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埕海三区是近年大港油田储层预测攻关的重点地区。目前埕北低断阶稀井网条件下的深层沙二段三角洲储层预测是规模储量评价升级面临的难点和关键点。本文应用埕海三区大量实际资料,在测井、岩性综合分析的基础上系统开展了基于拟声波的精细波阻抗反演研究,有效拓展了地震频带,纵横向分辨率得到明显的提高,与实钻井吻合度极高,能够反映砂体的展布规律,对后期开发井网部署提供依据。
Three districts in the sea are the key areas for the prediction of the reservoir of Dagang Oilfield in recent years. At present, the prediction of delta reservoir in the second section of Shahejie formation in the lower part of the Sebei fault network is the key and difficult point to evaluate and upgrade the scale reserves. In this paper, a large number of actual data from the three districts of Huanghai Sea are used to study the precise acoustic impedance inversion based on the pseudo-acoustic wave based on well logging and lithology comprehensive analysis. The seismic frequency band is effectively expanded and the vertical and horizontal resolutions are obviously improved. The coincidence degree with actual drilling is very high, which can reflect the distribution law of sandbody and provide the basis for the later wellbore deployment.