Method of weighting a trace stack from input traces

Patent · Mon Feb 26 23:00:00 EST 1990

OSTI ID:6894970

Hughes, P A

This patent describes the method of suppressing noise from related seismic traces including noise. It comprises: developing a weighted trace stack, including for each respective one of an ensemble of related input traces for producing respective resulting weighted traces, sampling and squaring each sample of each input trace to produce a time series of corresponding instantaneous power values, transforming said series of instantaneous power values to the frequency domain, thereby producing an energy frequency spectrum, low pass filtering said energy frequency spectrum to form a time varying estimate of the energy of the said input trace, thereby producing a filtered energy frequency spectrum, truncating said filtered energy frequency spectrum for the purpose of decimating the corresponding time function, thereby producing a truncated energy frequency spectrum, transforming the said truncated energy frequency spectrum to the time domain to produce a decimated energy envelope, the sampling interval therefore being at a larger interval than the original digital sampling interval of said input trace, calculating the decimated weight function, and expanding said filtered weight function frequency spectrum to the size of said energy frequency spectrum.

• Assignee: Exxon Production Research Co., Houston, TX
• Patent Number(s): US 4905205; A
• Application Number: PPN: US 7-379488A
• OSTI ID: 6894970
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
BACKGROUND NOISE
CONTROL
EXPLORATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
INHIBITION
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NOISE
NOISE POLLUTION CONTROL
PETROLEUM DEPOSITS
POLLUTION CONTROL
RESOURCES
SEISMIC EFFECTS
SEISMIC SURVEYS
SURVEYS