Deep fractured tight gas reservoirs have attracted more and more attention worldwide, which also promotes the large‐scale application of oil‐based drilling fluids. Due to its poor permeability, deep tight gas reservoirs need to pay more attention to the issue of reservoir protection. However, previous studies have shown that reservoir damage of oil‐based drilling fluid is small, and limited damage studies mainly focus on one aspect of work, and there is not a systematic reservoir protection method of oil‐based drilling fluid for tight gas reservoir. Based on the particularity of fractured tight gas reservoir protection, the thesis clarifies the fracture factors that affect the reservoir protection efficiency and the preferred factors of reservoir protection materials. Considering fully the characteristics of fracture and oil‐based drilling fluid, the design basis and overall design idea of reservoir protection method of oil‐based drilling fluid are established. Considering the four conditions of fracture determination and method selection, difference of Engineering requirements, particle selection, fracture plugging, and plugging removal mechanism, the reservoir protection technology of oil‐based drilling fluid is constructed, and the simulation experiments of reservoir protection technology of oil‐based drilling fluid for fractured tight gas reservoir were carried out; the results provided a reference for reservoir protection of oil‐based drilling fluid.

中文翻译：

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深层致密气藏油基钻井液的地层保护方法

深裂缝致密气藏在全世界引起越来越多的关注，这也促进了油基钻井液的大规模应用。由于深层致密气藏的渗透性差，需要更加重视储层保护问题。但是，先前的研究表明，油基钻井液的储层损害很小，有限的损害研究主要集中在工作的一个方面，而且对于致密气藏，还没有系统的油基钻井液储层保护方法。结合致密气藏裂缝保护的特殊性，阐明影响储层保护效率的裂缝因素和储层保护材料的优选因素。充分考虑裂缝和油基钻井液的特性，建立了油基钻井液储层保护方法的设计依据和总体设计思路。综合考虑裂缝确定和方法选择的四个条件，工程要求的差异，颗粒的选择，裂缝的堵塞和堵漏的去除机理，构建了油基钻井液的储层保护技术，并进行了油藏保护技术的模拟实验。进行了致密气藏裂缝的钻井液；研究结果为油基钻井液的储层保护提供了参考。建立颗粒选择，压裂堵漏，除堵机理，构造油基钻井液储层保护技术，并进行了裂缝性致密气藏油基钻井液储层保护技术的模拟实验。研究结果为油基钻井液的储层保护提供了参考。建立颗粒选择，压裂堵漏，除堵机理，构造油基钻井液储层保护技术，并进行了裂缝性致密气藏油基钻井液储层保护技术的模拟实验。研究结果为油基钻井液的储层保护提供了参考。