Reef structure determined from vertical seismic profiling

Conference · Fri Aug 01 04:00:00 EDT 1986 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:7041811

Blackway, C V; Keho, T; Turpening, R M; Omnes, G

MIT has access to a test borehole near a producing (Silurian) reef in Manistee County, Michigan. Data from a multi-offset vertical seismic profiling (VSP) experiment were analyzed and compared to a three-dimensional seismic survey. With the strong reflection at the B-salt/A-2 carbonate interface, they are able to image the reef. The salt and evaporite layers in the A-1 and A-2 formations off the reef give a double reflection that is also used for imaging. The offset VSPs cover three azimuths, two in the direction of the reef and one off the reef, which allow us to compare results on and off the reef. First, a one-dimensional velocity structure was determined from the zero offset VSP data using a waveform inversion. These velocity results compared favorably with the full waveform sonic data. Using these velocities, a model was constructed for VSP migration. The migration algorithm is a Kirchoff migration based on paraxial ray tracing. The reef image from this migration is in good agreement with the three-dimensional seismic survey.

• Research Organization: Massachusetts Institute of Technology, Cambridge
• OSTI ID: 7041811
• Report Number(s): CONF-8610158-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
CARBONATE ROCKS
EVAPORITES
FEDERAL REGION V
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
MICHIGAN
NORTH AMERICA
PALEOZOIC ERA
ROCKS
SALT DEPOSITS
SEDIMENTARY ROCKS
SEISMIC SURVEYS
SILURIAN PERIOD
SURVEYS
USA