苏里格气田致密气藏水平井优快钻井技术

Optimized Fast Drilling Technology for Horizontal Wells in the Tight Gas Reservoirs in Sulige Gas Field

史配铭 薛让平 王学枫 王万庆 石崇东 杨勇

SHI Peiming XUE Rangping WANG Xuefeng WANG Wanqing SHI Chongdong YANG Yong

中国石油集团川庆钻探工程有限公司长庆钻井总公司，陕西西安 710018

Changqing Drilling Company, CNPC Chuanqing Drilling Engineering Co. Ltd., Xi’an, Shaanxi, 710018, China

苏里格气田致密气藏水平井钻井时存在机械钻速低、地层井漏坍塌漏并存、钻井周期长等问题。为此，在分析钻遇地层情况和钻井技术难点的基础上，开展了 “工厂化”水平井钻井模式优化、“高效PDC钻头+大功率螺杆”激进参数钻井技术、不同偏移距井眼轨迹控制模式优化和强抑制低密度CQSP-4防塌钻井液分段优化等研究，形成了苏里格气田致密气藏水平井优快钻井技术。2019年苏里格气田应用致密气藏水平井优快钻井技术完钻56口井，平均机械钻速12.76 m/h，钻井周期39.12 d，建井周期52.20 d，较2018年平均机械钻速提高了23.16%，钻井周期缩短了23.71%，建井周期缩短了16.02%。研究与应用表明，苏里格气田致密气藏水平井钻井关键技术提速效果显著，为苏里格气田致密气藏高效开发提供了技术支撑。

Problems occur when drilling horizontal wells in the tight gas reservoirs in Sulige Gas Field. They include low ROP, contradiction between formation collapse and lost circulation, long drilling cycles, etc. By analyzing the formation drilling challenges, technical research of factory drilling of horizontal wells was conducted to determine the best path forward. The areas studied included drilling mode optimization, “high efficiency PDC bit + high-power PDM” aggressive drilling technology, mode optimization of wellbore trajectory control technology with different offsets and sectional optimization of strongly inhibitive low-density CQSP-4 anti-collapse drilling fluid system. After the study was completed, recommendations were made regarding forming a new optimized fast drilling technology for horizontal wells in the tight gas reservoirs in Sulige Gas Field. In 2019, this technology was applied in 56 wells in Sulige Gas Field, with an average ROP of 12.76 m/h, an average drilling cycle of 39.12 days, and a well construction period of 52.20 days. Compared with those in 2018, in 2019 the ROP increased by 23.16%, the drilling cycle was shortened by 23.71% and the well construction period was reduced by 16.02%. The research and application showed that the key technology for horizontal wells drilling in the tight gas reservoirs in Sulige Gas Field had a remarkable effect on drilling acceleration, which provided technical support and the basis for best practices for the efficient development of the tight gas reservoirs in Sulige Gas Field.

中国石油集团川庆钻探工程有限公司长庆钻井总公司重点科技计划项目“苏里格气田致密气藏水平井优快钻井技术研究”（编号：F-L20719KF）部分内容

https://doi.org/10.11911/syztjs.2020083