陈海宇, 王新东, 林晶, 陈涛, 李辉, 范琳. 新疆吉木萨尔页岩油超长水平段水平井钻井关键技术[J]. 石油钻探技术, 2021, 49(4): 39-45. DOI: 10.11911/syztjs.2021036
引用本文: 陈海宇, 王新东, 林晶, 陈涛, 李辉, 范琳. 新疆吉木萨尔页岩油超长水平段水平井钻井关键技术[J]. 石油钻探技术, 2021, 49(4): 39-45. DOI: 10.11911/syztjs.2021036
CHEN Haiyu, WANG Xindong, LIN Jing, CHEN Tao, LI Hui, FAN Lin. Key Drilling Techniques for Horizontal Wells with Ultra-Long Horizontal Sectionin the Shale Oil Reservoir in Jimusar, Xinjiang[J]. Petroleum Drilling Techniques, 2021, 49(4): 39-45. DOI: 10.11911/syztjs.2021036
Citation: CHEN Haiyu, WANG Xindong, LIN Jing, CHEN Tao, LI Hui, FAN Lin. Key Drilling Techniques for Horizontal Wells with Ultra-Long Horizontal Sectionin the Shale Oil Reservoir in Jimusar, Xinjiang[J]. Petroleum Drilling Techniques, 2021, 49(4): 39-45. DOI: 10.11911/syztjs.2021036

新疆吉木萨尔页岩油超长水平段水平井钻井关键技术

Key Drilling Techniques for Horizontal Wells with Ultra-Long Horizontal Sectionin the Shale Oil Reservoir in Jimusar, Xinjiang

  • 摘要: 为解决新疆吉木萨尔页岩油超长水平段水平井水平段钻井中井眼失稳和摩阻过大的问题,满足3 000~3 500 m长水平段安全快速钻井需求,进行了井身结构优化、双二维井眼轨道设计、根据井眼清洁情况确定钻井参数等降摩减阻技术研究,并在室内优化配制了抑制性强、稳定性好、润滑性强的油基钻井液,研究形成了新疆吉木萨尔页岩油超长水平段水平井钻井关键技术。该技术在现场试验3口井,水平段机械钻速达到10.9 m/h,缩短了钻井周期,3口水平井的通井、电测和下套管作业均一次完成,钻井完井过程中未发生井下故障,并创造了国内非常规油气藏最长水平段纪录。研究与应用结果表明,该技术可以满足新疆页吉木萨尔页岩油示范区超长水平段水平井安全高效钻井和进一步提高水平段延伸能力的技术需求,值得推广应用。

     

    Abstract: Borehole instability and excessive friction were encountered during drilling the ultra-long horizontal section of horizontal wells in the shale oil reservoir in Jimusaer, Xinjiang. For safe and fast drilling of horizontal sections of 3 000–3 500 m, a friction reduction study was performed, such as optimization of the casing program, design of a dual two-dimensional trajectory, and determination of drilling parameters based on wellbore cleaning condition, etc. Moreover, an oil base drilling fluid formula with excellent performance in inhibition, stability and lubricity was identified in the laboratory. Finally, the key drilling techniques were developed for the horizontal wells with ultra-long horizontal section in the shale oil reservoir in Jimusaer, Xinjiang. The techniques were applied in three wells with a penetration rate of 10.9 m/h in the horizontal section and greatly reduced drilling time. The drifting process, electric logging and casing running in those wells were all successful in one run, without any occurrence of downhole complex situations during drilling and completion. It set the longest horizontal section record of unconventional oil and gas reservoirs in China. Research and application results show that the techniques can meet the technical requirements for safe and efficient drilling of the horizontal wells with ultra-long horizontal section in shale oil demonstration area in Jimusaer, Xinjiang and further improve the extension capacity of the horizontal section, and it is worthy of popularization and application.

     

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