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Isolation Barrier Valves Installed Successfully in Deepwater Gulf of Guinea

A major operator manages multiple deepwater projects in the Gulf of Guinea. This paper describes one of these, a recent 44-well project. The operator required an ISO 28781-qualified bidirectional subsurface isolation barrier valve (IBV) to be installed in each well. This paper presents the results of the IBV deployment in the field.

Introduction

The Egina field was discovered in 2003 in Oil Mining Lease 130 located in deep water (1150–1750 m) approximately 200 km offshore Port Harcourt, Nigeria.

Subsurface IBVs have become commonplace in lower-sandface-­completion installations. The potential time and operational cost savings are well understood. However, industry concerns remain regarding the ability of these devices to operate reliably in demanding wellbore conditions.

The primary challenges for this project were

  • Deviated wells with horizontal drains, high dogleg severity, and azimuth changes
  • Isolation of different reservoirs along each drain
  • Faults
  • Running the upper completion in sieved nonaqueous-based mud (NABM)
This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 28453, “Egina Deepwater Development: Isolation-Barrier-Valve Case Study,” by G. Forrest, C. Morand, K. Johnson, and V. Okengwu, Halliburton, and V. Chaloupka, SPE, Total, prepared for the 2018 Offshore Technology Conference Asia, Kuala Lumpur, 20–23 March. The paper has not been peer reviewed. Copyright 2018 Offshore Technology Conference. Reproduced by permission.
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Isolation Barrier Valves Installed Successfully in Deepwater Gulf of Guinea

01 May 2019

Volume: 71 | Issue: 5

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