Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-refraction type
Patent
1975-02-24
1980-06-10
Birmiel, Howard A.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-refraction type
367 56, 367 59, 367 68, 367 81, 181106, G01V 120, G01V 128
Patent
active
042076196
ABSTRACT:
Disclosed is a seismic data gathering system for use in well drilling operations. A seismic pulse generator may be placed in the drill string near the drill bit and advanced in the well for generation of seismic pulses at any depth. An array of seismometers, rotationally symmetric about the well, may be arranged at the surface to detect both pulses refracted above the seismic pulse generator and pulses reflected at interfaces below the generator. According to the method of the invention, the refracted and reflected seismic pulse data may be reduced and analyzed to determine the drilling direction of the drill bit, the lithology through which the drill is passing, the position and approximate shape of nearby oil or gas reservoirs otherwise missed, and to look ahead of the drill bit to determine geologic conditions in advance of the drilling.
REFERENCES:
patent: 2933144 (1960-04-01), Scott et al.
patent: 3817345 (1974-06-01), Bailey
patent: 3845837 (1974-11-01), McEvers, Jr. et al.
"An Approximate Correction Method for Refraction in Reflection Seismic Prospecting," Krey, Geophysics, vol. 16, No. 3, Jul. 1951, pp. 468-485.
Berryhill Bill B.
Birmiel Howard A.
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