High Temperature Lubricant for Use in High Density High Salinity Water Base Drilling Fluids
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摘要: 复杂深层油气钻井工程中,超高温高矿化度高密度(简称“三高”)复杂条件对水基钻井液润滑剂性能提出了更高要求。笔者利用环保性能较好的改性基础油、极压耐磨成膜材料、复合表面活性剂以及复合抗氧化剂等,研制了一种高温高矿化度高密度钻井液润滑剂SDR-1。评价结果表明,润滑剂SDR-1抗温达200℃,在饱和盐水基浆及含6000 mg/L钙的饱和盐水基浆中润滑系数降低率均大于80%,其沉降稳定性好,荧光级别小于3级;与高密度钻井液配伍性良好,可有效降低高密度钻井液的循环流动压耗及动态摩阻。Abstract: In deep well drilling, ultra-high temperature, high salinity and high density impose rigorous requirements on the performance of drilling lubricants. A lubricant SDR-1, made from an environmentally friendly modified base oil, an extreme pressure filming agent, a compound surfactant and a compound anti-oxidant, has recently been developed for use in high density high salinity drilling fluids at high temperatures. Evaluation of SDR-1 showed that SDR-1 is able to work effectively at 200 ℃. A saturated salt mud and a saturated salt mud containing 6000 mg/L, when treated with SDR-1, had friction coefficient reduced by 80%. SDR-1 has good sedimentation stability and fluorescence of level 3 or lower. SDR-1 is well compatible with high density drilling fluids, and is able to effectively reduce the flow pressure loss and dynamic friction.
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Key words:
- Drilling lubricant /
- High temperature /
- High density /
- High salinity /
- Flow pressure loss
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