苏里格气田首口分支水平井钻完井技术

Drilling completion technology for the first branch horizontal well in Sulige Gas Field

程元林 韦海防 吴学升 杜松涛 谢新刚 黄占盈

CHENG Yuanlin WEI Haifang WU Xuesheng DU Songtao XIE Xingang HUANG Zhanying

川庆钻探钻采工程技术研究院长庆分院·低渗透油气田勘探开发国家工程实验室，陕西西安　710018 长庆油田公司油气工艺研究院，陕西西安　710018

Changing Branch of CCDE Drilling & Production Engineering Technology Research Institute, National Engineering Laboratory for Exploration &

苏里格气田属典型低压、低渗、低产的“三低”气田，总体上看储层物性较差，常规水平井开发效率较低，中低产井占绝大多数。为了提高苏里格气田水平井单井产量，提高开发效率，降低综合开发成本，针对苏里格气田多套气藏发育的地质特点，开展了分支水平井钻完井技术研究及现场试验。文中从施工难点、井身结构、侧钻技术、完井方式等方面介绍了苏里格气田首口双分支水平井——T7-14-18H井的钻完井关键技术及现场试验，该井成功实现了水平井段裸眼完井+分段压裂增产改造，初步探索出了一套符合苏里格气田开发需要的分支水平井钻完井配套技术，为低渗透油气田经济高效开发探索出了一条新的技术途径。

Sulige gas field is a typical low permeability, low production low pressure gas field, with relatively poor formation property, and low efficiency of exploration development for conventional horizontal wells, and low-to-moderate production wells take absolutely majority proportion. Considering the formation characteristics of developed multi pay zone, the drilling completion technology researches over branch horizontal wells and filed applications are conducted, to further promote the individual production, to increase exploration efficiency, and to reduce integrative exploration cost. In the paper, from the viewpoint of operation difficulties, wellbore structure, sidetracking skills, completion method, etc., some key drilling completion technologies and applications are introduced on Well T7-14-18H, which is the first double-branch horizontal well in Sulige Gas Field. It is achieved that completion with openhole horizontal section + sectional fracturing stimulation techniques successfully. A set of branch horizontal drilling completion technology is preliminarily formed to fulfill the exploration requirement of Sulige Gas Field, which provide a new technology direction and measure to explore and develop low permeability oil gas fields.