青海五龙沟矿区破碎地层钻探技术探究

An Investigation of Drilling Technique Used for Fractured Stratum in Wulonggou Mining Area,Qinghai

基于青海五龙沟矿区破碎地层钻探过程中,因地层微裂隙发育、泥岩地层吸水膨胀性强,极易引发钻孔坍塌、缩孔问题,影响岩芯采取率,从而对矿体赋存规模、矿区经济效益评估造成影响。通过改进钻探工艺,研发一套适用于破碎地层的钻探冲洗基液,为五龙沟矿区破碎地层的钻探工作提供便利。

During the drilling process in the fractured strata of the Wulonggou Mining Area in Qinghai,the development of microfractures and strong water-absorption expansion of the mudstone stratum often leads to borehole collapse and shrinkage problems.These issues affect the rock core recovery rate,subsequently impacting the assessment of the ore body scale and economic benefit of the mining area.By improving drilling techniques and developing a set of drilling flush fluids suitable.for fractured strata,this study aims to facilitate the drilling work in the fractured strata of the Wulonggou Mining Area.