: RE: RE: RE: Good newsDMR Bitch,
You seem to have some facts but you like to scew them to your advantage;
1. you claim that the bad wells have a SOR of 23 (as you calculated) yet you don't include the fact that many wells have been steaming and not producing (with an infinite SOR)........or may just be coming on line. Did you happen to mention that many wells have a SOR under 3.......or even 2! Nope.
2. This gas cap thing. Why in the world would LL have an excess water issue at the beginning of the year, requiring new disposal well tie ins if they have all these gas pockets to shove steam into? Just pressue up those gassy wells and bye, bye water.
3. Hard facts eh......225 deg c is 10-15% better than 200 deg C. Hmmm lets take a look at that one. Saturated steam at 225 deg (2500 kpa saturated, with no superheat) is 2803 kj/kg (kilojoules / kilogram) . Once condensed, the energy in the water is 967 kj/kg for a difference of 1836 kj/kg. That means for every kg of steam condensed in the well, 1836 kj of energy is transmitted into the formation. NOW take 200 deg C (1500 kpa saturated), which is only 2793 kj/kg and condenses with 853 kj/kg of energy for a difference of 1941 kg /kg. That means, the lower pressure steam can actually transmit more energy per kg of steam into the formation. ON top of that, you can add more superheat to the lower pressure steam which adds even more energy to the formation......per kg.
Now, I will admit that this is not necessarily the fastest approach to add heat, as when you increase the pressure, you can increase the amount of kg of steam in the same space but it is also common knowledge that having to much heat too soon will cause the well to grow up instead of out. Many other SAGD facilities have learned this lesson the hard way too.
So if every other SAGD operator knows that you can increase you efficiency and build a longer lasting well by using lower pressures........why is it so bad for NEXEN to do the same? Maybe this is why they run the way they do.
Giver.