凝析气顶油藏复杂气窜问题研究  

Research on complex gas channeling in reservoir with condensate gas cap

作　　者：喻莲[1,2] 赵文琪 陈礼 王桐[1] 

机构地区：[1]中石化石油勘探开发研究院,北京100083 [2]中油勘探开发研究院,北京100083

出　　处：《特种油气藏》2013年第4期110-112,156,共3页Special Oil & Gas Reservoirs

基　　金：中国石油天然气集团公司科技攻关项目"提高让纳若尔大型复杂碳酸盐岩油藏高效注水开发配套技术研究"(04b60202)

摘　　要：研究气窜现象及准确计算油、气产量对改善开发效果和提高油气采收率具有重要意义。凝析油气藏气窜的研究方法不同于常规油气藏,而分析凝析油气藏2次气窜问题更为复杂。针对某区域凝析油气藏油井发生的2次气窜情况,以油气水流动特征、反凝析特征研究为基础,运用生产气油比法,结合多种方法相互印证,确定了气窜特征和气窜类型,进而推导出了计算凝析油气藏气窜量的物质平衡法。研究表明,该方法对于研究中高凝析油含量的油气藏具有很好的适应性。Researches on gas channeling and accurate calculation of oil and gas production are critical to improving development efficiency and recovery factor.The methodology for gas channeling in condensate reservoir is different from conventional reservoirs;moreover it is more complex to analyze secondary gas channeling.A case of secondary gas breakthrough in oil wells of a condensate reservoir has been studied for the characteristics and types of gas channeling based on oil / gas / water flow and retrograde condensation by using produced GOR and mutual verification of various methods;and a material balance method has been derived for calculating gas breakthrough volume in condensate reservoirs.The study shows that this method is adaptable to reservoirs with medium-high condensate oil content.

关 键 词：凝析气顶油藏 2次复杂气窜 气窜量计算 气窜特征和类型 物质平衡法 

分 类 号：TE349[石油与天然气工程—油气田开发工程]