埕岛油田馆陶组曲流河砂体叠置模式  

Sandbody superimposed pattern of meandering river facies of Guantao Formation in Chengdao Oilfield

作　　者：刘丽 LIU Li(Research Institute of Exploration and Development,Sinopec Shengli Oilfield Company,Dongying 257015,Shandong,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《岩性油气藏》2019年第1期40-48,共9页Lithologic Reservoirs

基　　金：山东省博士后创新项目专项基金项目"埕岛油田大井距条件下砂体配置关系研究"(编号:179655);中国石化集团公司课题"埕岛油田整体注采关键技术研究"(编号:P17031-1)联合资助

摘　　要：埕岛油田馆上段发育了多套河流相沉积砂体,砂体间的连通关系具有差异性,造成研究区注采不均衡。针对埕岛油田馆上段具有大斜度井多、井距大、砂体变化快、地震资料识别单砂体能力局限等特征,在井点分析的基础上,结合波动方程正演和地质统计学反演等多种方法进行综合判别,建立了埕岛油田5种河流相砂体配置模式,分别为纵向上的分离式、复合叠置式以及侧向上的分隔式、河岸接触式和切叠式。纵向上分离式河道内砂体连通性好,复合叠置式上下层砂体之间切叠,砂体不连通,注水不受效,产量递减快。侧向上分隔式砂体基本不连通,河岸接触式砂体连通性差,受效慢;切叠式的两期河道砂体部分叠加,切叠厚度大的砂体连通性好,注水受效快,切叠厚度小的2条单河道之间砂体连通性差。该成果为实现油田均衡注采提供了依据。There are many sets of fluvial facies sandbodies developed in the upper Guantao Formation in Chengdao Oilfield,and the connectivity between the sandbodies is different,resulting in uneven injection and production in the study area. The upper Guantao Formation of Chengdao Oilfield has the characteristics of many high angle holes,large well spacing,rapid change of sandbodies,and limited ability of seismic data to identify single sandbody. On the basis of well-point analysis,a comprehensive identification was carried out combined with wave equation forward modeling and geostatistical inversion,and five configuration models of fluvial sandbodies in Chengdao Oilfield were established. They are separation type and composite superimposed type in vertical and separation type,river bank contact type and cutting and stacking type in lateral. In the vertical direction,the separated channel sandbodies have good connectivity,while composite superimposed sandbodies that are not connected are cut and overlapped between upper and lower layers,with ineffective water injection and rapid produc-tion decrease. In the lateral direction,the separated sandbodies are basically disconnected;the river bank contact sandbodies are poor in connectivity and slow in effectiveness;two-stage channel sand bodies of the cutting and stacking type are partially superimposed,and sandbodies with large cutting and stacking thickness have good connectivity,with quick water injection efficiency,while sandbodies between two single channels with small cutting and stacking thickness have poor connectivity. The results provide a basis for realizing balanced injection and production in oilfields.

关 键 词：河道砂体 叠置模式 波动方程正演 地质统计学反演 馆陶组 埕岛油田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]