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An Improved predictive tool for liquid in a Gas well

Fadairo, A. S. A. and Femi-Oyewole, Damilola and Falode, Olugbenga (2013) An Improved predictive tool for liquid in a Gas well. SPE international.

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As the search for natural gas becomes increasingly high due to its high demand worldwide, the oil and gas industry is faced with the challenge of liquid loading in gas or condensate wells. It is imperative to properly design and predict the operational parameters necessary for handling flow assurance challenges due to simultaneous flow of gas with liquid. The model of Guo et al is the most recent systematic approach for predicting liquid loading in gas well. However, it did not account for the accumulation and kinetic terms in the momentum energy equation used to estimate bottom-hole pressure in a gas/oiVwater/solid four phase flowing well. The two neglected terms in Guo et al formulation have significant e ffects on the gas well operational parameters such as the minimum gas flow rate for preventing liquid loading. This paper presents an improved model that describes a systematic approach for estimating liquid loading in a gas well without neglecting any term in the fundamental momentum equation. The results obtained showed that at the early production time where initial trans ience at the onset of flow is experienced, the critical gas flow rate obtained from the new model is lower than that predicted from Guo et al model due to inclusion of accumulation term while at the later production time, the critical gas flow rate obtained becomes higher than that predicted from Guo et al model and increases as the transient period elapses. Resu Its further show that at some point during production, the minimum energy required to lift liquids out of the well bore is more than that required at the earlier stage of production. The new model is reasonable, reliable and better when compare with Turner et al and Guo et al models. It is useful for operators to refme their procedures and better manage the risk of liquid loading during natural gas production.

Item Type: Article
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 08 Nov 2013 19:25
Last Modified: 08 Nov 2013 19:25

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