第39参第6期 2017年11月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017)06071306
DOI:10.13639/j-odpt.2017.06.010
Vol. 39 No. 6 Nov.2017
东方1-1气田浅层大位移水平井钻井液优化与实践
田宗强韦龙贵韩成鹿传世王成龙
中海石油(中国)有限公司湛江分公司
引用格式：田宗强，韦龙贵，韩成，鹿传世，王成龙.东方1-1气田浅层大位移水平井钻井液优化与实践[』].石油钻采工艺， 2017,39(6): 713-718
摘要：东方1-1气田在垂深为1350m左右的大位移水平并钻并过程中，表层乐东组、莺歌海组一段地层极易出泥球；水平投储层莺歌海组二段钻进摩阻担矩大，且存在压力衰竭，极易发生井漏；储层逻深浅，地层成岩性差，并壁易失稳。针对以上钻井难题，经过多年摸索与实践，在非储层段改变以往钻井液作业模式，探索性地使用海水聚合物体系，保证非储层段泥岩充分水化；在储层段引入纳米可变形封堵制PF-Greenscal优化无固相钻并液屏茂暂堵性能，同时配合使用成联封堵制PF-LPF及高效润清剂PF-Greenlube，成功解决了泥球、井漏、摩阻担矩大、井壁失稳等难题，形成了一套东方1-1气田浅层大佳移水平井钻井液作业模式。现场3口调整并应用结果表明，非储层段钻进机械钻建由41~64m/h提高到85m/h左右，同时可降低50%钻井液成本；储层段并壁稳定，井径扩大率低于3%，扭矩低，储层保护效果好，3口并测试表皮图数接近0。研究结果可为类仪油气田钻并作业提供钻并液技术参考。
关键词：东方1-1气田；浅层大位移水平井；钻井液；屏蔽暂堵；成膜封堵
中图分类号：TE254
文献标识码：B
Optimization and application of drilling fluid in the shallow extended-reach horizontal
well inDongfang1-1Gasfield
TIAN Zongqiang,WEI Longgui, HAN Cheng, LU Chuanshi,WANG Chenglong CNOOC China Limited Zhanjiang Branch, Zhanjiang 524057, Garangdong, Chind
Citation: TIAN Zongqiang, WEI Longgui, HAN Cheng, LU Chuanshi, WANG Chenglong. Optimization and application of drill-ing fluid in the shallow extended-reach horizontal well in Dongfang 1-1 Gasfield [J J . Oil Drilling & Production Technology, 2017, 39(6): 713-718.
Abstract: When the extended-reach horizontal well with vertical depth of 1 350 m is drilled in Dongfang 1-1 Gasfield, mud balls tend to occur in the surface layer (i.e., Ledong Formation and Yinggehai Formation). During the drilling of the horizontal section in the second Member of Yinggehai Formation, the torque and drag is high and the pressure is depleted, so the mud is lost very easily. Besides, the reservoir is shallow with poor diagenetic property, so the borehole tends to be instable. To deal with these drilling difficulties, a series of exploration and practice have been conducted for many years. The previous operation mode of drilling fluid in non-reservoir intervals is transformed and sea-water polymer system is exploratorily used to ensure the sufficient hydration of mudstone in non-reservoir in-tervals. Nanoscale deformable blocking agent PF-Greenseal is introduced into reservoirs to optimize the shielding-temporary blocking property of solid free drilling fluids, and combined with film blocking agent PF-LPF and efficient lubricant PF-Greenlube, the following drilling difficulties are solved successfully, such as mud ball, circulation loss, high torque and drag and borehole instability, and a set of drilling fluid operation mode for the shallow extended-reach horizontal well in Dongfang 1-1 Gasfield is established. This operation model is applied on site in 3 adjustment wells. It is shown that the rate of penetration (ROP) in non-reservoir intervals increases to 85 m/h
基金项目：国家科技重大专项“南海西部海城低渗油藏勘深开发关键技术"（端号：2016ZX05024-006)。
第一作者：田案强（1975-),2000年毕业于重庆科技学院，莫学士学位，现主要从事海洋油气并钻完并工艺研完应用与管理工作。通试地
址：(524057)广东省湛江市城头22号信猫。电话：0759-3900594。E-mail；tianzq@enooc.com.cn
万方数据