Initial production in the deep water Gulf of Mexico has been underway for nearly 10 years. Secondary recovery methods are now in the planning stage. One of these methods is seawater injection. A number of operators in the North Sea have already started using this technique. Consideration of a water flood brings on the possibility of reservoir souring. For the Gulf of Mexico, a review of the materials of construction for existing wells found that well casing and completions were designed for sweet service, consequently a fitness for purpose testing qualification approach was undertaken. A fitness for purpose approach addressed ~20 ppm H2S in a condensed water phase (1% sodium chloride) and a number of alloys including P110, Q125, 8630M, 4130M. NACE TM 0177 test methods were utilized: uniaxial tests, double cantilever beam (DCB) fracture toughness test and bent beam tests, also known as Sc. Results and discussion are presented.

Subject
Test methods, Materials, Sour environments, Sodium chloride, Tensile tests, Cracking resistance, Acidity, Sodium chloride solution, Tensile stress, Sulfide stress cracking, Alloys, Yield strength, Stress corrosion cracking
Keywords:
H2S, carbon steel, 4130M, 8630M, P-110, sour service
© 2004 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
Association for Materials Protection and Performance (AMPP)
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