高89-4井区二氧化碳驱波及范围地震预测

Seismic Prediction of Swept Area in Wellblock Gao89-4 with CO_2 Flooding

通过分析胜利油田高89-4井区CO_2驱油前后2期地震资料发现,地震资料在高频段的频谱吸收衰减差异明显。利用该特点提取单频、有效带宽能量及频谱衰减指数等属性,对CO_2驱的波及范围进行了预测。研究结果表明,预测的波及范围与实际结果吻合率达到86.7%。预测结果对高89-4井区的CO_2驱有一定指导作用,相关处理解释一体技术对国内外CO_2驱油地震监测的理论与实践有一定的借鉴作用。

The 2-stage seismic data before and after CO_2 flooding in Wellblock Gao89-4 of Shengli Oilfield show obvious difference in the attenuation of high-frequency spectrum absorption. Based on this difference,the single-frequency,effective bandwidth energy,spectrum attenuation index and other attributes are extracted to predict the swept range of CO_2 flooding. Research shows that the consistency of seismic prediction with field inspection exceeds 85%. This prediction could provide a practical guidance for CO_2 flooding of Wellblock Gao89-4 and the relevant integrated technology of treatment-interpretation could supply certain reference for the seismic prediction theory and practice of CO_2 flooding at home and abroad.