吉木萨尔页岩油区块防漏堵漏技术

Technology for Preventing and Controlling Circulation Loss in the Jimusar Shale Oil Block

周双君 朱立鑫 杨森 毛俊 李萧杰 黄维安

ZHOU Shuangjun ZHU Lixin YANG Sen MAO Jun LI Xiaojie HUANG Weian

中国石油集团西部钻探工程有限公司钻井液分公司，新疆克拉玛依 834000 中国石油大学（华东）理学院，山东青岛 266580 西南石油大学石油与天然气工程学院，四川成都 610500 中国石油大学（华东）石油工程学院，山东青岛 266580

Drilling Fluid Company, CNPC Xibu Drilling Engineering Company Limited, Karamay, Xinjiang, 834000, China College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, China Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan, 610500, China School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China

针对吉木萨尔页岩油区块钻井过程中漏失频发的问题，从地层分布、岩性差异与储层发育特性方面分析了漏失机理，发现该页岩油区块的漏失主要集中在侏罗系八道湾组和二叠系梧桐沟组，浅部漏失地层砂砾岩孔隙发育，胶结疏松，深部漏失地层诱导裂缝发育，所发生漏失分别为渗透性漏失和诱导裂缝漏失。基于吉木萨尔页岩油区块的漏失机理，结合该区块处理漏失的经验，制定了堵漏材料与漏失速度的匹配原则及防漏堵漏技术措施，形成了适用于吉木萨尔页岩油区块的防漏堵漏技术。吉木萨尔页岩油区块应用该技术以后，漏失发生率由38.0%降至19.7%，堵漏成功率提高到了75%。这表明，页岩油区块防漏堵漏技术可以解决吉木萨尔页岩油区块漏失频发的问题，可为该区块的开发提供技术支持。

To address the problem of frequent circulation loss during the drilling of the Jimusaer shale oil block, an analysis of the relevant mechanism was conducted from the perspectives of stratigraphic distribution, lithological differences, and reservoir development characteristics. The circulation loss in this block was mainly concentrated in the Jurassic Badaowan Formation and the Permian Wutonggou Formation. The pores were developed in the glutenite of the unconsolidated shallow loss formation, while the induced fractures occurred in the deep loss formation. The circulation loss can be classified into the permeable type and the induced fracture type. Depending on circulation loss mechanism and the experience of dealing with it in the Jimusaer shale oil block, the matching principle between plugging materials and the circulation loss rate was formulated, and prevention and control countermeasures were proposed. As a result, the technology to prevent and control circulation loss was developed for the Jimusaer shale oil block. It reduced the incidence of circulation loss from 38.00% to 19.70% and enhanced the success rate of plugging to 75% in the block. This indicates that the proposed technology is effective for tackling the problem of frequent circulation loss in the Jimusaer shale oil block, and can provide technical support for the development of this block.

国家科技重大专项“致密油气开发环境保护技术集成及关键装备”（编号：2016ZX05040-005）的部分研究内容

https://doi.org/10.11911/syztjs.2021034