摘要
S/D-2井在井深2480 m以后钻遇了大段复杂的盐膏层,由于盐的溶解而造成井径扩大及盐析而结晶造成卡钻。针对上述问题,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。
Rock salt is a versatile basic chemical raw material.Ordos Basin is not only rich in oil and gas resources,and Ordovician stratum in the east edge of the rock salt is one of the main salt basins also rich in resources.With the development of drilling technology,deep and ultra-deep drilling is more and more in complex formations;the higher demand of drilling fluid performance is increased.The paper introduced the case of well S/D-2： complex salt gypsum formation was encountered when drilling to the depth of 2480m,sticking happened with the enlargement of well diameter caused by salt dissolution and crystallization by salting out.According to these problems,drilling fluid system of polysulfonate under saturated brine was applied,borehole instability in salt gypsum formation,drilling fluid contamination and other technical issues were solved.
出处
《探矿工程（岩土钻掘工程）》
2011年第3期41-43,共3页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
盐膏层
欠饱和盐水
钻井液
石盐井
gypsum bed
under saturated salt water
drilling fluid
rock salt well
