渤海湾盆地深层油气资源潜力分析与认识

An approach to the hydrocarbon resource potential of Bohai Bay basin

采用SL3DBS盆地模拟法与圈闭累加法,以深层和区带评价为重点,再次对渤海湾盆地21个第三系凹陷进行油气资源评价,结合古生界评价结果,汇总的渤海湾盆地总资源量（深层资源量占其 35％）约为235×108t油气当量;剩余资源量约为150×108t油气当量,主要分布在富油气凹陷中勘探程度较低的第三系深层、滩海和古生界等勘探领域。陆上的富油气凹陷剩余资源量均大于4×108t,仍然是今后滚动挖潜的主要区域;滩海地区是寻找大中型油气田的有利勘探领域。优选出18个凹陷为渤海湾盆地陆上和滩海有利勘探区,复杂隐蔽型油气藏是今后勘探的主体。图3表4参5（王孝陵摘）

By using SL3DBS (a system of numerical basin simulation) and the method of accumulating plays and stressing evaluation of deep-seated beds and plays, the hydrocarbon resource of 21 Tertiary sags of Bohai Bay basin was reevaluated. Combining the result of Tertiary and that of Palaeozoic, it is obtained that the total hydrocarbon resource of the basin, 35 percent of which is situated in the deep-seated beds, amounts to about 235 × 108t oil equivalent and the residual hydrocarbon resource amounts to about 150 × 108 t oil equivalent. In the basin, residual hydrocarbon resource is chiefly situated in those domains such as the deep-seated beds of the Tertiary of rich hydrocarbon sags, the shallow sea and the Palaeozoic, which are less explored. Thus, the rich hydrocarbon sags of the land, where residual hydrocarbon resource potential exceeds 4 × 108t oil equivalent, are main areas of progressive exploration for the future; the shallow sea is a favourable exploration area where large-medium sized fields will probably be found. Of the basin, 18 sags have been picked out as favourable exploration areas of the land and the shallow sea; in the future exploration, complex and subtle types of reservoirs will be principal domains.