耐230℃高温海水钻井液室内实验研究  

Laboratory research on 230℃ high temperature‑resistant seawater‑based drilling fluids

作　　者：邹志飞 熊正强 李晓东 付帆 ZOU Zhifei;XIONG Zhengqiang;LI Xiaodong;FU Fan(Beijing Institute of Exploration Engineering,Beijing 100083,China)

机构地区：[1]北京探矿工程研究所,北京100083

出　　处：《钻探工程》2022年第1期49-56,共8页Drilling Engineering

基　　金：中国地质调查局地质调查项目“深海钻探技术与工程支撑(北京探矿工程研究所)”(编号:DD20190586)。

摘　　要：为了解决深海油气井工程和大洋科学钻探深部高温井段钻井液流变稳定性和护壁性能等变差问题,以复合粘土为造浆材料,通过优选抗温抗盐降滤失剂、防塌剂和高温稳定剂等关键处理剂及钻井液配方优化研究,研发了一套耐230℃高温海水钻井液配方。采用高温高压流变仪、六速旋转粘度计和高温高压滤失仪等仪器,开展耐230℃高温海水钻井液的综合性能评价,如热稳定性、高温流变性等。实验结果显示,密度1.5 g/cm^(3)的钻井液在230℃老化16 h前后,表观粘度变化率为2.5%,高温高压滤失量为23 mL。研究结果表明,该海水钻井液抗温可达230℃,具有良好的抗高温稳定性、高温流变性能以及较低的高温高压滤失量,可满足深海高温硬岩钻探要求。A seawater‑based drilling fluid has been developed through selection of key additives such as fluid loss reducers,high‑temperature stabilizers,and optimization of the components to deal with the problems encountered in deep drilling,such as instability of the borehole wall,unstable rheological properties of drilling fluid,and large fluid loss.The comprehensive performance of the drilling fluid was analyzed,and the results showed that the drilling fluid with density of 1.5g/cm^(3) had an apparent viscosity change rate of 2.5% after aging for 16h at 230℃,and the HPHT filtration loss was 23mL;indicating that the seawater drilling fluid could resist temperature up to 230℃ with good high‑temperature stability,high‑temperature rheological properties and low filtration loss at high‑temperature and high‑pressure,and it can meet the requirements of deep‑sea high‑temperature drilling.

关 键 词：耐高温海水钻井液 高温稳定性 高温流变性 大洋科学钻探 

分 类 号：P634.6[天文地球—地质矿产勘探]