Microbiologically influenced souring (MIS) is the production of hydrogen sulfide (H2S) through the metabolic activities of microorganisms1-3 . There is better potential for mitigating MIS in some downhole environments using biocides if the problem is detected early in the souring process. However, if the H2S producing community is allowed to spread into subsurface regions which are less accessible to biocides (profuse-stage MIS), the problem becomes less mitigable by conventional means. Attempts to mitigate profuse-stage MIS in a gas storage field are reported in this paper. A diagnostic strategy for differentiating early-stage MIS from geochemical souring is also reported.

Subject
Hydrogen sulfide, Sulfur, Water, Iron sulfides, Sulfates, Sour gas, Storage, Iron, Manganese, Souring, Phosphates, Biocides, Samples
Keywords:
geochemical souring (GS), microbiologically influenced souring (MIS), sulfate reducing bacteria (SRB), biocides, mitigation
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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