Over the past year, there have been many discussions regarding Devon's frac design on their TMS wells. I commend them for being the "TMS leasing pioneer", but their operational approach has generated many questions. With many rumors circulating regarding their status in the play, it might be a good time to perform some post-analysis.
I believe that their results can be directly correlated to the landing zone of the laterals and the amount of proppant pumped. The log below displays the Passey Log Method where the deep induction and sonic logs separate with increasing TOC. Across the play, the target zone typically appears 30-70' above the base of the TMS. The wells with the best initial potentials in the play so far (Encana's Anderson 17h/18h), landed in this zone quite well. Devon's initial wells (Beech Grove, Soterra) landed very high in the section likely due to the fact that they believed that the water bearing sands below could be an issue. Their next four wells targeted very low in the section. These wells should disprove the theory that the water bearing sands below are an issue. None of their six wells landed in the highest TOC section of the TMS. The minimal proppant levels make the probability of achieving an economic well even more unlikely. The Richland Farms 74H-1 was the closest to the target zone and when you compare the IP30 to the 91,600 #/stage pumped, this well exhibits the most efficient, economic result. It would be interesting to see this well offset with a higher landing target and 450,000 #/stage of proppant. I envision 1200+ boepd.