辽河大民屯凹陷页岩油储层强封堵恒流变油基钻井液技术

doi:10.3969/j.issn.1006-6535.2023.04.020

特种油气藏 ›› 2023, Vol. 30 ›› Issue (4): 163-168.DOI: 10.3969/j.issn.1006-6535.2023.04.020

辽河大民屯凹陷页岩油储层强封堵恒流变油基钻井液技术

尹家峰¹, 王晓军², 鲁政权², 步文洋¹, 孙磊³, 景烨琦², 孙云超², 闻丽²

1.中国石油长城钻探工程有限公司钻井一公司,辽宁盘锦 124011;
2.中国石油长城钻探工程有限公司工程技术研究院,辽宁盘锦 124010;
3.中国石油长城钻探工程有限公司钻井二公司,辽宁盘锦 124012

收稿日期:2022-05-21 修回日期:2023-05-07 出版日期:2023-08-25 发布日期:2023-09-18
通讯作者: 王晓军(1984—),男,高级工程师,2008年毕业于济南大学资源环境专业,2011年毕业于中国石油大学(华东)油气井工程专业,获硕士学位,现从事钻井液和防漏堵漏技术等方面的研究工作。本文共同第一作者。
作者简介:尹家峰(1976—),男,高级工程师,1999年毕业于石油大学(华东)石油工程专业,2014年毕业于中国石油大学(华东)油气井工程专业,获硕士学位,现从事钻井工程方面的研究工作。
基金资助:
国家科技重大专项“深井超深井优质钻井液与固井完井技术研究”(2016ZX05020-004);中国石油科学研究与技术开发项目“深井与水平井提速提效技术集成与示范”(2018E-2108)

Technology of Strong Plugging Constant Rheology Oil-Based Drilling Fluid for Shale Oil Reservoir in Damintun Sag of Liaohe Basin

Yin Jiafeng¹, Wang Xiaojun², Lu Zhengquan², Bu Wenyang¹, Sun Lei³, Jing Yeqi², Sun Yunchao², Wen Li²

1. No.1 Drilling Company of CNPC Greatwall Drilling Co., Ltd., Panjin, Liaoning 124011, China;
2. Engineering Technology Research Institute of CNPC Greatwall Drilling Co., Ltd., Panjin, Liaoning 124010, China;
3. No.2 Drilling Company of CNPC Greatwall Drilling Co., Ltd., Panjin, Liaoning 124012, China

Received:2022-05-21 Revised:2023-05-07 Online:2023-08-25 Published:2023-09-18

摘要/Abstract

摘要： 针对辽河油田页岩油储层开发过程中油基钻井液封堵性能不足导致复杂事故频发,低温敏感性强导致循环处理时间长和转运难度大等技术难题,研制了油基交联封堵剂和低温流变性改进剂,形成了一套强封堵恒流变油基钻井液体系,并对该钻井液体系进行了性能评价和实际应用。研究表明:强封堵恒流变油基钻井液密度为1.80~2.40 g/cm³,耐低温达到-25 ℃,耐高温达到220 ℃以上;钻井液具有良好的流变性和沉降稳定性,页岩一次回收率为100.0%,二次回收率为97.5%,对页岩的封堵率达到了60%,可有效减缓压力在页岩内部的传递。现场应用表明:强封堵恒流变油基钻井液体系流变性稳定且易调整,井壁稳定效果好,机械钻速高。该技术可为页岩等复杂地层深井、超深井的高效钻井提供技术参考。

关键词: 油基钻井液, 井壁稳定, 封堵剂, 低温流变性, 页岩油

Abstract: In response to the technical problems such as frequent occurrence of complicated accidents due to insufficient plugging performance of oil-based drilling fluid and long cycle processing time and difficulty in transfer due to strong sensitivity to low temperature in the development of shale oil reservoir in Liaohe Oilfield, an oil-based cross-linked plugging agent and low temperature rheology improving agent were developed to form a set of strong plugging and constant rheology oil-based drilling fluid system, and the performance evaluation and practical application of this drilling fluid system were carried out. The study shows that: The density of strong plugging constant rheology oil-based drilling fluid is 1.80-2.40 g/cm³, and the low temperature resistance reaches -25 ℃ and high temperature resistance reaches over 220 ℃; the drilling fluid has good rheology and settlement stability, the primary recovery rate of shale is 100.0%, the secondary recovery rate is 97.5%, and the plugging rate for shale reaches 60%, which can efficiently slow down the pressure transfer inside the shale. The field application shows that, Strong plugging constant rheology oil-based drilling fluid system has stable rheology and is easy to adjust, with good wellbore stability and high rate of penetrate. This technology can provide a technical reference for efficient drilling of deep and ultra-deep wells in shale and other complex formations.

Key words: oil-based drilling fluid, wellbore stabilization, plugging agent, low-temperature rheology, shale oil

中图分类号:

TE254.3

尹家峰, 王晓军, 鲁政权, 步文洋, 孙磊, 景烨琦, 孙云超, 闻丽. 辽河大民屯凹陷页岩油储层强封堵恒流变油基钻井液技术[J]. 特种油气藏, 2023, 30(4): 163-168.

Yin Jiafeng, Wang Xiaojun, Lu Zhengquan, Bu Wenyang, Sun Lei, Jing Yeqi, Sun Yunchao, Wen Li. Technology of Strong Plugging Constant Rheology Oil-Based Drilling Fluid for Shale Oil Reservoir in Damintun Sag of Liaohe Basin[J]. Special Oil & Gas Reservoirs, 2023, 30(4): 163-168.

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辽河大民屯凹陷页岩油储层强封堵恒流变油基钻井液技术

Technology of Strong Plugging Constant Rheology Oil-Based Drilling Fluid for Shale Oil Reservoir in Damintun Sag of Liaohe Basin

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