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Atlas of Major Texas Oil Reservoirs

Galloway, W.E., T.E. Ewing, C.M. Garrett, N. Tyler, and D.G. Bebout

This atlas is presented in oversized (17x22 inches) format and is an explanatory and illustrated folio of oil plays, fields and reservoirs in the State of Texas, USA. The authors have compiled 49 separate oil plays documented by some 456 fields and reservoirs for the 5 producing regions of Texas: Gulf Coast (Tertiary and Mesozoic); East Texas (Mesozoic); North Central Texas (Paleozoic); West Texas (Paleozoic); and the Texas Panhandle (Paleozoic). Of these, 215 are examples of carbonate reservoirs/fields from four of the five regions. These include the famous Cretaceous Edwards, Glen Rose, Sligo and associated formations, fractured Austin Chalk, Upper Jurassic Smackover Formation, Permian San Andres/Grayburg dolostones, Pennsylvanian Strawn, Cisco, Canyon units on the Central Basin Platform and the Horseshoe Atoll, the Silurian-Devonian ramp carbonates, and the Ordovician Ellenburger Formation. The volume begins with a 2-page introduction that includes abbreviations, definitions, and instructive depositional environment block diagrams, maps and cross sections. Most important, this introduction includes the famous stratigraphic chart of Texas oil-bearing horizons that is commonly used in posters, papers and presentations whenever Texas fields and/or reservoirs are discussed. Each synopsis for a reservoir type consists of 2 or 3 pages: a very short write up with key references; location, structure, thickness, and depositional environment maps, cross sections, and block diagrams; structure and stratigraphic well-log-constructed cross sections; type logs and lithologies; various production maps; and miscellaneous tables and charts with reservoir parameters, and production performance and history. These synopses quickly get a reader up the learning curve about Texas oil plays and reservoirs to a level that one is able to effectively dive deeper into specifics about a field he or she may be working or investigating. Although all known Texas oil fields to-date, including unconventional plays, are not listed in this 1983 compilation, all of the significant conventional plays and reservoirs are catalogued and illustrated. On the back cover is a folder with 5 plates or maps of Texas with key hydrocarbon system elements developed for each play. These are: Plate 1 – Reservoir Lithology and Plays; Plate 2 – Reservoir Genesis and Major Structural Elements; Plate 3 – Producing Stratigraphic Unit; Plate 4 – Trapping Mechanism; and Plate 5- Drive Mechanism. Note, there is a companion volume - Atlas of Major Texas Gas Reservoirs that has the same format, and was compiled by E.C. Kosters, D.G. Bebout, S.J. Seni, C.M. Garrett, L.F. Brown, H.S. Hamlin, S.P. Dutton, S.C. Ruppel, R.J. Finley, and N. Tyler in 1989 as a joint venture between the Bureau of Economic Geology at the University of Texas and the Gas Research Institute of Chicago. For anyone starting out working on any Texas oil field or reservoir, carbonate or siliciclastic, this is the first reference to seek for getting out of the starting gate like a shot!

Galloway, W.E., T.E. Ewing, C.M. Garrett, N. Tyler, and D.G. Bebout, 1983, Atlas of Major Texas Oil Reservoirs: Texas Bureau of Economic Geology, 139 p.

Jim Markello and Bill Morgan



Carbonates,Sedimentology and Stratigraphy

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