深水条件下气制油合成基钻井液流变性和流变模式研究  

Study on rheological property and model of GTL based drilling fluids under deepwater condition

作　　者：李怀科[1] 王楠[1] 田荣剑[1] 李自立[1] 严海源[2] 

机构地区：[1]中海油田服务股份有限公司油田化学事业部技术发展中心 [2]中海油田服务股份有限公司油田化学事业部深圳基地

出　　处：《中国海上油气》2010年第6期406-408,共3页China Offshore Oil and Gas

基　　金：国家重大专项"深水油气田开发钻完井液及固井工程配套技术研究"(编号:2008ZX05026-001-04)部分研究内容

摘　　要：深水钻井条件下钻井液面临低温高压问题。通过室内实验研究了深水条件下气制油合成基钻井液的流变性和流变模式。实验结果表明:低温条件下,高剪切速率时剪切应力随着压力的升高而升高,低剪切速率时剪切应力受压力的影响不大;表观粘度、塑性粘度随着压力的升高而增大,随着温度的升高而减小;动切力受温度和压力的影响较小,有利于井下压力控制。流变曲线拟合结果表明,宾汉、卡森、赫谢尔-巴尔克莱(H-B)等3种流变模式均能较好地表征深水条件下气制油合成基钻井液的流变性,但卡森模式和H-B模式计算复杂,因此在精度要求范围内,建议采用宾汉模式进行水力学计算。In deepwater drilling,the challenges of drilling fluids faced are lower temperature and high pressure.Rheological property and model of GTL based drilling fluid are studied in Laboratory.The experimental results showed that in lower temperature,the shear stress increased with the increase of pressure at high shear rate,while the pressure had little influence on shear stress at lower shear rate;the apparent viscosity and plastic viscosity increased with the increase of pressure and decreased with the increase of temperature;temperature and pressure had little effects on yield point,which be propitious to control down hole pressure.Rheological curve regressed results showed that Bingham model,Casson model and H-B model can greatly characterize rheological property of GTL based drilling fluids under deepwater condition.But,Bingham model is also recommended for hydraulics calculation due to complicated calculation of Casson model and H-B model.

关 键 词：深水 低温高压 气制油合成基钻井液 流变模式 流变性 

分 类 号：TE254[石油与天然气工程—油气井工程]