Multi-wave AVO responses in fractured tight sandstone
Yang Shuai1, Lu Jun1, Yang Chun2
1. School of Energy, China University of Geosciences(Beijing), Beijing 100083, China; 2. School of Geophysics and Information Technology, China University of Geosciences(Beijing), Beijing 100083, China
Abstract：AVO responses in fractured tight sandstone can provide useful evaluation parameters for tight sandstone reservoirs,which are significant to the petroleum production.Based on Biot-Gassmann's fluid substitution,we build horizontal transversely isotropic (HTI) model equivalent to fractured tight sandstone with Thomsen's weak seismic anisotropy theory,and analyze AVO responses of PP-,PS1-and PS2-waves.Within the 10° incidence angle,the PP-wave reflection coefficient difference between the HTI and isotropic media can be ignored.When the incidence angle is over the 10°,this difference in tight sandstones with different fracture density becomes more obvious and increases with the fracture density.At the 0° and 55° incidence angles,the PS-wave reflection coefficient of the HTI media is close to that of the isotropic media.The AVA-curve polarization reversals of the PP-,PS1-and PS2-waves are different at different fracture density.
罗群.致密砂岩裂缝型油藏的岩心观察描述——以文明寨致密砂岩为例.新疆石油地质,2010,31(3):229-231.Luo Qun.Core observation and description of tight sandstone fractured reservoir:an example from Wenmingzhai tight sandstone.Xinjiang Petroleum Geo-logy,2010,31(3):229-231.
[2]
苏培东,秦启荣,黄润秋.储层裂缝预测研究现状与展望.西南石油学院学报,2005,27(5):14-17.Su Peidong,Qin Qirong and Huang Runqiu.Prospects and status for the study on reservoir fractures.Journal of Southwest Petroleum Institute,2005,27(5):14-17.
[3]
马如辉.致密砂岩储层的裂缝预测.天然气工业,2005,25(10):36-37.Ma Ruhui.Fracture prediction of tight sandstone re-servoir.Natural Gas Industry,2005,25(10):36-37.
[4]
黄绪德,郭正吾.致密砂岩裂缝气藏的地震预测.石油物探,2000,39(2):1-14.Huang Xude,Guo Zhengwu.Seismic prediction of tight-sandstone gas reservoirs.GPP,2000,39(2):1-14.
[5]
金吉能,潘仁芳,朱正平等.致密砂岩气层的弹性阻抗正演模拟研究.石油地球物理勘探,2015,50(2):298-305.Jin Jineng,Pan Renfang,Zhu Zhengping et al.Elastic impedance modeling of tight sandstone gas reservoir.OGP,2015,50(2):298-305.
[6]
王大兴,张盟勃,陈娟等.多波地震技术在致密砂岩气藏勘探中的应用.石油地球物理勘探,2014,49(5):946-953.Wang Daxing,Zhang Mengbo,Chen Juan et al.Application of multi-wave seismic in tight sandstone gas reservoir exploration.OGP,2014,49(5):946-953.
[7]
吴国忱,赵小龙,罗辑等.基于扰动弹性阻抗的裂缝参数反演方法.石油地球物理勘探, 2017,52(2):340-349.Wu Guochen,Zhao Xiaolong,Luo Ji et al.A method for inversion of fracture parameters based on perturbation elastic impedance.OGP,2017,52(2):340-349.
[8]
秦海旭,吴国忱,刘争平.裂缝单斜介质qP波正演模拟方法.石油地球物理勘探,2015,50(6):1118-1126.Qin Haixu,Wu Guochen,and Liu Zhengping.qP wave forward modeling in fracture media with monoclinic symmetry.OGP,2015,50(6):1118-1126.
[9]
杜启振,孔丽云,韩世春.裂缝诱导各向异性双孔隙介质波场传播特征.地球物理学报,2009,52(4):1049-1058.Du Qizhen,Kong Liyun,Han Shichun.Wavefield propagation characteristics in the fracture-induced ani-sotropic double-porosity medium.Chinese Journal of Geophysics,2009,52(4):1049-1058.
[10]
Hudson J A.Wave speeds and attenuation of elastic waves in material containing cracks.Geophysical Journal International,1981,64(1):133-150.
[11]
Hudson J A.A higher order approximation to the wave propagation constants for cracked solid.Geophysical Journal International,1986,87(1):265-274.
Thomsen L.Reflection seismology over azimuthally anisotropic media.Geophysics,1988,53(3):304-313.
[23]
Rüger A.Reflection Coefficients and Azimuthal AVO Analysis in Anisotropic Media.SEG,Tulsa,2002.
[24]
Rüger A and Tsvankin I.Azimuthal variation of AVO response for fractured reservoirs.SEG Technical Program Expanded Abstracts,1995,14:1103-1106.
[25]
Rüger A and Tsvankin I.Using AVO for fracture detection:analytic basis and practical solutions.The Leading Edge,1997,16(10):1429-1434.
[26]
Rüger A.Variation of P-wave reflectivity with offset and azimuth in anisotropic media.Geophysics,1998,63(3):935-947.
[27]
Rüger A.P-ware reflection coefficients for transversely isotropic models with vertical and horizontal axis of symmetry.Geophysics,1997,62(3):713-721.
