摘要
以鄂尔多斯盆地冯地坑—洪德地区延长组长8油层组为例,重点通过对研究区铁元素地球化学特征的研究划分出湖岸线的大致位置,并进一步结合辫状河三角洲平原和前缘在岩性、粒度、沉积构造、生物化石、沉积层序等方面的不同特征,精确确定了研究区长8油层组时期辫状河三角洲平原与前缘的界限,即湖岸线的位置,为该区进一步的油气勘探和有利区块预测提供可靠的地质依据。
The rough location of lake shoreline was confirmed for the Chang-8 oil Formation of the Yanchang Formation from Fengdikeng-Hongde area of Erdos basin,through the integrated study of geochemical patterns of Fe element in combination with lithology,grain size distribution,sedimentary structures,fossils and stratigraphic sequences.Integrated information from the region made it possible to precisely draw out the boundary between the braided river delta plain and delta front during the period the Chang-8 oil Formation was deposited.The boundary,in fact,is close to the shoreline of the lake.The results offered a reliable geological reference for palaeogeographic reconstruction and are very helpful for oil and gas exploration in the region.
出处
《海洋地质前沿》
北大核心
2011年第4期38-44,共7页
Marine Geology Frontiers
基金
冯地坑-洪德长8-长4+5成藏控制因素及评价目标研究
关键词
鄂尔多斯盆地
湖岸线
延长组
辫状河三角洲
Ordos Basin
delta lake shoreline
Yanchang Formation
braided river delta
