韦兰胶对钻井液流变性能的影响规律  

The Influence of Welan Gum on the Rheology of Drilling Fluids

作　　者：杨振杰[1] 刘阿妮[1] 张喜凤[1] 丁建旭[1] 吴伟[1] 韩波[1] 刘刚[1] 

机构地区：[1]西安石油大学石油工程学院

出　　处：《钻井液与完井液》2009年第3期41-43,共3页Drilling Fluid & Completion Fluid

摘　　要：韦兰胶具有比黄原胶更加优良的抗温性能和剪切稀释性能。研究了韦兰胶在不同条件下(温度、pH、膨润土含量和含盐量)对钻井液流变性能的影响规律,并与黄原胶进行了对比。结果表明,在相同加量条件下,韦兰胶钻井液比黄原胶钻井液具有更高的表观黏度和动切力,而塑性黏度基本一致,具有优良的剪切稀释性能;韦兰胶钻井液的抗温能力明显高于黄原胶钻井液。韦兰胶将成为深井钻井液中的一种新型流型调节剂。The influence of Welan gum on the rheology of drilling fluids is studied in comparison with that of zanthan gum.The study shows that at the same concentration,Welan gum fluid has a higher apparent viscosity and yield point than zanthan gum fluid,while the plastic viscosities of the two fluids are almost equal.It is also noted that the Welan gum fluid has better shear thinning property and higher temperature stability.Welan gum can be used as a new rheology controller in drilling fluids.

关 键 词：钻井液添加剂 韦兰胶 黄原胶 生物胶 流变性 高温 

分 类 号：TE254.4[石油与天然气工程—油气井工程]