THE APPLICATION OF MICRO EARTHQUAKE MONITORING THE GAS INJECTION ADVANCING EDGE IN THE YAHA CONDENSATE GAS RESERVOIR
微地震监测气驱前缘技术在牙哈凝析气田的应用

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.