二次采油与三次采油结合技术在胜坨油田坨11南的应用  

Pilot Trial of Combination Technique of Secondary and Tertiary Oil Recoveries at Fault Block Tuo-11S of Shengtuo Oil Field

作　　者：刘建军[1] 姜春艳[1] 肖坤[1] 张孝天[1] 解用芝[1] 

机构地区：[1]中石化胜利油田公司胜利采油厂,山东东营257051

出　　处：《油田化学》2002年第1期59-62,共4页Oilfield Chemistry

摘　　要：二次采油和三次采油结合技术 (简称“2 +3”提高采收率技术 )是指在充分调剖的基础上进行有限度的三次采油。介绍了该技术在胜坨油田索 11南的先导试验情况。以铬冻胶和水玻璃 氯化钙为调剖剂 ,对试验区北部的注水井进行了四轮次的充分调剖 ;随后注入牺牲剂段塞、驱油剂段塞和流度控制段塞 ,恢复注水驱油。调剖和驱油阶段 ,试验区相关指标明显改善。通过对试验区的采油曲线和水驱曲线的分析 ,截止到 2 0 0 1年 11月底 ,试验区累计增油 5 493.0t,预计最终采收率将提高 7.1%。提出了试验区目前存在的问题及下一步的工作构想。The combination technique of secondary and tertiary oil recovery, referred as '2+3' technique for improved oil recovery in China for simplicity and convenience, covers full control of injectivity profile of water injection wells in an aimed area (as a measure in secondary recovery) and injection of flooding chemicals (tertiary recovery) in limited, approriate volume. The pilot trial of this technique performed at fault block Tuo-11S of Shengtuo, Shengli, and its results are described. An HPAM/Cr(Ⅲ) and a water glass/CaCl 2 gelling fluids as plugging agents are used for profile control. The injectivity profile of the water injection wells in north of the pilot area are fully modified by the one or another plugging agent in four-step operations to meet the requirments needed for chemical flood to be performed (PI and FD values). The chemical flood involves injection of a sacrifice, an oil displacement (surfactant solution of two sulfonates), and a mobility control plugs and followed by successive water injection. As a result of the pilot trial, the performance of injection and production wells at the pilot area is notably improved. According to production and water flood curves, oil production increases by 5493 tons by the end of sempt, 2001 and the ultimate enhancement in oil recovery of 7.1% will be expected. The problems encountered and the measures to be taken afterwords are presented.

关 键 词：调剖 化学驱油 二次采油 三次采油 提高原油采收率 矿场试验 胜利胜坨油田 

分 类 号：TE357[石油与天然气工程—油气田开发工程]