提高油基钻井液在页岩气地层抑制防塌性能的措施

张高波; 高秦陇; 马倩芸

doi:10.3969/j.issn.1001-5620.2019.02.002

提高油基钻井液在页岩气地层抑制防塌性能的措施

doi: 10.3969/j.issn.1001-5620.2019.02.002

1. 长城钻探工程有限公司钻井液公司, 北京 100101;
2. 渤海钻探工程技术研究院, 河北任丘 062552

详细信息

作者简介:
张高波,主要从事钻井技术研究院工作。电话13522051560;E-mail:zhanggb.gwdc@cnpc.com.cn

中图分类号: TE254.3
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出版历程
- 收稿日期: 2018-12-05
- 刊出日期: 2019-04-30

Discussion on the Enhancement of the Inhibitive Capacity of Oil Base Drilling Fluids in Shale Gas Drilling

1. GWDC Drilling Fluid Company, Beijing 100101;
2. Engineering Technology Research Institute, BHDC, Renqiu, Hebei 062552

摘要

摘要: 针对四川页岩气水平井钻井作业中使用油基钻井液不断出现的井下复杂情况，在分析四川威远龙马溪页岩地层特点的基础上，从钻井过程因素、地质因素以及钻井液因素，重点从油基钻井液技术的角度，对如何提高四川页岩气地层油基钻井液抑制防塌能力进行探讨。①研究具有乳化与降滤失作用、提黏度和切力同时具有乳化作用、封堵同时具有降滤失的多功能处理剂，调整好钻井液性能，尽可能降低高温高压滤失量。②采用油水比为85∶15～95∶5的油基钻井液。③使用封堵技术，注意流变性能的变化，主要是黏度、切力和塑性黏度的增加。④油基钻井液内相中的盐使用甲酸钾，或者进一步增加CaCl₂溶液浓度，降低内相溶液的水活度。⑤在甲酸钾或者CaCl₂溶液中加入插层抑制剂，如胺基抑制剂等，提高油基钻井液滤液的抑制能力。
- 油基钻井液 /
- 钻井液技术 /
- 抑制防塌性能 /
- 页岩地层
Abstract: Downhole problems have been frequently encountered in horizontal shale gas drilling with oil base drilling fluids in Sichuan, China. This paper, based on the analyses of the characteristics of the shale in Longmaxi formation in Weiyuan, Sichuan, discusses how to enhance the inhibitive capacity of oil base drilling fluids in shale gas drilling from three aspects:drilling process, geology and drilling fluid, especially oil base drilling fluid. 1) Select and use, through laboratory experiment, multi-function additives to control the properties of the drilling fluid and reduce the HTHP filtration rate as many as possible. The multi-function additives should have these functions such as emulsifying and filtration reducing, increasing viscosity and gel strength while emulsifying the drilling fluid, plugging formation pores while reducing filtration rate. 2) Use oil base drilling fluids with oil/water ratios between 85:15 and 95:5. 3) Use plugging technique and pay attention to the change of rheology, mainly the increase in funnel viscosity, gel strength and yield point, and plastic viscosity. 4) Increase the activity of water phase by using potassium formate in the water phase, or further increasing the concentration of CaCl₂ in the water phase. 5) Use potassium formate or CaCl₂ with inhibitive intercalation agents such as amine, to improve the inhibitive capacity of the filtrates of oil base drilling fluids.
- Oil base drilling fluid /
- Drilling fluid technology /
- Inhibitive and collapse prevention performance /
- Shale formation

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参考文献(21)

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