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    • 13. 发明申请
    • SEPARATION AND NOISE REMOVAL FOR MULTIPLE VIBRATORY SOURCE SEISMIC DATA
    • 多个振动源地震数据的分离和噪声去除
    • WO2008123920A8
    • 2009-03-26
    • PCT/US2008003599
    • 2008-03-19
    • EXXONMOBIL UPSTREAM RES CONEELAMANI RAMESHKROHN CHRISTINE EKREBS JERRYDEFFENBAUGH MAXANDERSON JOHN
    • NEELAMANI RAMESHKROHN CHRISTINE EKREBS JERRYDEFFENBAUGH MAXANDERSON JOHN
    • G01V1/00
    • G01V1/37G01V1/005G01V2210/127G01V2210/32
    • The invention discloses a way to recover separated seismograms with reduced interference noise by processing vibroseis data recorded (or computer simulated) with multiple vibrators shaking simultaneously or nearly simultaneously (200). A preliminary estimate of the separated seismograms is used to obtain improved seismograms (201). The preliminary estimate is convolved with the vibrator signature and then used to update the seismogram. Primary criteria for performing the update include fitting the field data and satisfying typical criteria of noise-free seismograms (202). Alternative ways to update are disclosed, including signal extraction, modeled noise extraction, constrained optimization based separation, and penalized least-squares based separation. The method is particularly suited for removing noise caused by separating the combined record into separate records for each vibrator, and is advantageous where the number of sweeps is fewer than the number of vibrators (200).
    • 本发明公开了一种通过利用多个振动器同时或几乎同时振动(200)处理记录(或计算机模拟)的震动数据来恢复具有降低的干扰噪声的分离的地震图的方法。 使用分离地震图的初步估计来获得改进的地震图(201)。 初步估计与振动器签名一起卷积,然后用于更新地震图。 执行更新的主要标准包括拟合现场数据并满足无噪声地震图的典型标准(202)。 公开了替代的更新方式,包括信号提取,建模噪声提取,基于约束优化的分离以及基于最小二乘法的惩罚分离。 该方法特别适用于消除由组合记录分离为每个振动器的独立记录而引起的噪声,并且在扫描次数少于振动器数目(200)的情况下是有利的。