东海陆架盆地中生界地质特征与油气资源潜力浅析

我国海域地质调查和油气勘探表明 ,在陆架海域都不同程度地发育着中生代盆地 ,它们主要属于构造残留型和断陷型盆地 ,中生代盆地虽然石油地质条件复杂 ,找油找气的难度较大 ,但大多具有一定的油气勘探潜力。其中东海陆架盆地油气勘探和研究表明 ,其除了新生界古近系为重点勘探目的层之外 ,中生界也为不可放弃的油气勘探新领域。文章通过对近几年来东海油气勘探有关中生界资料的总结研究 ,较系统地阐述了东海陆架盆地中西部地区中生代盆地的地质结构、构造格局、地层分布和岩相特征 ,进行了油气地质条件初步分析评价 ,指出盆地南部的福州凹陷存在着中下侏罗统含油气系统 ,其油气资源规模中等偏小 ,一般以形成中 -小型油气田为主 ,具备一定勘探价值

Analysis of Mesozoic Geological Characteristics and Resource Potential in the East China Sea Shelf Basin

Geologic investigation and petroleum exploration in our sea area indicate that various Mesozoic basins developed in shelf area are mainly structure-remain basin and faulted basin styles, and show definite petroleum exploration potential in Mesozoic basins,although petroleum geologic conditions are so complicated and more technical difficulties will be there. After some explorations and research works, East China Sea shelf basin shows Paleogene as an important explorating target, and besides, Mesozoic basin is also a indefeasible exploration field. On the base of the analysis of recently collected Mesozoic data, this paper describes basic geologic features of Mesozoic basin in the midwest shelf basin of East China Sea including geologic textures, structure types, strata distributions and facies charateristics and essential appraisement of petroleum geologic conditions indicates that Fuzhou depression located at the southern basin have developed mid-lower Jurassic petroleum system and middle-sized resources scale, which are commonly forecasted to form middle-small fileds and show definite explorating values.