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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 70 (1986)

Issue: 8. (August)

First Page: 970

Last Page: 976

Title: Seismic Data Obtained Using .50-Caliber Machine Previous HitGunNext Hit as High-Resolution Seismic Source

Author(s): Michael D. Seeber (2), Don Steeples (3)

Abstract:

A seismic line across a shoestring sandstone served as a test of a .50-caliber machine Previous HitgunTop as a high-resolution seismic source in exploring for shallow sandstones. The line crosses part of the Bronson-Xenia oil field, which produces from the Bartlesville sandstone of the Cherokee Group (Pennsylvanian) in Bourbon County, Kansas, at a depth of 622 ft (190 m). The reservoir, which has a flat base and an irregular top, may represent a superposition of fluvial sandstones. The seismic line clearly depicts a lenticular sandstone that is up to 56 ft (17 m) thick. Both the lateral extent of the sandstone body and a slight velocity pull-up of the underlying layers are evident. In addition to the target sandstone, two additional sandstone bodies may be present at the east end of the line, where well control is not available.

Analysis of the seismic data indicates that the frequency of the .50-caliber source is from 30 to 170 Hz, with a dominant frequency of about 100 Hz. The high frequencies are retained deep into the section. Two shots per shotpoint are the minimum number necessary for acquiring high-quality data, and 12-fold is the minimum acceptable common-depth-point (CDP) coverage.

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