ACOUSTIC DETERMINATION METHOD OF PERFORATION PARAMETERS AT SECONDARY COMPLETION OF OIL AND GAS WELLS Russian patent published in 2017 - IPC E21B43/11 

FIELD: oil and gas industry.

SUBSTANCE: information noise signal, formed by the perforator discs work, passes along the hydroacoustic channel, it is received, digitized and fed to the correlation filters, to which also the reference acoustic signals are fed: water-steel, water-concrete, water-soil, which represent digitized audio signals of water stream noise, beating on the steel, concrete and soil, and noise of cutting pipes by disks. At the correlation filters outputs there will be the correlation functions, which present peaks, taking the positive values if in the noise signal there is the signal similar to the reference one. Thus, each correlation function corresponds to one of the perforator operation status, and according to the correlation functions spectrum the processes occurring in the well are evaluated.

EFFECT: possibility of well parameters status determination with high-precision at the hydromechanical perforation under the condition of acoustic disturbances if the ratio signal-noise is less than one.

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