岩性油气藏 ›› 2020, Vol. 32 ›› Issue (5): 133142.doi: 10.12108/yxyqc.20200514
刘梦丽, 徐兴荣, 王小卫, 胡书华, 刘金涛
LIU Mengli, XU Xingrong, WANG Xiaowei, HU Shuhua, LIU Jintao
摘要: 相对于纵波勘探,多波地震勘探能够得到更多的地下介质信息,弹性波逆时偏移(Elastic reverse time migration,ERTM)是当前偏移方法中较为精确的方法。最小二乘逆时偏移成像基于反演理论,可为岩性储层评价提供更加保真的高分辨率反射系数成像剖面,成为当前成像方法的研究热点和发展趋势。从建立线性一阶速度-应力弹性波方程出发,应用伴随状态法得到了逆时偏移数据重构算法,并引入最小二乘理论,利用汉森矩阵的逆对梯度进行预处理,实现了预条件弹性介质最小二乘逆时偏移成像算法(Preconditioning elastic least-squares reverse time migration,P-ELSRTM)。在实现算法的基础上,对SEG/EAGE二维盐丘模型进行测试。结果表明:与常规弹性波最小二乘逆时偏移(Elastic leastsquares reverse time migration,ELSRTM)相比,P-ELSRTM成像分辨率更高,保幅性更好,收敛速度更快。另外,P-ELSRTM对含有随机噪音的观测数据适应性更强。
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[1] TENG Y C, DAI T F. Finite-element prestack reverse-time migration for elastic waves. Geophysical Prospecting for Petroleum, 1988, 5(1):1204-1208. [2] SUN R, WANG A. Scalar reverse-time depth migration of prestack elastic seismic data. Geophysics, 2001, 66(5):1519. [3] DUAN Y, SAVA P. Scalar imaging condition for elastic reverse time migration. Geophysics, 2015, 80(4):S127-S136. [4] 刘红伟, 李博, 刘洪, 等. 地震叠前逆时偏移高阶有限差分算法及GPU实现. 地球物理学报, 2010, 53(7):1725-1733. LIU H W, LI B, LIU H, et al. The algorithm of high order finite difference pre-stack reverse time migration and GPU implementation. Chinese Journal of Geophysics, 2010, 53(7):1725-1733. [5] 徐兴荣, 王西文, 王宇超, 等.基于波场分离理论的逆时偏移成像条件研究及应用. 地球物理学进展, 2012, 27(5):2084-2090. XU X R, WANG X W, WANG Y C, et al. Study and application of imaging condition for reverse-time migration based on wave-fields separation. Progress in Geophysics, 2012, 27(5):2084-2090. [6] 陈可洋.逆时成像技术在大庆探区复杂构造成像中的应用. 岩性油气藏, 2017, 29(6):91-100. CHEN K Y. Application of reverse-time migration technology to complex structural imaging in Daqing exploration area. Lithologic Reservoirs, 2017, 29(6):91-100. [7] 陈可洋. 几种地震观测方式的逆时成像分析. 岩性油气藏, 2013, 25(1):95-101. CHEN K Y. Reverse-time migration analysis of several seismic observation models. Lithologic Reservoirs, 2013, 25(1):95-101. [8] CHANG W F, MCMECHAN G A. Reverse-time migration of offset vertical seismic profiling data using the excitation-time imaging condition. Geophysics, 1986, 51(1):139-140. [9] CHANG W F, MCMECHAN G A. Elastic reverse-time migration. Geophysics, 1987, 52(3):243-256. [10] CHANG W F, MCMECHAN G A. 3-D elastic prestack, reversetime depth migration. Geophysics, 1994, 59(4):597-609. [11] 董良国, 郭晓玲, 吴晓丰, 等. 起伏地表弹性波传播有限差分法数值模拟. 天然气工业, 2007, 27(10):38-41. DONG L G, GUO X L, WU X F, et al. Finite difference numerical simulation for the elastic wave propagation in rugged topography. Natural Gas Industry, 2007, 27(10):38-41. [12] 陈可洋. 各向异性弹性介质方向行波波场分离正演数值模拟. 岩性油气藏, 2014, 26(5):91-96. CHEN K Y. Wave field separating numerical simulation of anisotropic elastic medium directional one-way wave. Lithologic Reservoirs, 2014, 26(5):91-96. [13] 王维红, 张伟, 石颖, 等. 基于波场分离的弹性波逆时偏移. 地球物理学报, 2017, 60(7):2813-2824. WANG W H, ZHANG W, SHI Y, et al. Elastic reverse time migration based on wavefield separation. Chinese Journal of Geophysics, 2017, 60(7):2813-2824. [14] 张伟, 石颖. 矢量分离纵横波场的弹性波逆时偏移.地球物理学进展, 2017, 32(4):1728-1734. ZHANG W, SHI Y. Elastic reverse time migration based on vector decomposition of P-and S-wavefields. Progress in Geophysics, 2017, 32(4):1728-1734. [15] 杜启振, 秦童. 横向各向同性介质弹性波多分量叠前逆时偏移. 地球物理学报, 2009, 52(3):801-807. DU Q Z, QIN T. Multicomponent prestack reverse-time migration of elastic waves in transverse isotropic medium. Chinese Journal of Geophysics, 2009, 52(3):801-807. [16] 张晓语, 杜启振, 张树奎, 等.基于一阶弹性波方程的能量互相关成像条件.地球物理学报, 2019, 62(1):289-297. ZHANG X Y, DU Q Z, ZHANG S K, et al. The energy crosscorrelation imaging based on first-order elastic wave equations. Chinese Journal of Geophysics, 2019, 62(1):289-297. [17] 张智, 刘有山, 徐涛, 等.弹性波逆时偏移中的稳定激发振幅成像条件. 