长北气田辫状河三角洲单砂体时空建模  

Time-space simulation on braid river delta single sand-body of Changbei Gasfield

作　　者：周祺[1] 郑荣才[1] 王华[2] 李凤杰[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]长庆油田分公司长北项目部,陕西西安710021

出　　处：《大庆石油地质与开发》2008年第5期10-13,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：地质统计学的研究对象是区域化变量,而区域化变量具有随机性的特点,因此,随机模拟就是用具有随机性的数学模型拟合地质现象或地质过程的区域化变量。为展示不同时期砂体发育情况与空间展布,将序贯指示模拟法与高分辨率层序地层划分方案相结合,以超短期旋回层序的单砂体为等时地层单元,对鄂尔多斯盆地长北气田山西组2段各超短期旋回层序的辫状河三角洲水上分流河道,水下分流河道及河口坝微相的单砂体的时空展布进行了随机模拟。小尺度单元的砂体时空建模结果表明,河道沿沉积物源方向由北向南展布,砂体最发育时期为相当SSSC2—SSSC8超短期基准面上升时期的河道,具有加宽,沉积厚度加大,物性好等有利储层发育的特点,而下降时期河道变窄,沉积厚度减小。单砂体的时空模拟结果在该区勘探实践中得到了很好的验证。Geological statisties works on regional variable and regional variable has random feature. Random simulation is a method that uses random mathematics model imitates geological phenomenon or geological procession＇ s regional variable. In order to show sand-body＇ s growth cires and space exhibition on different time, combines sequence indicator simulation and high resolution sequence stratigraphie feature dividing scheme together, take super short sequence baselevel as isoehronous stratum unit, carries on random simulation in Shanxin 2 member formation super short base-level＇ s braid river delta distributarv channels, submerged distributary channels and river mouth bars sand-body space exhibition in Changbei Gasfield, Ordos Basin. Small scale unit time-space exhibition simulation result shows main channel flows from north to south and SSSC2-SSSC8 super short base-level＇ s ascending phase is the best phase to sand-body＇ s growth, channel begins to broad in ascending phase and grows thickness sand-body, it begins to nan＇ow in descending phase. This area＇ s single sand-body time-space simulation results get a good validation according to actual exploration.

关 键 词：序贯指示模拟 高分辨率层序地层 时空建模 长北气田 山西组 鄂尔多斯盆地 

分 类 号：TE319[石油与天然气工程—油气田开发工程]