英深1井钻井液技术  

Drilling Fluid Technology in Well Yingshen-1

作　　者：王书琪[1] 张彬[2] 吕志强[3] 卢虎[2] 张欢庆[3] 何涛[3] 刘毅[3] 

机构地区：[1]塔里木油田分公司 [2]塔里木油田勘探事业部 [3]新疆塔里木油田建设工程有限责任公司

出　　处：《钻井液与完井液》2006年第6期24-28,83,共6页Drilling Fluid & Completion Fluid

摘　　要：英深1井位于塔里木盆地西南坳陷齐姆根凸起英吉沙构造,是1口五开超深预探井直井,完钻井深为7258m。该井钻遇大段巨厚泥岩、膏泥岩、盐膏层,地层倾角大,裂缝发育,高压盐水层发育,钻井过程中遇到了很多困难。研究出了高密度抗盐膏钻井液配方及维护处理方案,并针对五开后钻井液密度高、压力高和温度高的问题,研制出了高密度磺化有机盐抗高温钻井液,同时,对四开固井中水泥浆发生闪凝,造成井漏、盐水溢流的问题,配出了密度为2.60和2.80g/cm3的压井液,成功地压住了盐水层。现场应用表明,高密度抗盐膏钻井液成功地克服了巨厚盐膏层、高压盐水层等难点;高密度磺化有机盐抗高温钻井液抑制性好,具有较低的粘度、切力和高温高压滤失量,在220℃,138MPa下仍有良好的流变性,满足了深井段钻井的需要;密度高达2.80g/cm3的压井液具有良好的流变性,成功地解决了高密度压井的技术难题。Well Yingshen-1 is located in the Ying-Ji-Sha Structure of the Southwestern sag in Tarim Basin. It is an ultra-deep, 5-interval, vertical exploration well with a drilled depth of 7258 m. The formations penetrated by this well include massive mudstone, mudstone with imbedded gypsum, gypsum and salt. Some formations are highly angled, and some are fracture-developed. Moreover, high pressure saltwater zones are not seldom encountered.A high density sulfonate polymer mud was developed to for the salt/gypsum for...

关 键 词：高密度钻井液 高温钻井液 抗盐膏 抑制性 井眼稳定 超深井钻井 英深1井 

分 类 号：TE254[石油与天然气工程—油气井工程]