鄂尔多斯盆地冯地坑—洪德长8油层组湖岸线确定

详细信息

收稿日期: 2010-09-11

DETERMINATION OF LAKE SHORELINE FOR CHANG-8 OIL FORMATION IN FENGDIKENG-HONGDE REGION OF ORDOS BASIN

Received Date: 11 September 2010

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。
- 鄂尔多斯盆地 /
- 湖岸线 /
- 延长组 /
- 辫状河三角洲
Abstract: 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.
- Ordos Basin /
- delta lake shoreline /
- Yanchang Formation /
- braided river delta