影响钻井液pH值的因素研究  

The Factors Influencing the pH Value of Drilling Fluids

作　　者：孙明波[1] 高晓辉[1] 潘越[1] 郑召焱[1] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555

出　　处：《海洋石油》2013年第3期86-89,共4页Offshore Oil

摘　　要：研究了钻井液各种组分对体系pH值的影响,结果表明:在淡水体系中,氯化钠、石膏、铁矿粉使体系的初始pH值下降,而重晶石对体系pH值没有影响;有机盐使淡水体系和饱和盐水体系的初始pH值上升,在饱和盐水体系中表现一定的缓冲作用;表面活性剂使淡水体系和饱和盐水体系的初始pH值上升;HPAM、CMC、XC使淡水体系和饱和盐水体系的初始pH值上升;在淡水体系和饱和盐水体系中,SMP-Ⅱ有显著的缓冲作用,其原因是SMP-Ⅲ分子上的酚羟基与酚钠构成缓冲体系。The factors influencing the pH of drilling fluid have been studied. The study results indicate that for fresh water systems, with the increase of the addition ofNaC1, CaS04 and iron ore powder, the initial pH value decreased, but the pH value was not influ- enced by the addition of barite. Organic salt could increase the pH of fresh water and saturated salt water systems, and played as a buffer in saturated salt water systems. The additions of surfactant, HPAM, CMC and XC increased the pH value of both fresh water and saturated salt water systems. A strong buffering effect was observed for SMP-Ⅱ in fresh water and saturated salt water systems, because phenolic hydroxyl and sodium phenolate react as a buffer pair.

关 键 词：PH值 钻井液组分 淡水体系 饱和盐水 缓冲 

分 类 号：TE254[石油与天然气工程—油气井工程]