摘要
依据近期勘探资料,结合前人研究成果,通过对中央古隆起的形态、核部出露地层、形成发育的力源机制及其演化特征进行系统分析后认为:鄂尔多斯盆地中央古隆起形成于早寒武世,来自祁连海槽由西向东的挤压应力和秦岭海槽由南向北的挤压应力是中央古隆起形成和发育的动力学基础。在鄂尔多斯盆地由裂谷沉积发展为碳酸盐岩台地的过程中,中央古隆起先后经历了台内隆起和台缘隆起两个阶段。因此,中央古隆起的持续发育对鄂尔多斯盆地古生界沉积格局和天然气的早期成藏具有重要的控制作用,指出古隆起区及其周缘斜坡带,目前仍具有较大的勘探潜力。
Through systematically analyzing the shape of the Central paleouplift, the strata cropped out at its core, and the dynamical mechanism and evolution characteristics of its formation and development according to recent exploration data and predecessors' research achievements, it was considered that the Central paleouplift in E'erduosi Basin was formed in Early Cambrian; the west-to-east compressive stress coming from Qilian trough and the south-to-north compressive stress coming from Qinling trough were the dynamical base of the formation and development of the Central paleouplift; and the paleouplift had successively suffered two developing stages of intraplatform uplift and platform edge uplift in the process of E'erduosi Basin' s expansion from rift deposit to carbonate platform deposit. Therefore the sustained development of the Central paleouplift had important control effect on the Palaeozoic sedimentary framework and early gas reservoir formation in E'erduosi Basin, and the paleouplift area and the slopes Surrounding it are still prospective for gas exploration at present.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第4期23-26,共4页
Natural Gas Industry
关键词
鄂尔多斯盆地
气藏形成
成因分析
形态特征
沉积特征
成藏分析
Carbonates
Compressive stress
Natural gas
Petroleum reservoirs
Sedimentation
Sustainable development
