黏土矿物水化膨胀影响因素分析  

Influence Factor Analysis on Hydration Swelling of Clay Minerals

作　　者：刘光法[1] 苗锡庆[2] 

机构地区：[1]中国石化胜利油田分公司经营管理部,山东东营257000 [2]中国石化川气东送工程建设指挥部,四川达州635000

出　　处：《石油钻探技术》2009年第5期81-84,共4页Petroleum Drilling Techniques

摘　　要：评价了黏土矿物在不同温度、压力和接触液条件下的水化膨胀特征。结果表明：温度超过100℃时，温度对黏土矿物水化膨胀的影响显著，温度低于80℃时，温度对黏土矿物水化膨胀的影响不大；压力对膨润土水化膨胀的影响规律性不强；压力和温度同时作用，对黏土矿物水化膨胀影响比较复杂，影响结果取决于两种因素中哪一种占主导地位；KCI溶液中KCl的质量分数大致为1％～4％时其防膨能力较差，KCl的质量分数为5％时其防膨效果较好；不同类型盐复配后的抑制能力要好于单一的盐，复配二价盐与三价盐的抑制能力无明显差别。Hydration swelling features of clay are evaluated at various temperature, pressure and medi-um fluids. The evaluations indicate that temperature contributes remarkably to clay hydration when it ismore than 100℃, and its effects are small when temperature is less than 80 ℃, the pressure has weak cor-relation with clay hydration. Effects of both pressure and temperature on clay hydration are complicated,and it depends on the principal factor; the swelling resistance is weak when the KCl quality factor ranges1%-4%, and better swelling resistance can be obtained when the quality factor is 5%;the inhibition ofclay mixed with various salt is better than single component salt, there is no remarkable difference between divalent and tervalent salt.

关 键 词：黏土矿物 水化膨胀 温度 压力 矿化度 实验室试验 

分 类 号：TE28[石油与天然气工程—油气井工程]