粘土双液法调剖剂封堵地层大孔道的研究

STUDIES ON CHANNEL PLUGGING IN A RESERVOIR BY USING CLAY AS A PROFILE CONTROL AGENT IN A DOUBLE-FLUID METHOD

示踪剂试验证实了地层大孔道的存在。前人研究并使用过粘土单液法调剖剂封堵地层大孔道，但未研究过粘土双液法调剖剂封堵地层大孔道。本文在这方面进行了工作，主要研究了粘土选用的依据粘土颗粒在岩心中的的进留粒径、粘土双液法调剖剂的配方及其调剖机理等。粘土双液法调剖剂封堵地层大孔道的效果已为胜坨油田和埕东油田的矿场试验所证实。

In has been verified by tracer test that there are channels in some reservoirs.Clay as aprofile control agent in single-fluid method has been studied and used by some foreign engi-neers,but no clay as profile control agent in double-fluid method has been studied so far.This paper deals with this project in which selection of clay,diameter of clay grain for reten-tion in formation,formulation and mechanism of clay as profile control agent in double-fluidmethod are included. The effect of channel plugging by using clay as a profile control agent ina double-fluid method has been confirmed by field testing in Shengtuo Oilfield and Cheng-dong Oilfield.