涪陵页岩气田焦石坝区块调整井钻井技术

Drilling Technology for Adjustment Wells of the Jiaoshiba Block in the Fuling Shale Gas Field

范红康 刘劲歌 臧艳彬 周贤海 艾军 宋争

FAN Hongkang LIU Jinge ZANG Yanbin ZHOU Xianhai AI Jun SONG Zheng

页岩油气富集机理与有效开发国家重点实验室，北京 102206 中国石化石油工程技术研究院，北京 102206 中国石化江汉油田分公司，湖北潜江 433121 中石化重庆涪陵页岩气勘探开发有限公司，重庆 408014

State Key laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing, 102206, China Sinopec Research Institute of Petroleum Engineering, Beijing, 102206, China Sinopec Jianghan Oilfield Company, Qianjiang, Hubei, 433121, China Sinopec Chongqing Fuling Shale Gas Exploration & Development Co. Ltd., Chongqing, 408014, China

随着涪陵页岩气田焦石坝区块进入开发调整期，单井可采储量降低，要继续经济开发就需要缩短钻井周期、降低钻井成本。为了实现钻井提速降本，进行了钻井优化设计、超长水平段钻井、强化参数钻井提速、基于等寿命理念的“一趟钻”钻井、“钻刮通洗一体化”完井和长效密封固井等方面的技术攻关，形成了涪陵页岩气田焦石坝区块调整井钻井技术。现场应用结果显示，调整井平均水平段长度达到2 096 m，同比涪陵页岩气田焦石坝区块一期增加37.8%；平均机械钻速达到9.49 m/h，同比一期提高26.2%；钻井周期62.27 d，同比一期缩短26.0%；环空带压比例由一期的70.0%降至4.6%。研究表明，涪陵页岩气田焦石坝区块调整井钻井关键技术满足了焦石坝区块部署调整井的技术需求，支撑了涪陵页岩气田稳产增效。

With the Jiaoshiba Block in the Fuling Shale Gas Field entering into the development and adjustment period, the recoverable reserves of single well are reduced. To develop the field economically, it is necessary to shorten the drilling cycle and reduce the drilling cost. Therefore, with the optimum design of drilling, drilling of ultra-long horizontal sections, increasing rate of penetration by optimization in drilling parameters, a “one-trip drilling” technique based on equal-life idea, integration of drilling, reaming and flushing in well completion, and long-term sealing technology in cementing, the drilling technology for adjustment wells of Jiaoshiba Block of the Fuling Shale Gas Field was formed. Field application results showed that the average length of horizontal sections in adjustment wells was 2 096 m, 37.8% longer than that in drilling the first phase drilling there. The average penetration rate reached 9.49 m/h, 26.2% higher than that in the first phase drilling and the drilling cycle was 62.27 d, which was 26.0% shorter than in the past. The percentage of wells with annular pressure lowered from 70.0% to 4.6%. The results show that the proposed key drilling technology could meet the technical needs of adjustment wells of Jiaoshiba Block of the Fuling Shale Gas Field, and provide supports for a stable production and more effective development of the Fuling Shale Gas Field.

国家科技重大专项“涪陵页岩气水平井钻完井技术”（编号：2016ZX05060-012）资助

https://doi.org/10.11911/syztjs.2020122