3D-3C地震资料处理方法在SLG气区的应用
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摘要
利用转换波(P-SV)的传播速度比纵波低,传播不受孔隙流体的影响,传播规律和纵波有较大的区别,可以进行有效的油气识别。针对鄂尔多斯盆地储层以陆相中的三角洲平原分流河道砂体为主,储层分布变化大,横向上低孔低渗,储层物性的非均质性比较强,P-SV波资料处理与P波资料处理有一些差异的特征,对SLG气区实际3D-3C地震资料处理中的转换波静校正问题、共转换点(CCP)道集抽取方法、转换波的速度分析方法、动校正方法及转换波和纵波比例压缩方法等进行了研究,建立了3D-3C地震资料处理方法和技术,并取得了良好的应用效果,可以将该方法在实际生产中推广应用。
Converted shear wave (P-SV) has lower velocity than P wave and its propagation is not influenced by pore fluid.The propagation regularity of converted wave is very different from that of P wave and this difference can be used to effectively identify oil-gas.The reservoirs are mainly sandstone bodies of deltaic plain distribution channel in Ordos Basin and its distribution changes rapidly with low pore and low permeability laterally.Heterogeneity of reservoir physical property is apparent.In processing of real 3D converted wave seismic data in SLG gas province,researches are concluded in static sorting of common converted point (CCP) gathering,velocity analysis,NMO,etc..The 3C-3D seismic data processing flow chart is finally built and it is suggested that this processing flow chart may be widely used in converted shear wave seismic data processing.
Converted shear wave (P-SV) has lower velocity than P wave and its propagation is not influenced by pore fluid.The propagation regularity of converted wave is very different from that of P wave and this difference can be used to effectively identify oil-gas.The reservoirs are mainly sandstone bodies of deltaic plain distribution channel in Ordos Basin and its distribution changes rapidly with low pore and low permeability laterally.Heterogeneity of reservoir physical property is apparent.In processing of real 3D converted wave seismic data in SLG gas province,researches are concluded in static sorting of common converted point (CCP) gathering,velocity analysis,NMO,etc..The 3C-3D seismic data processing flow chart is finally built and it is suggested that this processing flow chart may be widely used in converted shear wave seismic data processing.
引文
[1]牛滨华,孙春岩.半空间介质与地震波传播[M].北京:石油工业出版社,2002.
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[6]Cary P W,Eaton D W S.A simple method for resolvinglarge converted-wave(P-SV)statics[J].Geophysics,1993,58(3):429-433.
[7]唐建侯,张金山.消除P-SV波大静校正量的方法[J].石油地球物理勘探,1994,29(5):650-653.
[8]李彦鹏,谷跃民.利用上行透射转换波计算横波静校正量[C].国际地球物理会议论文集,CPS/SEG2004:114-116.
[9]黄中玉.多分量勘探技术[J].勘探地球物理进展,2003,26(5-6):413-422.
[10]郭向宇,凌云,魏修成.PS转换波共转换点的几种计算方法及实际应用[J].石油物探,2002,41(2):141.
[11]郭桂红,王德利,何樵登,等.转换波的静校正[J].吉林大学学报,2003,33(4):542-544.
[12]王紫娟,刘德威.VSP与3D地震资料的联合处理[J].石油物探,1995,34(2):16-25.
[13]Dai H.Integrative analysis of anisotropy parameter and forps converted-wave[C]//73rd SEG Meeting,ExpandedAbstracts.USA Dalas:SEG Mtg,2003:1577.
[2]Stewart R R,Gaiser J E,Brown R J,et al.Coverted-waveseismic exploration[J].Geophysics,2003,68(1):40.
[3]李录明,罗省贤.多波多分量地震勘探原理及数据处理方法[M].四川成都:成都科技大学出版社,1997.
[4]刘洋.我国陆上转换波质量评价[J].石油地球物理勘探,2002,37(2):191-195.
[5]詹正彬,姚姚.多分量地震和横波勘探[M].北京:地质出版社,1993.
[6]Cary P W,Eaton D W S.A simple method for resolvinglarge converted-wave(P-SV)statics[J].Geophysics,1993,58(3):429-433.
[7]唐建侯,张金山.消除P-SV波大静校正量的方法[J].石油地球物理勘探,1994,29(5):650-653.
[8]李彦鹏,谷跃民.利用上行透射转换波计算横波静校正量[C].国际地球物理会议论文集,CPS/SEG2004:114-116.
[9]黄中玉.多分量勘探技术[J].勘探地球物理进展,2003,26(5-6):413-422.
[10]郭向宇,凌云,魏修成.PS转换波共转换点的几种计算方法及实际应用[J].石油物探,2002,41(2):141.
[11]郭桂红,王德利,何樵登,等.转换波的静校正[J].吉林大学学报,2003,33(4):542-544.
[12]王紫娟,刘德威.VSP与3D地震资料的联合处理[J].石油物探,1995,34(2):16-25.
[13]Dai H.Integrative analysis of anisotropy parameter and forps converted-wave[C]//73rd SEG Meeting,ExpandedAbstracts.USA Dalas:SEG Mtg,2003:1577.
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