UAQ海上气田钻井实践  

Drilling practice in UAQ offshore gas field

作　　者：吴玉禄[1] 刘跃俊[1] 

机构地区：[1]中石化石油勘探开发有限公司,北京100031

出　　处：《石油钻采工艺》2011年第6期23-28,共6页Oil Drilling & Production Technology

摘　　要：UAQ海上气田在开发利用3口先导井眼的过程中,面临导管架安装误差及气体泄漏情况下的海底泥面回接、定向钻遇坍塌性页岩层Nahr Umr层、高温高压酸性气藏中的4800 m深钻短半径水平井完井等难题。为此,采用了割除影响严重的导向孔、优选回接工具、套管钻孔后环空注水泥封堵气体泄漏、页岩层定向配套钻井技术以及短半径水平井配套钻井技术和高温高压酸性气藏完井配套技术,3口井成功实施泥面回接,有效控制了气体泄漏,顺利钻穿Nahr Umr页岩层,3口短半径水平井造斜率达28.5(°)/30 m,并安全高效完井取得了平均单井93×104m3/d的高产。对在UAQ气田应用的泥面回接、气体泄漏处理、Nahr Umr页岩钻进、短半径水平井以及酸性气藏的完井技术及实施过程进行了分析与描述,以供类似钻完井作业参考。UAQ offshore gas field was developed on 3 re-entry wells.To overcome the difficulties of mudline tie-back on condition of jacket misalignment,gas leak,the penetration of sloughing shale formation Nahr Umr,drilling short radius horizontal well at the depth of 4800m,and sour gas field completion,some measures were taken,such as cutting harmful guiding holes,tieback tool optimization, annular cement squeezing to block gas leakage,assorted Nahr Umr shale drilling technique,assorted short radius horizontal well drilling technique,and assorted sour gas field completion technique.By the measures above,the three wells was successful in mudline tieback, gas leakage control,and penetrating Nahr Umr shale formation.The three short radius horizontal wells were kicked off by 28.5 degree per 30m,and completed safe and efficiently with high production of 93×104 m3/d per well.

关 键 词：UAQ气田 泥面回接 气体泄漏 页岩坍塌 短半径 完井 

分 类 号：TE243[石油与天然气工程—油气井工程]