浅层稠油SAGD水平井大直径套管摩阻分析  

Analysis of Major Diameter Casing Drag in Shallow SAGD Horizontal Wells of Heavy Oil

作　　者：杨明合 王朝飞[3] 张文波[3] 汤娟[4] 谭家虎 

机构地区：[1]中国石油集团公司钻井工程重点实验室 [2]长江大学研究室(长江大学),湖北荆州434023 [3]新疆油田公司勘探开发研究院,新疆克拉玛依834000 [4]中成机械制造公司,天津300270 [5]江苏油田分公司石油工程技术研究院,江苏扬州225009

出　　处：《石油天然气学报》2010年第6期106-108,共3页Journal of Oil and Gas Technology

摘　　要：新疆风城稠油SAGD水平井垂深浅、井眼曲率高,为满足后期稠油热采工艺要求,需下244.5mm套管。大尺寸套管弯曲变形后会产生较大摩阻,造成套管下入十分困难。在对实际井眼内套管柱进行受力分析的基础上,依据管柱受迫弯曲理论,用力的平衡及变形条件导出了管柱单元体在井眼中的摩阻计算模型。结果表明,244.5mm套管下入过程中井口加压装置提供10～30kN的压力即可顺利下入指定位置。The SAGD horizontal wells in Xinjiang Oilfield had the features of low vertical depth and high well curvature.In order to meet the requirement of heavy oil thermal recovery,244.5mm casing should be run in.High drag would be caused because of the deformation of larger size casings.Based on the analysis of force applied on casings in wellbore and the theory of casing string bending,the drag computation model based on casing element was established in the light of fore equilibrium and deformation.The computational result indicates that the 10~30kN force generated by wellhead pressure device can assurance the casings successfully running down.

关 键 词：浅层稠油 SAGD 水平井 大直径套管 摩阻 

分 类 号：TE243[石油与天然气工程—油气井工程]