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Directional acoustic velocity distribution in a petroleum reservoir. [P waves].

Author
Shuck, L. Z.
Published
United States : [publisher not identified], 1974.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1974.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Evans, D. M., Frohne, K. H., and Rennick, G. E.

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Summary
Experimental conditions, theoretical considerations, and results are given of a directional acoustic velocity survey in the plane of formation of a major oil reservoir in Pennsylvania. Over 60 blasting cap acoustic sources were discharged opposite the Bradford Third sand in 10 different wells located within a 1,200 by 1,600 foot rectangular array of 41 wells. Each source was monitored simultaneously by 11 different hydrophones strategically located within the 41-well array. Both acoustic sources and sensors were located at the formation elevation, nominally 2,000 feet below the surface, so that the in situ velocities determined were in the plane of the sandstone formation. Well-to-well acoustic velocities were calculated and presented in tabular and graphical form. The velocity data were further analyzed statistically to yield overall reservoir velocity trends. Results of the study shows that the reservoir is acoustically very nonhomogeneous with local variations in P-wave velocity as much as 20 percent. The overall P-wave velocity trend for the reservoir was greater in the E-W than the N-S direction by approximately 700 fps. A mean velocity averaged for all wells in all directions was found to be 15,621 fps. Characteristics such as permeabilities, porosities, tectonic stresses, are correlated with the acoustic velocity distribution. (12 fig., 3 tables, 42 references)
Report Numbers
CONF-7410175-5
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
OSTI Identifier 7333487
Research organization: Bureau of Mines, Morgantown, W.Va. (USA). Morgantown Energy Research Center.
View MARC record | catkey: 43938992