Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1977-09-06
1980-07-22
Birmiel, Howard A.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
181102, 367 36, 367 57, G01V 112, G01V 120, G01V 134
Patent
active
042142261
ABSTRACT:
Data for use in producing a tomograph of subsoil structure between boreholes is derived by placing spaced geophones in one borehole, and if desired also on the earth surface, and by producing a sequence of shots at spaced apart locations in the other borehole. The signals, detected by each of the geophones from the various shots, are processed either on a time of arrival basis, or on the basis of signal amplitude, to provide information of the characteristics of a large number of incremental areas (pixels) between the boreholes. Such information is useable to produce a tomograph of the subsoil structure between the boreholes. By processing signals of relatively high frequencies, e.g., up to 1000 Hz, and by closely spacing the geophones, a high resolution tomograph can be produced.
REFERENCES:
patent: 2276335 (1942-03-01), Peterson
patent: 2792067 (1957-05-01), Peterson
patent: 2900037 (1959-08-01), Ellis
Bois et al., "Well-to-Well Seismic Measurements," Geophysics, vol. 37, No. 3, Jun. 1972, pp. 471-480.
McDonal et al., "Attenuation of Shear and Compressional Waves in Pierre Shale," Geophysics, vol. 23, No. 3, Jul. 1958, pp. 421-439.
Narasimhan Keshavaiyengar Y.
Nathan Robert
Parthasarathy Shakkottai P.
Birmiel Howard A.
Grifka Wilfred
Manning John R.
Mott Monte F.
The United States of America as represented by the Administrator
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