孔洞结构对超声波衰减特性的影响研究
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摘要
碳酸盐岩地层孔洞形状多样、孔洞空间尺度多变、分布复杂,以首波触发机制记录的波速,反映的是沿着波阻抗最大路径传播的声波速度,不能有效反映岩石中的孔洞结构特征。基于波动理论和有限差分方法,实现超声波透射数值模拟实验,研究孔洞形状、尺寸、分布、密度对声波衰减系数的影响。结果表明:(1)孔洞形状、尺寸、分布、密度对衰减系数均有影响,其中孔洞密度对衰减系数的影响最大,孔洞尺寸次之,孔洞形状和分布对衰减系数的影响较小;(2)垂直于传播方向的孔洞尺寸和平行于传播方向上的孔洞尺寸均对衰减系数有影响,相对而言垂直于传播方向上孔洞尺寸对衰减系数的影响更显著;(3)对一定频率的振源,存在一个临界孔洞尺寸,当孔洞的尺寸大于该临界值时,不能应用衰减系数反映孔隙尺寸的变化;(4)衰减系数与孔洞尺寸、不同孔洞形状的孔隙度之间均表现为幂函数关系,且相关性较好。
For the variety pore shape,the multi-scale pore space and the complex pore distribution in carbonate,The characteristics of the pore and hole structure can't be obtained with the velocity of primary wave,which is the result along the path of the maximum wave impedance. Based on the wave theory and finite difference method,Numerical simulation of ultrasonic transmission has been achieved. And the relation between attenuation factor and the pore shape,size,distribution and density has been studied. According to the study,the conclusion is as follows:(1) Attenuation factor was significantly influence the pore shape,pore size,pore distribution and pore density. And the effect of pore density on the attenuation factor is the most significant. And the pore shape and distribution have less influence on attenuation factor.(2) Whether in the vertical direction or parallel to the propagation direction, pore size have significant influence on the attenuation. And the pore size which perpendicular to the direction of propagation have more influence.(3) For certain frequency vibration source,there is the critical pore size. If the pore size is bigger than the critical size,the changes of pore size cannot be analyzed by the attenuation coefficient.(4) The relationship between attenuation coefficient and pore size,porosity with different pore shapes was expressed as power function with better correlation.
引文
[1]孙龙德,邹才能,朱如凯,等.中国深层油气形成、分布与潜力分析[J].石油勘探与开发,2013,40(6):641–649.(SUN Longde,ZOU Caineng,ZHU Rukai,et al.Formation,distribution and potential of deep hydrocarbon resources in China[J].Petroleum Exploration and Development,2013,40(6):641–649.(in Chinese))
    [2]赵文智,汪泽成,胡素云,等.中国陆上三大克拉通盆地海相碳酸盐岩油气藏大型化成藏条件与特征[J].石油学报,2012,33(增2):1–10.(ZHAO Wenzhi,WANG Zecheng,HU Suyun,et al.Large-scale hydrocarbon accumulation factors and characteristics of marine carbonate reservoirs in three large onshore cratonic basins in China[J].Acta Petrolei Sinica,2012,33(Supp.2):1–10.(in Chinese))
    [3]SALEH A A,CASTAGNA J P.Revisiting the Wyllie time average equation in the case of near-spherical pores[J].Geophysics,2004,69(1):45–55.
    [4]BAECHLE G T,WEGER R,EBERLI G P,et al.The role of macroporosity and microporosity in constraining uncertainties and in relating velocity to permeability in carbonate rocks[C]//Proceedings of the SEG International Exposition and 74th Annual meeting.Denver Colorado:[s.n.],2004:1 662–1 665.
    [5]BAECHLE G T,COLPAERT A,EBERLI G P,et al.Modeling velocity in carbonates using a dual porosity DEM model[C]//Proceedings of the 77th Annual International Meeting,SEG.[S.l.]:[s.n.],2007:1 589–1 592.
    [6]BAECHLE G T,COLPAERT A,EBERLI G P,et al.Effects of microporosity on sonic velocity in carbonate rocks[J].The Leading Edge,2008,27(8):1 012–1 018.
