东海陆架盆地南部中生界分布特征与油气勘探前景

在充分利用前人对东海陆架盆地中生代油气勘探成果的基础上,对最新处理的地震剖面和重磁反演剖面进行了精细解释和综合研究，结合海陆中生界对比结果认为:东海陆架盆地南部中生界分布广、厚度大，平均厚度可达6 000 m，而且具有“东厚西薄、南厚北薄”的特征。侏罗系主要分布在闽江和基隆凹陷，厚度分布稳定，w(TOC)平均值>1.0%;而白垩系在整个陆架盆地南部均有分布，具有向基隆凹陷加厚的趋势，w(TOC)平均值<1.0%。东海陆架盆地南部的基隆凹陷是下一步油气资源战略选区的首选目标，而台北低凸起很可能具有良好的油气远景。

Hydrocarbon Prospecting of Mesozoic Strata in Southern East China Sea Shelf Basin

In order to understand deeply the distribution of Mesozoic strata in the southern of East China Sea shelf basin, the processed seismic profiles newly have been interpreted. Combined with the gravity and magnet inversion and the Mesozoic strata correlations between the onshore and offshore, we think that the Mesozoic strata are characterized by extensive distribution and large thickness of over 6 000 m, and ‘thick in the east and thin in the west’ and ‘thick in the south and thin in the north’. The Jurassic strata mainly deposited in Minjiang sag and Jilong sag, which have extensive distribution, stable thickness and high total content of organic carbon for the Mesozoic strata. The Cretaceous strata almost cover the whole southern of East China Sea shelf basin, which show a increasing trend in thickness toward the Jilong sag and low total content of organic carbon . It is inferred that the Jilong sag could be a target with good hydrocarbon potential for Jurassic strata, while Taibei low uplift could also be a hydrocarbon prospecting area.