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Wed, Nov 15

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Pioneer Natural Resources

November Luncheon - Lowell Waite, UTD

Re-Exploring the Eastern Shelf of the Midland Basin

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Time & Location

Nov 15, 2023, 11:30 AM – 1:00 PM

Pioneer Natural Resources, 777 Hidden Ridge, Irving, TX 75038, USA

About The Event

The Eastern Shelf of the Midland Basin is one of several high-standing Permo-Pennsylvanian depositional shelves surrounding the deeper Delaware and Midland Basins. Dipping a modest 1.3 degrees eastward, stratigraphic units of the Eastern Shelf consist of a relatively thin succession of pre-Pennsylvanian units (Upper Cambrian sandstones and Lower Ordovician and Mississippian carbonates) unconformably overlain by a thick section of Upper Pennsylvanian to lower Permian cyclothems (alternating lowstand clastics and highstand carbonates). A century of exploration has shown the region contains a multitude of small- to medium-sized conventional oil and gas fields, most of which are housed within Pennsylvanian (Strawn, Canyon) reservoirs. These hydrocarbon reserves occur at a relatively shallow depth (-4000 to -8000 ft. MD). The complex stratigraphy of the region suggests that much oil and gas remains to be found.

Detailed analysis of producing fields from Nolan County, Texas, indicates a wide range of structural and stratigraphic traps within a total of eleven (11) individual producing zones. These include, from oldest to youngest: Cambrian sandstone; Lower Ordovician Ellenburger dolomite; Mississippian limestone; Lower Strawn Caddo and Odom limestone; Upper Strawn sandstone and limestone; Pennsylvanian (Strawn – Canyon) reef; Canyon (Lower Wolfcamp) sandstone; and Cisco (lower Wolfcamp) sandstone and limestone. Some operators have recently initiated exploration of Lower Wolfcamp shales utilizing horizontal drilling and completion techniques. The prospect of further shale exploration along western margin of the Eastern Shelf, as well as the possibilities of additional development of conventional reservoirs within and between existing fields, may provide exciting future opportunities in this region.

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