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就地燃烧或火驱法已经展开了深入的研究,并被广泛地应用于稠油油藏。尽誊在稠油油藏注空气驱提高采收率取得了很大的成功,且就地燃烧方法获得了很高的成效,但是相对于蒸汽驱,由于较高的资金成本和复杂的工艺,所以尚未得到广泛应用。在稠油油藏实施中,注入的空气主要用作粘性还原剂。轻质油藏水驱后注空气或就地燃烧在技术上具有可行性,但是从经济效益角度考虑,前景不容乐观。空气是一种低成本的注入剂。与稠油油藏不同的是,影响采收率的基本因素不再是降低粘度。事实上空气注入轻质油藏所起的作用取决于具体情况。在高温高压深油藏中,除了传统的燃烧方法外,二次和三次采油都能产生独特的技术、经济效益。本文阐述了实验和数值模拟工作及水驱轻质油藏注空气的最佳试验方案,并讨论了提高采收率的有利条件和操作规范。
In-situ combustion or fire flooding has been conducted in-depth study, and is widely used in heavy oil reservoirs. Despite the great success achieved in injection recovery by injection of air flooding in heavy oil reservoirs, the in-situ combustion method has achieved very good results. However, due to the higher capital cost and complicated process compared with steam flooding, So it has not been widely used. In heavy oil reservoir practice, the injected air is primarily used as a viscous reductant. It is technically feasible to inject air into the light-weight reservoirs or to burn them in-situ after water-flooding. However, the economic outlook is not optimistic. Air is a low cost injection. Unlike heavy oil reservoirs, the fundamental factor affecting oil recovery is no longer viscosity reduction. The fact that air is injected into light reservoirs depends on the circumstances. In the deep reservoirs of high temperature and pressure, in addition to the traditional combustion methods, secondary and tertiary recovery can produce unique technical and economic benefits. In this paper, the experimental and numerical simulation work and the best experimental scheme of air injection in light water flooding light reservoirs are described. The favorable conditions and operational practices for enhancing oil recovery are discussed.