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SEISMIC EXPLORATION METHOD

  • US 3,812,457 A
  • Filed: 11/17/1969
  • Issued: 05/21/1974
  • Est. Priority Date: 11/17/1969
  • Status: Expired due to Term
First Claim
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1. A method of seismic exploration, comprising:

  • disposing a plurality of seismic receiving stations at horizontally spaced locations near the surface of the earth, operating said receiving stations to produce earth noise data signals indicative of the amplitudes with time at which acoustic energy appears at a plurality of said station locations during a time period many times greater than the travel time of acoustic energy from the vicinity of said stations to a subterranean reflecting structure and back, subjecting the noise data signals to preprocessing including summing selected groups of said noise data signals to provide signals that are selectively responsive to the energy that emerges along selected directions from locations within the earth, isolated portions of the data signals being adapted to be correlated with each other, the isolated portions representing acoustic energy received at the surface and reflected back down to the subterranean structure then reflected back up to the receiving stations; and

    correlating said isolated portions of the data signals to provide a plurality of correlograms that are adapted to be visually displayed for seismic data analysis and interpretation.

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