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Milankovitch sea-level changes, cycles, and reservoirs on carbonate platforms in greenhouse and icehouse worlds

Read, J.F., C. Kerans, L.J. Weber, J.F. Sarg, and F.M. Wright

This SEPM Short Course Notes volume is organized into three parts. Part 1 is an "Overview of Carbonate Platform Sequences, Cycle Stratigraphy and Reservoirs in Greenhouse and Ice-House Worlds" by Read. Part 2 is a discussion of "Use of 1- and 2-D Cycle Analysis in Establishing High-Frequency Sequence Frameworks" by Kerans. Part 3 is the "Sequence Stratigraphy and Reservoir Delineation of the Middle Pennsylvanian (Desmoinesian), Paradox Basin and Aneth Field, SW Utah" case study by Weber, Sarg, and Wright. In Part 1, Read pulls from his extensive experience with carbonates and from many of his graduate students' theses to produce an in-depth and wide-ranging set of discussions on the controls of carbonate sequence development as interpreted from both outcrops and the subsurface. Of significance from these lectures is the contrast in sequence development and diagenetic histories with drastically differing pore systems between carbonate systems deposited under greenhouse versus icehouse conditions. Part 2 is the section in which Kerans illustrates and discusses, in 1- and 2-dimensional context, his interpretation of high-frequency stratal architecture for the Upper Permian formations that compose the famous Leonardian-Guadalupian 2nd-order supersequence exposed in the outcrops of the Guadalupe Mountains, Texas and New Mexico. The depositional facies, platform profiles, sequence stratigraphic surfaces, cycles, and stratal geometries are defined and illustrated with cross sections hung on multiple datums, and that had been introduced in previous publications. Inclusion of this outcrop case study effectively reinforces the concepts about greenhouse and transitional climate-forced stratigraphy discussed by Read. Part 3 is a detailed and thorough explanation of the completed work on the Pennsylvanian Desert Creek and Ismay carbonate reservoirs and surrounding strata, Aneth Field region, SE Utah. This is the first ice-house characterized, sequence stratigraphic analysis of these Middle Pennsylvanian reservoirs, and it is the first time that the reservoir architecture of these reservoirs' stratal geometries has been documented to explain, via high amplitude glacio-eustacy, the occurrence of downdip shallow water ooid facies and updip relatively, deeper water algal mound and skeletal packstone facies. The concepts concerning carbonate reservoirs, provided in this SEPM Short Course, should be applied during the initial phases of carbonate reservoir characterization for determining reservoir architecture. Without them, practitioners will have a very tough time getting to a satisfactory reservoir architecture answer that will yield valid simulation results.

Read, J.F., C. Kerans, L.J. Weber, J.F. Sarg, and F.M. Wright, 1995, Milankovitch sea-level changes, cycles, and reservoirs on carbonate platforms in greenhouse and icehouse worlds: SEPM Short Course Notes No. 35, 203 p.

Jim Markello and Bill Morgan

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https://100years.aapg.org/most-influential-books-in-carbonate-reservoirs

Carbonates,Sedimentology and Stratigraphy

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