茨34块CO_2驱参数优化与方案设计  

PARAMETER OPTIMIZATION AND RECOVERY SCHEME OF CARBON DIOXIDE FLOODING IN CI-34

作　　者：付美龙[1] 叶成[1] 熊帆[1] 丁振武[2] 

机构地区：[1]长江大学石油工程学院 [2]辽河油田曙光工程技术处

出　　处：《钻采工艺》2011年第1期56-58,116,共3页Drilling & Production Technology

摘　　要：茨34块在目前注水开发的过程中存在的着油水流度比大,油层压力下降快,油层能量低,地层亏空严重等一系列问题。为了进一步提高茨34块的开发效果,进行了普通稠油注CO2驱数值模拟研究,优化了注入周期、注入压力、注入气水比、油井排液量等参数,预测了最佳开采方案。数值模拟研究表明,保持现有注采井网进行注水开发,到2011年茨34块累积产油量为308961t;茨34块注气方式为气—水交替注入,注气周期为60 d,单井注入量为目前注水量的2.0倍,气水比为1.0:2.0,油井排液量为目前日产液的1.0倍时,开采效果最佳;在现场注气试验中注气量选用1200 t时最好。In waterflooding process, it have some problems such as high oil-water mobility ratio, fast reservoir pressure falling, low reservoir energy, severe voided container rock, etc. in Ci-34. In order to further enhance the development effect, the numerical simulation research of carbon dioxide flooding heavy oil was carried out. Through the method, the injection cycle, injection pressure, gas/water ratio, and oil well lifting rate, etc. were optimized, and the exploitation plan was forecasted. Eventually, the conclusion demonstrated: untill 2011, keeping'availability flooding network', cumulative oil recovery is 308961t in Ci-34; in mining process, gas injection scheme is gas-water alternating injection; the best parameter is that, gas injection cycle is 60d, individual well injection rate is twice as much as present water injection, gas/water ratio is 1.0:2.0, oil well fluid delivery is the same large as present daily fluid production rate; the best amount of gas injection is 1200t in steaming field experiment.

关 键 词：CO2驱 稠油 数值模拟 参数优化 开采方案 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]