摘要
在鄂尔多斯盆地三叠系延长组和四川盆地侏罗系沙溪庙组砂岩储层中,广泛发育浊沸石胶结物,而且常常被有机酸性水溶蚀形成大量浊沸石溶孔,勘探实践证明,浊沸石溶孔是油气的主力储集空间。通过对浊沸石的形成与分布、浊沸石次生溶孔的形成机理及其分布规律等研究,认为沉积物源和沉积微相控制着浊沸石的分布,有机酸性水的来源和运移通道决定着浊沸石次生溶孔的分布特征,浊沸石溶蚀孔隙发育带又控制着岩性油气藏的分布规律。
As one type of cements , laumonitide often develops in sandstone of Triassic Yanchang Formation in Ordos Basin and Jurassic Shaximiao Formation in Sichuan basin. Moreover the laumonitide is often dissolved by organic acid water to form lots of secondary pores. The practice of oil-gas exploration in Ordos Basin and Sichuan Basin confirms that secondary pores dissolved from laumonitide are major stored space of oil-gas. In the paper, with studying origin and distribution of laumonitide and the forming mechanism and distribution law of its secondary dissolved pore, it is considered that origin and distribution of laumonitide are controlled by sedimentary materials source and sedimentary micro-facies, and the distribution feature of secondary pores dissolved from laumonitide are controlled by the sources and migration pathway of organic-acid water.
出处
《中国石油勘探》
CAS
2006年第2期33-38,共6页
China Petroleum Exploration
