气制油合成基钻井液流变性能影响评价  

Evaluation on rheological properties of GTL based drilling fluids

作　　者：沈丽[1] 王宝田[1] 宫新军[1] 陈二丁[1] 张海青[1] 王海锋[1] 

机构地区：[1]胜利石油管理局钻井工程技术公司

出　　处：《石油与天然气化工》2013年第1期53-57,共5页Chemical engineering of oil & gas

基　　金：中国石化基金项目"合成基钻井液技术研究"(JP10007)

摘　　要：针对气制油合成基钻井液体系流变性的调控问题,研究了对其流变性影响的因素。实验结果表明:乳化剂应适量,不足或过量都会对体系流变性产生一定影响;有机土、增粘提切剂、油水比和温度是合成基钻井液流变性的主要影响因素。为了获得合适的流变性,一定要控制好有机土的加量,对于未加重体系,有机土加量可适当提高3%～4%(w);而对于加重体系,有机土加量应控制在1.5%～3%(w);随着合成基钻井液中含水量的增加,体系塑性粘度和动切力明显增大。增粘提切剂和温度对合成基钻井液粘切都有很大影响,增粘提切剂的加量应控制在1%以下,高温时可适当加入抗温剂。In view of rheology control problem for gas-to-liquid（GTL） based drilling fluid system,the influence of various factors on the rheological properties was studied.The results showed that the amount of emulsifier employed should be moderate,i.e.,insufficient or excessive quantity will have a certain impact on the rheological properties.Further,organic clay,viscosifier,oil/water ratio and temperature are the main factors affecting the synthetic drilling fluid rheology.The organic clay content of 3%~4% is appropriate to a non-weighting drilling fluid,while 1.5%~3% content is desirable to a weighting drilling fluid.Usually the greater the density is,the smaller the amount of the organic clay is.The plastic viscosity and yield stress of a drilling fluid can be significantly increased with an increase of water content.Viscosifier and temperature have great influences on the viscosity and gels.Viscosifier dosage should be less than 1%,and a proper temperature resistant agent should be added at high temperatures.

关 键 词：气制油合成基钻井液 流变性 塑性粘度 动切力 

分 类 号：TE254[石油与天然气工程—油气井工程]