储层沉积微相研究——以下二门油田核三段砂体为例

STUDY ON SEDIMENTARY MICROFACIES:TAKING H3 SUBMEMBER OF XIA′ERMEN OILFIELD AS AN EXAMPLE

以河南省下二门油田核三段为例 ,详细阐述了储层沉积微相研究方法。该油田研究层段属辫状河三角洲体系的前缘相带 ,可划分出水下分流河道、河口砂坝、前缘席状砂和前三角洲泥四种主要的沉积微相类型。通过对岩心和测井资料的分析 ,建立了该区的岩—电关系图版 ,并绘制了沉积微相平面展布图 。

Xia′ermen Oilfield lies in the delta front of a braided stream,and can be divided into four sedimentary microfacies:subaqueous distributary channel,river mouth sand bar, front sheet sand, and front delta mud.Thaking H3 submember of the oilfield as an example,this paper describes in detail the study method of sedimentary microfacies.On the basis of core description and log curves analysis,it has erected a lithofacies and electrofacies graph panel in this area. In addition,it presents the plane distribution maps of sedimentary microfacies and the plane and vertical distribution patterns of the sedimentary microfacies of H3 submember.