中国松辽—渤海湾盆地油气勘探老区资源潜力分析

Hydrocarbon resource potential of mature fields in the Songliao and Bohai Bay basins

松辽—渤海湾盆地面积为67×104 km2,是中国较早进行油气勘探的两个盆地,油气勘探工作已有50多年的历史,先后发现了200多个油气田,油气资源探明率在51%左右,但是目前待探明油气资源量尚有150×108 t油当量。为此,从近年来油气勘探重大进展、现有油气资源、中—古生界油气资源以及广泛勘探领域等方面,论述了上述两个盆地的油气资源潜力。结论认为:该区油气资源潜力仍较大,还可在中新生界和古生界发现多个大中型油气田,近期仍然是中国石油天然气集团公司增储上产的主力地区。同时还指出了下一步油气勘探的方向:中新生界应向"四新"进军(新地区、新领域、新类型、新深度),积极开拓古生界,加快非常规油气勘探,以期实现新突破。

Hydrocarbon resource exploration started relatively early in the Songliao and Bohai Bay basins with an area of 670 thousand km2.Over the past 5 decades,more than 200 oil and gas fields have been discovered,with about 51% proved hydrocarbon reserves and about 150×108 t oil equivalent of reserves waiting to be proved.Therefore,this paper shows that great potential still exists in these two basins from the aspects of major progress in recent years' hydrocarbon exploration,the current proved reserves,and more hydrocarbon resources to be tapped in the Mesozoic-Paleozoic gas reservoirs,where many middle or large fields will be possibly discovered and more pay zones will be targeted by the PetroChina to enhance its gas reserves and production.Additionally,it points out the future targets of further hydrocarbon resource exploration:(1) the Mesozoic reservoirs should be developed for new pay zones,new fields,new types,and new depths and the Paleozoic reservoirs should be actively explored;(2) new breakthrough should be made in the exploration of more unconventional hydrocarbon resources.