A new varied continuation step method in seismic migration by phase shift plus interpolation

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Shiyou Diqiu Wuli Kantan (Oil Geophysical Prospecting); (China)

OSTI ID:6914928

Guotian, T ^[1]

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1. Geophysical Survey Team, Geological and Mineral Dept., No. 91 Renmin Road, Xinxian City, Henan Province (China)

In this paper the principle of wave equation migration using phase shift plus interpolation is described briefly. Wave field extrapolation formula in such migration and final imaging equation are properly modified, with downward extrapolation operator redefined, so that the imaging can be achieved by using fast Fourier transform (FFT). A new varied continuation step method is given which is different from usual one in time domain. The new method, which is different from usual varied continuation step method for time domain interpolation in phase shift plus interpolation migration, uses the downward extrapolation continuation step much longer than a quarter of an apparent wave length; therefore, the efficiency of such seismic migration is improved satisfactorily. The processing results of theoretical model, coal field and high dip seismic data show that this new method is a f-k domain migration technique which is economic and suitable to the seismic data collected from the area where there are high dip formations and complicated geological structures.

• OSTI ID: 6914928
• Journal Information: Shiyou Diqiu Wuli Kantan (Oil Geophysical Prospecting); (China), Journal Name: Shiyou Diqiu Wuli Kantan (Oil Geophysical Prospecting); (China) Vol. 27:4; ISSN 1000-7210; ISSN SDWKEP
• Country of Publication: United States
• Language: Chinese

Related Subjects

01 COAL, LIGNITE, AND PEAT
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
COAL DEPOSITS
COAL SEAMS
DATA PROCESSING
EQUATIONS
EXTRAPOLATION
FOURIER TRANSFORMATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
INTEGRAL TRANSFORMATIONS
MINERAL RESOURCES
NUMERICAL SOLUTION
OIL FIELDS
PETROLEUM DEPOSITS
PROCESSING
RESOURCES
SEISMIC SURVEYS
SURVEYS
TRANSFORMATIONS