D-2井欠饱和盐水钻井液技术

2011年第38卷第3期探矿1=程(岩土钻掘工程)41S／D一2井欠饱和盐水钻井液技术赵岩，仲玉芳，王卫民，高亮(1．河北省煤田地质局第二地质队，河北邢台054001；2．河北省煤田地质局，河北石家庄050085)摘要：S／D一2井在井深2480nl以后钻遇了大段复杂的盐膏层，由f盐的溶解而造成井径扩大及盐析而结晶造成卡钻。针对七述问题，应用了聚磺欠饱和盐水钻井液体系，解决了钻遇盐膏层后的井壁失稳、钻井液污染等技术问题。详细介绍了该井聚磺欠饱和盐水钻井液的应用技术。关键词：盐膏层；欠饱和盐水；钻井液；石盐升中图分类号：P634．64文献标识码：A文章编号：1672—7428(2011)03—0041—03DrillingFluidTechnologyofUnderSaturatedSaltWaterinWellS／D一2／ZHAOYah，ZHONGYu-fang，WANGWei—rain，GAOLiang(1．No．2Team，HebeiCoalfieldGeologicalBureau，XingtaiHebei054001，China；2．HebeiCoalfieldGeologicalBureau，ShijiazhuangHebei050085，China)Abstract：Rocksaltisaversatilebasicchemicalrawmateria1．OrdosBasinisnotonlyrichinoilandgasresources，andOrdovieianstratumintheeastedgeoftherocksaltisoneofthenlainsaltbasinsalsorichinresources．Withthedevelop—mentofdrillingtechnology，deepandultra—deepdrillingismoreandmoreincomplexformations；thehigherdemandofdrillingfluidperformanceisincreased．ThepaperintroducedthecaseofwellS／D一2：complexsaltgypsumformationwasencounteredwhendrillingtothedepthof2480m，stickinghappen