摘要
为解决深井井壁失稳及钻井液流变性不稳定、滤失量大的问题,通过引入无机成膜剂和有机成膜助剂稳定井壁,研发出一套耐240℃高温水基成膜钻井液体系。通过正交实验优选体系配方,利用光学显微镜观察页岩表面成膜,通过页岩热滚回收实验、泥球浸泡测试实验、高温高压滤失测试、粒度分析、扫描电镜等测试对钻井液的页岩表面成膜特性、抑制性、流变性能和滤失量进行了室内研究。结合泥饼微观形貌特征进行理论分析,完成了钻井液性能评价,获得了性能稳定的耐高温成膜钻井液配方。结果表明,在240℃下体系流变性能稳定、动切力合理,滤失量低(240℃老化后API滤失量为5.6 mL,200℃高温高压滤失量为14 mL),泥饼薄韧,成膜性能好,且具有良好的抑制性和封堵能力,有望在深井或高温地热钻探施工中应用。
A water base filming drilling fluid has been developed to deal with problems encountered in deep well drilling,such as borehole wall instability,rheology fluctuation and high filtration rate.The drilling fluid,which is formulated with an inorganic filming agent and an organic filming additive,is resistant to high temperatures to 240℃.The drilling fluid was formulated through orthogonal experiment.The filming performance,inhibitive capacity,rheology and filtration rate etc.of the drilling fluid were studied using optical microscope,hot rolling test,mud ball soaking test,HTHP filtration test,particle size analysis,SEM,as well as the observation of the micro morphology of mud cakes.These studies in turn helped optimize the properties of drilling fluid.The experimental results showed that at 240℃,the drilling fluid had stable rheology,suitable yield point,low filtration rate(API filter loss after aging at 240℃was 5.6 mL,and HTHP filter loss at 200℃was 14 mL),thin mud cake,good filming performance and superior inhibitive capacity and plugging ability,indicating that this drilling fluid will find wide application in deep well drilling and high temperature geothermal well drilling.
作者
李颖
谭现锋
韩炜超
李铠君
郭明义
LI Ying;TAN Xianfeng;HAN Weichao;LI Kaijun;GUO Mingyi(College of Construction Engineering,Jilin University,Changchun,Jilin 130026;Shandong Lu’nan Geology Engineering Investigation Institute,Jining,Shandong 272100)
出处
《钻井液与完井液》
CAS
北大核心
2019年第5期548-554,共7页
Drilling Fluid & Completion Fluid
基金
吉林省省校共建计划专项“深部地热资源(含干热岩)勘查与开发利用”(SXGJSF2017-5)
山东省地矿局地质科技攻关项目“页岩气钻探用高效低阻仿生钻进取样技术研究”(KY201506)
关键词
水基钻井液
耐高温
成膜
流变性
滤失量
性能评价
Water base drilling fluid
Resistant to high temperature
Filming
Rheology
Filter loss
Performance evaluation
