Enforcing smoothness and assessing uncertainty in non‐linear one‐dimensional prestack seismic inversion
Enforcing smoothness and assessing uncertainty in non‐linear one‐dimensional prestack seismic inversion
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DOI：
10.1111/j.1365-2478.2006.00531.x
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发表时间：
2006-05
影响因子：
2.6
通讯作者：
O. J. Varela;C. Torres‐Verdín;Mrinal K. Sen
中科院分区：
文献类型：
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作者：
O. J. Varela;C. Torres‐Verdín;Mrinal K. Sen
从地面地震振幅测量中估计岩层的弹性性质仍然是油气藏勘探和开发的感兴趣的主题。本文开发了一种全球反演技术，用于从正常时差校正的PP叠前地面地震振幅测量值估计和评价纵波速度、横波速度和体积密度的一维分布。具体目标是：（a）评估最小化算法（B）的效率，以评估各种数据失配函数的影响，以及（c）评估由反演实施的平滑度标准的程度和类型的影响。数值实验表明，非常快速的模拟退火是最有效的最小化技术之间的替代方法考虑全局反演。它也被发现，一个适当的数据失配函数的选择是必要的噪声和稀疏的地震振幅测量的可靠和有效的匹配。几个程序被认为是强制执行的弹性参数，包括预定义的长度，平整度和粗糙度的二次测量的估计的1D分布的平滑度。
Estimation of elastic properties of rock formations from surface seismic amplitude measurements remains a subject of interest for the exploration and development of hydrocarbon reservoirs. This paper develops a global inversion technique to estimate and appraise 1D distributions of compressional‐wave velocity, shear‐wave velocity and bulk density, from normal‐moveout‐corrected PP prestack surface seismic amplitude measurements. Specific objectives are: (a) to evaluate the efficiency of the minimization algorithm (b) to appraise the impact of various data misfit functions, and (c) to assess the effect of the degree and type of smoothness criterion enforced by the inversion. Numerical experiments show that very fast simulated annealing is the most efficient minimization technique among alternative approaches considered for global inversion. It is also found that an adequate choice of data misfit function is necessary for a reliable and efficient match of noisy and sparse seismic amplitude measurements. Several procedures are considered to enforce smoothness of the estimated 1D distributions of elastic parameters, including predefined quadratic measures of length, flatness and roughness.