Research on Sedimentary Characteristics and Evolution Law of Reservoir in E2l3 of Wushi A Oilfield
汪明伟 1岳绍飞 1王磊 1孙天竹 1黎明涛1
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作者信息
1. 中海石油(中国)有限公司湛江分公司 广东 湛江 524057
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摘要
本文以沉积学、层序地层学等理论为指导,基于岩心、壁心宏观和微观特征分析,结合岩石相、测井相和地震相标志研究,认为乌石 A 油田流三段沉积时期,发育辫状河三角洲沉积,并进一步识别出辫状河三角洲前缘水下分流河道等 6 种沉积微相.研究认为,乌石 A 油田流三段处于湖进体系域的中早期,早期平原亚相较为发育,随着水体加深,平原亚相逐渐向前缘逐渐过渡,晚期主要发育辫状河三角洲前缘亚相.
Abstract
This paper is guided by theories such as sedimentology and sequence stratigraphy,based on the analysis of macroscopic and microscopic characteristics of cores and wall rocks,combined with the study of lithofacies,well logging facies and seismic facies markers.It is believed that the flow section 3 of Wushi A Oilfield is a braided river delta deposit,and further identified six types of sedimentary microfacies such as underwater distributary channels in the front of braided river delta.The research suggests that the flow section 3 of Wushi A Oilfield is in the middle and early stage of lake advance system domain,with the braided river delta plain being the main feature in the early stage.As the water body deepens,the braided river delta plain gradually shrinks,and the front of braided river delta gradually develops.In the late stage,it is dominated by deposition in the front of braided river delta.
关键词
乌石A油田/流三段/沉积相/辫状河三角洲
Key words
Wushi A oilfield/E2l3/Sedimentary facies/Braided river delta
维普
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