摘要
牙哈凝析气田采用"循环注气、保压开采"的开发方式4年多以来,已从油藏工程和数值模拟两方面证实了已有2口注气井组发生气窜,但是注入介质朝哪个方向推进、主力驱替方位如何、注入介质前缘波及何处都难以判断。用示踪剂方法存在人为因素很多、精度不够、施工复杂、周期长,而且只能粗略判断。利用注气井气驱前缘监测技术——微地震法对注气井进行监测,可得到该井的气驱前缘、注入气的波及范围、优势注气方向和区块的气体波及区。
The developmental method in yaha condensate gas reservoir is cycle gas injection to maintain formation pressure. Since it has been exploited for more than 4 years, the results of reservoir engineering and simulation have proved that gas channeling happened in one group of gas-injecting wells. But it is difficult to judge the direction of the injected media flowing, the main flooding direction and the swept zone of the injected fluid advancing edge. And the method of the tracer is affected by lots of artificial factors, the accuracy of is lower, execution is complicate, the interval is longer, and the judgement is sketchy. The technique of monitoring the gas injection advancing edge(micro earthquake monitoring the gas injection advancing edge) has been used in yaha condensate gas reservoir, and the gas injection advancing edge, swept zone of injected gas and the better direction of injecting gas are gotten; swept zone in region is a failsafe technical reference to modify the flood pattern, exploit the remaining oil and improve the ultimate recovery factor.
出处
《天然气地球科学》
EI
CAS
CSCD
2005年第3期390-393,共4页
Natural Gas Geoscience
关键词
微地震
气驱前缘
凝析气
注气
波及范围
Micro earthquake
The gas injection advancing edge
Condensate gas
Gas injection
Swept zone.
