复杂砂岩油藏砂泥岩薄互层储层反演技术及应用
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摘要
塔河油田石炭系薄互层储层具有埋藏深(4800~5400m)、单砂体薄(3~8m)、砂体分布不稳定等特点。地震资料主频范围为35~41Hz,对应反射层砂岩的主体理论分辨率为26~30m,地震数据无法识别薄砂体。为了解决该区石炭系薄砂体预测难题,采用了地层序列约束随机优化反演技术为主、其他方法为辅的储层预测方法,较好地解决了该问题。该方法对当前勘探开发中面临的复杂超深低渗砂泥岩薄互层储层研究具有一定的针对性和适用性。
Carboniferous reservoirs of thin interbeds were buried deeply(4800~5400m)in Tahe Oilfield,single sand body was 3~8mwith unstable sandbody distribution.The main frequency was ranged from 35~41Hz for seismic data,the resolution was 26~30mfor the main theoretical analysis of corresponding reflected sandstone,the thin sandbody was no way to recognized with seismic data.To solve the problem of predicting thin sands in Carboniferous system,the method of stratigraphic sequence of constrained stochastic optimization inversion is used by the supplementation of other methods of reservoir prediction and description method,by which the problem is better solved.The method is applicable and feasible for studying the sandstone thin interbeds with complex geology and ultra-low permeability in current oilfield exploration.
Carboniferous reservoirs of thin interbeds were buried deeply(4800~5400m)in Tahe Oilfield,single sand body was 3~8mwith unstable sandbody distribution.The main frequency was ranged from 35~41Hz for seismic data,the resolution was 26~30mfor the main theoretical analysis of corresponding reflected sandstone,the thin sandbody was no way to recognized with seismic data.To solve the problem of predicting thin sands in Carboniferous system,the method of stratigraphic sequence of constrained stochastic optimization inversion is used by the supplementation of other methods of reservoir prediction and description method,by which the problem is better solved.The method is applicable and feasible for studying the sandstone thin interbeds with complex geology and ultra-low permeability in current oilfield exploration.
引文
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[2]沈财余,崔汝国.影响测井约束地震反演地质效果因素的分析[J].物探与化探,2003,27(2):123~128.
[3]赵晨光.薄互层地震反射特征分析[J].石油地球物理勘探,1986,21(1):32~46.
[4]Huang Xuri,Kelkar M G.Application of combinatorial algorithms to reservoir for description[A].Proceedings of 9th SPE/DOE Im-prove Oil Recovery Meeting[C].Tulsa,1994-04-17~20.
[5]Huang Xuri,Kelkar M G.Seismic inversion using combinatorial algorithm——A hybrid scheme[A].Proceedings of 66thInternationalSEG Annual Conference[C].Denver,1996-11-10~15.
[6]王香文,于常青,董宁,等.储层综合预测技术在鄂尔多斯盆地定北区块的应用[J].石油物探,2006,45(3):267~271.
[7]王元君.塔河油田SD地区石炭系卡拉沙依组薄砂体预测[J].石油物探,2008,47(5):488~493.
[8]陈守田,孟宪禄.薄互层储层预测方法[J].石油物探,2004,43(1):33~36.
[9]沈华,尹微,徐佑平.提高砂岩油藏储层预测精度的方法[J].大庆石油地质与开发,2005,24(3):24~27.
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