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Problem 5-5 Material Balance Wet Gas Reservoir Gas-In-Place

This document provides pressure and production data from a wet gas reservoir over time, including cumulative volumes of gas, condensate, and water produced. It asks to (1) estimate the original gas-in-place given the pressure history and assuming negligible rock compaction, and (2) calculate the estimated ultimate recovery of gas and corresponding volumes of sales gas and condensate based on an abandonment pressure of 500 psia.

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Charles Pabane
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54 views1 page

Problem 5-5 Material Balance Wet Gas Reservoir Gas-In-Place

This document provides pressure and production data from a wet gas reservoir over time, including cumulative volumes of gas, condensate, and water produced. It asks to (1) estimate the original gas-in-place given the pressure history and assuming negligible rock compaction, and (2) calculate the estimated ultimate recovery of gas and corresponding volumes of sales gas and condensate based on an abandonment pressure of 500 psia.

Uploaded by

Charles Pabane
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Problem 5-5

Material Balance

WET GAS RESERVOIR GAS-IN-PLACE

The following wet gas reservoir produces separator gas, separator condensate and fresh water.

1. Given the attached pressure and production history, estimate the original gas-in-place.
Assume that rock compressibility is sufficiently low that rock compaction can be ignored.

2. The abandonment pressure has been set at 500 psia (p/z). What is the estimated ultimate
recovery of wet reservoir gas? What are the corresponding volumes of sales gas and
condensate?

Cumulative
Pressure Z Gas Condensate Water
(psia) (MMscf) (STB) (STB)
3200 0.9135 0 0 0
3000 0.907 49 2409 166
2750 0.9008 114 5607 386
2500 0.8968 180 8853 610
500 1.0000

Condensate Properties API Gravity = 55


Molecular Wt = 124
Water Properties Specific Gravity =1

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