摘要
板桥凹陷沙河街组滩坝沉积十分发育，为成熟度很高的中、细砂岩，分选磨圆较好，常见板状、楔状交错层理，形成于湖进或湖退阶段。滩砂体多呈正旋回层序，坝砂体多呈反旋回层序，以后者居多。滩坝孔隙度、渗透率都高，物性明显好于其他沉积相，是很好的油气储层。
Abstract Beaches and sand bars developed well in the Shahejie Formation,Banqiao Depression.They are mainly high matured medium or fine grained sandbodies with good degree of sorting and good psephicity,platy wedged shaped and parallel cross bedding,formed in transgression or regression process.The beaches usually occur normal cyclic sequence and the bars are in reversal cyclic sequence.Their porosity and permeability are high,and lithophysical property is better than other sediments.So they are good oil and gas reservoirs.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1998年第4期351-355,共5页
Oil & Gas Geology
