对南海北部大陆边缘中生代构造演化及周边区域地质研究表明 ,珠江口盆地东部在中生代时是西藏主特提斯洋 (海 )的东延部分。从地震反射特征、重力场特征、层速度特征、岩石密度特征、坳陷构造形态特征、连井解释以及区域沉积相的研究 ,多个方面阐明了在珠江口盆地东部地区广泛存在中生代海相地层。潮汕坳陷、韩江凹陷作为中生代残留坳陷 ,充填有 3套中生代海相地层。潮汕坳陷可以划分为北部斜坡带、北部凹陷带、中央隆起带和南部凹陷带 4个构造单元 ,划分为四种断裂类型。对周边地区露头、井下资料以及本区地质和地球物理方面的研究结果也表明 ,该区中生界具有较好的生油能力 ,可能存在 3套有效的储盖组合。因而可以预测珠江口盆地中生界海相是一个重要的油气勘探前景区 The study of the Mesozoic tectonic evolution and the geology of the surrounding areas on the northern margin of the South China Sea show that the eastern part of the Pearl River Mouth Basin was the eastern extension of the Tethys Ocean (sea) in Tibet during the Mesozoic. From the aspects of seismic reflection characteristics, gravitational field characteristics, layer velocity characteristics, rock density characteristics, structural features of the depression, well-connected interpretation and regional sedimentary facies, it is elucidated in many aspects that there are widespread Mesozoic marine strata in the eastern Pearl River Mouth Basin . As the Mesozoic residual depression, Chaoshan Depression and Hanjiang Sag are filled with three sets of Mesozoic marine strata. The Chaoshan Depression can be divided into four tectonic units in northern slope belt, northern depression belt, central uplift belt and southern depression belt, which are divided into four types of faults. The outcrop and downhole data in the surrounding area and the geological and geophysical research findings in the area also show that the Mesozoic in this area has good oil generation capacity and there may be three effective reservoir-cap combinations. Therefore, it can be predicted that the Mesozoic marine phase in the Pearl River Mouth Basin is an important oil and gas exploration prospect