The EFS structure map is not suprising.
Often in regional mapping of this scale the significance of subtle local structures and fairways of productivity are masked...the implementation of basement plate shears is something I ( like probably others) have been observing for some time....my scribing of these shears is at first driven by region-wide gravity and magnetic surveys, corroborated by or reinforced by linaments of Edwards, Georgetown, Buda and Austin Chalk "fairways of production. Adding the overlay of "reservoir pressure" (mudweights) and GOR of recent EFS completions is illuminating and providing further "sweet spot" compartmentalization. Tracking the character of Edward's ratios offers more data points...and "crossplotted" below, as it were, the Eagle Ford is distinquishing a set of "fencelines for expectations I look to be fulfilled in future EFS drilling.
The contrast scoping between Petrohawk's map of net porosity and my map of gross interval velocity arises from: 1) I don't have logs of recent wells to flush out the isopach, 2) I don't have any contact with Petrohawk, to have a sense of cutoffs / flags / or data points they have used.
The artful interpretation of net TOC stands alone here. I have not seen nor heard of anyone else unveiling such a map...I developed transforms calibrated to EFS wells, scant geochemistry, and some gas shale log analysis. My efforts sought to establish a trend-wide transform with cutoffs and flags I could apply to conventional legacy logs of gamma ray, resistivity, density porosity, bulk density, and sonic records. The problem, among several, is the depth/pressure/compressibility/fluid components that are NOT laterally continuous. While I considered drawing compartments to gain resolution....I thought the better of it to wait until I felt I had a better foundation of what really was significant and defensible. My sense is that some workers are not looking at the storage issue to support the significant rates we are experiencing in the trend.....for not recognizing the lithologic variance in the system.
B.