Abstract: Based on the study of abundant stratigraphic data and fossils from about 500 wells in Jizhong de-pression,the relation between the biota and environment has been explored and five biofacies,i.e.fluvial-deltaic biofacies,littoral-shallow lacustrine biofacies,shallow lacustrine biofacies,shallow-semideep lacustrine biofacies and semideep-deeplacustrine biofacies,havebeen distinguished.And the paleogeography and Paleoclimate of paleogene in Jizhong depression have also been discussed.According to the analytical data and practice of petroleum exploration,it is indicated that the best source area is in the deeper part of the paleolake and the favorable reservoirs distribute in the margin of the deeper part of the paleolake and its adjacent area.

摘要： 本文在深入研究冀中坳陷500余口井地层古生物资料(2.4万余样品)的基础上,探索了生物和环境之间的关系,划分出A、B、C、D、E五种生物相带(大体与从河流到深湖的古环境分别对应)、并进而推论了不同组段沉积期的古地理和古气候.分析资料和勘探实践表明,各组段沉积期的湖盆深水区是最好的生油岩分布区;深水湖区和较浅水区的界线附近是有利的储油地带.

关键词: 冀中坳陷, 早第三纪, 生物相, 古气候, 古地理环境, 生物地层带油气分布