裂缝性油藏注CO_2物质平衡方程的建立与应用  

Establishment and application of material balance equation in CO_2 injection of fractured reservoirs

作　　者：丁景辰[1] 

机构地区：[1]中国石油大学(北京)教育部石油工程重点实验室,北京102249

出　　处：《断块油气田》2014年第2期213-216,共4页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目"超深层油气藏岩石垂向分布规律及渗流特征研究"(50874114)

摘　　要：注气开发,特别是注CO2开发,已经成为提高油藏采收率的重要手段之一。以往这种开发方式主要应用于常规油藏中,目前也开始逐渐应用于裂缝性油藏的开采。裂缝性油藏中的注气过程与非裂缝性油藏有很大区别,文中在常规油藏物质平衡的基础上,考虑注入气在裂缝和基质孔隙双重介质中的渗流和CO2的溶解,建立了裂缝性油藏的注气开采模型,进而建立了裂缝性油藏注CO2物质平衡方程。实例验证表明,本文所建物质平衡方程可以准确地拟合注CO2开发的裂缝性油藏的基质和裂缝储量,并为注CO2开发裂缝性油藏的方案编制提供有效依据。Gas injection, especially CO2 injection, has been one of the most important ways to enhance oil recovery. This kind of development method was mainly applied in conventional reservoirs in the past. But it has now been more and more applied in fractured reservoirs. Gas injection process in fraetured reservoirs is quite different from that in non-fractured rescrvoirs. In this paper, on the basis of the material balance calculating method of conventional rescrviors, the gas flow and the dissolution of CO2 in fracture and matrix pore dual：media reservoirs have been taken into account to establish a CO2 injection model in fractured rc, servoirs, and the material balance equation of CO2 injection in fractured reserwfirs has been established as well. Finally, the results of the example validations indicate thai the material balance equation established in this paper can accurately fit with the reserves of fracture and matrix systems in CO2 injection fractured resin＇volts. The material balance equation can provide basis for compiling CO2 injection scheme.

关 键 词：裂缝性油藏 注CO2开发 物质平衡方程 地质储量 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]