Method and apparatus for inverting formation wave impedance using das borehole seismic data
AssigneesChina National Petroleum Corporation, BGP Inc., China National Petroleum Corporation
InventorsYanpeng LI, Zhidong CAI, Fei LI
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Abstract
A method for inverting a formation wave impedance using DAS borehole seismic data, including: acquiring an initial magnitude at a time window after the initial arrival time of seismic wavefield data in a well; mapping the initial magnitude to a relative wave impedance; and correcting the relative wave impedance to obtain an inverted wave impedance. Also provided are an apparatus for inverting a formation wave impedance using DAS borehole seismic data, a device, and a computer-readable storage medium.
Claims20
A method for inverting formation wave impedance using DAS borehole seismic data, comprising:
- obtaining a first arrival amplitude under a time window after a first arrival time of borehole seismic wavefield data, wherein the borehole seismic wavefield data are obtained by using an optical fiber DAS acquisition instrument;
- mapping the first arrival amplitude to relative wave impedance;
- and
- correcting the relative wave impedance to obtain inverted wave impedance.
(canceled)
A device for inverting formation wave impedance using DAS borehole seismic data, comprising a memory, a processor and a computer program stored in the memory and capable of operating on the processor, wherein the processor, when executing the computer program, implements the following steps:
- obtaining a first arrival amplitude under a time window after a first arrival time of borehole seismic wavefield data, wherein the borehole seismic wavefield data are obtained by using an optical fiber DAS acquisition instrument;
- mapping the first arrival amplitude to relative wave impedance;
- and
- correcting the relative wave impedance to obtain inverted wave impedance.
(canceled)
A non-transitory computer readable storage medium, wherein the storage medium stores an instruction, and the instruction, when running on a computer, cause the computer to execute the following steps:
- obtaining a first arrival amplitude under a time window after a first arrival time of borehole seismic wavefield data, wherein the borehole seismic wavefield data are obtained by using an optical fiber DAS acquisition instrument;
- mapping the first arrival amplitude to relative wave impedance;
- and
- correcting the relative wave impedance to obtain inverted wave impedance.
Dependencies are inferred from the claim text.