
摘要:水气交替注入(WAG)技术是一种提高油藏采收率的有效方法,已经在多种类型的油藏中得到广泛应用。本文综述了WAG技术的不同类型和驱油机理,分析了影响WAG技术效果的主要因素,探讨了WAG技术面临的挑战和对策,并提出了未来的研究方向。本文首先介绍了WAG技术的发展背景和研究意义,然后根据注入方式、流体类型和混相状态对WAG技术进行了分类,并分别阐述了各类WAG技术的优缺点和驱油机理。接着,本文讨论了水的矿化度、滞后效应、油藏非均质性、润湿性和WAG比例等因素对WAG技术效果的影响。此外,本文还分析了WAG技术在实施过程中遇到的气体提前突破、设备问题和沥青质沉积等挑战,并提出了相应的解决措施并指出了未来的研究方向。
Abstract: Hydrogas
alternating injection (WAG) technology is an effective method to enhance
reservoir recovery, which has been widely used in many types of reservoirs. In
this paper, the different types and displacement mechanisms of WAG technology
are reviewed, the main factors affecting the effect of WAG technology are
analyzed, the challenges and countermeasures of WAG technology are discussed,
and future research directions are proposed. This paper first introduces the
development background and research significance of WAG technology, then
classifies WAG technology according to injection mode, fluid type and miscible
state, and explains the advantages, disadvantages and oil displacement
mechanism of various WAG technologies. Next, the effects of water salinity,
hysteresis effect, reservoir heterogeneity, wettability and WAG ratio on the
WAG technology effect are discussed. In addition, this paper analyzes the
challenges of gas early breakthrough, equipment problems and asphaltene
deposition encountered in the implementation of WAG technology, and puts
forward corresponding solutions and points out future research directions.
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