KCl/聚合醇协同防塌作用机理研究  

The inhibition mechanism of the cooperative KCl/Polyglycol

作　　者：邱正松[1] 韩祝国[1] 徐加放[1] 于连香[1] 张红星[1] 

机构地区：[1]中国石油大学(华东)石油工程学院

出　　处：《钻井液与完井液》2006年第2期1-3,共3页Drilling Fluid & Completion Fluid

基　　金："塔河油田‘多元协同’井壁稳定新技术研究与应用"(编号XYK2003-11)的部分内容

摘　　要：借助Zeta/sizer3000胶体电位粒度仪、Novasina水活度仪以及Texas-500界面张力仪,研究了氯化钾与强抑制性聚合醇CXC-1协同作用对钻井液ζ电位、水活度以及油/水界面张力的影响规律,并结合传统的吸附、分散等防塌实验方法,探讨了氯化钾与CXC-1的协同防塌作用机理。研究表明,CXC-1具有降低页岩负电性、降低钻井液水活度和油/水界面张力的特性;与KCl复配时,CXC-1浊点降低,在粘土颗粒上的吸附量增加,页岩负电性和钻井液水活度进一步降低,同时仍然保持较低的油/水界面张力,协同防塌效果显著。This paper argues the inhibition mechanism of the KCl and the strongly inhibitive Polyglycol CXC-1,with the influence study of the potential,activity and oil-water interfacial tension,mainly using the Zeta/sizer3000 colloid granularity/potential instrument,Novasina activity instrument and Texas-500 interfacial tension instrument.The study indicates that the CXC-1 has the properties of reducing the ξ potential of shale,the activity of drilling fluid and the interfacial tense of oil-water.When used together with KCl,the cloud point of CXC-1 decreased,the adsorption of CXC-1 in the clay grains increased,the ξ potential of shale and the activity of drilling fluid decreased,besides,the oil-water interfacial tense remained in lower level,which displayed remarkable cooperative inhibitive property.

关 键 词：聚合醇 井眼稳定 KCl机理 协同作用 

分 类 号：TE254.4[石油与天然气工程—油气井工程]