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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Facies and
Sequence
Stratigraphy of the Abo
Formation in the Kingdom Field Area, Terry and
Hockley Counties, West Texas
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By
1OMNI Labs, Inc., Houston, Texas
2Wagner & Brown, Ltd., Midland, Texas
Study of conventional cores, well
logs and seismic data in the
Kingdom Field and other parts of the Abo shelf complex
trend in eastern New Mexico and west Texas has led to new concepts
about the style of deposition and techniques for stratigraphic
subdivision of the Leonardian Abo Formation. The
implications of paleogeographic restoration of the Abo shelf,
combined with detailed description and interpretation of
conventional cores from nine wells in Kingdom Field, has resulted
in the identification of four important depositional facies that
have significant control on reservoir character: supratidal/
terrestrial (up-dip and top seal), intertidal (reservoir grainstones),
platform interior (reservoir barrier) and shelf-edge
(secondary reservoir). A fifth facies, karst breccia, is also defined.
This study reveals that the most productive facies in Kingdom
Field (and along the trend) is the intertidal facies (peloid grainstones),
not the shelf-edge facies (boundstone reef). High-resolution
stratigraphic
analysis
combining Fischer plots,
well
log
cross-sections, and 3D seismic data shows that at least three
third-order
sequence
boundaries, associated with exposure of the
shelf and significant karsting, are intraformational in nature.
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