水敏性地层钻探泥浆性能优化及配制

Performance optimization and preparation of drilling mud for water sensitive formation

摘要:

依据河南许昌地热井水敏性地层钻探工程，在分析水敏性地层的成分、水化机理及钻进泥浆性能需求的基础上，确定水敏性地层钻进需要滤失量小、密度低、流变性好、抑制性强的泥浆。依据文献资料及生产实践经验，初步选出配制泥浆的材料和浓度，采用室内试验测定泥浆性能和正交试验极差分析法优选泥浆材料浓度，优化出泥浆最终的配比，经生产实践验证调整，最终确定了适应项目生产需求的泥浆配方。经实际生产检验，满足水敏性地层钻探需求，效果良好。

Abstract:

In reference to geothermal wells in water-sensitive strata in Xuchang city， Henan province， and based on the analysis of the composition， hydration mechanism and drilling mud performance requirements of water-sensitive strata， drilling mud with small filtration， low density， good rheological property and strong inhibition was specified for the water sensitive formation. Based on the literature and field experience， the components and their concentration for mud preparation were preliminarily selected， mud performance was determined by laboratory test， and component concentration was optimized by orthogonal test range analysis with the final mud make-up optimized. With field verification and adjustment， the mud formula suitable for field use was finally determined. field test has proven that it met the drilling requirements of water sensitive strata with good effect.