苏丹Melut盆地扇体识别方法  

Identifying fan-shaped lithosomic bodies in Melut Basin,Sudan

作　　者：张远银[1,2] 王天奇[3] 苏玉平[3] 孙赞东[1,2] 方乐华[3] 史忠生[3] 何巍巍[3] 白洁[3] 

机构地区：[1]中国石油大学地质地球物理综合研究中心,北京102249 [2]中国石油大学油气资源与探测国家重点实验室,北京102249 [3]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《石油地球物理勘探》2012年第A01期35-39,164-165+162,共5页Oil Geophysical Prospecting

摘　　要：本文利用测井相识别、地震相分析、密度反演、三维可视化和地层切片等技术对Melut盆地北部凹陷的扇体进行识别,确定了其展布范围,发现该扇体发育在北部凹陷东部控凹断裂下降盘一侧,且呈裙带状分布;由凹陷西侧向着东部大断裂方向,砂岩含量逐渐增高,在东部大断裂附近,砂岩含量达到最大值,说明物源方向是自东向西。按以上认识部署的3井的钻探结果证实上述预测的可靠性。Fan-shaped lithosomic bodies in the northern sag of Melut Basin were identified and its distribution range were determined by application of series technologies including electrofacies,seismic facies,density inversion,3D visualization,and strata slice.The fan-shaped lithosomic bodies developed in the downthrow side of the boundary fault in the east that controlled the deposition of the northern sag,and they were shaped like waistband.Seismic inversion results show that sand content increased gradually from the west of the northern sag to the east of the major boundary faults and the maximum sand content is located near the major faults.This means the major provenance came from east.The above conclusion was approved by 3 exploration wells drilled based on the above prediction.

关 键 词：裂谷盆地 扇体 地震相分析 地层切片 密度反演 

分 类 号：P631[天文地球—地质矿产勘探]