Estimated about ~3 million bbls/day, the Brazil oil field plays a significant part in the South American unconventional thriving, especially in current global oil supply constrains due to Ukraine crise. The oil field located in subsea Latin America, produces a large amount of heavy oil in the range of 16 to 24° API. The water composition is characterized with high chloride and high total dissolved solids (TDS), posing integrity and flow-assurance challenges to the operating asset. To mitigate the corrosion and scale reparations in deep-water environment through limited injection points, a combined corrosion and scale inhibitor was demanded.

The acquiesced CI/SI combined product was synergistically blended with corrosion inhibitor actives and scale inhibitor for corrosion control and scale prevention. Followed Clariant’s deep-water qualification process and client’s chemical qualification protocols, the CI/SI combined product, MTDF-9339 was designed and focused on the performance of the CI/SI product’s partitioning efficiency in heavy crudes for both CI and SI inhibitor molecules. Lab results showed MTDF-9339 passed all mandatory tests and will be conducted for field trials in early 2023. The performance tests include RCE, HPRCA, LPR-RCA, Film Persistency, Dynamic scale loop, scale inhibition, chemical partition tests. The secondary performance tests include thermal stability, brine & oil compatibility, foaming tendency, emulsion tendency, material compatibility tests and so forth. This paper discusses the laboratory testing and deep-water qualification in evaluating MTDF-9339.

Subject
Risers, Pits, Stability, Test methods, Water, Precipitation (solids), Viscosity, Scale inhibitors, Stress, Corrosion scales, Crude, Corrosion coupons, Oil
Keywords:
Corrosion inhibitor, scale inhibitor, combined production chemical, deep-water production chemical, subsea production chemicals
© 2023 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).
2023
Association for Materials Protection and Performance (AMPP)
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