RE: Flow rates29 May 2024 08:38
Hi Ezhik. I'll try to be brief as it's quite a complex subject. We've been told the reservoir pressure is 172 bar which is about 2,500 psi. This suggests, if the porosity and permeability are good, that the Schwarzbach-2 well ought to flow naturally without using a pump. However, I suspect, when the well was first drilled, that they had to use a heavy drilling mud at some point because of operational problems. This is why drilling fluids and / or solids got into the formation and plugged off much of the porosity. When the well was first completed I expect the operator will have used a much lighter completion fluid, such as brine, so the reservoir pressure should have been greater than the pressure exerted by the completion fluid, thus allowing the well to flow naturally. They only seems to have produced about 40 bopd, and that was with a beam pump. However, it should do much better if there's no formation damage, and that is what the sidetrack is trying to achieve. However, I believe no cores were taken in the original well, and probably none in this sidetrack, so they don't yet really know what the permeability is. The 900 bopd that's been suggested with an ESP (electrical submersible pump) is really only an educated guess. IMO 250 bopd would be very acceptable and would be a 6 times improvement. Also, the natural flow - if there is any - should give them a more reliable idea about the permeability. But I'm still not expecting 900 bopd. I've been told that the well logs aren't all that good, in spite of what BCE has said earlier, but that's only industry gossip.