吉木萨尔页岩油水平井钻井技术实践  

Drilling Technologies for Shale Horizontal Wells in Jimsar

作　　者：吴继伟 袁丹丹 席传明 刘可成 张文波 WU Jiwei;YUAN Dandan;XI Chuanming;LIU Kecheng;ZHANG Wenbo(Engineering Technology Research Institute,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石油新疆油田分公司工程技术研究院

出　　处：《钻采工艺》2021年第3期24-27,共4页Drilling & Production Technology

基　　金：中国石油集团重大专项“陆相中高成熟度页岩油勘探开发关键技术研究与应用”子课题“页岩油优快钻完井关键技术研究与应用”(编号:2019E-2605)。

摘　　要：吉木萨尔页岩油3000m以浅部署的水平井水平段长度普遍在1000~2000m左右,井斜角近90°,增斜段、水平段地层钻进存在着钻压传递、井眼清洁、井壁稳定等技术难点,从井身结构优化、PDC钻头优选、“大功率螺杆+水力振荡器”协同提速导向、复合盐钻井液体系优化等方面入手,研究形成了吉木萨尔浅层页岩油水平井钻井关键技术。2019年应用该技术在吉木萨尔油田钻水平井22口,井身结构由“三开”变为“二开”,平均水平段长1538m,平均机械钻速8.81m/h,平均钻完井周期66.38d;与前期水平井相比,旋转导向工具占比由100%降至28%,平均水平段长增加291m,但平均钻完井周期仍缩短7.1d。实践表明,吉木萨尔页岩油水平井钻井技术有效缓解了页岩油水平井提速对进口旋转导向工具的依赖,满足了吉木萨尔页岩油效益开发的需求,也为国内页岩油水平井开发提供了借鉴。The lateral section length of horizontal wells with shallow deployment of 3000 m in Jimsar shale oil field is generally about 1 000 ~ 2 000 m,and the well inclination angle is nearly 90°.There are technical difficulties in drilling the curve and horizontal sections such as WOB transfer,hole cleaning and wellbore stability.In response to the above problems,starting with the optimization of the well structure,the optimization of high-efficiency PDC bits,the " high-power screw + hydraulic oscillator" coordinated with the speed-increasing steering,and the optimization of the compound salt drilling fluid system,the study formed the key drilling technology of Jimsar shallow shale oil horizontal well.In 2019,this technology was applied to drill 22 horizontal wells in Jimsar Oilfield.The wellbore structure was changed from " three-spud" to " two-spud".The average horizontal section length was 1 538 m,the average ROP was 8.81 m/h,and the average drilling and completion period is 66.38 day.Compared with the previous horizontal wells,the proportion of rotary steering tools has dropped from 100% to 28%,and the average horizontal section length has increased by 291 m,but the average drilling and completion period is still shortened by 7.1 day.The practice has shown that the key technology for drilling horizontal wells in Jimsar shallow shale oil effectively alleviates the dependence of shale oil horizontal wells on imported rotary steering tools,and meets the demand for benefit development of Jimsar shale oil,and provides a reference for domestic shale oil horizontal well development.

关 键 词：吉木萨尔 页岩油 定向井 浅层水平井 旋转导向 

分 类 号：TE243[石油与天然气工程—油气井工程]