Typical Vertical Well Depths:                             13,800 feet
Well spacing allowances:                                             5 acres
Top of Sustained Gas:                  8,000 to 9,000 feet deep
Lance Pool Thickness:                           5,000 to 6,000 feet
Sand Pay:                                                   1,000 to 1,400 feet
Reservoir porosities:                                      6 to 12 percent
Effective gas permeabilities:           0.1 to 10 microdarcies
Number of Frac stages:                                             10 to 25
Typical 24 Hour IP rate:                    7 to 9 MMcfe per day
EUR Range:                                                     2.5 to 10+ Bcfe

Reservoir

Natural gas from the Pinedale field is produced from the Lance pool, a giant tight sandstone gas reservoir developed primarily between depths of 10,000 feet to 14,000 feet and is developed by over 3,000 vertical and directionally drilled infill wells within a 110-square-mile area. In 2016, over 500 billion cubic of natural gas was produced from Pinedale field, an average of 1.4 billion cubic feet of natural gas equivalent per day. 


The Lance Pool comprises overpressured, gas saturated fluvial sandstones and siltstones stacked within a 5,000-6,000 feet thick section of Upper Cretaceous sedimentary rocks, primarily the Lance Formation.  The Pinedale Anticline, a large NW / SE trending fold structure, controls gas accumulations at Pinedale Field

Geology and Reservoir

Geology