莺歌海盆地莺歌海组二段浪控砂坝储层构型分析  

Reservoir architecture analysis of wave-dominated sandbar from the second member of Yinggehai formation,Yinggehai Basin

作　　者：罗佼 莫冯阳 LUO Jiao;MO Fengyang(CNOOC(China)Limited,Hainan Branch,Haikou Hainan 570100,China)

机构地区：[1]中海石油(中国)有限公司海南分公司,海南海口570100

出　　处：《石油化工应用》2024年第12期76-80,共5页Petrochemical Industry Application

摘　　要：浪控砂坝作为海陆过渡沉积体系中发育的重要沉积类型,也是莺歌海盆地东方气田莺歌海组二段的重要储层类型之一。为了支持东方气田进一步滚动开发,亟需对莺歌海组二段发育的浪控砂坝开展储层构型分析。在前人认识的基础上,本次研究应用三维地震资料分析,对莺歌海组二段浪控砂坝开展了储层构型分析。研究结果表明,浪控砂坝包括5级构型要素复合砂坝和4级构型要素单一砂坝。其中,5级构型要素复合砂坝宽度为4.0~6.0 km,厚度为30~70 m,宽厚比为50~160;4级构型要素单一砂坝宽度为0.9~2.0 km,厚度为20~45 m,宽厚比为30~115,表明宽厚比参数可以有效指示浪控砂坝发育规模。同时,各级构型要素平面展布揭示沉积物由分流河道自西向东输送沉积形成浪控砂坝,且在后期泥质水道和波浪作用影响下,呈现南北向条带状展布。As an important sedimentary type developed in the marine-continental transitional sedimentary system,the wave-dominated sandbar is also one of the important reservoir types in the second member of Yinggehai formation in Dongfang gasfield,Yinggehai Basin.In order to support the further rolling development of the Dongfang gasfield,it is urgent to analyze the reservoir architecture of the wave-dominated sandbar developed in the second member of Yinggehai formation.On the basis of previous understanding,this study applied three-dimensional seismic data to analyze the reservoir architecture of the wave-dominated sandbar in the second member of Yinggehai formation.The results show that the wave-dominated sandbar include five-level architecture element composite sandbar and four-level architecture element single sandbar.Among them,the width of the composite sandbar of the five-level architecture element is between 4.0~6.0 km,the thickness is between 30~70 m,and the width-thickness ratio is between 50~160,the width of single sandbar with four-level architecture element is between 0.9~2.0 km,the thickness is between 20~45 m,and the width-thickness ratio is between 30~115,indicating that the width-thickness ratio parameters can effectively indicate the development scale of wave-dominated sandbar.At the same time,the plane distribution of architecture elements at all levels reveals that the sediment is transported from the west to the east through the distributary channel to form a wave-dominated sandbar,and under the influence of the later muddy channel and wave action,the wave-dominated sandbar presents a north-south strip distribution.

关 键 词：储层构型 浪控砂坝 莺歌海组 莺歌海盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]