准噶尔盆地南缘山前构造高难度深井钻井工艺技术  

DRILLING TECHNOLOGY FOR DEEP WELLS WITH GREAT DIFFICULTY IN PIEDMONT STRUCTURE AT SOUTHERN EDGE OF ZHUNGEER BASIN

作　　者：曾武强 郑基? 冯才立 胡锡辉[1] 

机构地区：[1]四川石油管理局川南矿区

出　　处：《天然气工业》2000年第1期44-47,共4页Natural Gas Industry

摘　　要：新疆准噶尔盆地南缘地区属山前推覆挤压构造，地质情况十分复杂，地应力强，地层倾角大，孔隙压力高，大段为易水化、易分散的不稳定地层，钻井技术难度极大，尤其是安集海河组地层几乎成了该地区钻井史上难以逾越的障碍。１９９８ 年先后在该地区钻探成功的安６ 井和吐谷１ 井是该区块上首次突破安集海河组的两口深井。文章简要叙述了安６ 井和吐谷１ 井的钻井过程，并针对该区钻井工艺技术方面的难题，着重介绍了合理井身结构的选择、高陡构造井眼轨迹的控制、对付强地应力、强水敏、易分散、易缩径和高孔隙压力地层条件下稳定井壁的钻井液技术和防塌、防卡技术，以及长裸眼、多压力系统溢流、井漏情况下的平衡钻井、防漏、堵漏技术及固井技术，并对完善该地区的钻井工艺技术提出了一些建议。The southern edge area of Zhungeer basin in Xinjiang is a piedmont nappe compression structure.The geological condition of this area is very complex:strong ground stress,great formation dip,high pore pressure and easy to hydrate and easy to disperse formation.The drilling difficulty is extremely great,especially,the Haihe formation in Anji becomes almost an insurmountable barrier in the history of well drilling in this area.The wells An 6 and Tugu 1 which have been successfully drilled successively in this area in 1998 are the first two wells drilled through Haihe formation in this block.In this paper,the process of wells An 6 and Tugu 1 is briefly narrated,and,in view of the difficult problems in drilling technology in this area,the selection of rational casing program,the control of hole trajectory in high and steep structure,the drilling fluid technique which can stabilize borehole wall under the condition that the formation is of strong ground stress,high water sensibility and high pore pressure,and is easy to disperse and the hole diameter is easy to be reduced,as well as anti sloughing and anti sticking technique,and the lost circulation preventing plugging technique and the well cementing technique for balanced drilling under the condition of long uncased hole,multi pressure system effusion and lost circulation are emphatically presented,and some proposals for perfecting the drilling technology in this area are offered.

关 键 词：深井 井身结构 井眼轨迷 井眼稳定 钻井 

分 类 号：TE245[石油与天然气工程—油气井工程] TE21