CAJ | 학술논문

东部坳陷是北黄海盆地唯一发现油流的沉积坳陷，具有较好的油气勘探前景，其油气藏形成时间将决定该区油气勘探思路和油气勘探方向。通过烃源岩的油气生排烃史和油层的砂岩包裹体研究，综合分析推断了东部坳陷油气藏成藏时间。研究表明，东部坳陷中侏罗统烃源岩的主要生烃期和排烃期为渐新世，下白垩统和上侏罗统砂岩储层包裹体的油充注时间为早中新世。结合盆地构造演化史综合分析推断，北黄海盆地东部坳陷的油气藏形成时间为晚渐新世至早中新世。
동부요함시북황해분지유일발현유류적침적요함，구유교호적유기감탐전경，기유기장형성시간장결정해구유기감탐사로화유기감탐방향。통과경원암적유기생배경사화유층적사암포과체연구，종합분석추단료동부요함유기장성장시간。연구표명，동부요함중주라통경원암적주요생경기화배경기위점신세，하백성통화상주라통사암저층포과체적유충주시간위조중신세。결합분지구조연화사종합분석추단，북황해분지동부요함적유기장형성시간위만점신세지조중신세。
The eastern depression is the only depression in which petroleum was found with good potential in the North Yellow Sea Basin. The time of petroleum accumulation in this depression will decide the strategy of petrole-um exploration. Based on the studies of petroleum generation and expulsion history as well as sandstone inclusions in oil layers, the accumulation time for reservoirs in the eastern depression was discussed. Hydrocarbon was formed and expulsed from the middle Jurassic source rocks in Oligocene, and the sandstone inclusions in the Lower Cretaceous and the Upper Jurassic reservoirs were filled by oil in the early Miocene. Combined with the tectonic evolution of the basin, it was inferred that petroleum accumulated from the Late Oligocene to the Early Miocene in the eastern depression of the North Yellow Sea Basin.