顺北16X井二次侧钻超高温钻井液技术  

Ultra-High Temperature Drilling Fluid Technology for Second Sidetracking of the Well Shunbei-16X

作　　者：于得水 汪露 刘仕银 吴修振 王旭 YU Deishui;WANG Lu;LIU Shiyin;WU Xiuzhen;WANG Xu(Tarim Drilling Company,Zhongyuan Petroleum Engineering Company Limited,SINOPEC,Korla,Xinjiang 841000;Northwest Oilfield Company,SINOPEC,Urumqi,Xinjiang 830000;Research Institute of Drilling Engineering Technology of Zhongyuan Petroleum Engineering Co.,Ltd.,SINOPEC,Puyang,Henan 457001)

机构地区：[1]中原石油工程塔里木分公司,新疆库尔勒841000 [2]中石化西北油田分公司,乌鲁木齐830000 [3]中原石油工程有限公司钻井工程技术研究院,河南濮阳457001

出　　处：《钻井液与完井液》2024年第1期53-59,共7页Drilling Fluid & Completion Fluid

基　　金：中石化石油工程技术服务股份有限公司科技攻关项目“高密度水基钻井液高温稳定技术研究”(SG20-29K)。

摘　　要：顺北16X井是西北油田分公司部署在顺北16号断裂带的一口四开制斜井探井,完钻层位为奥陶系鹰山组,地质预测顺北16X井井底温度为168.9℃/6680 m。该井钻至设计井深6777 m后加深钻进,加深钻进使用ENVIROTHERM NT高性能水基钻井液,卡钻回填后采用油基钻井液进行第一次侧钻,测试未见产,再次回填采用抗高温钻井液体系。第二次侧钻实钻完钻井深7533 m(斜)/7417 m(垂),实测井底温度达209℃,钻井液密度最高为1.75 g/cm^(3),属极高温超高压地层。通过采用抗超高温钻井液体系,保障了超高温下钻井液优良的流变性和沉降稳定性,同时抗CO_(2)、盐水污染能力优良。该井第二次侧钻顺利完钻,钻井液性能稳定,井下正常。The well Shunbei-16X is a well drilled in the#16 fault zone in Shunbei area by Sinopec Northwest Petroleum Bureau.This is a four-interval deviated exploration well drilled to the Yingshan formation of the Ordovician system.The temperature at 6,680 m was predicted to be 168.9℃.After drilling to the designed depth of 6,777 m,decision was made to deepen the well with a high performance drilling fluid ENVIROTHERM NT.The drill pipe got stuck and the well was plugged,then sidetracked with an oil-based drilling fluid.Well test showed no industrial oil production.The well was then re-plugged and sidetracked again with a high temperature drilling fluid.The second sidetracking of the well was done to 7,533 m MD/7,417 m TVD,the bottom hole temperature measured was 209℃,and the maximum mud density was 1.75 g/cm^(3),indicating that the formation at the total depth of the well is an extremely high temperature ultra-high pressure formation.The high performance drilling fluid used to drill the sidetracked section of the well had excellent rheology and settling stability at extremely high formation temperatures as well as excellent resistance to CO_(2) and formation water contamination.The second sidetracking was successful,and no downhole troubles were ever encountered.

关 键 词：超高温 CO_(2)污染 盐水污染 沉降稳定性 

分 类 号：TE254.3[石油与天然气工程—油气井工程]