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Pennsylvanian And Lower Permian Stratigraphy And Shale Gas Potential Of The Palo Duro Basin
Talbert, Brendan
Talbert, Brendan
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2020
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The Palo Duro Basin is a northwest-southeast trending cratonic basin in the Texas Panhandle that formed from uplift of the Amarillo/Wichita Mountains during the Pennsylvanian, and subsequent subsidence during the Permian. Sediments were deposited in a number of environments, the most prominent being fan-delta, carbonate shelf, and deep basin settings. Major lithologies in the Pennsylvanian are granite wash, shelf-margin carbonates, and basinal shales, while the Permian hosts the same lithologies, as well as numerous evaporites and red-bed sequences. Log data from 162 wells was used to correlate the lateral extent of depositional systems across the Palo Duro Basin. Stratigraphic cross sections as well as isochore, structure, and net lithology contour maps were used interpret the locational and temporal changes of depositional systems through the Pennsylvanian and Wolfcampian. Sonic and deep resistivity logs were used to analyze source potential in the Palo Duro Basin using Passey’s method, finding that both Pennsylvanian and Wolfcampian aged deep basin shales have source potential, with TOC% ranging from 0.0% - 4.5%. BasinMod was used to create one-dimensional models of wells that reached interpreted deep basin settings at depth. From one-dimensional models, Pennsylvanian aged strata range from the early oil generation window to the main gas generation window in present day. Wolfcampian aged deep basin strata is in the present day early to mid-oil generation windows.
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Geological Sciences