Tight Sand?19 Dec 2017 14:12
A lot of posters on LSE and Hot Copper seems to think that Dempsey reservoir is tight sand therefore fracking is needed, to me it seems like the well bore is skinned, this happens when you over pressure the mud to control the high well pressure, the fractures in the sand are blocked near to the well bore. The perforation gun cannot reach beyond the blocked sand, so the flow rate is low, it will have to be fractured with acid to wash out the mud. I am no expert but I expected this to happen, this is the biggest hazard when drilling high pressure reservoirs, the higher the permeability the deeper the mud will penetrate into the sand. The good news is that permeability could be high, if they were low there would be nothing you could do about it, and the development cost could be much higher. I am sure they will find an answer and when they do we will be sitting on a large discovery.
jhaylock