Open Access

ARTICLE

Optimization of Anti-Collapse Drilling Fluid Systems with High Potassium Content

Yu Xia¹, Jian Guan⁴, Yong Gao⁵, Shanfa Tang^1,2,3,*, Jialuo Rong¹

1 School of Petroleum Engineering, Yangtze University, Wuhan, 430100, China
2 Key Laboratory of Drilling and Production Engineering for Oil and Gas, Wuhan, 430100, China
3 School of Petroleum Engineering, Yangtze University: National Engineering Research Center for Oil & Gas Drilling and Completion Technology, Wuhan, 430100, China
4 Engineering Technology Research Institute of PetroChina Great Wall Drilling Engineering Co., Ltd., Panjin, 124000, China
5 PetroChina Fushun Petrochemical Branch, Fushun, 113006, China

* Corresponding Author: Shanfa Tang. Email:

Fluid Dynamics & Materials Processing 2023, 19(6), 1609-1622. https://doi.org/10.32604/fdmp.2023.025263

Received 01 July 2022; Accepted 03 September 2022; Issue published 30 January 2023

Abstract

The ash mudstone in some oil formations is highly water-sensitive. The oil formation is fractured, and the risk of well leakage and collapse is not negligible. This study presents a countermeasure for well collapse prevention, based on a “force-chemistry synergistic balance” approach and the utilization of environmentally friendly and efficient hydration inhibitors. The relevance of this approach is demonstrated considering a drilling fluid system with the high potassium content. The analysis shows that the system can maintain good rheological properties, filtration loss and suspension stability even after aging at 130°C for 16 h. The primary roll recovery of rock chips is better than 98%. The secondary rolling recovery rate is 89%. The rapid water loss is close to zero. The effects of carrying rock, sand, hydration inhibition and dispersion of drill chips are all noticeable.

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Keywords

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