关键词: 低成熟油, 地质评价, 产状, 类型, 油气资源, 中国

Abstract: Low mature oil as an important kind of oil－gas resources has catched most petroleum geologists and geochemists' attention and caused their great interest day by day,but from published papers that have relation to studies of this kind of oil,we can almost see all of them focus their attention on characteristics and hydrocarbon generation mechanism.Therefore,it is rarely to get a sight of papers with regard to the study of geological distribution characteristics of this kind of oil.To explore effectively this kind of oil,it is necessary to study and sum up the geological distribution characteristics of this kind of oil.For this purpose,the authors investigated 14 basins in China where exists low mature oil and studied this kind of oil from regional distribution characteristics,buried depth,ages of the oil layers and so on.Based on the studies,the authors point out that low mature oil not only distributes extensively in regions of China,but also mainly congregates in regions of eastern China.The age of the great majority of oil－generating layers is in Tertiary.In general,the oil reservoirs have many types and they may be located at different places in oil and gas basins,and most of them are buried shallow less than 3,000 meters and controlled by formation and lithology,especially by sedimentary tectonics.After discussing possible factors of influence,authors put forward the suggestions in which this kind of oil could be found much more easily.

Key words: low mature oil, gealogy evaluation, occurrence type, oil and g, resaurces, China