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新型气制油合成基钻井液是一种以水滴为分散相,气制油为连续相并添加高效乳化剂、润湿剂、亲油胶体等配制而成的乳化钻井液。该钻井液基液黏度低,无多环芳烃,生物降解能力强,能满足环境保护要求。所配成的钻井液塑性黏度小、抑制性好、润滑性强,高温高压滤失量低,形成的泥饼质量好且完井时易被清除,岩心的渗透率恢复值高,储层保护效果好。该钻井液在渤海及印尼油田的应用效果好,在渤海油田的平均机械钻速较常规油基钻井液提高了30%,而在印尼油田的机械钻速则更高。
The new gas-oil synthetic drilling fluid is a kind of emulsified drilling fluid with water droplets as dispersed phase, gas-oil as continuous phase, and adding high-efficient emulsifier, wetting agent and oleophilic colloid. The drilling fluid base fluid viscosity is low, no polycyclic aromatic hydrocarbons, biodegradable ability to meet environmental requirements. The prepared drilling fluid has low plastic viscosity, good inhibition, strong lubricity, low temperature and high pressure filtration loss, good quality of mudcake formed and easy removal during well completion, high recovery value of core permeability, reservoir protection Good effect. The drilling fluid has been applied well in Bohai and Indonesia oilfields. The average ROP in Bohai Oilfield is 30% higher than that of conventional oil-based drilling fluids, while the ROP in Indonesia is even higher.