摘要
凤凰X1井是1口风险探井,在实钻过程中出现地层岩性不确定、中古生界地层可钻性差、研磨性强;311.1 mm大井眼轨迹控制难;煤层、碳质泥岩易垮塌掉块;漏层多等技术难点。通过分析实钻地层特点和地层可钻性,优选高效PDC和牙轮钻头,增加单弯双稳钻具中两扶正器间的距离,采用随钻堵漏、承压堵漏及新型爆炸堵漏等方法进行堵漏,提高钻井液密度、抑制和防塌封堵能力,减少井下煤层和碳质泥岩的垮塌掉块,并结合中古生界地层安全钻井技术,实现了凤凰X1井顺利施工。该井的成功实施,为同类井的钻完井施工提供借鉴。
Well Fenghuang-X1 is a risk exploratory well in Fuyang exploratory area.In the drilling process,some problems weremet,such as stratum uncertainty,poor drillability and grindability of Middle Paleozoic strata,uncontrollable trajectory of big size wellborewith diameter of 311.1 mm,coal mudstone collapse,mass leaking layers,etc.Based on the analyses on the strata characteristics anddrillability,the efficient PDC bit and roller bit were selected.For the reasons of uncertainty of deflecting capacity and uncontrollable welltrack using normal BHA in big size wellbore and hard strata,the new single bending bistable BHA which increased the distance betweentwo centralizers was taken into usage.The methods of plugging while drilling,pressure sealing and novel explosive plugging were takenas plugging methods.The treatments above were taken to raise mud density,and to enhance mud inhibition capacity and anti-collapsingand sealing capacity.The application of the drilling technique on Well Fenghuang-X1 was successful,and offered some experience fordrilling similar type of wells.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2013年第4期30-34,共5页
Oil Drilling & Production Technology
基金
江苏石油勘探局科研项目"江苏油田阜阳探区凤凰X1井钻井技术研究"(编号:JS12053)
关键词
凤凰X1井
中古生界
火成岩
钻头优选
轨迹控制
垮塌
Well Fenghuang-X1
mesozoic-paleozoic
igneous rock
bit selection
trajectory control
sloughing
