论文部分内容阅读
地层岩性油气藏是苏北盆地寻找新生代非构造圈闭油气藏的一种重要类型。文章利用地震地层学的概念,对苏北陆相沉积盆地的新生代地层作了初步应用。1.根据削蚀、顶超、上超、下超标志对苏北盆地东台拗陷新生界进行地震层序的划分和沉积特征的分析。2.对东台拗陷各凹陷整个新生代时期的水体变化作了初步探讨;虽属陆相盆地,其水体升降基本可与全球性海平面升降相对比。3.对各凹陷的阜宁组、戴南组、三垛组地层的主要地震相进行分析和解释,指出浊流河道、三角洲、水下冲积扇、礁滩、地层岩性尖灭和砂岩透镜体的发育。4.明确古水系的分布、流向和沉积相的纵横组合。并指出可能的几种油气藏类型。
Stratigraphic lithologic reservoirs are an important type in the search for Cenozoic non-structural traps in the Northern Jiangsu Basin. By using the concept of seismic stratigraphy, the paper makes a preliminary application of the Cenozoic strata in the continental sedimentary basins of northern Jiangsu Province. 1. Based on the analysis of the sequences and sedimentary features of the Cenozoic strata in the Dongtai Depression in the Subei Basin, The changes of water bodies in the whole Cenozoic period in the sag of the Dongtai depression were discussed. Although the continental basins, the water movements can basically be compared with the global sea level rise and fall. The main seismic facies of the Funing Formation, Dainan Formation and Sandun Formation in each depression are analyzed and explained. It is pointed out that turbidite channel, delta, alluvial fan, reef beach, stratigraphic lithology and sandstone lens Body development. 4. Clear the ancient water system distribution, flow and sedimentary facies of vertical and horizontal combination. And pointed out the possible types of reservoirs.