摘要
基于地表地质、探井、重磁电与地震勘探资料分析,将盆地与周缘造山带相结合统一成图,对地质历史时期鄂尔多斯原型盆地的边界、分布范围、地质结构与构造属性等开展系统解析。研究表明,鄂尔多斯地块的西界为恩格尔乌苏断裂带,东界为太行山山前断裂带,北界为索伦—西拉木伦缝合带,南界为商丹缝合带;鄂尔多斯盆地的边界在中元古代—古生代为板块边界,在中新生代为陆内变形边界;该盆地在中元古代—奥陶纪为覆盖整个鄂尔多斯地块的海相克拉通盆地、石炭纪—二叠纪为板块边缘岛弧隆起带围限下的海陆过渡相坳陷盆地、三叠纪为陆内统一湖相坳陷盆地、新生代为裂谷体系环绕的陆内克拉通盆地,盆地范围自古至今逐步缩小。大型原型盆地的广覆性决定了油气勘探范围远超现今沉积盆地范畴,勘探层系为纵向多目的层系。鄂尔多斯盆地具有“全油气(或成矿)系统”的特点,盆地深层中元古界宽裂谷体系“盆下盆”和寒武系—奥陶系被动陆缘盆地与克拉通内坳陷将成为油气勘探重要接替领域。
Based on the analysis of surface geological survey,exploratory well,gravity-magnetic-electric and seismic data,and through mapping the sedimentary basin and its peripheral orogenic belts together,this paper explores systematically the boundary,distribution,geological structure,and tectonic attributes of the Ordos prototype basin in the geological historical periods.The results show that the Ordos block is bounded to the west by the Engorwusu Fault Zone,to the east by the Taihangshan Mountain Piedmont Fault Zone,to the north by the Solonker–Xilamuron Suture Zone,and to the south by the Shangnan-Danfeng Suture Zone.The Ordos Basin boundary was the plate tectonic boundary during the Middle Proterozoic to Paleozoic,and the intra-continental deformation boundary in the Meso-Cenozoic.The basin survived as a marine cratonic basin covering the entire Ordos block during the Middle Proterozoic to Ordovician,a marine–continental transitional depression basin enclosed by an island arc uplift belt at the plate margin during the Carboniferous to Permian,a unified intra-continental lacustrine depression basin in the Triassic,and an intra-continental cratonic basin circled by a rift system in the Cenozoic.The basin scope has been decreasing till the present.The large,widespread prototype basin controlled the exploration area far beyond the present-day sedimentary basin boundary,with multiple target plays vertically.The Ordos Basin has the characteristics of a whole petroleum or deposition system.The Middle Proterozoic wide-rift system as a typical basin under the overlying Phanerozoic basin and the Cambrian–Ordovician passive margin basin and intra-cratonic depression in the deep-sited basin will be the important successions for oil and gas exploration in the coming years.
作者
何登发
成祥
张国伟
赵文智
赵喆
刘新社
包洪平
范立勇
邹松
开百泽
毛丹凤
许艳华
成昌宇
HE Dengfa;CHENG Xiang;ZHANG Guowei;ZHAO Wenzhi;ZHAO Zhe;LIU Xinshe;BAO Hongping;FAN Liyong;ZOU Song;KAI Baize;MAO Danfeng;XU Yanhua;CHENG Changyu(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;Department of Geology,Northwest University,Xi’an 710069,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;PetroChina Changqing Oilfield Company,Xi’an 710021,China)
出处
《石油勘探与开发》
北大核心
2025年第4期757-771,共15页
Petroleum Exploration and Development
基金
国家自然科学基金重点项目“上扬子克拉通盆地深层新元古代裂谷体系的结构、成因及其控油气作用”(42330810)
中国石油长庆油田分公司重大科技专项“鄂尔多斯盆地及周缘中元古界-奥陶系构造-沉积环境、成源机制与勘探新领域”(ZDZX2021-01)。
关键词
盆地边界
原型盆地
构造属性
能源矿产
叠合盆地
全油气系统
油气勘探领域
鄂尔多斯盆地
basin boundary
prototype basin
tectonic attribute
energy and ore deposit
superimposed basin
whole petroleum system
oil and gas exploration area
Ordos Basin
