钻井液与完井液2012，Vol.29Issue(3)：78-80,3.
缝洞型碳酸盐岩储层漏失模型及控制对策
Lost Circulation Models and Mud Loss Control Measures in Fractured and Cavernous Carbonate Reservoirs
摘要
Abstract
Geological engineering situation is complicated in fractured and cavernous carbonate reservoirs, which has high risk of lost circulation. For example, in No.12 block of Tahe oilfield, each of the lost circulation and traveling empty happens in 47% and 30% wells of total 95 wells. Lost circulation model and mud loss control measures depend on the shape and combination mode of loss channels, and the fracture-cavity-fracture-cavity (closed), fracture-cavity-fracture-cavity (open), cavity-fracture-cavity mud loss models are established. The analyzing results show that mud loss control, whether easy or not, depends on the size of cavities and the distance to the borehole, and the most effective measures of sealing is to seal the narrowest section of loss channels. The researches show that the difficulties of loss control in fractured and cavernous reservoirs lies in that the size, location and shape of loss channels can not be forecasted accurately, and the key to control mud loss is sealing fractures as fast as possible. Aiming at different types of fractured and cavernous reservoirs lost circulations, corresponding mud loss control measures are developed separately.关键词
缝洞型储层/溶洞/漏失通道/漏失模型/控制对策Key words
Fractured and cavernous reservoirs/ Cavity/ Loss channel/ Lost circulation model/ Mud loss control measures分类
能源科技引用本文复制引用
闫丰明,康毅力,孙凯,杜春朝..缝洞型碳酸盐岩储层漏失模型及控制对策[J].钻井液与完井液,2012,29(3):78-80,3.基金项目
973计划课题"深井复杂储层漏失与井壁失稳机理及预测"(2010CB226705),国家科技重大专项:复杂地层漏失诊断及完井方法研究(2011ZX05005-006-008HZ)、碳酸盐岩缝洞型储层保护技术配套(2008ZX05049-03-07HZ) （2010CB226705）
