EVALUATION OF RETROFIT GAS LIFT (RGL) SYSTEM APPLICATION IN FIELD X

X field was preliminarily developed as a gas field so the early wells were designed without artificial lift and expected to flow naturally. In addition to gas production, this field is also producing condensate, oil, and water. As the wells continuously produce and reservoir pressure is depleted, oi...

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Bibliographic Details
Main Author: (NIM : 22214027), AFIF
Format: Theses
Language:Indonesia
Online Access:https://digilib.itb.ac.id/gdl/view/20785
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Institution: Institut Teknologi Bandung
Language: Indonesia
Description
Summary:X field was preliminarily developed as a gas field so the early wells were designed without artificial lift and expected to flow naturally. In addition to gas production, this field is also producing condensate, oil, and water. As the wells continuously produce and reservoir pressure is depleted, oil/condensate/water accumulation in the wells cause greater hydrostatic pressure which gradually reduces the ability of the well to flow until the point at which it loads up, dies, and must be shut-in. Well re-activation then becomes a major challenge since these loaded-up wells still have significant hydrocarbon potential. In this condition, artificial lift is required to help lifting the fluid to surface so the wells regain production capability. <br /> <br /> <br /> Considering the types of existing well completions, gas availability in X field for gas injection, and costs of recompletion to install conventional artificial lift methods, Retrofit Gas Lift (RGL) system was considered to be the best option for the wells. RGL is a type of gas lift system that can be installed in the existing production tubing. This eliminates high cost rig workover operations to retrieve the existing completion and install an alternative. Furthermore, with RGL, the gas injection point can be placed as deep as possible by utilizing coiled tubing or a macaroni string to deliver gas injection close to perforation intervals, which was the best solution for loaded-up wells in X field. <br /> <br /> <br /> RGL project has completed in five wells in field X. Two were shut-in wells and the other three were active wells. In this thesis, the author will describe the load up problem in the field X, the design, and installation of RGL. Subsequently, author perform an evaluation on the installed RGL configuration and well performance post RGL installation, and conclude the impact of RGL installation on solving field X production issue and enhance field’s hydrocarbon recovery.