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    • 5. 发明申请
    • METHOD FOR PASSIVE SEISMIC EMISSION TOMOGRAPHY INCLUDING POLARIZATION CORRECTION FOR SOURCE MECHANISM
    • 被动地震排放测量方法,包括源机构的极化校正
    • WO2011022198A1
    • 2011-02-24
    • PCT/US2010/044183
    • 2010-08-03
    • MICROSEISMIC, INC.
    • THORNTON, Michael, P.EISNER, Leo
    • G01V1/00
    • G01V1/42G01V1/288G01V1/40G01V2210/1234G01V2210/144G01V2210/55G01V2210/65
    • A method for seismic event mapping includes selecting a plurality of subvolumes (VlIl, V112, V113, V121,... V311) representing possible locations of origin of a seismic event in the Earth's subsurface. For each subvolume (VlIl, V112, V113, V121,... V311) a plurality of possible directions of motion (40, 42) of subsurface formations is selected. For each subvolume (VlIl, V112, V113, V121,... V311) and each possible direction of motion (40, 42), polarity correction is applied to seismic signals recorded at a plurality of positions proximate a volume of the Earth's' subsurface to be evaluated. The polarity correction is based on the direction of motion and the position of each seismic sensor with respect to the subvolume. The recorded, polarity corrected seismic signal recordings are time aligned. The time aligned recordings are summed. A most likely direction of motion and subvolume position are determined based on a selected attribute of the summed, time aligned seismic signals.
    • 一种用于地震事件映射的方法包括:选择表示地球地下地震事件原点的可能位置的多个子体积(V111,V112,V113,V121,... V311)。 对于每个子体积(V111,V112,V113,V121,... V311),选择地下地层的多个可能的运动方向(40,42)。 对于每个子体积(V111,V112,V113,V121,... V311)和每个可能的运动方向(40,42),极地校正被应用于记录在靠近地球的地下体积的多个位置处的地震信号 被评估。 极性校正基于运动方向和每个地震传感器相对于子体积的位置。 记录的极性校正的地震信号记录是时间对齐的。 时间对齐的记录被相加。 基于相加的时间对准地震信号的选定属性来确定最可能的运动方向和子体积位置。
    • 6. 发明申请
    • NOISE MODEL ESTIMATION IN MULTI-MEASUREMENT DATA
    • 多测量数据中的噪声模型估计
    • WO2016061293A1
    • 2016-04-21
    • PCT/US2015/055628
    • 2015-10-15
    • WESTERNGECO LLCSCHLUMBERGER CANADA LIMITEDWESTERNGECO SEISMIC HOLDINGS LIMITED
    • KAMIL AMIN, Yousif IzzeldinLOGANATHAN, Pradeep
    • G01V1/16G01V1/22G01V1/30
    • G01V1/30G01V1/187G01V1/366G01V1/3808G01V2210/1423G01V2210/144G01V2210/3248G01V2210/34
    • Various implementations described herein are directed to methods for processing seismic data, including estimating a spectral noise power of multi-measurement seismic data received from a multi-dimensional seismic sensor array having multiple seismic sensors. The methods may include receiving a shot record of multi-measurement seismic data in time-domain, partitioning the shot record into overlapping time-space windows, and computing a frequency-domain spectrum for each time-space window. The methods may include computing a signal presence probability for each time-space window using the frequency-domain spectrum and prior probabilities of signal presence and absence for each time-space window. The methods may include iteratively updating a collective spectral noise power by recursively estimating the spectral noise power of a current time-space window based on the frequency spectrum for the current time-space window, the signal presence probability computed for the current time-space window, and a previously estimated spectral noise power of a previous time-space window.
    • 本文描述的各种实现涉及用于处理地震数据的方法,包括估计从具有多个地震传感器的多维地震传感器阵列接收的多测量地震数据的频谱噪声功率。 这些方法可以包括在时域中接收多测量地震数据的拍摄记录,将拍摄记录划分成重叠的时空窗口,以及计算每个时空窗口的频域频谱。 该方法可以包括使用每个时空窗口的频域频谱和信号存在和不存在的先验概率来计算每个时空窗口的信号存在概率。 这些方法可以包括通过基于当前时空窗口的频谱递归地估计当前时空窗口的频谱噪声功率来迭代地更新总共频谱噪声功率,为当前时空窗口计算的信号存在概率 ,以及先前估计的前一时空窗的频谱噪声功率。