水锁效应研究  

Study on the water block effect

作　　者：贺承祖[1] 华明琪[1] 

机构地区：[1]成都理工学院应化系

出　　处：《钻井液与完井液》1996年第6期13-15,共3页Drilling Fluid & Completion Fluid

摘　　要：应用热力学和动力学理论分析了引起水锁效应的原因,介绍了水锁效应的危害及其抑制方法。外来流体的界面张力σ和接触角θ对热力学和动力学水锁效应均有影响,σ越大或θ越小,水锁效应就越大。而地层岩石孔喉半径、地层压力、外来流体侵入深度和粘度仅影响动力学水锁效应,对于致密、低压储层,并在外来流体侵入较深和粘度较高时,将产生较强的动力学水锁效应。指出仅试图通过降低外来流体的界面张力来降低水锁效应的不足之处。The reason of water block is analysed by thermodynamics and dynamics method. It is shown that the interfacial tension and contact angle for drilling fluid additive are the main influence factors, some other accessory factors are discussed. The inhi-bition measure are presented according to the differ ent damage characteristic in different formation.

关 键 词：油层损害预防 水锁效应 防止 地层损害 

分 类 号：TE258[石油与天然气工程—油气井工程]