柴达木盆地切16块路乐河组干旱型冲积扇沉积构型表征  

CHARACTERIZATION OF ARID ALLUVIAL FAN FORMATION OF QIE 16 PIECES OF LULEHE FORMATION IN QAIDAM BASIN

作　　者：季政君 荐鹏[1] 闵忠顺[1] 张宇[1] 张丽娜[1] 孟令娜[1] JI Zheng-jun;JIANG Peng;MIN Zhong-shun

机构地区：[1]中国石油辽河油田公司勘探开发研究院

出　　处：《新疆石油天然气》2019年第3期18-21,4-5,共4页Xinjiang Oil & Gas

摘　　要：在区域沉积背景分析基础上,应用研究区丰富的岩心、测井等资料,深入解剖切16块路乐河组下段干旱型冲积扇内部沉积构型,总结构型单元剖面及平面分布规律,结果表明:①顺物源剖面上,整体在砂组级别呈退积正旋回特征,优势相为扇中辫流水道,主要发育在顶部1砂组的1、2小层,剖面上连续性好,延伸距离远;②垂直物源剖面上,辫流水道呈顶平底凸状,水道宽度300~900 m,空间叠置关系呈现四种构型样式,分别为孤立状辫流水道、辫流水道-辫流水道叠置、辫流水道-辫流水道对接、辫流水道-漫流砂体对接;③平面上,从下至上各小层构型单元平面分布规律呈现明显退积特征,反应水进旋回,扇中面积占比越来越大,辫流水道形态从窄带状过渡为网状,顶部1、2小层辫流水道最发育.研究成果与动态资料吻合度高,纵向主力产油层、主力吸水层主要位于油藏顶部1、2小层,平面注水受效井主要集中在扇体西部辫流水道发育部位.该成果对区块注采井网的调整、新井部署方案的选择具有指导意义,对同类油藏开发研究具有一定借鉴意义.On the basis of regional sediment background analysis,the internal sedimentary configuration,generalstructural unit profile and plane distribution rule of the dry alluvial fan in the lower section of the lulehe groupwere dissected and cut in depth on the basis of abundant data such as cores and logs in the research area. The re-sults show that:(1). On the profile of the source,the whole is characterized by positive rotation of the product atthe sand group level,and the dominant phase is the braided flow channel in the fan. It mainly develops in the 1 and 2 layers of the top 1 sand group. The continuity is good on the profile and the extension distance is far;(2) Onthe vertical material source profile,the braided water channel is convex at the top and the width of the waterchannel is 300-900 m. The spatial superposition relationship presents four configurations. They are isolatedbraided water channel,braided water channel-braided water channel superposition,braided water channel-braided water channel docking,braided water channel-diffuse sand body docking;(3) On the plane,from the bot-tom to the top,the plane distribution of the small layer configuration units shows obvious deaccumulation charac-teristics,reaction water precession,the area in the fan accounts for more and more large,and the shape of thebraided flow channel transitions from a narrow band to a mesh. The top 1,2 small layer braid flow channel is themost developed. The results of the study are in good agreement with the dynamic data. The main vertical oil pro-ducing layer and main suction layer are mainly located in the top 1 or 2 layers of the reservoir. The plane waterinjection effect well is mainly concentrated in the development site of the Western braid channel of the fan body.The results are of guiding significance to the adjustment of block injection well network and the selection of newwell deployment scheme.

关 键 词：切16块 干旱型冲积扇 沉积构型 辫流水道 

分 类 号：TE121.3[石油与天然气工程—油气勘探]