轻质油藏高压注空气技术应用前景分析

 轻质油藏高压注空气提高采收率技术已经被证实是一种行之有效的提高采收率技术,该技术的发展为油田提高采收率开辟了新的道路。本文总结国内外轻质油藏高压注空气技术矿场试验及室内研究技术的发展历程,阐述了目前国内外轻质油藏高压注空气驱油机制的研究现状,明确了注空气实施过程中油藏筛选及评价、工程设计、现场实施三大环节之间的相互关系,并对各个阶段需要实施的主要内容和考虑的关键因素予以详细说明。根据目前国内外提高采收率技术现状,分析了轻质油藏高压注空气技术的特点和优势,指出了对于水驱后油藏或正在进行水驱的油藏、低渗及超低渗注水开发困难的油藏、高温高盐油藏等,轻质油藏高压注空气具有巨大的经济潜力和广阔的应用前景。

High Pressure Air Injection Technique for Light Oil Reservoir: Its Development History and Application Prospect

In recent years, high pressure air injection(HPAI) has been proven as an effective method for enhanced oil recovery from light oil reservoirs. This technique has received considerable attention as a relatively new technique for IOR, and has led to increasing interests from companies for exploring the feasibility of the HPAI project in their reservoir holdings. The development history of HPAI for light oil reservoirs is introduced in terms of the laboratory research and field implementation based on published literatures. The mechanism of HPAI is also presented. In the meantime, the project phases, including candidate reservoirs screening and evaluating, project design, and project implementation, as well as the road-map and key factors for each phase are discussed in detail. An analysis on the characteristics and advantages of HPAI process are also conducted. Along with the current status of existing techniques for EOR, an insight into the large economic potential and the enormous application prospect for HPAI to depleted, water flooded light oil reservoirs, low and ultra-low permeability reservoirs, and high pressure high temperature reservoirs are also provided.