Mechanism of Eliminating Retrograde Condensate Damage in Gas Condensate Well by Methanol Injection Process

Xinjiang Petroleum Geology ›› 2007, Vol. 28 ›› Issue (2): 207-209.

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Mechanism of Eliminating Retrograde Condensate Damage in Gas Condensate Well by Methanol Injection Process

SHI De-pei¹, LI Xiang-fang¹, LIU Hua¹, SUN Lei²

1. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
2. Institute of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2006-06-11 Revised:2006-09-15 Online:2007-04-01 Published:2020-07-31

Abstract

Abstract: By using PR state equation, the gas compositional fugacity is calculated, and the gas-liquid equilibrium model for hydrocarbonmethanol system is developed to simulate the phase behavior of this system in order to reveal the mechanism of eliminating retrograde condensate damage near wellbore in gas condensate well by methanol injection process. The study shows that the dew point pressure of this system can be reduced with increase of injected methanol amount in gas condensate well under the real initial temperature and pressure; the condensate saturation in constant composition expanding process will be cut down and the retrograde condensate amount and condensate viscosity are obviously decreased in constant volume depletion process. It is concluded that methanol as an effective solvent for eliminating the retrograde condensate damage is of re-vaporizing effect on condensate oil.

Key words: methanol, gas condensate, retrograde condensate, damage, contamination, phase equilibrium

CLC Number:

TE372

SHI De-pei, LI Xiang-fang, LIU Hua, SUN Lei. Mechanism of Eliminating Retrograde Condensate Damage in Gas Condensate Well by Methanol Injection Process[J]. Xinjiang Petroleum Geology, 2007, 28(2): 207-209.

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Mechanism of Eliminating Retrograde Condensate Damage in Gas Condensate Well by Methanol Injection Process

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