高温高压水基钻井液静态密度研究  

THE DENSITY OF WATER-BASE DRILLING FLUID AT HTHP

作　　者：王贵[1] 蒲晓林[1] 罗兴树[1] 侯勤立[1] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500

出　　处：《西南石油大学学报（自然科学版）》2007年第5期97-99,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：CNPC钻井液重点研究室科研项目

摘　　要：高温高压条件下,水基钻井液的密度不再是一个常数。而过窄的安全泥浆密度窗口是钻高温高压油气井遇到的最大的问题之一。采用高温高压静密度测定装置和常规钻井液性能测定仪器,研究了自来水和低、中、高三种密度水基钻井液的静态密度随温度和压力的变化规律,并回归了其关系式,建立起了钻井液静态密度随温度和压力而变化的数学模型,并对影响高温高压下水基钻井液静态密度变化的因素进行了分析。得出了温度对水基钻井液的密度影响最大,压力对其影响较小的结论。根据实验数据提出了随着温度的升高,压力对钻井液的密度变化影响变大的观点。Under the condition of HT and HP, the density of water-base drilling fluid will not be a constant. Too narrow range of safe fluid density is not the biggest problems in drilling HT and HP well. The apparatus for testing stastic density at HT and HP and the property of conventional drilling fluid are used to research the rule that stastic density of running water, low density , medium density and high density water-base drilling fluid changes as temperature and pressure, and a regression relationship is set up, the mathematic model of the stastic density of drilling fluid change as temperature and pressure established, the factors affecting water-base drilling fluid density under HT and HP analyzed. It is concluded that temperature impacts the water-base drilling fluid density more than pressure does. Based upon the experimental data, pressure impacts the change of drilling fluid density more as temperature increases.

关 键 词：水基钻井液 高温 高压 密度 数学模型 

分 类 号：TE254[石油与天然气工程—油气井工程]