Phosphonate inhibitors are used for scale and corrosion control in gas and oil production. The fate of scale inhibitor in the oil bearing formation following an inhibitor squeeze has been carefully studied in both laboratory apparatus and actual field squeezes. The effects of acidity, sandstone composition, and brine composition on retention and release of phosphonate from Berea sandstone were evaluated using adsorption/precipitation models. The adsorption of phosphonate on sandstones typically occurred in clay minerals in the range of less than 0.2 mg/g sorption density. More phosphonate is retained in an acid squeeze where a large quantity of Ca and Fe ions are dissolved by the acid.

Subject
Acids, Sandstone, Sand, Phosphonates, Sodium chloride, Solubility, Calcium, Calcite, Effluent, Minerals, Acidity, Sodium chloride solution, Corrosion inhibitors
Keywords:
transport, phosphonate, scale inhibitor, inhibitor squeeze
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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