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1. 发明授权

US06490528B2 Method for imaging discontinuites in seismic data 有权
标题翻译：地震数据不连续成像方法
公开(公告)号：US06490528B2
公开(公告)日：2002-12-03
申请号：US09827574
申请日：2001-04-06
申请人： Yao-Chou Cheng , Brian P. West , Alan E. Schwartzbard , John A. Farre
发明人： Yao-Chou Cheng , Brian P. West , Alan E. Schwartzbard , John A. Farre
IPC分类号： G01V128
CPC分类号： G01V1/288
摘要： Structural and stratigraphic discontinuities are identified in a 3-D volume of seismic data samples, by first selecting a plurality of directions containing a primary direction and at least one secondary direction. Next, one-dimensional, two-trace first discontinuity values are calculated along the primary direction for each seismic data sample in the 3-D data volume. Next, a series of sequentially less restrictive thresholds is defined, such that a significant portion, preferably at least approximately 10%, of the first discontinuity values satisfy the first threshold. This significant portion of first discontinuity values is then stored in an output discontinuity volume at the corresponding sample locations. The following steps are repeated for each remaining data sample until that sample has a value stored at the corresponding sample location in the output discontinuity volume. First, one-dimensional, two-trace discontinuity values are calculated for the sample sequentially along the secondary directions and the first of the calculated discontinuity values satisfying the first threshold is stored in the output volume. If none of the calculated discontinuity values satisfies the first threshold, then, the next less restrictive threshold in the series of thresholds is selected. Finally, the discontinuity values calculated along the primary and secondary directions are compared sequentially to the selected threshold and the first of the discontinuity values that satisfies the selected threshold is stored in the output discontinuity volume.
摘要翻译：通过首先选择包含主方向和至少一个次方向的多个方向，在3-D体积的地震数据样本中识别结构和地层不连续性。接下来，对于3D数据卷中的每个地震数据样本，沿主要方向计算一维，两迹迹的第一不连续值。接下来，定义一系列顺序上较少限制的阈值，使得第一不连续值的有效部分，优选地至少约10％满足第一阈值。然后将第一不连续值的该重要部分存储在相应采样位置处的输出不连续体积中。对于每个剩余的数据样本重复以下步骤，直到该样本具有存储在输出不连续体积中相应样本位置的值。首先，沿次要方向依次计算样本的一维二迹不连续值，并且将满足第一阈值的所计算的不连续值中的第一个存储在输出体积中。如果计算出的不连续性值都不满足第一阈值，则选择一系列阈值中的下一个较小限制性阈值。最后，将沿主要和次要方向计算的不连续值顺序地与所选择的阈值进行比较，并且满足选择的阈值的第一个不连续值被存储在输出不连续体积中。

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