The modern marble falls play in the western edge of the fort worth basin is an exciting new unconventional oil and gas play.
Marble falls formation fort worth basin.
It extends across an area of more than 15 000 square miles and comprises an assortment of facies that vary considerably across the region due to high.
The marble falls of the fort worth basin is a very impure limestone that contains a remarkably large percentage of sand and or conglomerate in addition to shale.
The barnett shale the grandfather of all shale plays might be entering its twilight.
The true marble falls of the fort worth basin is a very impure calcareous rock that contains a remarkably large percentage of silica in the form of sponge spicules quartz sand and or.
Specifically karst in the fort worth basin ellenburger group exhibits strong dip negative curvature low coherence and a shift to lower frequencies.
The early pennsylvanian marble falls formation in the fort worth basin fwb of north central texas was deposited in a broad carbonate ramp system during the initial stages of ouachita orogenesis.
Chronology of harland et al 1990 over western parts of the fort worth basin across the llano uplift and into the eastern kerr basin fig.
But there is another oily horizontal opportunity opening up in the fort worth basin fwb.
Chert probably allochthonous is not uncommon especially in the upper few dozen feet of the formation.
It s still very early in development.
The marble falls sits between the barnett shale and the shallow conventional oil and gas formations that made the fort worth basin one of the largest producing oil and gas.
In most cases the marble falls was not the primary objective in drilling the well but the zone was completed when the primary.
The lower marble falls.
The marble falls formation and its lateral slope to basinal equivalent the smithwick formation were deposited during early pennsylvanian time morrowan atokan about 15 7 ma.
Marble falls and smithwick formation carbonates and shales were deposited on the western margin of the slowly subsiding fort worth basin of central texas during early pennsylvanian time.
The upper marble falls member carbonate platform back stepped towards the west southwest as smithwick outer shelf slope black shales drowned platform margin areas to the east.
Prior to 2010 approximately 2 500 wells were completed in the marble falls formation.
