中东陆上碳酸盐岩油藏中的一口水平注水井采用有限入口衬管 (LEL) 完井，在注水前使用大量粘弹性分流酸 (VEDA) 流体系统使用盐酸 (HCl) 进行增产。主要酸阶段。 VEDA 级需要向井趾输送足够的酸量，从而显着提高注入指数，并使注入水在水平排水管上分布更加均匀。
LEL 是专为裸眼井设计的下部完井类型。它由沿着一串空管放置的一系列间隔不均匀的小孔组成。膨胀封隔器通常沿着 LEL 完井放置，以将侧管划分为多个隔室。
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.
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.
