苏76-1-20H井钻井技术

Drilling technology for Well Su76-1-20H

王先洲 蒋明 邓增库 夏景刚 王保军 刘从胜

WANG Xianzhou JIANG Ming DENG Zengku XIA Jinggang WANG Baojun LIU Congsheng

中国石油渤海钻探第五钻井工程分公司，河北河间　062450

No. 5 Drilling Engineering Company, BHDC, Hejian 062450, China

为提高低孔低渗气藏的开采效率，渤海钻探在苏里格气田部署了一口长水平段水平井—苏76-1-20H井。苏76-1-20H井存在水平段长、轨迹控制难、井眼尺寸小、循环泵压高、井眼清洁难度大、井壁垮塌、钻具变形等钻井难点，文中针对钻井难点，从井眼轨迹控制、摩阻扭矩预测控制、地质导向技术、钻井液技术、井眼修复技术、事故复杂预防等方面都采取相应的措施。该井实钻水平段长2 856 m，创造了中国石油陆上水平段最长记录，施工过程安全顺利，积累了长水平段水平井钻井技术经验，对高效开发低孔低渗油气田具有重要的指导意义。

To improve the development efficiency of low porosity and low permeability gas reservoirs, A long lateral horizontal well was drilled in Sulige gas field, which is Well Su76-1-20H. Based on the borehole structure and wellbore trajectory design for the well, the difficulties were proposed, which were long lateral, large friction torque, hard trajectory control, small wellbore size, high circulation pump pressure, difficult wellbore cleaning treatment, wellbore collapse, drilling tool deformation, technical casing wearing, and so on. The key techniques and application effect were illustrated detailed from the viewpoint of trajectory control, friction torque prediction, geosteering technique, drilling fluid technique, wellbore repairing technique, and complex accident prevention. The well creates the record of the longest horizontal section on land within CNPC, with the horizontal length of 2 856 m, and safety and smooth drilling process, which proves important guiding role for efficiently develop low porosity and low permeability oil and gas fields.