延长组长7段页岩水基钻井液封堵剂评价研究

doi:10.11885/j.issn.1674-5086.2023.06.21.02

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (5): 173-182.DOI: 10.11885/j.issn.1674-5086.2023.06.21.02

• 石油机械与油田化学 • 上一篇

延长组长₇段页岩水基钻井液封堵剂评价研究

付旻皓^1,2, 王平全¹, 鲁劲松³, 冉超¹, 苏俊霖¹

1. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
2. 西南石油大学新能源与材料学院, 四川成都 610500;
3. 广州海洋地质调查局, 广东广州 510075

收稿日期:2023-06-21 发布日期:2023-10-28
通讯作者: 王平全,E-mail:624739378@qq.com
作者简介:付旻皓,1997年生,男,汉族,山东济南人,硕士,主要从事油气井工作液方面的研究工作。E-mail:18244269192@163.com;王平全,1963年生,男,汉族,重庆人,教授,博士研究生导师,主要从事油气井工作液与储层保护方面的研究工作。E-mail:624739378@qq.com;鲁劲松,1996年生,男,汉族,四川达州人,硕士研究生,主要从事油气井工作液方面的研究工作。E-mail:2834212195@qq.com;冉超,1991年生,男,汉族,新疆乌鲁木齐人,博士研究生,主要从事油气井工作液方面的研究工作。E-mail:201911000089@stu.swpu.edu.cn;苏俊霖,1978年生,男,汉族,四川蓬溪人,副教授,主要从事油气井工作液和油田化学方面的研究工作。E-mail:38207042@qq.com
基金资助:
国家自然科学基金面上项目（51974270）；中国石油-西南石油大学创新联合体科技合作项目（2020CX040201）

Evaluation Study of Shale Water-based Drilling Fluid Plugging Agent in Chang 7 Member of Yanchang Formation

FU Minhao^1,2, WANG Pingquan¹, LU Jinsong³, RAN Chao¹, SU Junlin¹

1. National Key Laboratoray of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. Guangzhou Marine Geological Survey, Guangzhou, Guangdong 510075, China

Received:2023-06-21 Published:2023-10-28

摘要/Abstract

摘要： 针对超低孔超低渗页岩地层的井壁失稳问题，以延长组长₇段页岩为参考对象，采用X射线衍射、渗透率、孔隙度、比表面积、平均孔径测定和扫描电子显微镜等手段，分析了矿物组分、岩性特征，提出了页岩井壁维稳思路。借助模拟“标准厚泥饼”封堵评价方法，对ZD-1、JB53、EP-2和ZD-3等封堵剂最佳加量及其复配的封堵效果进行评价，优选得到了高效封堵的复配封堵剂SPA-1。在延长页岩用水基甲酸钾钻井液体系中加入4.0% SPA-1后，其流变性易于控制且渗透率降低率高达94.20%，作用前后的模拟岩芯电镜图像进一步验证了其封堵效果，并分析了封堵剂封堵作用机理。结果表明，SPA-1集合理的粒度级配和刚柔性粒子协同作用可以实现有效封堵，有利于延长组长₇段页岩井壁稳定。

关键词: 页岩, 水基钻井液, 有效封堵, 微纳米封堵剂, 井壁稳定

Abstract: In view of the problem of well wall instability in ultra-low porosity and ultra-low permeability shale formations, taking the shale of Chang 7 Member of Yanchang Formation as the reference object, the mineral composition and lithology characteristics are analyzed by means of X-ray diffraction, permeability, porosity, specific surface area, average pore diameter measurement and scanning electron microscopy, and the idea of maintaining wellbore stability of shale is put forward. By using the simulated “standard thick mud cake” plugging evaluation method, the optimal dosage of ZD-1, JB53, EP-2 and ZD-3 plugging agents and the plugging effect of their combination were evaluated, and the effective compound plugging agent SPA-1 was selected. After adding 4.0% SPA-1 to the water-base potassium formate drilling fluid system for Yanchang shale, the rheology is easy to control and the permeability reduction rate reaches 94.20%. The simulated core electron microscopy images before and after the application further verified the plugging effect and analyzed the plugging mechanism of the plugging agent. The results show that SPA-1 set reasonable particle size distribution and the synergistic effect of rigid and flexible particles can achieve effective plugging, which is conducive to the stability of shale wall of Chang 7 Member of Yanchang Formation.

Key words: shale, water-based drilling fluid, effective plugging, micro-nano plugging agent, borehole stability

中图分类号:

TE254

付旻皓, 王平全, 鲁劲松, 冉超, 苏俊霖. 延长组长₇段页岩水基钻井液封堵剂评价研究[J]. 西南石油大学学报(自然科学版), 2023, 45(5): 173-182.

FU Minhao, WANG Pingquan, LU Jinsong, RAN Chao, SU Junlin. Evaluation Study of Shale Water-based Drilling Fluid Plugging Agent in Chang 7 Member of Yanchang Formation[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(5): 173-182.

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延长组长₇段页岩水基钻井液封堵剂评价研究

Evaluation Study of Shale Water-based Drilling Fluid Plugging Agent in Chang 7 Member of Yanchang Formation

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