苏北盆地上白垩统—第三系页岩油气成藏层位及有利区带

Hydrocarbon accumulation and favorable zone of shale oil and gas in upper Cretaceous-Neogene of North Jiangsu Basin

苏北盆地上白垩统—第三系分布广,地层完整。其中泰州组二段、阜宁组二段和阜宁组四段泥页岩发育,厚度为100～250m,有机质丰富,有机碳一般大于1.0%,演化程度高,并在泥页岩中见到了良好的油气显示,表明苏北盆地具备了泥页岩油气成藏的地质条件。通过对苏北盆地上白垩统—第三系基本石油地质条件分析,指出苏北盆地的金湖凹陷、高邮凹陷、海安凹陷和盐城凹陷的深凹带是泥页岩油气勘探、开发的有利区带。

The upper Cretaceous-Neogene layers were widely distributed in North Jiangsu Basin and the formations were complete. In which, mud shale was developed in the second member of Taizhou Formation, the second member of Funing Formation and the fourth member of Funing formation, with a thickness of 100 - 250 m, and rich organic matters, and over 1.0% of the organic carbon, and high extent of evolution. Fine oil and gas indications were showed in the mud shale, demonstrating that North Jiangsu Basin was provided with geological conditions of oil and gas reservoir. Through analyses of fundamental petroleum geological conditions of upper Cretaceous-Neogene in North Jiangsu Basin, the authors pointed that in the deep areas of Jinhu Sag, Gaoyou Sag, Haian Sag and Yancheng Sag in North Jiangsu Basin were favorable zones of shale gas exploration and development.