中东地区鲁卜哈利盆地古生界地震反射构型特征与储层预测
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摘要
根据中东地区鲁卜哈利盆地古生界不同沉积相储集砂体的地震反射构型不同,运用地震资料精细解释与地震沉积学、层序地层学相结合的方法,对盆地东部已钻井区辫状河道和三角洲前缘砂体的沉积特征与地震反射构型特征进行了识别分析;并由此类比到西部地区进行储层预测,在沉积环境相同的T构造区古生界志留系三级基准面旋回TS3下降期,识别出与东部反射特征相似的两套地震反射体,分别预测为辫状河道和三角洲前缘砂体;以此为依据提交的井位建议得到采纳,实钻后证实预测砂体存在。
According to the different seismic reflection configuration characteristics of delta and fluvial reservoirs,seismic data interpretation,and sedimentary and sequence stratigraphic technique are used to analyse and recognize good reservoirs synthetically.In the east part of Rub Al'Khali basin of Middle East area,there exist some typical seismic reflection characteristics of braided channel and delta front sandstone.Based on these characteristics two sand-body reservoirs are recognized in TS3 basic level cycle of Silurian strata in T structure trap area in the west part of Rub Al'Khali basin,which are predicted as braided channel and delta front sandstone respectively.Reservoir,hydrocarbon accumulation and trap conditions show that the Silurian trap of T structure is a potential exploration region.The proposed well location on T structure is accepted and the later drilling result has verified the predicted reservoir sandstones.
According to the different seismic reflection configuration characteristics of delta and fluvial reservoirs,seismic data interpretation,and sedimentary and sequence stratigraphic technique are used to analyse and recognize good reservoirs synthetically.In the east part of Rub Al'Khali basin of Middle East area,there exist some typical seismic reflection characteristics of braided channel and delta front sandstone.Based on these characteristics two sand-body reservoirs are recognized in TS3 basic level cycle of Silurian strata in T structure trap area in the west part of Rub Al'Khali basin,which are predicted as braided channel and delta front sandstone respectively.Reservoir,hydrocarbon accumulation and trap conditions show that the Silurian trap of T structure is a potential exploration region.The proposed well location on T structure is accepted and the later drilling result has verified the predicted reservoir sandstones.
引文
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[2]蔡希源,李思田,郑和荣,等.储层模拟中露头和现代沉积类比的综合研究[M].北京:地质出版社,2004:1-22.
[3]胡宗全.层序地层研究的新思路——构造—层序地层研究[J].现代地质,2004,18(4):551-554.
[4]于兴河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2002:145-183.
[5]陈程,居春荣,邓宏文.江苏黄珏油田戴南组储层结构及合理注采井距[J].现代地质,2004,18(3):366-371.
[6]郑浚茂,游俊,何东博.渤海湾盆地与鄂尔多斯盆地陆相优质储层形成条件对比分析[J].现代地质,2007,21(2):372-386.
[7]游俊,郑浚茂.黄骅坳陷中北区深部储层物性影响因素分析[J].现代地质,1999,13(3):350-354.
[8]苗顺德,冯有良,李秋芬.黄骅坳陷歧口凹陷古近系层序地层格架及其特征分析[J].现代地质,2007,21(4):697-704.
[9]邓宏文,王红亮,闫伟鹏,等.河流相层序地层构成模式探讨[J].沉积学报,2004,22(3):373-378.
[10]邓宏文,王红亮,王居峰,等.层序地层构成与层序控砂、控藏的自相似特征——以三角洲—浊积扇体系为例[J].石油与天然气地质,2004,25(5):491-495.
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