钻井液流变模式的探讨

PROBE INTO RHEOLOGICAL MODELS OF DRILLING FLUID

介绍了几种钻井液流变模式及其流变参数,宾汉模式已被证明不适合大多数钻井液,幂律模式不能反映钻井液具有静切应力的特性,卡森模式、赫谢尔-巴尔克莱模式和罗伯特逊-斯蒂夫模式应用范围较广;介绍了优选钻井液流变模式的几种数学分析方法,其中回归分析方法和最小二乘法准确度较高,应用较为广泛;探讨了钻井液流变模式现场应用中存在的问题,对钻井液流变模式现场应用的发展趋势做了展望。

Some rheological models and their rheological parameters of drilling fluid are introduced in the paper,and Binham Model has been proved unfit most drilling fluids.Power Law Model couldn’t reflect the gel strength of drilling fluid,and Casson Model,Herschel-Bulkely Model and Robertson-Stiff Model have wider range of application.Some kinds of mathematical analysis methods to select rheological model of drilling fluid are explained here,among them the regression analysis method and least square method have higher accuracy,and have more extensive application.The problems that exist in the field application of rheological model of drilling fluid are discussed and,development tendency of the field application of rheological model of drilling fluid in prospect is put forward in the end.