砂岩热储层防损伤完井液体系研究

杨丽丽; 王世博; 张永威; 丁剑; 蒋官澄

doi:10.12358/j.issn.1001-5620.2023.02.016

砂岩热储层防损伤完井液体系研究

doi: 10.12358/j.issn.1001-5620.2023.02.016

中国石油大学(北京)石油工程教育部重点实验室, 北京102249

基金项目: 科技部国家重点研发项目“砂岩热储层采灌增效技术及装备”课题（2019YFB1504201-03）课题1专题3“防损伤钻完井液及添加剂研发”

详细信息

作者简介:
杨丽丽，中国石油大学（北京）副教授，博士生导师，现在主要从事油气层损害与保护、油田化学等方面的教学和研究工作。E-mail：yangll@cup.edu.cn

中图分类号: TE258
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出版历程
- 收稿日期: 2022-12-30
- 修回日期: 2023-02-05
- 录用日期: 2023-01-04
- 刊出日期: 2023-03-30

Damage Preventative Completion Fluid for Sandstone Geothermal Reservoir

Key Laboratory of Petroleum Engineering Ministry of Education, China University of Petroleum (Beijing), Beijing 102249

摘要

摘要: 我国地热资源开发利用正处于快速发展阶段，以中低温的砂岩热储层地热资源开发利用为主。然而在开发地热资源时，由于疏松的砂岩热储层特殊的地质构造，在钻完井的过程中，储层出砂严重同时钻完井液容易进入储层造成敏感性伤害以及钻完井液中固体物质堵塞储层引起储层渗透下降的问题。针对上述问题，本研究引入了关键处理剂仿生固壁剂、隐形酸PF-HTA、缓蚀剂并通过实验进行了加量的优选，最终形成了聚膜隐形酸完井液体系。室内研究表明该完井液体系污染储层岩心后渗透率恢复值大，与钻井液配伍性良好，对储层损伤小，具有良好的储层保护效果。
- 砂岩热储层 /
- 渗透率 /
- 完井液
Abstract: The development and utilization of geothermal resources in China is at a rapid stage of development, with the development and utilization of geothermal resources in sandstone thermal reservoirs of medium and low temperatures as the main. However, during the development of geothermal resources, due to the special geological structure of loose sandstone thermal reservoir, during the drilling and completion process, the reservoir sand production is serious, and the drilling and completion fluid is easy to enter the reservoir to cause sensitivity damage, as well as the problem that the solid substances in the drilling and completion fluid block the reservoir and cause the reservoir permeability to drop. In order to solve the above problems, this study introduced the key treatment agents, such as bionic wall fixative, stealth acid PF-HTA and corrosion inhibitor, and optimized the dosage through experiments. Finally, the polymer film stealth acid completion fluid system was formed. Laboratory research shows that the completion fluid system has a large permeability recovery value after polluting the reservoir core, good compatibility with drilling fluid, little damage to the reservoir, and good reservoir protection effect.
- Sandstone thermal reservoir /
- Permeability /
- Completion fluid

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图 1 隐形酸对岩心粉的溶蚀作用

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图 2 成膜剂的红外光谱图

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图 3 仿生固壁剂JQH的红外光谱图

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图 4 仿生固壁剂不同加量的防膨效果

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图 5 乐陵、兰考地区不同缓蚀剂　　　加量完井液体系腐蚀速率图

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图 6 乐陵地区完井液体系不同缓蚀剂　加量完井液体系钢片腐蚀图

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图 7 兰考地区完井液体系不同缓蚀剂　加量完井液体系钢片腐蚀图

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表 1 完井液配伍性评价实验

浊度/UTN 工作液	混合比例（V/V）			现象
浊度/UTN 工作液	9∶1	5∶5	1∶9	现象
乐陵地区钻井液∶完井液	423	288	156	无沉淀
兰考地区钻井液∶完井液	620	618	389	无沉淀
大名地区钻井液∶完井液	448	315	125	无沉淀
东营地区钻井液∶完井液	453	204	210	无沉淀

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表 2 聚膜隐形酸完井液保护效果

储层岩心地区	长度/cm	直径/cm	T/℃	孔隙度/%	K₀/mD	K_d/mD	K_d/K₀/%
乐陵	9.5	2.5	75	24.88	34.98	36.210	103.82
大名	9.7	2.4	55	9.70	34.58	36.403	105.27
兰考	9.4	2.4	76	45.27	13.34	15.680	117.54
东营	8.5	2.4	60	31.47	159.50	159.980	100.30

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