地球物理学报, 2013, 56(10):3523-3533. ZHANG Z, LIU Y S, XU T, et al. A stable excitation amplitude imaging condition for reverse time migration in elastic wave equation. Chinese Journal of Geophysics, 2013, 56(10):3523-3533. [18] 王华忠, 王雄文, 王西文. 地震波反演的基本问题分析. 岩性油气藏, 2012, 24(6):1-9.WANG H Z, WANG X W, WANG X W. Analysis of the basic problems of seismic wave inversion. Lithologic Reservoirs, 2012, 24(6):1-9. [19] 任浩然, 王华忠, 黄光辉. 地震波反演成像方法的理论分析与对比. 岩性油气藏, 2012, 24(5):12-18. REN H R, WANG H Z, HUANG G H. Theoretical analysis and comparison of seismic wave inversion and imaging methods. Lithologic Reservoirs, 2012, 24(5):12-18. [20] 李庆洋, 黄建平, 李振春. 基于Student's t分布的不依赖子波最小二乘逆时偏移. 地球物理学报, 2017, 60(12):4790-4800. LI Q Y, HUANG J P, LI Z C. Source-independent least-squares reverse time migration using student's t distribution. Chinese Journal of Geophysics, 2017, 60(12):4790-4800. [21] NEMETH T, WU C, SCHUSTER G T. Least-squares migration of incomplete reflection data. Geophysics, 1999, 64(1):208-221. [22] LI C, HUANG J P, LI Z C, et al. Regularized least-squares migration of simultaneous-source seismic data with adaptive singular spectrum analysis. Petroleum Science, 2017, 1(14):61-74. [23] 李振春, 李闯, 黄建平, 等. 基于先验模型约束的最小二乘逆时偏移方法. 石油地球物理勘探, 2016, 51(4):738-744. LI Z C, LI C, HUANG J P, et al. Regularized least-squares reverse time migration with prior model. Oil Geophysical Prospecting, 2016, 51(4):738-744. [24] 李闯, 黄建平, 李振春, 等. 预条件最小二乘逆时偏移方法. 石油地球物理勘探, 2016, 51(3):513-520. LI C, HUANG J P, LI Z C, et al. Preconditioned least-squares reverse time migration. Oil Geophysical Prospecting, 2016, 51(3):513-520. [25] 刘梦丽, 黄建平, 李闯, 等. 基于角度滤波成像的最小二乘逆时偏移. 石油地球物理勘探, 2018, 53(3):469-477. LIU M L, HUANG J P, LI C, et al. Least-squares reverse time migration based on the angular filtering imaging condition. Oil Geophysical Prospecting, 2018, 53(3):469-477. [26] DAI W, BOONYASIRIWAT C, SCHUSTER G T. Multi-source least-squares reverse time migration. Geophysical Prospecting, 2012, 60(4):681-695. [27] DAI W, SCHUSTER G T. Plane-wave least-squares reversetime migration. Geophysics, 2013, 78(4):S165-S177. [28] 黄建平, 曹晓莉, 李振春, 等.最小二乘逆时偏移在近地表高精度成像中的应用. 石油地球物理勘探, 2014, 49(1):107-112. HUANG J P, CAO X L, LI Z C, et al. Least square reverse time migration in high resolution imaging of near surface. Oil Geophysical Prospecting, 2014, 49(1):107-112. [29] 李振春, 郭振波, 田坤. 黏声介质最小平方逆时偏移. 地球物理学报, 2014, 57(1):214-228. LI Z C, GUO Z B, TIAN K. Least-squares reverse time migration in visco-acoustic media. Chinese Journal of Geophysics, 2014, 57(1):214-228. [30] GU B L, LI Z C, YANG P, et al. Elastic least-squares reverse time migration with hybrid l1/l2 misfit function. Geophysics, 2017, 82(3):S271-S291. [31] REN Z M, LIU Y, SEN M K. Least-squares reverse time migration in elastic media. Geophysical Journal International, 2017, 208(2):1103-1125. [32] LI C, GAO J, GAO Z, et al. Periodic plane-wave least-squares reverse time migration for diffractions. Geophysics, 2020, 85(4):S185-S198. [33] LI C, GAO J, WANG R, et al. Enhancing subsurface scatters using reflection-damped plane-wave least-squares reverse time migration. IEEE Geoence and Remote Sensing Letters, 2020, 17(4):706-710. [34] YANG J D, ZHU H J. Viscoacoustic least-squares reverse-time migration using a time-domain complex-valued wave equation. Geophysics, 2019, 84(5):1-130. [35] 郭旭, 黄建平, 李振春, 等. 基于一阶速度-应力方程的VTI介质最小二乘逆时偏移. 地球物理学报, 2019,62(6):2188-2202. GUO X, HUANG J P, LI Z C, et al. Least-squares reverse time migration based on first-order velocity-stress wave equation in VTI media. Chinese Journal of Geophysics(in Chinese), 2019, 62(6):2188-2202. |
[1] | 王 靖,孙赞东,吴 杰,苏 勤,臧胜涛. 地震资料处理方法的叠前保幅性研究[J]. 岩性油气藏, 2016, 28(3): 105-112. |
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