地震拓频技术在薄层油藏开发动态分析中的应用
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摘要
薄互储层的地震识别和预测是松辽盆地中浅层油气勘探开发中的一大难题。针对薄储层识别问题,本文利用地震拓频技术,即采用高精度宽频带处理和拓频处理联合应用的流程,其中宽频处理技术尽可能将高频弱信号保留下来,而拓频处理主要是增强高频弱信号的能量强度,从而提高地震资料识别薄互储层的能力。本文提出的调谐能量增强法是一项有效的拓频处理技术,该技术在叠后地震资料上,基于地震层序模型,利用薄层调谐理论,通过脉冲约束的自适应增强方式突出薄层反射能量。实际应用效果证实了该技术是薄互层油藏识别的有效手段。
Seismic identification and prediction of thin interbed reservoir is a major problem in shallow oil and gas exploration and development in Songliao Basin. Regarding the problem,a workflow of integration of high precision wide frequency band processing and seismic frequency expanding processing was utilized to improve the thin interbed reservoir identification ability of the seismic data. In the workflow the high precision wide frequency band processing technique tries to keep the weak signal with high frequency,while the seismic frequency expanding processing tries to enhance the energy strength of the weak signal. The tuning energy enhancement method proposed in this paper is an effective seismic frequency expanding processing technique,by using post-stack seismic data and based on seismic sequence model and thin-layer tuning theory,the thin bed reflection energy was enhanced through pulse-constrained adaptive enhancement mode. The field application effects proved that the technique is an effective tool in identification of the thin interbed reservoir.
Seismic identification and prediction of thin interbed reservoir is a major problem in shallow oil and gas exploration and development in Songliao Basin. Regarding the problem,a workflow of integration of high precision wide frequency band processing and seismic frequency expanding processing was utilized to improve the thin interbed reservoir identification ability of the seismic data. In the workflow the high precision wide frequency band processing technique tries to keep the weak signal with high frequency,while the seismic frequency expanding processing tries to enhance the energy strength of the weak signal. The tuning energy enhancement method proposed in this paper is an effective seismic frequency expanding processing technique,by using post-stack seismic data and based on seismic sequence model and thin-layer tuning theory,the thin bed reflection energy was enhanced through pulse-constrained adaptive enhancement mode. The field application effects proved that the technique is an effective tool in identification of the thin interbed reservoir.
引文
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[4]Mullholland J W.Sequence architecture.The Leading Edge,1998,17(6):767～771
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[6]孙夕平,李劲松,郑晓东,张研.调谐能量增强法在石南21井区薄储层识别中的应用.石油勘探与开发,2007,34(6):711～717
[2]Du Shitong.Joint inversion and its application in seis-mic sequence analysis.SEG Technical Program Ex-panded Abstracts,1996,15:1991～1994
[3]Mulholland J W.Sequence stratigraphy:Basic elements,concepts,and terminology,The Leading Edge,1998,17(1):37～42
[4]Mullholland J W.Sequence architecture.The Leading Edge,1998,17(6):767～771
[5]Mushin J A.Formationinterpretation of seismic data.Russian NEDRO,1990
[6]孙夕平,李劲松,郑晓东,张研.调谐能量增强法在石南21井区薄储层识别中的应用.石油勘探与开发,2007,34(6):711～717
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