松南地区深井钻井提速难点与对策  

Difficulties and Applied Technical Strategy in Deep Well Drilling in Songnan Area

作　　者：穆国臣[1] 陈晓峰[1] 王雪[1] 

机构地区：[1]中国石化东北油气分公司工程技术研究院,吉林长春130062

出　　处：《石油钻探技术》2011年第6期19-22,共4页Petroleum Drilling Techniques

摘　　要：松辽盆地南部地区深部地层是中国石化东北油气分公司勘探开发工作的重点,但该地区深层碎屑岩、火山岩地层可钻性差,可钻性级值达到8～10级,平均机械钻速低,单只钻头进尺少,钻井周期长,超过4 000m的深井钻井周期在6个月左右。同时存在碎屑岩地层井壁易失稳、火山岩地层易发生裂逢性漏失、硬夹层较多且部分井段含有砾岩导致断钻具事故频繁、CO2污染钻井液等技术难点。针对这些技术难点,提出了优化井身结构、针对不同地层特点优选钻头、应用旋冲钻井技术等技术对策。现场实践表明,松南地区采取这些技术对策和措施后,提高了钻井速度,缩短了钻井周期,漏失得到控制。Deep reservoir in southern region of Songliao Basin is the main exploration and development target of Northeast Branch of Sinopec,while there are a lot of challenges,such as poor drillability of 8-10 in clastic and volcanic rocks,the low rate of penetration,single bit＇s small drill footage,long drilling cycle of about 6 months for a 4 000 m well.In addition,there also exist other problems,such as,wellbore instability in clastic formations,drilling fluid loss in volcanic formation,drilling tools broken in thin gravel layers,and drilling fluid pollution caused by CO2.In order to solve those problems,a suite of drilling techniques were used,such as casing optimization,drill bit selection for different formations,rotating and percussive drilling techniques.Field applications indicate that those techniques increased drilling speed,reduced drilling cycle and controlled drilling mud loss in Songnan Area.

关 键 词：深井钻井 钻井速度 井身结构 PDC钻头 牙轮钻头 旋冲钻井 松南地区 

分 类 号：TE245[石油与天然气工程—油气井工程]