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BZ28—1水下沉积扇体的地震反射特征和岩相特征都比较清楚。扇体的前方和上方是连续的反射,扇体项面有超覆现象,扇体内部反射稀少,扇体底界有一组强反射。扇根部位的沉积以砾岩为主,扇体中部为砂岩,扇前缘为砂泥岩互层。钻井证实,此扇体具备良好的生储盖条件。综合多种地震信息可预测此扇体上的含油气聚集部位。在含油气部位上,速度和频率偏低,带宽能量和10Hz 能量百分比升高,碳氢指数有规律的增大。
The seismic reflection characteristics and lithofacies characteristics of BZ28-1 subsea sedimentary bodies are all clear. Sector in front of and above the continuous reflection, the fan over the phenomenon of the item surface, rare internal fan sector, sector bottom sector has a strong reflection. The fan base is mainly composed of conglomerate, the middle part of the fan is sandstone, and the front edge of the fan is interbedded with sand and mudstone. Drilling confirmed that this fan has a good storage and storage conditions. Combining a variety of seismic information can predict the oil-gas accumulation on this sector. At the hydrocarbon-bearing sites, the velocity and frequency are low, the bandwidth energy and the percentage of energy at 10 Hz increase, and the hydrocarbon index increases regularly.