泡沫钻井液粘度与温度压力关系特性研究  

Viscosity-temperature and viscosity-pressure relation characteristics of foam drilling fluid.

作　　者：耿宏章[1] 蒋莉 任旭明[3] 

机构地区：[1]石油大学(华东)物理科学与技术学院 [2]胜利石油钻井泥浆公司 [3]胜利油田胜兴干式变压器有限责任公司

出　　处：《钻井液与完井液》2004年第4期18-20,共3页Drilling Fluid & Completion Fluid

摘　　要：泡沫钻井液的粘度是欠平衡钻井设计中应考虑的主要因素之一。介绍了一种测定泡沫钻井液粘度与压力、温度关系的方法 ,测定并分析了泡沫钻井液粘度与压力、温度的关系。通过实验研究表明 ,泡沫钻井液的粘度随压力的升高先降低后增大 ,大约在压力为 5～ 10MPa时达到最小值 ;随温度的升高先增大后减小 ,粘度极大值出现的温度范围基本在 5 0～ 70℃之间。从气液表面能和分子间能量变化的角度分析了温度、压力影响泡沫钻井液粘度的原因 ,在低压低温下 ,表面能是影响钻井液粘度的主要因素 ;而在高温高压下 。Viscosity of a foam drilling fluid is a main factor should be considered in underbalanced drilling design. A method to measure viscosity-temperature and viscosity-pressure relation characteristics of foam drilling fluid was introduced and measurements were made. A series of tests show that the viscosity of foam drilling fluid deceases at first with the pressure increasing, then it incr eases, and at about 5～10MPa, it reaches a minimal value; but with the increasing of temperature, it climbs up and then declines,the maximum viscosity appearing at a point within 50～70 ℃. From the standpoint of gas-liquid interface energy and energy exchange between molecules, the influence of temperature and pressure on viscosity of foam drilling fluid was analyzed, that is, under low temperature low pressure condition, the interfacial en-ergy has effect on drilling fluid's viscosity, whereas under high temperature high pressure condition, energy between molecules tends to play an important role.

关 键 词：泡沫钻井液 粘度 温度 压力 钻井设计 测量方法 

分 类 号：TE254.1[石油与天然气工程—油气井工程]