BHP behaviour
BHP behaviour
(OP)
Hello all,
I think when liquid rate increases, BHP should increase as well. The opposite behaviour could be seen when GOR or gas Lift increases, or when water cut decreases, isn't it?. But I am simulating several 12000-15000 ft depth wells, 30API and I am getting lower BHPs at higher liquid rates (1M-10MBOD)at constant water cut,GOR (up to 500) and gas lift (up to 2 MMSCFD). Then, at higher GOR and Gas lift I can see the expected behavior, could you think in a reson for that?
Regards
I think when liquid rate increases, BHP should increase as well. The opposite behaviour could be seen when GOR or gas Lift increases, or when water cut decreases, isn't it?. But I am simulating several 12000-15000 ft depth wells, 30API and I am getting lower BHPs at higher liquid rates (1M-10MBOD)at constant water cut,GOR (up to 500) and gas lift (up to 2 MMSCFD). Then, at higher GOR and Gas lift I can see the expected behavior, could you think in a reson for that?
Regards





RE: BHP behaviour
The condition that you describe for the flowing well is not necessarily wrong. While higher flow rates will give you higher friction drop up the tubing (assuming GLR doesn't change), it might also flatten the pressure traverse across the near wellbore and lower the flowing bottom-hole pressure. My point is that the system is just too complex to reliably take one piece of the system as varying and assume everything else is constant.
David
RE: BHP behaviour
Regards
RE: BHP behaviour
I'm not sure to understand your's system description.
If your reservoir conditions keep the same (same deliveravility or IP) and your artificial lift system is able to handle the increase in production up to surface(with an increse in lift gas or a frequency increase in your pump, for instance), the BHP should decrease as your liquid rate increases, as you need to create more drawdown (Res. Pressure minus BHP) to extraxt more fluid from the reservoir...
If you increaee your gas lift rate (or your GOR) up to certain limit, your fluid column up to surface will be less dense and the "weight" of fluid over the bottom of the hole will be lower, getting a lower BHP, a larger drawdown and a higher fluid rate...
Please, if you're not happy with this answer, give us more details about your exact system's original configuration and the changes you apply.
Regards.
RE: BHP behaviour
Regards