苏77-21-40H2 水平井超长水平段钻井技术

Drilling technology for ultra-long horizontal section of horizontal well Su 77-21-40H2

陈涛 冉照辉 罗亮 柯学 孙亚平 南鑫

CHEN Tao RAN Zhaohui LUO Liang KE Xue SUN Yaping NAN Xin

中国石油西部钻探钻井工程技术研究院，新疆克拉玛依　834000 中国石油西部钻探苏里格气田项目经理部，内蒙古乌审旗　017300 中国石油新疆油田分公司开发公司，新疆克拉玛依　834000 中国石油西部钻探工程有限公司，新疆乌鲁木齐　830011

Drilling Engineering and Technology Research Institute, Xibu Drilling Engineering Company Limited, CNPC, Karamay 834000, China Sulige Gasfield Project Management Team, Xibu Drilling Engineering Company Limited, CNPC, Uxin Banner 017300, China Development Company of Xinjiang Oilfield Company, CNPC, Kalamay 834000, China Xibu Drilling Engineering Company Limited, CNPC, Urumqi 830011, China

随着水平井作为苏里格气田经济规模开发主体技术之一，进一步增加水平段施工长度用以更大限度提高单井产量的需求越来越迫切。针对苏里格气田苏77 区块苏77-21-40H2 井超长水平段突出的钻井难点：钻压传递困难、井眼清洁困难、井壁稳定难度大、完井大尺寸压裂工具下入困难等，通过采用优化井眼剖面、引入新型减摩降阻工具、优化钻具组合、MEG 聚磺钻井液体系、加装顶驱设备、保障压裂工具下入及严格工程配套措施等多项技术对策，大幅度提高了该井水平段的延伸长度和机械钻速。该井顺利完钻时实际水平段长度2 303 m，为苏里格气田水平井的进一步开发提供了经验。

With the horizontal well technology adopted as one of main technologies used for economic-scale development of Sulige Gasfield, the trend to maximizing the production output per well by further increasing the operation length of horizontal section has become more and more imminent. Aiming at the drilling difficulties in ultra-long horizontal section of Well Su 77-21-40H2 in Sulige Gasfield (namely difficult transmission of drilling pressure, difficult cleaning of wellbore, poor wellbore stability and difficult lowering of large-size fracturing tool in completion operation), by taking several technical countermeasures such as optimizing the wellbore profile, introducing the new-type friction resistance reducing tools, optimizing the drilling tool combination and MEG polysulfonate drilling fluid system, installing the top drive equipment, ensuring the smooth lowering of fracturing tool and strictly implementing the supporting measures, the extension length and mechanical drilling speed of the horizontal section of such well have been greatly improved. When the drilling of this well was smoothly completed, the actual length of horizontal section was 2 303 m, which has provided the experience for further development of horizontal wells in Sulige Gasfield.

10.13639/j.odpt.2015.06.001