断陷盆地大面积三维叠前时间偏移连片处理的地质意义及关键技术

中国东部陆相断陷盆地含油气构造带已经基本完成了三维地震勘探工作。为了能够按现代层序地层学理论重新认识和评价这些断陷盆地，开展断陷盆地大面积三维叠前时间偏移是一项必然的选择。本文以南堡凹陷为例，重点对叠前时间偏移连片处理的可行性及关键技术进行了分析。通过南堡凹陷取得的处理效果表明，在陆相断陷盆地实施大面积三维地震资料叠前时间偏移连片处理，对于深化地质认识、挖掘老区潜力、突破新区勘探、实现油田的可持续发展具有重要意义。

Geologic meaning and key techniques of 3-D large-area multiple-block-jointed prestack time migration processing in fault basin

3-D seismic exploration has been basically finished in oil/gas-bearing structural belts of China eastern continental fault basins. In order to renew knowledge and appreciation of these fault basins according to current sequence-stratigraphic theory, the 3-D large-area prestack time migration processing in fault basin is a necessary choice. Taking the Nanpu sag as an example,the paper highlights the analysis of the feasibility of multiple-block-jointed prestack time migration processing and its key techniques. It is shown by achieved processing results in Nanpu sag that carrying out the 3-D large-area multiple-block-jointed prestack time migration processing in continental fault basin has important meaning for deepening geologic knowledge,digging the potential in depleted fields, achieving new breakthrough in new exploration areas and fulfillment of sustainable development of oilfield.