下扬子区海相中、古生界地质结构分区及其油气勘探选区意义

基于对下扬子区海相中、古生界构造及沉积沉降特征的研究,以影响和反映构造稳定及晚期生烃的基底性质、构造变形特征、印支面埋深、沉积沉降中心迁移特征等为依据,将下扬子区划分为5个一级、17个二级地质结构区。以构造稳定、有效保存及晚期生烃、晚期成藏等为评价标准,综合评价南黄海中部晚期隆起稳定区(Ⅰ2)、江都—东台—南黄海南部晚期沉降深冲断区(Ⅰ3)、泰兴—海安晚期沉降深冲断区(Ⅱ1)、南通—南黄海南部晚期沉降浅推覆区(Ⅱ2)及太湖晚期沉降浅推覆区(Ⅱ4)为下古生界油气勘探有利区;南黄海北部晚期沉降深冲断区(Ⅰ1)、江都—东台—南黄海南部晚期沉降深冲断区(Ⅰ3)、滨海—大丰晚期沉降深下古卷入区(Ⅰ4)和泰兴—海安晚期沉降深冲断区(Ⅱ1)为上古生界油气勘探有利区;南黄海北部晚期沉降深冲断区(Ⅰ1)、滨海—大丰晚期沉降深下古卷入区(Ⅰ4)、金湖—高邮晚期沉降深下古卷入区(Ⅰ5)及泰兴—海安晚期沉降深冲断区(Ⅱ1)为古潜山油气勘探有利区。研究对于该区海相中古生界勘探选区具有重要意义。

STRUCTURAL DIVISION OF MARINE MESOZOIC-PALEOZOIC IN LOWER YANGTZE REGION AND ITS SIGNIFICANCE FOR PETROLEUM EXPLORATION TARGETS

According to the basement features,structural deformation,depth of the Indo-surface and characteristics of depocenters and subsidence centers,the Lower Yangtze region has been divided into 5 first-order geological structure zones and 17 second-order zones mainly In terms of structural stability,effective preservation,and late-stage hydrocarbon generation,the second-order zones have been assessed.The Lower Paleozoic favorable zones for exploration include the late-stage uplifting stable region in centeral pa...