History of Exploration and Commercialization of the Giant Pinedale Tight Gas Sand Field, Sublette County, Wyoming
Stephen R. Kneller, J. Paul Matheny, Richard G. Albertus, Elliott A. Riggs, 2014. "History of Exploration and Commercialization of the Giant Pinedale Tight Gas Sand Field, Sublette County, Wyoming", Pinedale Field: Case Study of a Giant Tight Gas Sandstone Reservoir, Mark W. Longman, Stephen R. Kneller, Thomas S. Meyer, Mark A. Chapin
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Pinedale field, located in Sublette County, Wyoming, is one of the largest natural gas fields in the United States. The discovery and commercialization of this field covers a period of nearly 60 years. During this time, many different companies and people were involved in bringing Pinedale to the point of commercial production. The field produces from the Upper Cretaceous Lance Formation on the Pinedale anticline. The Lance Formation is a series of stacked sandstones interbedded with siltstone, mudstone, and shale. The sandstones typically average about 7% porosity with permeabilities in the single-digit micro-Darcy range. In much of the Pinedale field, the Lance reservoir section is over 5500 ft (1700 m) thick, and it is typically overpressured throughout the section. The commercialization of the field was made possible through the convergence of a better understanding of the geology of the reservoir rocks and the nature of the field’s structure as revealed through the use of modern three-dimensional (3-D) geophysical data. This understanding permitted the development and utilization of modern drilling and completion practices that were developed during the drilling of the adjacent Jonah field and that continue to evolve today.
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Pinedale Field: Case Study of a Giant Tight Gas Sandstone Reservoir
Improved geologic insights combined with advances in technology and innovative thinking, mainly since the laste 1990s, have driven Pinedale field’s development and unlocked a giant natural gas resource in stacked low-permeability fluvial sandstones. Understanding this field can provide a model for developing similar tight sandstone reservoirs around the world. This memoir contains 15 well-illustrated, peer reviewed chapters that describe the history of field development, the deposition and diagenesis of the reservoir rocks, geophysical characteristics of the field, special core analysis techniques used to better quantify the reservoir, petrophysical characteristics and interpretations of the reservoir, the types and abundance of natural fractures, and fluid production characteristics in the field. Finally, static and dynamic models for the field are presented in an attempt to integrate all the pieces of this giant geologic puzzle.