    [7]BAECHLE G T.Effects of pore structure on velocity and permeability in carbonate rocks[Ph.D.Thesis][D].Deutschland:Karls Universitt Tübingen,2009.
    [8]WEGER R J,EBERLI G P,BAECHLE G T,et al.Quantification of pore structure and its effect on sonic velocity and permeability in carbonates[J].American Association of Petroleum Geologists Bulletin,2009,93(10):1 297–1 317.
    [9]AGERSBORG R,JOHANSEN T A,Jakobsen M.The T-matrix approach for Carbonate rocks[C]//Proceedings of the 2005 SEG Annual Meeting,Society of Exploration Geophysicists.[S.l.]:[s.n.],2005:1597–1601.
    [10]SCOTELLARO C,MAVKO G.Factors affecting the sensitivity of the elastic properties to pressure on carbonate rocks[C]//Proceedings of the 2008 SEG Annual Meeting,Society of Exploration Geophysicists.[S.l.]:[s.n.],2008:1665–1668.
    [11]XU S Y,PAYNE M A.Modeling elastic properties in carbonate rocks[J].The Leading Edge,2009,28(1):66–74.
    [12]季敏,魏建新,王尚旭.孔洞物理模型数据的地震响应特征分析[J].石油地球物理勘探,2009,44(2):196–200.(JI Ming,WEI Jianxin,WANG Shangxu.Seismic response characteristics of pore physical model data[J].Oil Geophysical Prospecting,2009,44(2):196–200.(in Chineses))
    [13]KUMAR M,HAN D.Pore shape effect on elastic properties of carbonate rocks[C]//Proceedings of the 2005 SEG Annual Meeting.Society of Exploration Geophysicists.[S.l.]:[s.n.],2005:1 477–1 480.
    [14]曲寿利,朱生旺,赵群,等.碳酸盐岩孔洞型储集体地震反射特征分析[J].地球物理学报,2012,55(6):2 053–2 059.(QU Shouli,ZHU Shengwang,ZHAO Qun,et al.Analysis of seismic reflection characters for carbonate Karst reservoir[J].Chinese Journal of Geophysics,2012,55(6):2 053–2 059.(in Chinese))
    [15]李琼,贺振华,黄德济,等.单孔洞缝模型超声波实验测试与分析[J].石油物探,2007,46(1):100–104.(LI Qiong,HE Zhenhua,HUANG Deji,et al.Test and analysis of ultrasonic experiments on single-hole slit model[J].Geophysical Prospection for Petroleum,2007,46(1):100–104.(in Chinese))
    [16]刘向君,杨超,陈乔,等.孔洞型碳酸盐岩地层超声波实验研究[J].天然气工业,2011,31(8):56–59.(LIU Xiangjun,YANG Chao,CHEN Qiao,et al.An experimental study of ultrasonic waves in vuggy carbonate reservoirs[J].Natural Gas Industry,2011,31(8):56–48.(in Chinese))
    [17]吴俊峰,姚姚,撒利明.碳酸盐岩特殊孔洞型构造地震响应特征分析[J].石油地球物理勘探,2007,42(2):181–185.(WU Junfeng,YAO Yao,SA Liming.Analysis on seismic response of special cavernous structure of carbonate.Oil Geophysical Prospecting,2007,42(2):181–185.(in Chinese))
    [18]陈乔,刘向君,梁利喜,等.裂缝模型声波衰减系数的数值模拟[J].地球物理学报,2012,55(6):2 044–2 051.(CHEN Qiao,LIU Xiangjun,LIANG Lixi,et al.Numerical simulation of attenuation coefficient on fracture model[J].Chinese Journal of Geophysics,2012,55(6):2 044–2 051.(in Chinese))
    [19]SAENGER E H,SHAPIRO S A.Effective velocities in fractured media:a numerical study using the rotated staggered finite-difference grid[J].Geophysical Prospecting,2002,50(2):183–194.
    [20]ALBERT C.REYONLDS.Boundary conditions for the numerical solution of wave propagation problems[J].Geophysics,1978,43(6):1 099–1 110.
    [21]MITCHELL A R,GRIFFITHS D F.The finite difference method in partial differential equations[M].[S.l.]:John Wiley,1980.

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