2024年5月19日 星期日
抗高温复合盐钻井液体系开发及试验
Development and Testing of High Temperature Resistant Composite Salt Drilling Fluid System
摘要

针对RT1井目的层岩性易水化膨胀、井底温度高且易发生碳酸氢根污染的难题, 通过分析地层特点及钻井液技术难点, 优选有机盐、降滤失剂及封堵剂等关键处理剂, 研制了抗高温复合盐钻井液配方。室内实验结果发现: 该钻井液体系抗温达到180℃, 热滚8d上下密度差仅为0. 06g/cm3, HTHP滤失量小于4mL, 16h膨胀率仅为0. 88%, 二次滚动回收率达92%, 岩心封堵率达75%以上, 抗碳酸氢根污染大于22000mg/L, 具有良好的流变性能、滤失性能、抑制性 能、封堵性能、抗碳酸氢根污染性能及沉降稳定性能。现场实验结果表明: 二开下部及三开井径扩大率仅为3. 8%, 井底170℃下钻井液仍具有良好的流变性, 钻井液中碳酸氢根离子浓度30230mg/L时性能稍有变化, 说明研制的抗高温有机盐钻井液有效地解决了RT1井目的层泥岩易水化膨胀分散、井底温度高及碳酸氢根污染等难题, 在高温深井中具有广阔的应用前景。

Abstract

In response to the difficult problem that the lithology of the target formation of Well RT1 is prone to hydrate and expand, the bottom hole temperature is high, and bicarbonate pollution is prone to occur, by analyzing the formation characteristics and technical difficulties of drilling fluids, and preferentially selecting key treatment agents such as organic salts, filtrate reducers and blocking agents, the formulation of high temperature resistant organic salt drilling fluid is developed. The results of laboratory experiments show that the drilling fluid system is resistant to temperatures up to 180℃, the difference in density between the upper and lower parts is only 0. 06g/cm3 after hot rolling for 8 days, the HTHP filtration loss is less than 4 ml, the 16-hour expansion rate is only 0. 88%, the secondary rolling recovery rate reaches 92%, the core blocking rate is more than 75%, and the resistance to bicarbonate contamination is more than 22000mg/L. It has good rheological properties, filtration properties, inhibition performance, plugging performance, anti-bicarbonate pollution performance and sedimentation stability performance. The results of the field experiment show that the good diameter expansion rate of the lower part of the two-open lower and the three-open lower is only 3. 8%, the drilling fluid still has good rheological properties at 170℃, and the performance varies slightly when the bicarbonate ion concentration in the drilling fluid is 30230mg/L. It indicates that the developed high temperature resistant organic salt drilling fluid has effectively solved the difficult problems of easy hydration, expansion and dispersion of the mudstone in the target layer of well RT1, high temperature at the bottom of the well and bicarbonate contamination, and has broad application prospects in high-temperature deep wells.

DOI10.48014/cpngr.20220428001
文章类型研究性论文
收稿日期2022-04-29
接收日期2022-05-16
出版日期2022-06-28
关键词复合盐钻井液, 高温深井, 碳酸氢根污染, 水化膨胀
KeywordsComposite salt drilling fluid, high temperature deep wells, bicarbonate contamination, hydration expansion
作者钱志伟
AuthorQIAN Zhiwei
所在单位中国石油集团长城钻探工程有限公司工程技术研究院, 盘锦 124010
CompanyResearch Institute of Engineering and Technology, Petro China Great Wall Drilling Co. Ltd. , Panjin 124010, China
浏览量878
下载量275
基金项目国家科技重大专项“深井超深井优质钻井液与固井完井技术研究”(2016ZX05020-004);
中国石油天然气集团公司重点科技攻关项目“深井与水平井提速提效技术集成与示范”(2018E-2018)资助。
参考文献[1]刘仕, 焦冬有. 超深井抗高温水基钻井液体系研究[J]. 石化技术, 2021, 28(11): 79-80.
[2]严德, 张玉山, 宋玲安. 深水高温高压井钻井技术探索与实践[J]. 2021, 41(13): 193-194.
[3]刘畅, 许洁, 冉恒谦. 干热岩抗高温环保水基钻井液体系[J]. 钻井液与完井液, 2021, 38(04): 412-422.
https://doi.org/10.12358/j.issn.1001-5620.2021.04.003
[4]王晓军, 李俊杞, 孙云超, 等. 强抑制水基钻井液在连续管侧钻井中的应用[J]. 石油钻采工艺, 2018, 40(01): 33-39.
https://doi.org/10.13639/j.odpt.2018.01.006
[5]张民立, 庄伟, 徐成金, 等. 抗240℃高密度复合有机盐钻井液在翼探1井的应用[J]. 钻井液与完井液, 2020, 37(04): 431-437.
https://doi.org/10.13639/j.issn.1001-5620.2020.04.005
[6]徐新. 钻井液对钻井速度的影响研究[J]. 中国石油和化工标准与质量, 2021, 41(24): 16-17.
[7]田圆芳, 陶丹阳, 杜文浩, 等. 基于聚合物微球的复合降滤失剂的制备与性能评价[J]. 油田化学, 2020, 37(04): 593-597.
https://doi.org/10.19346/j.cnki.1000-4092.2020.04.005
[8]鄢捷年. 钻井液工艺学[M]. 东营: 石油大学出版社, 2001: 348-360.
[9]罗剑波, 刘仕银, 王颖慧. 浅谈塔河油田钻井液碳酸(氢)根污染的预防与处理[J]. 西部探矿技术, 2017, 29(12): 45-48.
[10]周光正, 王伟忠, 穆剑雷, 等. 钻井液受碳酸根/碳酸氢根污染的探讨[J]. 钻井液与完井液, 2010, 27(06): 42-45.
[11]郭健康, 鄢捷年, 范维旺, 等. KCl/聚合物钻井液的改性及其在苏丹3/7区的应用[J]. 石油钻探技术, 2005, 33(06): 42-45.
[12]张万栋, 李炎军, 孙东征, 等. Weigh系列有机盐钻井液抑制性机理[J]. 石油钻采工艺, 2016, 38(06): 805- 807, 812.
https://doi.org/10.13639/j.odpt.2016.06.018
[13]钱志伟, 鲁政权, 白洪胜, 等. 油基钻井液防漏堵漏技术[J]. 大庆石油地质与开发, 2017, 36(06): 101-104.
https://doi.org/10.19597/j.issn.1000-3754.201610058
[14]石油钻井工程专业标准化委员会. 泥页岩理化性能试验方法: SY/T5613—2000[S]. 北京: 国家石油和化学工业局, 2000.
[15]徐建根. 页岩气地层水基钻井液稳定井壁技术研究[D]. 青岛: 中国石油大学(华东), 2019.
引用本文钱志伟. 抗高温复合盐钻井液体系开发及试验[J]. 中国石油天然气研究, 2022, 1(1): 1-8
CitationQIAN Zhiwei. Development and testing of high temperature resistant composite salt drilling fluid system[J]. Chinese Petroleum and Natural Gas Research, 2022, 1(1): 1-8.