracking efficiency in combination with the model for bottom-hole mechanics analysis,and proposed to drill with controlled time and pressure at initial sidetracking stage to ensure success rate. Meanwhile,we analyzed two times of cementing plug and two times of sidetracking operation of total package well projects,and pointed out that to strengthen control over site construction in addition to sidetracking process could speed up drilling and enhance efficiency.
Based on the geologic data and engineering data of Well Huadong 12x,we analyzed the necessity of conducting sidetracking operation in the well and dissected the construction quo. Results showed that sidetracking had to be applied to the original Well Huadong 12x for its high deviation,instable borehole,severe collapse,invalid wiper trip,and complicated downhole conditions. In view of the difficulties in sidetracking of highly deviated sections,according to key technical requirements of sidetracking with open-hole cementing plug and uncertainties of cement slurry,we summed up four principles for highly deviated sidetracking with cementing plug,put forward factors for rationally selecting sidetracking points,selected roller bit to maintain stable tool face and improve sidetracking efficiency in combination with the model for bottom-hole mechanics analysis,and proposed to drill with controlled time and pressure at initial sidetracking stage to ensure success rate. Meanwhile,we analyzed two times of cementing plug and two times of sidetracking operation of total package well projects,and pointed out that to strengthen control over site construction in addition to sidetracking process could speed up drilling and enhance efficiency.
引文
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[2]杨仲涵,何世明,郑锋辉.悬空侧钻技术在大牛地气田DP22水平井的应用[J].石油钻采工艺,2012,34(3):20-23.
[3]王恒.裸眼侧钻关键技术的研究与应用[J].探矿工程(岩土钻掘工程),2011,38(10):26-29.
[4]陈本顺,韩金宝,沈献良.刘28井深部侧钻技术[J].石油钻探技术,2002,30(5):65-66.
[5]刘易思,金莉,甘涛.宜18井大斜度侧钻钻水平井技术[J].钻采工艺,2006,29(5):18-19.
[6]刘修善.三维侧钻绕障井的设计方法[J].石油学报,2009,30(6):916-922.
[7]陶永金,鄢捷年,杨国辉,等.昆2井优快钻井及油气层保护技术[J].中国石油勘探,2006,11(6):77-84.
[8]于连杰,魏向辉,曹丽萍.特殊井PDC钻头[J].石油科技论坛,2013,32(3):50-51.
[9]于连杰,魏向辉,张松峰.定向PDC钻头[J].石油科技论坛,2011,30(2):51-62.
[10]李光翼,牟德刚,张浩.曲斜七井悬空侧钻技术[J].石油钻探技术,1999,27(3):9-10.
[11]任家川,蒋才军.川孝267井定向侧钻井卡钻及事故处理[J].钻采工艺,2003,26(1):17-19.