摘要
鄂尔多斯盆地下奥陶统马家沟组碳酸盐岩分布广，但有机质丰度较低，且成熟度高。通过对马家沟组碳酸盐岩中的有机质丰度、类型及成熟度在三维空间分布特征的研究，指出盆地中部马五段、马三段蒸发台地相碳酸盐岩为较好的烃源岩，盆地内其余地区和层位的碳酸盐岩为较差的烃源岩。烃源岩的分布受碳酸盐岩沉积相和盆地基底构造所控制。
The carbonate rocks in the Lower Ordovician Majiagou Formation of Ordos Basin are widely distributed , but their organic matter content is low and maturation high. Based on the analyses of the three dimensional distribution of organic matter abundance, organic matter type and organic matter maturation, the paper points out that the carbonate rocks of evaporite platform facies of O 1 m 5 and O 1 m 3 Member in the middle part of the basin are better source rocks. The other carbonate rocks in the Majiagou Formation are poorer source rocks. The distribution of source rocks are controlled by the sedimentary facies of the Majiagou Formation and the basement tectonics of the basin.
出处
《成都理工学院学报》
CSCD
1999年第3期217-220,共4页
Journal of Chengdu University of Technology
基金
国家"九五"重点科技攻关项目
关键词
碳酸盐岩
烃源岩
鄂尔多斯盆地
油气田
carbonate rocks
organic matter abundance
organic matter type
organic matter maturation
source rocks
