叠前弹性波阻抗反演技术在赤道几内亚X区块储层预测中的应用
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摘要
赤道几内亚X区块水深100～2 000 m,寻找好的深水浊积砂岩储层是X区块急待解决的一个难题。根据已钻井岩石物理统计分析,基于纵波阻抗与纵横波速度比(Vp/Vs)交汇方式可以有效区分孔隙度较高的砂岩储层,提出了地震相分析结合叠前弹性波阻抗反演技术对区块A目标储层的发育情况进行了预测和精细刻画,认为A目标具有低纵横波速度比的特征,平面呈扇形分布,推测其为一套深水扇浊积砂岩,后经钻探证实了这一认识。该方法的成功应用对西非深水浊积砂岩储层预测具有一定的借鉴意义。
Water depth of block X in Equatorial Guinea is from 100 to 2000 meter,the problem of looking for deep-water turbidite sandstone reservoir needs to be solved for X block.According to the statistical analysis of the drilled wells,good porosity reservoir can be distinguished by intersection of V_p/V_s and P wave impedance,therefore seismic facies analysis and prestack elastic wave impedance inversion technique were put forward to predict and fine engrave reservoir of prospect A.Reservoir of prospect A has low V_p/V_s characteristics,and its plane distribution has fan-shaped,and was surmised as deep-water fan turbidite sandstone,which was proved by the drilling well A - 1.The successful application of this method has some reference to West Africa deep-water turbidite sandstone reservoir prediction.
Water depth of block X in Equatorial Guinea is from 100 to 2000 meter,the problem of looking for deep-water turbidite sandstone reservoir needs to be solved for X block.According to the statistical analysis of the drilled wells,good porosity reservoir can be distinguished by intersection of V_p/V_s and P wave impedance,therefore seismic facies analysis and prestack elastic wave impedance inversion technique were put forward to predict and fine engrave reservoir of prospect A.Reservoir of prospect A has low V_p/V_s characteristics,and its plane distribution has fan-shaped,and was surmised as deep-water fan turbidite sandstone,which was proved by the drilling well A - 1.The successful application of this method has some reference to West Africa deep-water turbidite sandstone reservoir prediction.
引文
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[10]王军,周东红,张中巧,等.叠前弹性波阻抗反演在流体检测中的应用——以渤海海域QHD29-2区块为例[J].石油物探,2011,50(5):475-486. WANG Jun,ZHOU Dong-hong,ZHANG Zhong-qiao,et al.Application of prestack elastic wave impedance inversion technique in the fluid dection of QHD 29-2 area in Bohai Sea[J].Geophysical Prospecting Petroleum,2011,50(5):475 - 486.
[2]肖思和,李曙光.许多,等.叠前阻抗反演在储层预测中的应用[J].物探化探计算技术,2010,32(9):476-479. XIAO Si-he,LI Shu-guang,XU Duo,et al.Application of prestack elastic impedance inversion to reservoir prediction[J]. Computing Techniques for Geophysical and Geochemical Exploration,2010,32(9):476 -479.
[3]李国福,苏云,黄倩.弹性波阻抗反演技术的应用[J].岩性油气藏,2010,22(12):80-84. LI Guo-fu,SU Yun,HUANG Qian.Application of elastic wave impedance inversion technique[J].Lithologic Reservoirs, 2010,22(12):80-84.
[4]郭栋,吴国忱.基于弹性波阻抗理论的岩性参数提取方法及应用[J].油气地球物理,2008,6(1):16-20. GUO Dong,WU Guo-chen.The method and application of lithology parameter extraction based on elastic wave impedance []].Petroleum Geophysics,2008,6(1):16 -20.
[5]曹孟起,王九拴,邵林海.叠前弹性波阻抗反演技术及应用[J].石油地球物理勘探,2006,41(6):323-326. CAO Meng-qi,WANG Jiu-shuan,SHAO Lin-hai.Prestack elastic wave impedance inversion technique and application[J].Oil Geophysical Prospecting,2006,41(6):323 -326.
[6]Whitcombe D N.Extended elastic impedance for fluid and lithology prediction[J].Geophysics,2002,67(1):63 -67.
[7]张奎,倪逸.三种弹性波阻抗公式比较[J].石油地球物理勘探,2006,41(9):7-10. ZHANG Kui,NI Yi.Comparison among three elastic wave impedances formulas[J].Oil Geophysical Prospecting,2006,41 (9):7-10.
[8]王保丽,印兴耀,张繁昌.基于Gray近似的弹性波阻抗方程及反演[J].石油地球物理勘探,2007,42(4):435-439. WANG Bao-li,YIN Xing-yao,ZHANG Fan-chang.Gray approximation-based elastic wave impedance equation and inversion [J].Oil Geophysical Prospecting,2007,42(4):435 -439.
[9]刘伟,曹思远.基于地震资料的三种岩性流体预测方法对比分析[J].地球物理学进展,2008,23(6):1 918-1 923. LIU Wei,CAO Si-yuan.Comparison and analysis of three fluid identification technologies based on seismic data[J].Progress in Geophysics,2008,23(6):1 918 - 1 923.
[10]王军,周东红,张中巧,等.叠前弹性波阻抗反演在流体检测中的应用——以渤海海域QHD29-2区块为例[J].石油物探,2011,50(5):475-486. WANG Jun,ZHOU Dong-hong,ZHANG Zhong-qiao,et al.Application of prestack elastic wave impedance inversion technique in the fluid dection of QHD 29-2 area in Bohai Sea[J].Geophysical Prospecting Petroleum,2011,50(5):475 - 486.
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