Seismic structure and seismic stratigraphy of the giant Aneth field and its satellite fields of Southeast Utah

Conference · Sun Aug 01 04:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6692627

Johnson, J F; Groen, W G ^[1]

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1. Chuska Energy Company, Denver, CO (United States)

Extensive seismic coverage in and around the greater Aneth field reveals much about the structure and stratigraphy of the Pennsylvanian Paradox Formation. The terminus of a northward-projecting nose of the Defiance uplift created a structural platform active throughout most of Late Pennsylvanian, and served as the foundation for the Aneth carbonate platform during upper Paradox deposition. Seismic and subsurface control demonstrate that the northwest-southeast-trending Four Corners lineament coincides with and probably acted as, a control on salinity concentrations in the marine environment. Higher salinities northeast of the Four Corners lineament, along with the positive structural position of the platform, contributed to conditions favoring growth of alga mounds in the Aneth area during deposition of Desert creek stage of Paradox Formation. The Aneth field is a complex of coalesced algal mounds and associated facies covering 75 mi[sup 2]. Surrounding Aneth field are numerous satellite mounds (from under 30 to over 200 ac in size) that are identifiable with high-resolution common-depth-point seismic. Seismic expression of the algal mounds are characterized by one or more of the following: (1) isochron thickening of the Desert Creek unit; (2) isochron thinning of the overlying Ismay unit; (3) amplitude dimming of the Desert Creek reflector; and (4) a [open quotes]doublet[close quotes] development of the Desert Creek event. Calibrated amplitude variations within the mound seismic anomaly are in part a response to reservoir porosity and can be employed in mapping reservoir distribution.

• OSTI ID: 6692627
• Report Number(s): CONF-930947--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
DEVELOPED COUNTRIES
GEOLOGIC DEPOSITS
GEOLOGY
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
NORTH AMERICA
OIL FIELDS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
RESOURCES
SEISMIC SURVEYS
STRATIGRAPHY
SURVEYS
USA
UTAH