渤海海域稀井网条件下曲流河储层构型表征  

Characterization of meandering-river reservoir architecture under sparse well pattern condition in Bohai Sea

作　　者：李冰娥[1] 尹太举[1] 王杨君 LI Bing'e;YIN Taiju;WANG Yangjun(College of Geosciences,Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100

出　　处：《大庆石油地质与开发》2022年第2期1-10,共10页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“湖盆萎缩期河湖交替沉积记录特点及沉积过程响应机制”(41672119);国家重大专项“渤海大型复杂河流相储层沉积过程响应机制及内部结构剖析”(2016ZX05058-001-002)。

摘　　要：渤海湾盆地A油田新近系明化镇组曲流河发育,为了精确和高效挖潜剩余油,需要精细刻画储层构型。在海域稀井网条件下,充分利用高分辨率地震及水平井资料,采用储层构型层次分析法,对曲流河储层复合曲流带S砂体进行解释追踪,然后进行单一曲流带的划分,并在此基础上解剖河道内部点坝,对侧积体进行定量表征。研究认为:S砂体发育4条单一曲流带,单河道宽度为200~1000 m,点坝跨度为180~770 m;侧积层倾向为废弃河道方向,侧积层倾角为4~14°,侧积体水平间距为40~70 m,侧积体水平宽度为50~110 m,侧积层水平宽度为2~14 m,侧积层厚度为0.1~0.9 m。用实钻水平井资料对表征结果进行验证表明,此次研究结果较前人的经验公式计算更为精准,可为后期油田高效开发剩余油提供有效指导。Meandering river deposits are well developed in Neogene Minghuazhen Formation of Oilfield A in Bohai Bay Basin.In order to accurately and efficiently tap the remaining oil,it is required to finely characterize the reservoir architecture.Under the condition of sparse well pattern in the sea area,making use of high-resolution seismic data and horizontal well data,the interpretive tracing on the compound meander belt is conducted for S sandbody in the meandering river reservoir by adopting analytic hierarchy process for the reservoir architecture.Then single meander belts are divided;on the basis of the above,the point bars in the channels are dissected and lateral accretion bodies are quantitatively characterized.The studies show that 4 single meandering belts are developed in S sandbody with single channel width of 200~1000 m and point bar span of 180~770 m.The lateral accretion bedding leans to the abandoned channel,the lateral accretion inclinations is 4°~14°,the horizontal spacing and horizontal width of lateral accretion bodies are 40~70 m and 50~110 m respectively,the horizontal width of lateral interlayer is 2~14 m,and the thicknesses of lateral accretion bedding is 0.1~0.9 m.The verification of the characterization results with the actually drilled data of horizontal well shows that compared with the previous empirical formula calculations,the study results are more precise and can provide effective guidance for efficient development of the remaining oil in the later stage of oilfield.

关 键 词：曲流河 储层构型 点坝 水平井 稀井网 渤海湾盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]