黄海南部勿南沙隆起上古生界和中下三叠统含油气远景探讨

A Discussion on the Prospects of Hydrocarbons in Upper Paleozoic and Middle-Lower Triassic in Wunansha Uplift in the South of Yellow Sea

黄海南部勿南沙隆起位于下扬子地台东延入海部分,古生界和中下三叠统厚4～6km,大部地区缺失中侏罗统—白垩系,上第三系直接覆盖其上;下二叠统栖霞组灰岩和上二叠统龙潭组煤系为烃源岩,与中下三叠统青龙组灰岩构成了良好的生储盖组合;内幕构造圈闭35个,总面积624.7km^2。这是一个值得重视的找油气新领域。

The Wunansha Uplift in the south of Yellow Sea is situated in the part of lower Yangzi Platform east extending to the sea. The thickness of Paleozoic and Middle-Lower Triassic is 4～6km. Middle Jarassic-Cretaceous were absent in most areas and Upper Tertiary directly covered them. The Qixia Formation Limestone of Lower Permian and the Longtan Formation Coal-series of Upper Permian are the source rocks and form a good source-reservoir-caprock association with Qinglong Formation Lime-stone of Lower Triassic. There are 35 structural traps under the Tertiary unconformity in this region and the total area of them is up to 624.7km^2. This is a new field worthy to pay more attention to sur-vey oil and gas.