An efficient optimization and design method has been proposed and developed for Enriched-gas Water-Alternating-Gas (EWAG) injection process. The proposed technique is able to quantitatively determine the sizes of the enriched-gas slug and water slug for each cycle of the water-alternating-gas (WAG) injection process, as well as the total number of injection cycles. Applying this method provides the opportunity to implement the WAG scenario more efficient and economical. The numerical simulation showed that in comparison with other conventional WAG scenarios with traditional optimization approach, the EWAG has the obvious advantages of evaluation of indices, such as the oil recovery factor and cumulative net cash flow.

中文翻译：

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富气驱不同采出气密度优化水气注水工艺

针对富气水交替气 (EWAG) 注入工艺提出并开发了一种有效的优化和设计方法。所提出的技术能够定量确定水交替气体 (WAG) 注入过程的每个循环的富气段塞和水段塞的大小，以及注入循环的总数。应用此方法提供了更高效、更经济地实施 WAG 场景的机会。数值模拟表明，与采用传统优化方法的其他常规WAG情景相比，EWAG在采油率、累计净现金流等指标评价方面具有明显优势。