油基钻井液对注水井吸水能力影响的室内评价

Laboratory Evaluation of Injectability in Injecting Water Well by Using the Oil-based Mud

针对现场油基钻井液所钻井出油少、注水困难等问题 ,评价了油基钻井液滤液、完井液、水泥浆、注入水、地层水间的配伍性 ,以及油基钻井液滤液、原油对岩心动静污染后吸水能力的影响。实验结果表明 :油基钻井液滤液与水泥浆、完井液、注入水、地层水存在一定的乳化作用 ;水泥浆与完井液、注入水、地层水不配伍 ,有沉淀生成 ;油基钻井液、原油动静污染后岩心注水能力下降 。

On the basis of the produced oil little while drilling using the oil based mud and the difficult to injected water, this paper evaluates compatibility among the filtrate of drilling fluid,completion fluid, slurry,injected water and formation water and studies the effect of injectability on cores which are pullulated by the filtrate and oil. The results are show that the filtrate of oil based mud has emulsification to above fluids,slurry isn't fit to other fluids, the injectability of cores are decreased while it is pullulated and can be improved by using improving water.