Sun Modle在川东北元坝地区长兴组的应用
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摘要
针对川东北元坝地区长兴组的极薄裂缝性储层采用常规地震资料难以表征的问题,选用Sun Modle岩石物理模型,引入孔隙结构参数γ进行地震反演。在反演剖面上,对于孔隙度低于2%且高渗的极薄裂缝型储层较易识别,具体表现γ参数值在2.5以下。实践证明,基于Sun Modle岩石物理模型处理出孔隙度和孔隙结构参数γ的地震反演剖面,能较好地识别出高孔隙度储层及相对优质的低孔隙度储层。
In Yuanba area,ultra-thin fractured reservoirs of Changxing Formation are hard to be characterized by conventional seismic data.So,in this study,a petrophysical model of Sun is selected to implement seismic inversion withγ,a pore structure parameter.On the inversion profile ofγ,ultra-thin fractured reservoirs with porosity lower than 2%and relatively high permeability are easy to be identified.And the lowerγis below 2.5.Results show that both high-porosity reservoir and low-permeability reservoir with relatively high quality can be discovered using seismic inversion profile of porosity andγobtained by Sun Model.Therefore,the model has certain significance for E&P of Changxing gas reservoirs.
In Yuanba area,ultra-thin fractured reservoirs of Changxing Formation are hard to be characterized by conventional seismic data.So,in this study,a petrophysical model of Sun is selected to implement seismic inversion withγ,a pore structure parameter.On the inversion profile ofγ,ultra-thin fractured reservoirs with porosity lower than 2%and relatively high permeability are easy to be identified.And the lowerγis below 2.5.Results show that both high-porosity reservoir and low-permeability reservoir with relatively high quality can be discovered using seismic inversion profile of porosity andγobtained by Sun Model.Therefore,the model has certain significance for E&P of Changxing gas reservoirs.
引文
[1]马永生,牟传龙,郭旭升.四川盆地东北部长兴期沉积特征与沉积格局[J].地质评论,2006,52(1):25-29.
[2]倪新锋,陈洪德,韦东晓.礁滩复合型气藏物质聚集分布及储层特征研究[M].北京:中国地质出版社,2007:1045-1053.
[3]钱绍瑚.地震勘探[M].武汉:中国地质大学出版社,1989:255-257.
[2]倪新锋,陈洪德,韦东晓.礁滩复合型气藏物质聚集分布及储层特征研究[M].北京:中国地质出版社,2007:1045-1053.
[3]钱绍瑚.地震勘探[M].武汉:中国地质大学出版社,1989:255-257.
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