注干气开发凝析气藏注采压力系统研究——以塔里木盆地大涝坝2号构造凝析气藏为例  

Study on injection-production pressure system for developing condensate gas reservoir via cycling dry gas-case study of Dalaoba No.2 structure condensate gas reservoir

作　　者：彭松[1] 黄全华[1] 杨翠萍[1] 赵习森[2] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石化股份西北油田分公司雅克拉采气厂,新疆库车842017

出　　处：《油气地质与采收率》2011年第2期76-79,116,共4页Petroleum Geology and Recovery Efficiency

基　　金：油气藏地质及开发工程国家重点实验室开放基金项目"复杂裂缝性油气藏开采动态预测"(PLN0126)

摘　　要：为有效提高凝析油的采收率,获得更大的经济效益,在开发凝析油含量较高的凝析气藏时多采用注干气保压方式。注干气开发凝析气藏时,对注采压力系统的研究尤其重要,但相关的技术方法较少。经过研究,建立了一种用于分析注采压力系统的方法:以系统测试资料为基础,利用一点法公式、无阻流量与地层系数的关系,确定出气藏的平均产气能力及注气能力方程,再结合垂直管流方程、液滴重力平衡方程对注干气开发凝析气藏注采压力系统进行研究。以塔里木盆地大涝坝2号构造凝析气藏为例,对注干气开发该气藏时的注采压力剖面、注采平衡系统、废弃压力及停喷压力进行了计算与分析。实例应用结果表明,该方法简便实用。The commercial value of condensate gas reservoir is much higher. Maintaining formation pressure by cycling dry gas, enhancing condensate oil recovery effectively for more economic benefit, is a commonly used method in developing the condensate reservoir with high oil content. When condensate gas reservoir is developed by cycling, the importance of analyzing injection-production pressure system is extremely obvious, however, the published relevant technique methods are few. Herein, the author developed a method to analyze injection-production pressure system. Based on test data of wells system, the author firstly set up the average gas deliverability and injection ability equations by the single point method formula and the related expression of AOF and formation capacity, then the average equations is used to construct vertical conduit flow model and blob gravity balance model, so as to analyze the performance of injection-production pressure system of developing condensate gas reservoir via cycling dry gas. Furthermore, we take Dalaba No.2 structure condensate gas reservoir as example to check the developed method, and then analyzed the pressure profile, injection withdrawal balance system, abandonment pressure and quit flowing pressure of this reservoir. The performance of field application indicates that the method herein is simple, convenient and practical.

关 键 词：注气 凝析气藏 压力系统 平均产能方程 注采平衡 

分 类 号：TE372[石油与天然气工程—油气田开发工程]