高温高密度盐水基钻井液性能  

Performance of high-density brine-based drilling fluid with high-temperature

作　　者：蒋官澄[1] 姚如钢[1] 李威[1] 夏天果[2] 邓田青[3] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249 [2]中国石油塔里木油田分公司,新疆库尔勒841000 [3]中海油田服务股份有限公司油田化学事业部,河北廊坊065201

出　　处：《东北石油大学学报》2014年第2期74-79,9-10,共6页Journal of Northeast Petroleum University

基　　金：国家自然科学基金创新研究群体项目(51221003);国家科技重大专项(2011ZX05021-004)

摘　　要：为解决盐水基钻井液高温高密度条件下性能维护困难的问题,通过系列流变性实验并结合粒度分布和Zeta电位分析等,研究老化温度、密度及黏土含量对钻井液性能的影响.结果表明:老化温度和黏土含量对高密度盐水基钻井液黏土聚结有重要影响,黏土聚结程度随黏土含量增大而增大,聚结的临界温度随膨润土质量分数增大而降低;同时,高密度钻井液的亚微米颗粒体积分数较低密度钻井液的高,高温作用将增加钻井液的亚微米颗粒体积分数;高温和高密度将使钻井液Zeta电位降低,使体系胶体稳定性变差.尽量降低高温高密度钻井液中黏土含量,并配合使用耐温抗盐高效护胶剂是维护其性能稳定性的重要途径.As it is difficult to maintain the drilling fluid performance under conditions of salt water,high temperature and high density,a series of rheological experiments combined with the particle size distribution and Zeta potential analysis were used to clarify the impact of temperature,the concentration of bentonite and density on drilling fluid properties by the authors.The results show that the aging temperature and clay content have important effect on clay coalescence.The degree of clay coalescence increases with the increase of clay content of the base slurry.The critical temperature of coalescence de-creases with the increase of clay content.And sub-micron particle content of high-density drilling fluid higher than that of the low-density drilling fluid.High aging temperature will increase sub-micron particle content.High temperature and high density will make the Zeta potential of drilling fluid to reduce,so that the colloidal stability variation.In order to maintain the performance stability of the high-density drilling fluid,the clay content should be maintained at a low level.The using of efficient colloid protection with heat-resistant and salt resistance is also an important way to maintain its performance stability.

关 键 词：盐水基钻井液 黏土聚结 粒度分布 ZETA电位 胶体稳定性 

分 类 号：TE254.6[石油与天然气工程—油气井工程]