E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/10 (2012.01) E21B 47/00 (2012.01) G01F 1/34 (2006.01)
Patent
CA 2231947
A method is provided for determining the actual inflow rates of gas and liquid into a wellbore from a reservoir. The wellhead is first closed and the wellhead pressure is measured over time. For a briefly period, gas is flowed from the wellhead and the wellhead pressure is measured again. Using the two conditions, the original wellbore gas volume and an original fluid inflow rate is determined. Gas is again flowed from the wellhead, both the flow and the pressure being measured, but this time for a prolonged duration, sufficient to affect the reservoir. Assuming the original gas inflow rate and original gas volume remain unchanged during the prolonged flow, a total rate of fluid inflow from the reservoir is determined, and finally an incremental inflow rate of fluid from the reservoir is calculated as being the difference between the total rate of fluid inflow less the original rate of gas flow. If the well is a gas well, the incremental fluid inflow is the actual gas inflow rate. If the fluid inflow is known to be liquid, then an incremental change in volume is equivalent to the liquid inflow rate. Using an exponential relationship for the pressure change during wellhead flow, a theoretical curve pressure response curve can be created, displayed and compared against the actual pressure response, any deviation therebetween being indicative of fluid inflow from the reservoir.
Alexander Lloyd G.
Na
LandOfFree
Method of determining fluid inflow rates does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of determining fluid inflow rates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of determining fluid inflow rates will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1569747