【摘要】 以单井相、地震相为基础,对珠三坳陷北部文昌组进行了沉积相分析,明确了文昌组发育陆相河湖沉积体系,各凹陷从缓坡带到陡坡带沉积相顺序依次为:辫状河-曲流河-湖泊-扇三角洲(冲积扇)。其中河流分布面积最为广泛,湖泊分布面积相对局限,半深湖仅在凹陷沉积中心附近发育。珠三坳陷北部文昌组沉积相发育分布的主控因素有控凹断裂发育位置及活动性、物源供应程度等,这些因素不但控制了沉积相展布,还控制了烃源岩的发育位置。更多还原

【Abstract】 According to the analysis of well drilling and seismic faces,Wenchang Formation in northern part of Zhu III Depression in Pearl River Mouth Basin are mainly continental rivers and lake.From slowly slope belt to steep slope belt, the sedimentary faces sequence is regular,which is braided river,meandering river,lake and fan-delta or alluvial fan.Rivers are the mostly fargoing during these faces.Lakes are localized and the middle-deep lake face grows on the places around the sedimentary and subsiding center,where the water was deep relative to other places during Wenchang Formation period.The position of mainly controlling faults in a sag,faults activity and the degree of provenance supply etc,are the controlling factors of the sedimentary faces of Wenchang Formation.These factors not only controlled the distribution of sedimentary faces,but also controlled the growing position of the source rock.更多还原