Method for distinguishing between single-phase gas and single-ph

Details Method for distinguishing between single-phase gas and single-ph Method for distinguishing between single-phase gas and single-ph

1976-03-22

1977-09-06

Moskowitz, Nelson

Acoustics

Geophysical or subsurface exploration

Well logging

340 155A, 181102, 73155, G01V 140, E21B 4712

Patent

active

040462200

ABSTRACT:
An acoustic detector is moved through a well to detect sound at various levels within the well. An electrical signal indicative of the detected sound is applied from the acoustic detector by way of a conductor cable to uphole recording equipment including an amplifier, spectrum analyzer, and recorder. The spectrum analyzer provides a frequency spectrum of the amplified signal from the acoustic detector. This frequency spectrum is recorded for use in the identification of flow leaks through or behind the casing of the well in accordance with predetermined spectrum analysis characteristics of single-phase gas and single-phase liquid leaks.

REFERENCES:
patent: 2210417 (1940-08-01), McKinley
patent: 2396935 (1946-03-01), Walstrom
patent: 3509764 (1970-05-01), Baldwin et al.
patent: 3588800 (1971-06-01), Moore
patent: 3816773 (1974-06-01), Baldwin et al.
patent: 3854323 (1974-12-01), Hearn et al.
patent: 3908454 (1975-09-01), Mullins et al.
patent: 3908761 (1975-09-01), Patterson et al.
patent: 3930556 (1976-01-01), Kusuda et al.
McKinley et al., "The Structure and Interpretation of Noise from Flow Behind Cemented Casing," 1972, 12pp, 47th Annu. SPE of AIME Fall Mtg., Preprint No. SPE-3999.

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