| 摘要 |
A method of seismic prospecting involving at least a first and second spaced apart vibratory sources, cotemporaneously vibrating with the same or different reference signals, and recording into a common geophone at a point distant from both sources. The method involves recording at least two records, one record includes the first vibrator V1 responsive to a first reference signal R1 and the second vibrator V2 responsive to a second reference signal R2. In the second record the second vibrator repeats the reference signal R2, while the first vibrator is responsive to the first reference signal R1, but in opposite phase, -R1. When the two received records are added, the components due to the first vibrator are in opposite phase or polarity, and cancel, leaving only the part due to the second vibrator. When the two records are subtracted, the part due to the second vibrator cancels, and all that remains is the part due to the first vibrator.
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