牙哈凝析气田气窜模式与调控技术  

Gas Breakthrough Patterns and Modification Technology in Yaha Gas-condensate Reservoir

作　　者：苗继军 王永红 李旭[2] 孙太荣 

机构地区：[1]中国石油休斯敦技术研究中心,北京100007 [2]塔里木油田,新疆库尔勒841000

出　　处：《天然气地球科学》2014年第1期124-129,共6页Natural Gas Geoscience

摘　　要：牙哈凝析气田经过11年的循环注气部分保压方式开采,各项开发指标均优于开发方案,取得了非常好的开发效果,但近年来气窜井逐渐增多,控制气窜、稳定气油比成为气田开发调控的主要目标。基于牙哈凝析气田注入气在地层中的流动主要遵循组分梯度理论的认识,通过生产动态监测、示踪剂监测与井间调控以及修井测试等方法和技术,分析总结出现有注采井网下存在低注高采、高注低采和跨高点两翼注采等3种气窜模式,并以此基础开展控窜措施试验,通过优化注采井网和封堵上部生产层段的方法,使得气油比上升速度得到有效控制,达到了凝析油稳产的目的。Yaha gas-condensate reservoir has been developed for eleven years by reinjecting dry gas to keep the formation pressure partially, each development indexes are better than those of ODP expected, it has good development effect. But the gas breakthrough wells increase gradually, thus the purpose of develop- ment modification is to limit gas breakthrough and level off the GCR. Under the discovery that the mobility of injection gas in formation is controlled by component gradient for YaHa gas-condensate reservoir, the technologies of production log, tracer monitoring, and well interventions was conducted to probe the pat- terns of gas breakthrough. Three gas breakthrough patterns was discovered based on current injector and producer patterns,namely injection in lower part and production in higher part,injection in higher part and production in lower part,and production and injector separated by structural high. Based on the discovery, gas breakthrough limitation method test was conducted on one site. After isolating the upper perforated layer or adjusting the producer and the injector,GCR declined obviously and kept smooth for long time.

关 键 词：凝析气田 循环注气 气窜 气油比 重力分异 

分 类 号：TE34[石油与天然气工程—油气田开发工程]