文安斜坡外带东三段沉积微相研究  

Study on sedimentary microfacies of Dong 3 interval in the outer zone of Wen'an slope

作　　者：赵兰[1] 陈恭洋[1] 汪飞[1] 孙悦文[1] 

机构地区：[1]长江大学资源信息应用技术研究所,湖北荆州434023

出　　处：《石油地质与工程》2013年第2期18-21,137-138,共4页Petroleum Geology and Engineering

摘　　要：通过岩心观察,结合测井、分析化验等资料,对文安斜坡外带东三段的沉积微相类型、平面展布特征以及沉积演化进行了系统分析。研究结果表明,东三段为曲流河沉积,主要发育河床亚相和河漫亚相,沉积微相类型为河道充填、边滩和河漫滩;河道砂体受河流控制,具有明显的分叉与汇合现象,呈弯曲条带状分布,边滩发育于河道内弯处,河漫滩大面积分布于河床外侧;河流由河道下切、河道侧积向泛滥平原化演化;与斜坡构造背景相配合的河道侧缘和边滩顶部砂体有利于形成岩性和岩性-构造油气藏。The types of microfacies, characteristics of planar distribution and evolution of sedimentary have been systematically analyzed based on the observation of cores, well logging and analysis assay data. The conclusions show that the study area of Dong 3 interval is comprised by meandering river, mainly developed channel and flood subfacies, the types of microfacies are channe fill, point bar and flood plain. With obvious bifurcation and confluence phenomenon, channel sand body controlled by the river presents a bending strip distribution. Point bar is developed in the river inturn and flood plain is area distributed in the lateral of river. The river has evolved from channel's incision, lateral accretion to the flood plain. And the conclusions also show that the lateral margin of channel body and the top of point bar, matched with the slope structure background are favour of forming lithological and litho-structural reservoir.

关 键 词：文安斜坡 东三段 沉积微相 河道充填 边滩 河漫滩 

分 类 号：TE111.3[石油与天然气工程—油气勘探]