大庆T30井区注水时移地震监测可行性研究

Feasibility study of time-lapse seismicmonitoring of waterflooding in Daqing well-T30 area

1. 大庆石油学院勘探系,黑龙江安达151400;2. 大庆物探公司,黑龙江大庆163357;3. 大庆油田责任有限公司勘探部,黑龙江大庆163453

1. Exploration Department of Daqing Petroleum Institute, Anda 151400, China;2. Daqing Geophysical Exploration Company, Daqing 163357, China;3. Exploration Project DepartmentofDaqing Oilfield Co., Ltd., Daqing 163357, China

迅速发展的油田强化开采时移地震监测技术已被成功地应用于稠油热采监测中,但油田注水时移地震监测,特别是陆相薄互层油藏注水监测的研究却刚刚起步。时移地震能否用于监测注水动态,可行性分析是关键。利用Lumley等人(1997)给出的时移地震监测技术风险定量评价方法,对大庆T30井区葡一组油层注水时移地震监测的可行性进行了初步分析。结果表明,在现有条件下,在大庆油田开展注水时移地震监测工作是比较困难的。至少对T30井区葡一组油层而言,这一结论基本上是可信的。

Time lapse seismicmonitoring in enhanced recovery has achieved a rapid development in recent years, and it has been successfully used inmonitoring thermal recovery of thick oil field. However, time lapse seismicmonitoring of waterflooding, especially the waterfloodmonitoring in thin inter bedded reservoirs of land facies, is still in its infancy. Whether or not time lapse seismicmethod can be used tomonitor waterflood performance, the key is feasibility analysis. For Pu 1 reservoir of well T30 area in Daqing, the feasibility of time lapse seismicmonitoring of waterflooding is analyzed using the Lumley' quantitative assessmentmethod(1997). The results show that it is hard tomonitor waterflood performance by time-lapse seismicmethod in present conditions in Daqing oilfield. It is true at least for the Pu-1 reservoir of well-T30 area of Daqing.