云阳黄岭岩盐矿ZK0001深孔取心技术

Coring Technology for Deep Hole ZK0001 of Huangling Rock Salt Mine in Yunyang

云阳黄岭矿区ZK0001岩盐探矿井完钻井深3805m,是重庆市地勘局取心垂深最深的一口盐矿井。在钻探取心过程中,选用新川6-5型单动双管取心筒,PDC取心钻头、表镶金刚石取心钻头并严格按照取心规程操作,克服了地层破碎、井径缩径、岩心堵塞、盐析结晶等诸多问题,在3159.85~3805 m井段进行取心,取心进尺254.49m,单筒平均进尺13.39m,平均收获率98.1%,获取盐岩层厚53.11m,取心质量优异,为该区域构造深部盐矿勘探和开采积累了宝贵的经验。

Being the deepest depth of coring salt mine for Chongqing Bureau of Geology and Minerals Exploration,rock salt exploration well ZK0001 is completed with the depth of 3805m in Huangling mining district of Yunyang.In the core drilling process,Xinchuan 6 5 single rotary and double-tube core barrel,PDC coring bit and surface-set diamond bit were selected with strict operation procedures to overcome the difficult problems of formation fracture,well diameter shrinkage,core blocking and salting-out crystallization,the samples were collected in the interval of 3159.85~3805m with coring footage of 254.49m,the average footage for single cylinder was 13.39 meters,the coring recovery quality was excellent,and the average core recovery reached 98.1%,53.11m rock salt in layer thickness was obtained,which could provide valuable experience for the construction of deep salt mine exploration and exploitation in this area.