Anyone know why RRC allows operators to inaccurately estimate well depth in their W-1 permit applications, e.g., 25% variance in the actual wellbore depth? RRC’s User Guide says nothing except to enter total vertical depth on the W-1. I thought 21st century drilling was technologically advanced such that E&P companies know more precisely their target depths, especially their own & competitor wells in the area?
Example, W-1 & permit papers estimated “total depth” 15,000 for two long laterals drilled from shared well pad, but the G-1 completion depths vary dramatically. One well is 10,782 total depth TVD and 20,663 total depth MD, while the sister well is 11,148 TVD and 21,118 MD. Presumably the first well is Wolfcamp A and the sister is Wolfcamp B. The disparity between W-1 permit depth and G-1 as drilled depths are 26%-28%.
I suppose you just can’t trust the W-1, wait and see the G-1 completion report?