有机硅钻井液CO_2污染及处理室内实验  

The Experiment of CO_2 Pollution and Treating in Silicate-based Drilling Fluids

作　　者：孙玉学[1] 王桂全[1] 王瑛琪[2] 

机构地区：[1]大庆石油学院,大庆163318 [2]胜利石油管理局孤岛采油厂,东营257300

出　　处：《科学技术与工程》2010年第10期2442-2444,2449,共4页Science Technology and Engineering

摘　　要：CO2侵入钻井液后的模拟实验表明,CO2侵入有机硅钻井液后会使钻井液颜色变暗,粘度和切力急剧增大,流变性变差,增大了HCO3-和CO32-的浓度,降低OH-的浓度,即降低了钻井液的pH值。当污染严重时已不能使用,从而不能满足正常钻井的要求,所以必须及时除去。经过室内实验,优选了KOH和CaO胶液配方体系,具有很好的预防和处理CO2污染的能力。Through simulation experiment of CO2 invading into drilling fluid that viscosity and yield point are increased dramatically and drilling fluid is in a bad rheology.The concentration of HCO-3 and CO2-3 both are increased,the concentration of OH-and pH value of drilling fluid both are reduced.It does not meet the drilling requirement as the concentration of CO2 is too high,so we must eliminate it as soon as possible.The glue soluting with KOH and CaO through some Lab experiments have optimized,which has a better performance for prevention and management of CO2 pollution.

关 键 词：钻井液 CO2 污染 流变性 

分 类 号：TE254[石油与天然气工程—油气井工程]