摘要
薄互层状普通稠油油藏杜66块杜家台油层采用蒸汽吞吐开发方式进行开采，目前油汽比已接近经济极限值，操作成本逐年升高，转换开发方式势在必行。利用数值模拟技术对该油藏转烟道气驱的注采参数进行了研究，其合理的注采参数为：段塞大小为0．45PV（对应瞬时含水90％左右），注（气）水速度为120-140t／d，注入水温度为60℃，采注比为1．0-1．1，气液比为1：1，水气交替时间应为30-45d，CO2在烟道气比例中越大越好。经过指标预测，达到经济极限含水率时，预计井组可提高采收率17.12％。
Dujiatai reservoir in Block Du66 is a conventional heavy oil reservoir with thin interbeds,and has been recovered by cyclic steam stimulation.Current SOR is almost approaching economic limit,operation cost is increasing year on year,and development scheme must be converted without delay.Numerical simulation has been conducted for injection and production parameters of converting to flue gas drive,which are: slug size 0.45PV(corresponding instantaneous water cut about 90%),water(gas) injection rate 120～140t/d,injected water temperature 60℃,production factor 1.0～1.1,gas-liquid ratio 1∶1,WAG timing 30～45d,and CO2 proportion is the higher the better.Index prediction indicates that,by the time of reaching economic water cut limit,the recovery factor of the well group can improve 17.12%.
出处
《特种油气藏》
CAS
CSCD
2007年第5期61-64,共4页
Special Oil & Gas Reservoirs
关键词
薄互层稠油油藏
烟道气驱
数值模拟
油藏工程
提高采收率
杜66块
heavy oil reservoir with thin interbed
flue gas drive
numerical simulation
reservoir engineering
EOR
Block Du66
