深水重力流复合下切水道体系精细地质表征与建模——以西非尼日尔三角洲盆地OML130区块为例  

Geological Modeling of Combined Incised-Channel System in Deep-water Sediment Gravity Flow Deposits:A Case of Block OML130 in Niger Delta Basin, West Africa

作　　者：卜范青 张旭 Bu Fanqing;Zhang Xu(Bu Fanqing： MSc,Geology Engineer.Add： CNOOC Research Institute,6 Taiyanggong South Str.,Beijing 100028,China)

机构地区：[1]中海油研究总院

出　　处：《海相油气地质》2018年第2期90-96,共7页Marine Origin Petroleum Geology

基　　金：国家科技重大专项"西非;亚太及南美典型油气田开发关键技术研究"(编号:2011ZX05030-005)资助

摘　　要：尼日尔三角洲盆地新近系深水重力流沉积是西非深水区重要的勘探开发目标,OML130区块AKPO油田A油组主要发育复合水道体系,不同期水道垂向相互叠置,局部下切连通,开展水道储层的精细地质建模对后期开发至关重要。采用"宏观格架、砂组嵌入"两步走的框架搭建思路,再现了A油组七期水道垂向加积和侧向摆动迁移的特征。借助时移地震动态监测信息,拾取水驱区域,准确识别和表征出不同期水道间的下切连通区,形成了一套连通区定量识别的建模方法;通过对深水重力流沉积微相的多条件约束模拟,建立了可靠的沉积微相模型,为后期属性模拟奠定了坚实基础。后期生产动态的验证效果较好,证明这套建模方法具有较高的实用价值。T he deep-water sediment gravity flow deposits in Niger Delta Basin is an important exploration and development target in West Africa. The reservoir group A of AKPO oilfield in Block OML130 is mainly composed of combined incised-channel system. The channels in different periods overlap each other vertically, and they are partially cut and connected, which is very important for oil field development. In view of the above geological characteristics, a modeling framework is adopted to reconstruct the vertical aggradation and lateral swaying. With the help of the information of time-lapse seismic monitoring, the water-flooding area is detected and the connected areas of incised channels are picked out, by which a quantitative identification method is formed for incised area between different channels. Under many restrictive conditions, a reliable model of sedimentary microfacies is established. And the post-production dynamic verification is effective, which proves that the modeling method has a high practical value.

关 键 词：尼日尔三角洲盆地 深水沉积 重力流 复合下切水道 时移地震 地质建模 

分 类 号：TE121.3[石油与天然气工程—油气勘探]