Gather Optimal Processing and Application Effect of Prestack AVA Instantaneous Inversion
详细信息
- 责任者：Bao Xijie (Research Institute of Exploration and Development ; Daqing Oilfield Company ; PetroChina ; Daqing 163712 ; China)
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2013
- 卷期：20(3)
- 关键词：叠前时间偏移 ; prestack time migration
- 页码：p.282-285
- 图表：illus., 14 refs.
- 分类号：1600
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
Prestack AVA instantaneous inversion has an extensive application in the lithology prediction and hydrocarbon prediction,its accuracy can be easily affected by inversion algorithms as well as much sensitive to the quality of input data.Although seismic exploration has achieved its transition from mainly focus on structure exploration to both structure exploration and lithology exploration,seismic image is still mostly structural imaging at present.It is uncommon to remain dynamic characteristics during the processing with the purpose of seismic reservoir description,and even less to supply the ideal CRP gather which can meet the need of prestack elastic parameters inversion.Based on the application effect of prestack AVA instantaneous inversion,aiming at CRP gather,prestack noise removing,gather flattening and residual energy compensation are focally considered.Methods and processes of prestack CRP gather optimal processing are put forward.The processing effect of gather optimal processing and the effect of the processing on prestack inversion are analyzed from aspects of forward gather,AVO wavelet,signal-noise ratio and inversion residual error.The case history of prestack AVA instantaneous inversion in TN Area of Halaer-Tamtsag Basin has verified that the gather optimal processing improves the CRP gather data quality and the inversion accuracy is improved.Reservoir prediction results show that the CRP gather data of poor-quality CRP gather data will result in a great error in prestack inversion,which affects the reservoir prediction effect of inversion.
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