叠合盆地构造解析几点思考

TECTONIC ANALYSIS OF SUPERIMPOSED BASINS

汤良杰 金之钧 贾承造 马宗晋 曲国胜

TANG Liangjie JIN Zhijun JIA Chengzao MA Zongjin QU Guosheng

石油大学石油天然气成藏机理教育部重点实验室, 北京 102249 2. 石油大学盆地与油藏研究中心, 北京 102200 3. 中国石油天然气股份有限公司北京100011 4. 中国地震局地质研究所, 北京 100029

Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, Beijing 102249, China 2. Basin&Reservoir Research Center, University of Petroleum, Beijing 102200, China 3. PetroChina Company Limited, Beijing 100011, China 4. Institude of Geology, State Seismological, Beijing 100029, China

我国大多数含油气盆地以多期叠合为特征,盆地演化具有阶段性,不同的演化阶段具有不同的大地构造环境、海陆分布和盆地原型。缝间就位和山间就位是我国叠合盆地的重要特点,反映了盆地经历了多期次的伸展裂解、俯冲消减、碰撞闭合以及后碰撞期的伸展挤压旋回。在叠合盆地构造解析中,应该特别重视对古生代非典型克拉通和中新生代非典型前陆盆地及其叠合历史的研究,确定关键构造变革期及其对盆地转型的影响,分析盆地不同构造期变形样式及其在平面和剖面上的变化,揭示基底盖层统一构造变形历史,恢复盆地系统形成过程和耦合历史,为叠合盆地油气生成和运移聚集研究提供背景资料。

Major petroliferous basins in China are characterized by poly-stage superimposition.The evolution of basins is stepwise.Different evolutionary stages have different geotectonic environment,continental oceanic distribution and proto tpye basins.The important features of superimposed basins in China are interfracture emplacement and intermountain emplacement.This reflects that the basins have experinced poly-stage extension cracking,subduction,collision closure and the extension compressional cycles in post-collisional periods.In the tectonic analysis of superimposed basins,more attention must be paid to the study of the Paleozoic untypical craton,the Meso-Cenozoic untypical foreland basin and their superimposition history.So, the key tectonic periods of cransformation and their effects on the transition of basin types are determined,the deformed styles in the different tectonic periods of basins and their changing in plane and in section are analysed,the basement-cover united tectonic deformation history is revealed,and the forming course and coupling history of basin systems are restored.This privides background information for the hydrocarbon generation,migration and accumulation in superimposed basins.

国家重点基础研究发展规划项目(G1999043305)

https://doi.org/10.11781/sysydz200103251