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Book Chapter

Shelf Sand-Ridge Core Studies

Published:
January 01, 1985

Abstract

The Solar Petroleum Navajo F-151 (NW Sec. 10 T31N R17W), which is the subject of this discussion, is located in Horseshoe Field in the San Juan Basin in San Juan County, New Mexico (Fig. 1). It produces from the Tocito Sandstone Lentil of the Mancos Shale which has been incorrectly included by many workers in the Gallup Sandstone of Turonian and Coniacian (Upper Cretaceous) age (Fig. 2 and 3). The Tocito Sandstone Lentil is typically inter-bedded with or lies at the base of the upper Mancos (Niobrara) Shale in the western and central parts of the San Juan Basin (Molenaar, 1973, 1983a).

Substantial amounts of the production attributed to the Gallup Sandstone should probably now be attributed to the Tocito Sandstone Lentil (125 million barrels, to date, Fassett, 1981). The most conclusive evidence for differentiating the Tocito Sandstone from the Gallup Sandstone is obtained from outcrop studies and from cores such as the Solar Petroleum Navajo F-151.

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Contents

SEPM Short Course Notes

Shelf Sands and Sandstone Reservoirs

R. W. Tillman
R. W. Tillman
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D. J. P. Swift
D. J. P. Swift
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R. G. Walker
R. G. Walker
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SEPM Society for Sedimentary Geology
Volume
13
ISBN electronic:
9781565762428
Publication date:
January 01, 1985

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