Calculating Static Bottomhole Pressures for Dry and Wet Gas Wells
AssigneeSaudi Arabian Oil Company
InventorsNasser M. Al-Hajri, Mohammed D. Al-Ajmi, Ahmed A. Homoud
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Abstract
A wellbore is divided into a plurality of depth intervals. For each depth interval of the plurality of depth intervals, a specific gas gravity, pseudo-critical gas properties, a pseudo-reduced gas pressure and temperature, a gas deviation factor, and a gas gradient and a bottom node pressure are determined. The determined bottom node pressure is used as a static bottomhole pressure.
Claims15
A computer-implemented method, comprising:
- dividing a wellbore into a plurality of depth intervals;
- for each depth interval of the plurality of depth intervals:
- determining a specific gas gravity;
- determining pseudo-critical gas properties;
- determining a pseudo-reduced gas pressure and temperature;
- determining a gas deviation factor using the pseudo-reduced gas properties;
- and
- determining a gas gradient and a bottom node pressure;
- and
- using the determined bottom node pressure as a static bottomhole pressure.
A non-transitory, computer-readable medium storing computer-readable instructions executable by a computer and configured to:
- divide a wellbore into plurality of depth intervals;
- for each depth interval of the plurality of depth intervals:
- determine a specific gas gravity;
- determine pseudo-critical gas properties;
- determine a pseudo-reduced gas pressure and temperature;
- determine a gas deviation factor using the pseudo-reduced gas properties;
- and
- determine a gas gradient and a bottom node pressure;
- and
- use the determined bottom node pressure as a static bottomhole pressure.
A computer-implemented system, comprising:
- at least one computer interoperably coupled with a memory storage and configured to:
- divide a wellbore into plurality of depth intervals;
- for each depth interval of the plurality of depth intervals:
- determine a specific gas gravity;
- determine pseudo-critical gas properties;
- determine a pseudo-reduced gas pressure and temperature;
- determine a gas deviation factor using the pseudo-reduced gas properties;
- and
- determine a gas gradient and a bottom node pressure;
- and
- use the determined bottom node pressure as a static bottomhole pressure.
Dependencies are inferred from the claim text.