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Development and Performance Evaluation of a Deep Water synthetic based drilling fluid System

Open Journal of Yangtze Oil and Gas 2020年第4期5卷 165-175页

作者： Zengwei Chen Yongxue Lin Ninghui Dou Chao Xiao Hua’an Zhou Yu Deng Yuqiao Zhou Song Wang Dichen Tan Huaiyuan Long State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing China Sinopec Research Institute of Petroleum Engineering Beijing China drilling fluid Technical Service Company of Chuanqing drilling Engineering Co.. Ltd. Cheng du China Yangtze University Jingzhou China

With the enhancement of environmental protection awareness, the requirements on drilling fluid are increasingly strict, and the use of ordinary oil-based drilling fluid has been strictly restricted. In order to solve the environmental protection and oil-gas reservoir protection problems of offshore oil drilling, a new synthetic basic drilling fluid system is developed. The basic formula is as follows: a basic fluid (80% Linear a-olefin + 20% Simulated seawater) + 2.5% nano organobentonite + 3.5% emulsifier RHJ-5# + 2.5% fluid loss agent SDJ-1 + 1.5% CaO + the right amount of oil wetting barite to adjust the density, and a multifunctional oil and gas formation protective agent YRZ has been developed. The performance was evaluated using a high-low-high-temperature rheometer, a high-temperature and high-pressure demulsification voltage tester, and a high-temperature and high-pressure dynamic fluid loss meter. The results show that the developed synthetic based drilling fluid has good rheological property, demulsification voltage ≥ 500 V, temperature resistance up to 160°C, high temperature and high pressure filtration loss synthetic based drilling fluid, the permeability recovery value exceeds 90% and the reservoir protection effect is excellent. The new synthetic deepwater drilling fluid is expected to have a good application prospect in offshore deepwater drilling.

关键词： Deep Water drilling synthetic based drilling fluid Rheological Property Emulsion Stability Filtration Agent of Reservoir Protection

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