摘要:
研究不同地质体之间的密度差异是开展重力勘探研究的地球物理前提。密度界面的划分与构造层的划分具有密切关系,测定地层(岩石)密度并分析测定结果是重力勘探工作的重要内容。依据苏北盆地及相邻地区出露岩石的实测密度数据,将该区岩石按照地层、侵入岩进行系统整理和归纳,将地层纵向划分为新生界、侏罗系—白垩系和太古宇—三叠系3个超密度层,2个Ⅰ级密度界面和3个Ⅱ级密度界面; 通过综合分析地层界际密度和系际密度特征,阐述地层及侵入岩的密度特征及其与重力异常的关系,为该盆地重力资料解释和石油勘探提供可靠的地球物理依据。密度界面的划分与区域构造及储油构造具有密切关系,计算密度分界面起伏或深度变化在区域构造研究和石油勘探中具有重要意义。
Abstract:
Study on the density differences of different geological bodies is the geophysical precondition of gravity exploration. The division of density interface has a close relationship with the division of structural layers, and the determination and analysis of the strata (rocks) density is the important content of gravity exploration. On the basis of the density data of the outcrop rocks in the Northern Jiangsu Basin and the adjacent areas,the authors collated and summarized the rocks in the study area by division of the strata and intrusive rocks. And the vertical strata was divided into three super density layers (Cenozoic, Jurassic-Cretaceous and Archaean-Triassic), including two Ⅰ density interfaces and three Ⅱ density interfaces. Through the comprehensive analysis of strata density characteristics, the authors expatiated the relationship between the density characteristics of the strata and intrusive rocks and the gravity anomaly in gravity data interpretation, which provided a reliable precondition and basis for the gravity interpretation and oil exploration in the basin. The division of density interface has a close relationship with the regional structure and reservoir structure, and calculating the density interface or depth changes has a great significance in the regional structure research and petroleum exploration.
百度学术
下载:
