作　　者： ; ; ; ;

机构地区： 长江大学石油工程学院

出　　处： 《钻采工艺》 2014年第2期23-25,116,共3页

摘　　要： 准噶尔盆地南缘地区发育山前冲断带,属山前高陡构造。该地区预探储层埋藏深度大,最大埋藏深度达到7 400 m。常规的井身结构在南缘地区超深及复杂地质条件的影响下存在诸多问题,如不能完全封堵不同压力层系、无法安全钻达深部目的层,非常规井身结构有效地解决了这些难题。针对南缘地质特点,考虑非常规井身结构的优势,DF1井采用套管程序:508 mm×365.1 mm×273.1 mm×206.4 mm×139.7 mm的五开非常规井身结构,同时四开井段进行定向造斜。分析了DF1井非常规井身结构应用中遇到的工程问题,同时对DF1井非常规井身结构的使用效果进行了总结分析。总结认为,DF1井采用非常规井身结构一定程度上克服了复杂地质条件,实现不同压力层系的分隔封堵,获得了较高的机械钻速;该井在加深过程中出现严重复杂,主要原因是套管破损;DF1为新疆油田超深井非常规井身结构的设计与应用提供了宝贵经验。 The southern margin area of the Zhungaer basin belongs to the high and steep piedmont structure.The maximum exploration reservoir depth of this region is high up to 7400m.Conventional well bore structure can' t meet the requirement of drilling under the deep and complex geological conditions in the southern margin area,such as being unable to completely seal strata with different pressures and incapable of drilling to the deep target zone safely,but unconventional well bore structure can effectively solve these problems.Taking well DF1 as example,considering the advantages of unconventional well bore structure and the geological characteristics of the southern margin area,the casing program of well DF1 was designed as φ508 mm×φ365.1 mm ×φ365.1 mm ×φ206.4 mm × φ139.7 mm,meanwhile the directional building angle was done in φ241.3mm hole section.The problems existent in unconventional hole structure in well DF1 were analyzed,and the application effects showed that the unconventional hole structure could separate and plug formations with different pressures and improve ROP..

关 键 词： 准噶尔盆地 井身结构 非常规 超深井

领　　域： [石油与天然气工程]