新疆柯克亚凝析气田循环注气调整措施与开发效果

摘要

Beacause the Kekeya condensate gas field in Xinjiang Province suffered a blowout destruction of three wells in the initial stage of exploration and the successive natural de pletion production for ten years, its formation pressure was greatly declined and underground retrcgrade condensation was serious, which made a large number of condensate be detained in reservoir,so that its development effectiveness was bad. Carried out in September 1994, a precursory test of circulating gas injection in C51(3)gas reservoir effectively contained the underground rnretrograde condensation of heavy components in condensate gas. Through timely adjusting the gas production, injection-produc tion ratio and well pattern in gas injection process, the recovery percent of condensate was raised from 21% in natural depletion production to 37.9 %, so that its development effectiveness was good.%新疆柯克亚凝析气田经历勘探初期3口喷井的破坏和其后十年的衰竭式开采，地层压力大幅下降，地下反凝析现象严重，大量滞留在地层中的凝析油无法采出，开发效果差。1994年9月实施的西五一(3)气层组循环注气先导试验，有效地遏制了凝析气中重质组分在地下的反凝析，并通过注气过程中适时进行采气量、注采比和井网三方面的调整，使得凝析油采出程度较衰竭式开采方式的21％提高到37．9％，开发效果显著。