苏丹Melut盆地扇体识别方法
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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.
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.
引文
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[2]印兴耀,韩文功,李振春等.地震技术新进展.山东东营:石油大学出版社,2006:90～95
[3]董春梅,张宪国,林承焰.有关地震沉积学若干问题的探讨.石油地球物理勘探,2006,41(4):405～409Dong Chunmei,Zhang Xianguo and Lin Chengyan.Discussion on several issues about seismic sedimentolo-gy.OGP,2006,41(4):405～409
[4]Zeng Hongliu,Milo M Backus,Kenneth T Barraw etal.Stratal slicing,partⅠ:Realistic 3Dseismic model.Geophysics,1998,63():502～513
[5]王江,林东成,李鹏等.地层切片技术在复杂勘探区岩相识别中的应用.石油天然气学报,2010,32(6):62～65Wang Jiang,Lin Dongcheng,Li Peng et al.Applicationof stratal slicing in lithofacies identification of complexexploration area.Journal of Oil and Gas Technology,2010,32(6):62～65
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