三角洲前缘水下分流河道储集层构型及剩余油分布  

Reservoir architecture and remaining oil distribution of deltaic front underwater distributary channel

作　　者：封从军[1,2] 鲍志东[2] 杨玲 思雄[1] 徐桂彬[1] 韩雄[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室 [2] 中国石油大学油气资源与探测国家重点实验室 [3] 中国石油集团测井有限公司

出　　处：《石油勘探与开发》2014年第3期323-329,共7页Petroleum Exploration and Development

基　　金：西北大学科研启动基金(PR12101);西北大学科学研究基金(12NW36)

摘　　要：以吉林扶余油田J19密井网区为例,结合现代浅水三角洲沉积模式,综合应用岩心、测井等资料,对三角洲前缘水下分流河道单砂体内部构型进行了精细解剖。水下分流河道内部构型要素主要可分为前积体和前积层2种,前积层根据被破坏程度的不同又可分为保留型、破坏型和混合型,随湖平面升降及沉积物供给速率与可容纳空间增加速率的比值不同,前积体可分为进积型、退积型和加积型,各自具有不同的成因及沉积演化模式。应用岩电标定、公式拟合、密井网、对子井等资料对前积层和前积体进行了定量识别描述,建立了水下分流河道单砂体内部的三维构型模型。剩余油分析表明:前积层对剩余油的垂向分布有较强的控制作用,而在前积体内部剩余油主要在前积体的上倾方向富集。Taking the J19 dense well network area in the Fuyu Oilfield as a case, combined with field outcrop and modern shallow water delta sedimentary model and using coring and logging data, this paper puts forward a comprehensive analysis method for reservoir architecture of deltaic front underwater distributary channel single sand body. The causes and sedimentary evolution mechanisms for foresets of retained type, destructive type and the mixed type and for foreset sand bodies of prograding type, retrograding type and aggrading type are summarized. The calibration of rock and logging, fitting formula, dense spacing wells and pair wells data are used to ascertain the foresets and foreset sand bodies. The models of three-dimensional reservoir architecture are set up. The analysis of remaining oil shows that foreset controls the vertical distribution of the remaining oil, while in the internal of the foreset sand bodies, the remaining oil is enriched in the updip direction.

关 键 词：三角洲前缘 水下分流河道 单砂体 储集层构型 剩余油分布 

分 类 号：TE122.1[石油与天然气工程—油气勘探]