No, no, I didn't say that. I said that there is not a company standard.
The way reservoirs work in general is that you pump a fluid in, and because of interstitial pressures in places where things cannot come back out, they stay in place. If you pump a job and you have no other water in the reservoir, you'll produce as much water out of that reservoir over a period of time as the reservoir will give up. You don't just say that after so much you stop. That's not the way it works. You produce it back. Over many, many years you might produce that water back. At some point, it might not be produced back and it may stay in the reservoir over time.