中深层天然气藏地震预测技术研究
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摘要
济阳坳陷天然气资源丰富,已在多个层系发现了不同类型的中深层天然气藏,由于气藏地质条件、地震反射复杂,针对不同的气藏需采用不同的地震预测技术。本文在中深层天然气藏地质特点分析的基础上进行了岩石物理、地震反演、地震属性等预测技术研究,结果表明:中层气藏储层物性较好,储层与围岩的岩石物理参数差异明显,应用亮点、AVO、叠前弹性阻抗反演技术可较好地识别预测三角洲砂岩气藏;针对深层低孔低渗砂岩气藏,地震属性及多属性反演是有效的储层预测技术,并预测了孤北地区二叠系有利储集相带分布,结合构造分析,指出了孤北地区深层气勘探方向。
The natural gas resource is rich in Jiyang despression,and different type gas reservoirs have been discovered in many strata.As the geological condition and seismic reflection are complex,different technique must be adopted to different reservoirs.The research in petrophysics,seismic inversion and seismic attributes shows that the physical feature of the reservoirs in middle layer is good,and can be identified with bright spot,AVO and pe-stack seismic inversion,espetially in belta sand region.Seismic attribute and multiattribute inversion is effective to the predication in deep gas reservoirs with low porosity and permeability.The distribution of reservoirs facies zone in Gubei area is predicted with the method.
The natural gas resource is rich in Jiyang despression,and different type gas reservoirs have been discovered in many strata.As the geological condition and seismic reflection are complex,different technique must be adopted to different reservoirs.The research in petrophysics,seismic inversion and seismic attributes shows that the physical feature of the reservoirs in middle layer is good,and can be identified with bright spot,AVO and pe-stack seismic inversion,espetially in belta sand region.Seismic attribute and multiattribute inversion is effective to the predication in deep gas reservoirs with low porosity and permeability.The distribution of reservoirs facies zone in Gubei area is predicted with the method.
引文
[1]杨显成,刘利.东营凹陷坨—胜—永断裂带天然气成藏条件及富集规律[J].中国海上油气地质,2003,17(2):84-88.
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[6]Connolly P.Elastic impedance[J].The Leading Edge,1999,18(4):438-452.
[7]Debski W and Tarantola A.Information on the elastic parameters obtained from the amplitudes of reflected waves[J].Geophysics,1995,60:1426-1 436.
[8]李红梅.孤北斜坡带煤成气成藏条件分析[J].天然气工业,2006,26(2):23-25.
[2]李庆忠.岩石的纵、横波速度规律[J].石油地球物理勘探,1992,27(1):1-12.
[3]杨云岭,韩文功主编.天然气藏识别与预测技术[M].东营:石油大学出版社,1996.
[4]汪云家,韩文功,王兴谋,等.济阳坳陷中层气藏的地震识别技术[J].石油物探,1997,36(4):16-27.
[5]殷八斤,曾灏.AVO技术的理论与实践[M].北京:石油工业出版社,1995.
[6]Connolly P.Elastic impedance[J].The Leading Edge,1999,18(4):438-452.
[7]Debski W and Tarantola A.Information on the elastic parameters obtained from the amplitudes of reflected waves[J].Geophysics,1995,60:1426-1 436.
[8]李红梅.孤北斜坡带煤成气成藏条件分析[J].天然气工业,2006,26(2):23-25.
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