Conclusions

• Thicker and laterally extensive coals develop towards the end of the transgressive systems tract and beginning of the high-stand systems tract.
• The Riverton-Neutral depositional succession of coals thickens slightly to the northwest thickening as the Mississippian structure deepens.
• The Bluejacket to Weir coals also thicken to the northwest and are primarily of coastal-plain origin
• Fleming to Bevier coals thicken in the east and north and are more laterally persistent (because of deepening marine conditions throughout).
• The structure of the Mississippian limestone is likely the single most important factor in determining net accumulations of thickness of Pennsylvanian coals.
• Net coal thicknesses typically range from 15-35’ (5-11m), although extremes locally occur.
• Gas values (SCF/TON) measured in the Forest City basin are generally less than what is recorded in the CBM play in the Cherokee Basin of southeastern Kansas, but thicker net coal accumulations in the area may become a source of methane production in the future as the economics of CBM in Kansas evolve.
• Thermal maturation indicators suggest that strata in the Forest City basin decrease in thermal maturation towards the north. This decrease in thermal maturation may account for the lower gas content in coals in the Forest City basin.

http://www.kgs.ku.edu/PRS/AAPG2005/forestcity/p3-07.html

Last Modified August 2005