CAJ | 학술논문

银参4井是中石化在银川地区的第一口参数井，设计井深为4300 m，完钻井深4124.23 m，钻探目的是了解银川盆地地层层序及清水营组烃源岩发育情况。针对该井在钻井过程中存在的上部地层胶结疏松易垮塌、干河沟组在砾石层易憋跳钻、清水营组地层流体侵入污染泥浆、钻遇到大段未预知的盐膏层、清水岩组泥岩存在裂缝导致钻井液漏失等复杂情况，在设计井身结构、优选水力参数时考虑了已经预知的潜在复杂因素，施工时全井大段采用直螺杆加防斜钻具组合大排量轻压吊打，有效防止了憋跳钻，避免了钻具事故，取得了较高的钻井速度，控制了良好的井身质量，探索了适用该区盐膏层段的钻井液体系，并且创造了该区块饱444.5 mm钻头机械钻速最高纪录（39.09 m/h）。
은삼4정시중석화재은천지구적제일구삼수정，설계정심위4300 m，완찬정심4124.23 m，찬탐목적시료해은천분지지층층서급청수영조경원암발육정황。침대해정재찬정과정중존재적상부지층효결소송역과탑、간하구조재력석층역별도찬、청수영조지층류체침입오염니장、찬우도대단미예지적염고층、청수암조니암존재렬봉도치찬정액루실등복잡정황，재설계정신결구、우선수력삼수시고필료이경예지적잠재복잡인소，시공시전정대단채용직라간가방사찬구조합대배량경압조타，유효방지료별도찬，피면료찬구사고，취득료교고적찬정속도，공제료량호적정신질량，탐색료괄용해구염고층단적찬정액체계，병차창조료해구괴포444.5 mm찬두궤계찬속최고기록（39.09 m/h）。
Well Yincan 4 is the first parameter well for Sinopec in Yinchuan District, the purpose of drilling is to investi-gate the stratigraphic sequence of Yinchuan basin and the development of Qingshuiying formation hydrocarbon source rock. According to the complicated conditions in drilling process, such as cementing, loose and collapsing in upper formation, bit bouncing in gravel layer of Ganhegou formation, mud pollution by intrusive fluid in Qingshuiying formation, drilling into a large section of unexpected salt gypsum layer and lost circulation of drilling fluid in mudstone fracture of Qingshuiying for-mation, which were considered in the design of wellbore structure and optimization of hydraulic parameters, straight screw drilling tool and inclining prevention BHA were used with large discharge and light pressure in the large section construction to effectively prevent bit bounce, high drilling speed and good well quality were achieved.The drilling fluid system suitable for the salt gypsum layer in this area is explored and the best ROP record of 39.09m/h is created with-444.5mm bit.