Strong reflector is widespread in the actual data analysis.The traditional description method of this kind of reservoir is based on certain time window to extract property,reservoir analysis and description directly,which greatly affect the precision of reservoir research.In this paper,with a practical example from Fuyu oil layer (T2) in Punan area of Songliao basin,in combination with the geological situation and drilling and logging data,and through the forward modeling technique,the authors analyzed the causes of T2 strong reflection and influence range.After an analysis of clear formation mechanism,the authors propose a strong reflector influence removing technology based on matching pursuit algorithm,calculation and analysis of actual seismic data.The research results show that,with the elimination of strong reflector effect before seismic attribute extraction,the prediction accuracy of the underlying layer can be greatly improved.
[1] 李延平,陈树民,宋永忠,等.大庆长垣及以东泉三、四段扶杨油层浅水湖泊-三角洲体系沉积特征[J].大庆石油地质与开发,2005,24(5):13-16.
[2] 张明学,王丽静,梁江平,等.松辽盆地头台地区扶余油层沉积特征[J].大庆石油地质与开发,2007,26(6):43-45.
[3] 张美玲,李钰,张士奇,等.卫星油田PⅠ层组基于砂体发育的地震反射模式[J].物探与化探,2012,36(5):728-732.
[4] 李可恩,贺振华,黄德济.高速屏蔽层下弱反射界面的 PS转换波勘探[J].油气地球物理,2007,5(2):21-24.
[5] 王志,贺振华,黄德济,等.高速屏蔽层下弱反射层地震勘探-广角反射[J].勘探地球物理进展,2002,25(5):23-27.
[6] 韩文功,张军华.弱反射地震信号特征及识别方法理论研究[J].石油地球物理勘探,2011,46(2):232-236.
[7] 张在金,张军华,李军,等.煤系地层地震强反射剥离方法研究及低频伴影分析[J].石油地球物理勘探,2016,51(2):383-386.
[8] Thang N,John C.Matching pursuit of two dimensional seismic data and its filtering application[C]//Expanded Abstracts of 70th SEG Annual Internet Meeting,2000.
[9] 张繁昌,李传辉.非平稳地震信号匹配追踪时频分析[J].物探与化探,2011,35(4):546-552.
[10] 刘汉卿,张繁昌,代荣获,等.动态匹配追踪中利用连续相位求取瞬时频率[J].物探与化探,2015,39(1):211-216.
[11] Liu J L,Marfurt K J.Matching pursuit decomposition using Morlet wavelets[C]//Houston:Expanded Abstracts of 75th SEG Annual Internet Meeting,2005:786-79.
[12] 赵颖.小波分析在松辽盆地北部高分辨率层序地层学中的应用[J].物探与化探,2013,37(2):310-313.
[13] 陈涛,张贵宾,索奎,等.不同小波基函数在重力梯度异常正演计算中的应用研究[J].物探与化探,2015,39(s1):91-97.
[14] 王超,沈斐敏.小波变换在探地雷达弱信号去噪中的研究[J].物探与化探,2015,39(2):421-424.
[15] 马见青,李庆春,王美丁.广义S变换在地震勘探中的研究进展[J].物探与化探,2011,35(2):265-269.
