--> Abstract: “But, the Logs Looked Great!” . . . Commercial Gas Production in the Lower Atoka (Grant) Sands, Parker County, Texas. Does Stratigraphic Complexity Induce this Economic Enigma?, by W. T. Crowder, Jr.; #90905 (2001)

Datapages, Inc.Print this page

“But, the Logs Looked Great!” . . . Commercial Gas Production in the Lower Atoka (Grant) Sands, Parker County, Texas. Does Stratigraphic Complexity Induce this Economic Enigma?

W. T. Crowder, Jr.
Independent Geologist, Dallas, TX

A portion of the subsurface section in Parker County, Texas is represented by several thick deltaic reservoirs of Pennsylvanian age which range in depth from 2,000 to 5,000 ft measured depth (MD). Although a few significant fields, such as the Cockrell and Buckner “Strawn” Fields, have produced commercial volumes of natural gas from these sands since the 1970s, the vast majority of wells in Parker County exhibit log responses across the Atoka interval which appear productive but do not produce economically. These “noncommercial” wells have Atoka intervals, which are calculated to be productive and also display similar log responses to wells that have produced economically from the Atoka sands. In many cases, an individual well that has produced commercially from the Atoka section is offset by several economic failures.

This presentation discusses the similarities of log characteristics in several wells and compares the results of completion attempts made in those intervals. Several specific examples are given and broad generalities are discussed with hope of stimulating new ideas and ways to “crack the Atoka code”.

AAPG Search and Discovery Article #90905©2001 AAPG Southwest Section Meeting, Dallas, Texas