### Abstract

Original language | English |
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Title of host publication | 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 |

Subtitle of host publication | Changing Frontiers: Incorporating SPE EUROPEC 2013 |

Publisher | EAGE |

Pages | 4327-4331 |

Number of pages | 5 |

ISBN (Print) | 9781629937915 |

DOIs | |

Publication status | Published - 10 Jun 2013 |

Event | 75th EAGE Conference & Exhibition incorporating SPE EUROPEC - London, United Kingdom Duration: 10 Jun 2013 → 13 Jun 2013 |

### Conference

Conference | 75th EAGE Conference & Exhibition incorporating SPE EUROPEC |
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Country | United Kingdom |

City | London |

Period | 10/06/13 → 13/06/13 |

### Fingerprint

### Cite this

*75th European Association of Geoscientists and Engineers Conference and Exhibition 2013: Changing Frontiers: Incorporating SPE EUROPEC 2013*(pp. 4327-4331). EAGE. https://doi.org/10.3997/2214-4609.20130187

**Application of Two-phase Pseudo-pressure in Gas-condensate Well-testing With and Without Positive Coupling and Inertia.** / Hamdi, Hamidreza; Ghahri, Panteha; Costa Sousa, Mario; Corbet, Patrick.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*75th European Association of Geoscientists and Engineers Conference and Exhibition 2013: Changing Frontiers: Incorporating SPE EUROPEC 2013.*EAGE, pp. 4327-4331, 75th EAGE Conference & Exhibition incorporating SPE EUROPEC, London, United Kingdom, 10/06/13. https://doi.org/10.3997/2214-4609.20130187

}

TY - GEN

T1 - Application of Two-phase Pseudo-pressure in Gas-condensate Well-testing With and Without Positive Coupling and Inertia

AU - Hamdi, Hamidreza

AU - Ghahri, Panteha

AU - Costa Sousa, Mario

AU - Corbet, Patrick

PY - 2013/6/10

Y1 - 2013/6/10

N2 - Well-test interpretation in gas condensate system is particularly challenging when condensation happens within the reservoir. This is not only due to the natural reduction of near wellbore mobilities, but also the existence of the velocity effects (i.e. positive coupling and inertia), which compete to revamp the relative permeabilities. In this study, a set of realistic build-up tests are generated using a compositional reservoir simulator, where measured (velocity dependent) relative permeabilities and a real gas condensate fluid model are used. The transient build-up tests are analysed using the real-gas and steady-state two-phase pseudo-pressures, and the (velocity dependent) reservoir integral transforms. The results show that the application of steady-state two-phase pseudo-pressure transform can result in a remarkable over-prediction of the reservoir permeability, when the velocity dependent relative permeabilities are in effect. Moreover, the traditional real-gas pseudo-pressure transform fails to estimate the reservoir properties particularly when the reservoir is initially below the dew point pressure. However, in either of situations (i.e. with and without velocity effects), using the reservoir integral transform leads to an excellent liquid analogy solution, where the reservoir properties can be accurately estimated.

AB - Well-test interpretation in gas condensate system is particularly challenging when condensation happens within the reservoir. This is not only due to the natural reduction of near wellbore mobilities, but also the existence of the velocity effects (i.e. positive coupling and inertia), which compete to revamp the relative permeabilities. In this study, a set of realistic build-up tests are generated using a compositional reservoir simulator, where measured (velocity dependent) relative permeabilities and a real gas condensate fluid model are used. The transient build-up tests are analysed using the real-gas and steady-state two-phase pseudo-pressures, and the (velocity dependent) reservoir integral transforms. The results show that the application of steady-state two-phase pseudo-pressure transform can result in a remarkable over-prediction of the reservoir permeability, when the velocity dependent relative permeabilities are in effect. Moreover, the traditional real-gas pseudo-pressure transform fails to estimate the reservoir properties particularly when the reservoir is initially below the dew point pressure. However, in either of situations (i.e. with and without velocity effects), using the reservoir integral transform leads to an excellent liquid analogy solution, where the reservoir properties can be accurately estimated.

U2 - 10.3997/2214-4609.20130187

DO - 10.3997/2214-4609.20130187

M3 - Conference contribution

SN - 9781629937915

SP - 4327

EP - 4331

BT - 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013

PB - EAGE

ER -