[28]
Rüger A.Analytic insight into shear-wave AVO for fractured reservoirs.SEG Technical Program Expanded Abstracts,1996,15:159-185.
[29]
Pérez M A,Gibson R L and Toksöz M N.Detection of fracture orientation using azimuthal variation of P-wave AVO responses.Geophysics,1999,64(4):1253-1265.
[30]
Mallick S and Frazer L N.Reflection/transmission coefficients and azimuthal anisotropy in marine seismic studies.Geophysics,1991,56(1):241-252.
[31]
Gray D,Head K.Fracture detection in Manderson field:A 3-D AVAZ case history.The Leading Edge,2000,19(11):1214-1221.
[32]
Hall S A and Kendall J.Fracture characterization at Valhall:application of P-wave amplitude variation with offset and azimuth (AVOA) analysis to a 3D ocean-bottom dataset.Geophysics,2003,68(4):1150-1160.
[33]
乐绍东.AVA裂缝检测技术在川西JM构造的应用.天然气工业,2004,24(1):22-24.Le Shaodong.Application of AVA fracture detection technique in JM structure in West Sichuan Basin.Na-tural Gas Industry,2004,24(1):22-24.
[34]
郝守玲,赵群,周正仁等.EDA介质的P波方位各向异性物理模型的研究.石油地球物理勘探,1998,33(增刊2):54-62.Hao Shouling,Zhao Qun,Zhou Zhengren et al.Research on P-wave azimuth anisotropic physical model of EDA medium.OGP,1998,33(S2):54-62.
[35]
齐宇,魏建新,狄帮让等.横向各向同性介质纵波方位各向异性物理模型研究.石油地球物理勘探,2009,44(6):671-674.Qi Yu,Wei Jianxin,Di Bangrang et al.Compressional wave (P-wave) azimuthal anisotropy physical model studies in transversally isotropic medium.OGP,2009,44(6):671-674.
[36]
杨勤勇,赵群,王世星等.纵波方位各向异性及其在裂缝检测中的应用.石油物探,2006,45(2):177-181.Yang Qinyong,Zhao Qun,Wang Shixing et al.P-wave azimuthal anisotropy and its application in detection of fractures.GPP,2006,45(2):177-181.
[37]
李国发,彭苏萍,何兵寿等.利用三维地震勘探纵波方位振幅随偏移距变化技术检测煤田裂缝.科学通报,2005,50(增刊1):138-142.Li Guofa,Peng Suping,He Bingshou et al.Detection of cracks in coalfields using 3D seismic exploration P-wave azimuth amplitude and offset variation technology.Chinese Science Bulletin,2005,50(S1):138-142.
[38]
王宏伟,彭苏萍,杜文凤等.HTI构造煤方位AVO正演.石油地球物理勘探,2014,49(6):1122-1130.Wang Hongwei,Peng Suping,Du Wenfeng et al.Azimuthal AVO in HTI tectonic coal.OGP,2014,49(6):1122-1130.
[39]
李慧琼,张盟勃,蒲仁海等.黄257井区叠前纵波方位各向异性裂缝分布预测.石油地球物理勘探,2017,52(2):350-359.Li Huiqiong,Zhang Mengbo,Pu Renhai et al.Prediction of anisotropy fracture distribution by pre-stack P-wave in Huang 257 well area.OGP,2017,52(2):350-359.
[40]
印兴耀,刘志国,李春鹏等.裂缝型储层预测的稳定方位AVO梯度无约束反演方法研究.石油物探,2014,53(6):683-691.Yin Xingyao,Liu Zhiguo,Li Chunpeng et al.Fracture formation prediction with a steady azimuth AVO gradient unconstrained inversion method.GPP,2014,53(6):683-691.
[41]
李春鹏,印兴耀,刘志国等.裂缝型储层预测的各向异性梯度反演方法研究.石油物探,2017,56(6):835-840.Li Chunpeng,Yin Xingyao,Liu Zhiguo et al.An anisotropic gradient inversion for fractured reservoir prediction.GPP,2017,56(6):835-840.
[42]
薛娇,顾汉明,蔡成国等.基于等效介质模型的裂缝参数AVOA反演.石油地球物理勘探,2016,51(6):1171-1179.Xue Jiao,Gu Hanming,Cai Chengguo et al.AVOA inversion of fracture parameters based on equivalent medium model.OGP,2016,51(6):1171-1179.
[43]
Biot M A.Theory of propagation of elastic waves in a fluid saturated porous solid:A.Low-frequency range.Journal of the Acoustical Society of America,1956,28(2):168-178.
[44]
Gassmann F.Elastic waves through a packing of spheres.Geophysics,1951,16(4):673-685.
[45]
冯动军,周洪瑞,肖开华等.川西新场地区须二段致密双介质储层特征及有利开发区优选.现代地质,2014,28(3):626-634.Feng Dongjun,Zhou Hongrui,Xiao Kaihua et al.Characteristic of dense dual pore medium reservoir and optimization of the favorable block in the second member of Xujiahe formation in Xinchang area of Western Sichuan.Geoscience,2014,28(3):626-634.
[46]
Levin F K.Seismic velocities in transversely isotropic media.Geophysics,1979,44(5):918-936.
