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PVT of Gas Injection

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Fundamentals and Practical Aspects of Gas Injection

Part of the book series: Petroleum Engineering ((PEEN))

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Abstract

This chapter introduces the PVT challenges of gas injection. First, the phase diagram of various gases, oil samples and mixtures of oil and gas are investigated. In the next part, the important PVT experiments are discussed in details. These experiments consist of CCE (constant composition expansion), DL (differential liberation), CVD (constant volume depletion), flash separation and swelling test. Some calculation must be considered for designing the gas injection process as it is discussed in Sect. 2.4. In Sects. 2.5, 2.6 and 2.7, three cases are studied about change of phase behavior due to gas injection, MMP calculation of gas injection and asphaltene precipitation due to gas injection, respectively. The optimum design of gas injection and PVT challenges associated with gas injection are presented in Sects. 2.8 and 2.9, respectively.

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Abbreviations

GIIP:

Gas Initially in place

MMP:

Minimum Miscibility Pressure

fs:

Fugacity

K:

Dispersion coefficient

L:

Reservoir length

m:

Mass of initial gas in-place, lb

Mw:

Molecular Weight, g/gmol

p:

Pressure, psi

R:

Ideal Gas Constant, ft3.psi/lbmol.R

S:

Saturation

SEO:

Enriched oil slug size

Ss:

Solvent slug size

t:

Time

T:

Temperature, °F

V:

Volume, m3 or ft3

vs:

Molar volume of solid phase

x:

Mole fraction

z:

Compressibility factor

bt:

Breakthrough

d:

Dew-point

EO/O:

Enriched-oil and oil

EO/S:

Enriched-oil and solvent

i:

Initial

inj:

Injected

l:

Liquid

O/S:

Oil-Solvent

origin:

Original

rel:

Relative

sat:

Saturation

S/CG:

Solvent and chase gas

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Author information

Authors and Affiliations

  1. Department of Petroleum Engineering, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran

    Reza Azin

  2. Oil and Gas Research Center, Persian Gulf University, Bushehr, Iran

    Amin Izadpanahi

  3. Department of Chemical Engineering, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran

    Shahriar Osfouri

Authors
  1. Reza Azin
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  2. Amin Izadpanahi
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  3. Shahriar Osfouri
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Corresponding author

Correspondence to Reza Azin .

Editor information

Editors and Affiliations

  1. Petroleum Engineering, Persian Gulf University, Bushehr, Iran

    Reza Azin

  2. Researcher, Oil and Gas Research Center, Persian Gulf University, Bushehr, Iran

    Amin Izadpanahi

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Azin, R., Izadpanahi, A., Osfouri, S. (2022). PVT of Gas Injection. In: Azin, R., Izadpanahi, A. (eds) Fundamentals and Practical Aspects of Gas Injection. Petroleum Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-77200-0_2

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  • DOI: https://doi.org/10.1007/978-3-030-77200-0_2

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  • Online ISBN: 978-3-030-77200-0

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