Phase modulation and noise minimization for simultaneous vibroseis acquisition
First Claim
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1. A method comprising:
- simultaneously conducting a first seismic sweep with a first seismic source and a second seismic sweep with a second seismic source, different from the first seismic source, at a relative phase offset from the first seismic sweep;
wherein the phase offset varies during the simultaneous sweeping,determining a first phase for the first sweep and second and third phases for the second sweep; and
conducting the first sweep at the first phase while simultaneously conducting the second sweep at the second phase and then, while the first sweep is still being conducted, simultaneously conducting the second sweep at the third phase.
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Abstract
An embodiment of the invention includes simultaneous drive signals whose respective phase angle offset(s) varies over a portion or duration of the simultaneous sweeps. Other embodiments are discussed herein.
11 Citations
20 Claims
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1. A method comprising:
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simultaneously conducting a first seismic sweep with a first seismic source and a second seismic sweep with a second seismic source, different from the first seismic source, at a relative phase offset from the first seismic sweep; wherein the phase offset varies during the simultaneous sweeping, determining a first phase for the first sweep and second and third phases for the second sweep; and conducting the first sweep at the first phase while simultaneously conducting the second sweep at the second phase and then, while the first sweep is still being conducted, simultaneously conducting the second sweep at the third phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An article comprising a non-transitory medium storing instructions that enable a processor-based system to:
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determine first and second drive signals configured to simultaneously drive a first seismic sweep of a first seismic source and a second seismic sweep of a second seismic source, different from the first seismic source, at a relative phase offset from the first seismic sweep; wherein the phase offset varies during the simultaneous sweeping, determine a first phase for the first sweep and second and third phases for the second sweep; and wherein the drive signals are to drive the first sweep at the first phase while simultaneously driving the second sweep at the second phase and then, while the first sweep is still being conducted, simultaneously drive the second sweep at the third phase. - View Dependent Claims (15, 16, 17)
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18. A system comprising:
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a memory; and a processor, coupled to the memory, to determine first and second drive signals configured to simultaneously drive a first seismic sweep of a first seismic source and a second seismic sweep of a second seismic source, different from the first seismic source, at a relative phase offset from the first seismic sweep; wherein the phase offset varies during the simultaneous sweeping, and determine a first phase for the first sweep and second and third phases for the second sweep; and wherein the drive signals are to drive the first sweep at the first phase while simultaneously driving the second sweep at the second phase and then, while the first sweep is still being conducted, simultaneously drive the second sweep at the third phase. - View Dependent Claims (19, 20)
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Specification