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渤海湾及沿岸盆地面积约20万平方公里,包括河北省,山东省北部和西部、辽宁省南部、河南省北部、天津市和北京市等陆地面积约12万7千平方公里,渤海海域面积为7万多平方公里。陆地面积大部被第四纪冲积层所覆盖。渤海最大深度为70米,平均深度为18米。这是一个大型的第三纪断陷-坳陷沉积盆地,是继大庆油田开发之后,在我国东部地区所开发的另一个重要的含油气盆地(图1)。
Bohai Bay and the coastal basin area of about 200000 square kilometers, including Hebei Province, northern and western Shandong Province, southern Liaoning Province, northern Henan Province, Tianjin and Beijing land area of about 127,000 square kilometers, the Bohai Sea area of More than 70,000 square kilometers. Most of the land area covered by Quaternary alluvium. Bohai Sea maximum depth of 70 meters, the average depth of 18 meters. This is a large-scale Tertiary Depression - Depression Sedimentary Basin. It is another important petroliferous basin developed in eastern China following the development of Daqing Oilfield (Figure 1).