摘要
针对青海盐溶地层在钻进过程中,上部泥页岩吸水膨胀,钻孔缩径,下部钾盐矿物层溶蚀,导致盐侵、扩径以及砂砾碎屑岩层胶结差,松散易坍塌、掉块等施工难点,开展了卤水泥浆的适岩性研究。在实验室选用正交实验法和现场实际配制,优选了4组卤水泥浆配方,通过生产应用与使用普通低固相泥浆对比,平均机械钻速由1.015 m/h提高至1.195 m/h,孔径扩大率由7.83%降低至4.36%,划眼损失率由3.05%降低至1.41%,泥浆成本由731.3元/m^3降低至503.8元/m^3,取得了较好的效果。
In the drilling process in salt soluble formation of Qinghai, the upper shale water swelling with borehole shrink- age, the lower potasium salt mineral layer corrosion lead salt intrusion and borehole diameter expanding ; gravel clastic rock with poor cementation, collapsing and block falling, according to these construction difficulties, the study was carried out on the brine mud adaptability to lithology. By orthogonal experiment method in the laboratory and practical preparation in the field, 4 groups of brine mud formulas were optimized. Compared with the ordinary low solid mud in the application, the average penetration rate increased from 1. 015m/h to 1. 195m/h, borehole diameter expansion rate decreased from 7.83% to 4. 36% , hole backreaming loss decreased from 3.05% to 1.41% , the mud cost decreased from 751.3 yuan/m3 to 503.8 yuan/m3.
出处
《探矿工程（岩土钻掘工程）》
2017年第6期41-44,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
盐溶地层
钻探
卤水泥浆
正交实验
salt soluble formation
drilling
brine mud
orthogonal experiment
