A horizontal water-injection well with a limited-entry-liner (LEL) completion in an onshore Middle East carbonate reservoir was stimulated with hydrochloric acid (HCl) using a large volume of a viscoelastic diverter-acid (VEDA) fluid system ahead of the main acid stage. The VEDA stage was needed to deliver sufficient acid volumes to the toe of the well, resulting in a significant increase to the injectivity index and more-even distribution of injected water across the horizontal drain.
LEL Characteristics
The LEL is a lower completion type designed for openhole wells. It consists of an array of small, unevenly spaced holes placed along a string of blank pipes. Swell packers typically are placed along the LEL completion to divide the lateral into compartments.
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