Current drain from the subsea CP system to wells has been investigated for two different fields in the North Sea, using a boundary element modeling technique. The study comprises the effect of various parameters such as interference between wells, soil resistivity, casing resistivity, boundary conditions and the lifetime of the CP design. The results show that the calculated current drain agrees well with short time field experience, but that the current drain is considerably reduced with time.

Subject
Electric current, Geometry, Seabed, Soil resistivity, Boundary conditions, Corrosion modeling, Anodic current, Electric potential, Well casings, Risk reduction, Soil, Electrolytes, Anodes
© 1998 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).
1998
Association for Materials Protection and Performance (AMPP)
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