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Effective Well-Integrity Management in a Mature Sour-Oil Field

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A large mature onshore Saudi Arabian oil field is producing sour crude oil that multiplies well-integrity challenges. A stringent well-integrity-surveillance and maintenance program is followed for this field. Under this program, any well-integrity-related problem can be predicted through a structured preventive-diagnosis and maintenance schedule for both wellhead and downhole integrity.

Introduction

The Ghawar oil field has moderate-to-high hydrogen sulfide (H2S) and carbon dioxide (CO2) content that is dissolved in crude oil, which demands a very stringent well-integrity program. The well-integrity-­surveillance program is a mechanism that is applied to the wells in this onshore oil field to ensure the quality and soundness of all completion components. The developed program not only ensures the identification of well problems at a very early stage but also maintains the soundness and upkeep of all the assets in the field. Data obtained from the monitoring program are used for integrity evaluation that in turn leads to deciding the type of well work required for integrity control and repair and when to perform it. The majority of the well work is cost-intensive, and a sound integrity evaluation is key to its success.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 16767, “Effective Well-Integrity Management in a Mature Sour-Oil Field,” by Abdulaziz A. Al-Mukhaitah and Surajit Haldar, SPE, Saudi Aramco, prepared for the 2013 International Petroleum Technology Conference, Beijing, 26–28 March. The paper has not been peer reviewed. Copyright 2014 International Petroleum Technology Conference. Reproduced by permission.
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Effective Well-Integrity Management in a Mature Sour-Oil Field

01 January 2015

Volume: 67 | Issue: 1

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