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东海陆架盆地是我国海域的一个大型中—新生代复合型含油气盆地,中生代盆地是我国海域油气勘探战略接替区之一。2005年之前主要以新生界为目的层,2005年之后,随着地震采集和处理技术的提高以及勘探思路的转变,针对中生界开展了富有成效的调查研究,取得了一系列成果与进展:(1)初步建立了一套深层二维地震采集技术和处理技术;(2)通过海陆对比和地震地层学分析,东海中生界分布广,具有“东海西陆”的古地理格局;(3)中生代盆地具有北东分带结构特征和3期演化;(4)中生界发育2套烃源岩和2套生储盖组合。在此基础上分析了东海陆架中生代盆地油气调查所面临的问题与挑战。
The East China Sea Shelf Basin is a large Meso-Cenozoic composite petroliferous basin in China’s sea area. The Mesozoic Basin is one of the strategic successors to the exploration of oil and gas in China’s oceans. Prior to 2005, mainly for the purpose of the Cenozoic strata, after 2005, with the improvement of seismic acquisition and processing techniques and the change of exploration ideas, a series of achievements and progresses have been made in the field of Mesozoic studies. (1) A set of deep 2D seismic acquisition technology and processing technology has been initially established; (2) Mesozoic distribution of the East China Sea is broad and has the paleogeographic pattern of “East China Sea and West Sea” through sea-land contrast and seismic stratigraphic analysis; ( 3) The Mesozoic basins have the characteristics of the North East zonation and the evolution of the third stage; (4) There are two sets of source rock and two sets of reservoir-cap combination in the Mesozoic. On this basis, the problems and challenges faced by the hydrocarbon exploration in the Mesozoic basins in the East China Sea shelf are analyzed.