METHOD OF PLACE DETERMINATION OF DRILL TOOL DURING DRILLING Russian patent published in 2016 - IPC E21B47/09 G01V1/48 

FIELD: oil and gas industry.

SUBSTANCE: using antenna simultaneous synchronous registration of the seismic oscillations excited by the drill tool during drilling is performed. The seismic oscillations are registered using the pressure transmitters of the multi-element hydroacoustic multilinear cable antenna on the sea bed. The transmitter signals are converted to digital form, and are transmitted via the fibre optic cable to the surface data memory and storage system in form of the seismograms. Frequency filtration of signals within several frequency bands is performed. Signals are successively processed in time windows corresponding to the frequency ranges. The spatial filtration of the plane waves is performed, and seismic balance functions are calculated in area under the antenna aperture. Position of noise sources is determined based on the maximum of the seismic balance. Coherent components of the seismograms are calculated for the determined source, and coherent components are calculated based on the seismograms. Data of sources positioning different frequency ranges are integrated, and the well trajectory is determined considering successively determined positions of the drill tool and its total length.

EFFECT: increased accuracy of position determination of the drill tool.

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