Finite-difference migration to zero offset

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/7068849· OSTI ID:7068849

Li, Jianchao

Migration to zero offset (MZO), also called dip moveout (DMO) or prestack partial migration, transforms prestack offset seismic data into approximate zero-offset data so as to remove reflection point smear and obtain quality stacked results over a range of reflector dips. MZO has become an important step in standard seismic data processing, and a variety of frequency-wavenumber (f-k) and integral MZO algorithms have been used in practice to date. Here, I present a finite-difference MZO algorithm applied to normal-moveout (NMO)-corrected, common-offset sections. This algorithm employs a traditional poststack 15-degree finite-difference migration algorithm and a special velocity function rather than the true migration velocity. This paper shows results of implementation of this MZO algorithm when velocity varies with depth, and discusses the possibility of applying this algorithm to cases where velocity varies with both depth and horizontal distance.

• Research Organization: Colorado School of Mines, Golden, CO (United States). Center for Wave Phenomena
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-89ER14079
• OSTI ID: 7068849
• Report Number(s): DOE/ER/14079-13; CWP-122; ON: DE92016281
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
SEISMIC DETECTION
FINITE DIFFERENCE METHOD
ALGORITHMS
CORRECTIONS
MIGRATION
SEISMIC WAVES
VELOCITY
DETECTION
ITERATIVE METHODS
MATHEMATICAL LOGIC
NUMERICAL SOLUTION
422000* - Engineering- Mining & Underground Engineering- (1980-)
990200 - Mathematics & Computers