CO_2吞吐效果分析及参数优选  

An Analysis of Effects of Cyclic CO_2 Injection and Parameter Selection

作　　者：周正平[1] 钱卫明[1] 余峰[1] 郎春艳[1] 

机构地区：[1]江苏油田分公司试采工程公司,江苏泰州552300

出　　处：《河南石油》2003年第1期52-54,共3页Henan Petroleum

摘　　要：江苏油田油气试采公司在苏北溱潼凹陷复杂小断块油田已进行 13井次CO2 吞吐现场施工 ,共注入CO2 量 5 75 5t,增产原油 3 3 90t(不含 2 0 0 2年 )。针对实施效果差异较大及试验中存在的问题 ,分别对高含水、低渗低效和稠油三类油藏运用数理统计分析的方法 ,优选出增产原油量与注入量、关井时间和返排等试验参数的关系 ,分析了影响CO2 吞吐效果的各项因素。对于小断块油藏 ,CO2 吞吐采油投资少 ,见效快 。Field cyclic CO 2 injection operation has been implemented in 13 wells/times in a complex small fault-block reservoir in Qintong depression, Jiangsu oilfield. Totally 5,755t CO 2 have been injected leading to an incremental oil production of 3,390t (excluding production in 2002). Production enhancement effects, however, vary greatly in different wells. Mathematical statistics and analysis are carried out in three different types of reservoirs including high water-cut reservoirs, low permeability low efficiency reservoirs and heavy oil reservoirs. The relationship between incremental oil production and experimental parameters such as rate of injection, shut-in time and flowback is established and the factors that influence the effects of cyclic CO 2 injection are analyzed. Cyclic CO 2 injection has the advantages of small investment needed and taking effects quickly and is suitable for use in small fault-block reservoirs.

关 键 词：油气开采 复杂小断块油藏 CO2吞吐试验 效果 参数优选 

分 类 号：TE357.42[石油与天然气工程—油气田开发工程]