CAJ | 학술논문

元坝长兴组气藏储量巨大,为增大储量控制面积,提高单井产量,在四川盆地川东北巴中低缓构造部署了一口水平开发评价井元坝103H 井,设计井深7841 m.通过优化钻井工艺,在下沙溪庙至须家河组地层应用液体欠平衡钻井技术、水平段综合采用旋转导向、抗高温钻井液体系、防磨接头和减磨剂双效防磨等先进技术,克服了陆相深部地层硬度高、钻速慢、井底温度高、水平段井眼清洁难度大、起下钻摩阻扭矩大、钻具托压现象严重等多种技术难题.该井完钻井深7729.8 m,水平段长682.8 m,最大垂深6761.52 m,四开在井深6608 m 处一次性侧钻成功.该井的成功实施,为元坝超深水平井钻井积累了宝贵的经验,为同类井的钻井施工提供了重要参考.
원패장흥조기장저량거대,위증대저량공제면적,제고단정산량,재사천분지천동북파중저완구조부서료일구수평개발평개정원패103H 정,설계정심7841 m.통과우화찬정공예,재하사계묘지수가하조지층응용액체흠평형찬정기술、수평단종합채용선전도향、항고온찬정액체계、방마접두화감마제쌍효방마등선진기술,극복료륙상심부지층경도고、찬속만、정저온도고、수평단정안청길난도대、기하찬마조뉴구대、찬구탁압현상엄중등다충기술난제.해정완찬정심7729.8 m,수평단장682.8 m,최대수심6761.52 m,사개재정심6608 m 처일차성측찬성공.해정적성공실시,위원패초심수평정찬정적루료보귀적경험,위동류정적찬정시공제공료중요삼고.
Yuanba gas field is rich in natural gas while the main formation is buried deeper than 7000m. In order to enlarge the reserve control area and improve production rate of single well, Well YB103H was drilled in Yuanba area of northeast Sichuan. By ap-plying underbalanced drilling technology in Shaximiao to Xujiahe zones, rotary steerable drilling, temperature resistant drilling fluid system, double friction reduction technology, etc., the major technical challenges were overcomed, such as hard formations, low rate of penetration, high temperature, difficult hole cleaning in horizontal section, high tripping friction, and adding weight on bit. The total depth is 7 729.8 m in Permian Period Changxing Section, with lateral section length of 682.8 m, and vertical depth of 6 761.52 m, which makes it the deepest well in China. The success of Well Yuanba103H accumulates valuable experiences for ultra-deep horizontal drilling. The key drilling technologies are illustrated in detail.which provides important references to wells of the same type.