Ann: Transforming New Standard Energy , page-169

Here what Marathon doing in the EFS according to rigzone

Company officials reports that Marathon has achieved an accelerated learning curve in its capital-intensive U.S. unconventional plays, with a more than 50 percent improvement in its time from the spudding of a well to reaching total depth in its Eagle Ford drilling. The number of days from spud to total depth has declined from 24 days in fourth quarter 2011 to 12 days in this year’s third quarter. -


See more at: http://www.rigzone.com/news/oil_gas/a/130596/Marathon_to_Ramp_Up_US_Shale_Activity_Market_North_Sea_Assets/?pgNum=1#sthash.Ahc8A7Ab.dpuf


Yep I can see NSE do this..simple as Pi