台兴油田CO_2驱细分开发提高采收率技术研究  

EOR research of CO_2 flooding and layering technology in Taixing Oilfield

作　　者：赵梓平[1] 张宁波[1] 朱宏绶[1] 汪金如[1] 

机构地区：[1]中国石化华东油气分公司泰州采油厂,江苏泰州225300

出　　处：《复杂油气藏》2016年第2期48-53,共6页Complex Hydrocarbon Reservoirs

基　　金：华东油气分公司2014年科研项目苏北油田提高采收率关键技术研究(HDF/KJ2013-08)资助

摘　　要：台兴油田QK-111断块阜三段油藏为中-低渗复杂断块油藏,经过15 a水驱开发整体进入高含水递减开发阶段,注气前油藏综合含水74%,采出程度仅14.7%,处于低效开发状态。为恢复断块产量、提高油藏原油采收率,实施CO2驱现场试验,研究形成了高含水油藏剩余油微差异刻画技术、CO2驱油机理认识、注采参数优化方法以及CO_2驱细分开发技术,已应用于4个注气井组,累计注入CO2气4.17×10^4t,油藏日产油水平由9 t提高到28 t,综合含水由78%下降到44%,累积增油11 183 t,预计方案全面实施后,原油采收率将提高9.6%,年增油量超过1.3×10^4t。Fault block of QK- 111 reservoir with medium- low permeability is located in Taixing Oilfield,whose oil-bearing formations are the third formation of Funing. It has been in the inefficient decreasing development state after 15 years of water flooding,with composite water cut 74% and recovery degree of only 14. 7%. CO_2 flooding field tests were implemented in order to enhance reservoir oil recovery. Many technologies were applied to this project,which include the study the distribution of remaining oil in high water- cut reservoir,optimization methods of injection and production parameters,CO_2 flooding mechanism study and layering Technology of CO_2 flooding technology. The amount of CO_2 injection is 4. 17 × 10~4 tons in four gas injector group,oil production per day increased from 9 tons per day to 28 tons per day,composite water cut from 78% to 44%,cumulative oil production have increased by 11 183 tons. When the plan is carried out completely,oil recovery will increase by 9. 6%,and the amount of oil production will increase more than 1. 3 × 10~4 tons every year.

关 键 词：二氧化碳 混相-近混相驱 细分开发 高含水油藏 采收率 台兴油田 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]