用频率衰减属性预测庆深气田火山岩储层含气性
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摘要
近年来,随着石油地球物理技术的不断发展和完善,使得利用地震信息中的频率衰减属性预测储层的含气性成为可能。针对松辽盆地庆深气田火山岩储层的特殊地质条件,利用基于模型的参量法估算地震频谱,通过对比穿过目的层前后有效频带中不同频率成分的衰减情况来定性分析目的层内部的流体分布,进而预测了庆深气田下白垩统营城组一段火山岩储层有利含气区的分布情况,其符合率可达85%,取得了良好的应用效果,实现了对火山岩含气性的有效检测。
In recent years,the continuous development of geophysical exploration technologies has made it possible to predict gas potential of reservoirs by using the frequency attenuation of seismic data.In view of the unique geologic conditions of the volcanic reservoirs in the Qingshen gas field,Songliao Basin,the model-based parametric method was used to estimate the seismic spectrum.Attenuations of different frequency components in the effective frequency band before and after propagating through the targets were compared to qualitatively analyze fluid distribution in the target interval.This method was used to predict the distribution of the favorable gas bearing volcanic reservoirs in the first member of the Lower Cretaceous Yingcheng Formation in the Qingshen gas field.The coincidence rate of the prediction results is up to 85%,and the gas potential of the volcanic reservoirs has been effectively detected.
In recent years,the continuous development of geophysical exploration technologies has made it possible to predict gas potential of reservoirs by using the frequency attenuation of seismic data.In view of the unique geologic conditions of the volcanic reservoirs in the Qingshen gas field,Songliao Basin,the model-based parametric method was used to estimate the seismic spectrum.Attenuations of different frequency components in the effective frequency band before and after propagating through the targets were compared to qualitatively analyze fluid distribution in the target interval.This method was used to predict the distribution of the favorable gas bearing volcanic reservoirs in the first member of the Lower Cretaceous Yingcheng Formation in the Qingshen gas field.The coincidence rate of the prediction results is up to 85%,and the gas potential of the volcanic reservoirs has been effectively detected.
引文
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[9]RAMIREZ-CRUZ L C,VALLE-GARCIA R D,FUCU-GAUCHI J U.Enhanced oil production in a mature field assisted by spectra attenuation analysis[J].Journal of Geophysics and Engineering,2005(2):48-53.
[2]曲延明,舒萍,纪学雁,等.松辽盆地庆深气田火山岩储层的微观结构研究[J].吉林大学学报:地球科学版,2007,37(4):721-725.
[3]邵英梅,冯子辉.徐家围子断陷营城组火山岩岩石学及地球化学特征[J].大庆石油地质与开发,2007,26(4):27-30.
[4]闫林,周雪峰,高涛.徐深气田兴城开发区火山岩储层发育控制因素分析[J].大庆石油地质与开发,2007,26(2):9-14.
[5]舒萍,纪学雁,丁日新,等.徐深气田火山岩储层的裂缝特征研究[J].大庆石油地质与开发,2008,27(1):13-17.
[6]闫林,周雪峰,高涛等.徐深气田兴城开发区火山岩储层次生溶蚀孔隙研究[J].天然气工业,2007,27(8):16-19.
[7]毕研斌,龙胜祥,郭彤楼,等.应用频率衰减属性预测TNB地区储层含气性[J].石油与天然气地质,2007,28(1):116-120.
[8]边树涛,董艳蕾,郑浚茂.地震波频谱衰减检测天然气技术应用研究[J].石油地球物理勘探,2007,42(3):296-300.
[9]RAMIREZ-CRUZ L C,VALLE-GARCIA R D,FUCU-GAUCHI J U.Enhanced oil production in a mature field assisted by spectra attenuation analysis[J].Journal of Geophysics and Engineering,2005(2):48-53.
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