Sand distribution, facies relationships, and structural styles of the Spiro Formation, frontal Ouachita Mountains, southeastern Oklahoma

Conference · Fri Mar 01 04:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5673618

Hinde, L K ^[1]

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1. Baylor Univ., Waco, TX (United States)

Ongoing gas exploration in the overthrusted portion of the Arkoma basin continues to demonstrate the excellent reservoir characteristics of the early Atokan Spiro Formation. This activity is providing valuable new data for a comprehensive surface-to-subsurface study. The Spiro Formation represents a mixed carbonate and terrigenous clastic platform complex that consists of laterally interfingering sandstone, shale, and limestone. Three sand bar tracts can be delineated within the Spiro based primarily on surface control. The easternmost tract is the most areally extensive, and it is characterized by sand thickness in excess of 150 ft. South of the present-day Pine Mountain fault, terrigenous clastic and spiculitic slope and basinal sediments accumulated, whereas east of the surface exposures (along the frontal zone), the Spiro grades into a shale facies. Late Pennsylvanian thrust faulting produced a narrow belt of fault repeated sequences that crop out only in the frontal Ouachita Mountains. Differences in thrusting styles between the easter and western parts of the outcrop belt reflect variations in lithologic character and probably in subthrust structure. Palinspastic restoration of thrust sheets established a basis to extend paleodepositional trends and sand bar geometries from the surface into the subsurface.

• OSTI ID: 5673618
• Report Number(s): CONF-910403--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 75:3
• Country of Publication: United States
• Language: English

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EXPLORATION
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