气体

Minxuan Zhou, M. Imani, Saransh Gupta, Tajana Rosing
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引用次数: 4

摘要

Yufutsu凝析气田为砾岩-花岗岩裂缝性储层。它含有富含凝析油的气体。我们观察到一些奇怪的流体行为。根据储层深度不同的生产区,生产气油比在900 ~ 1900 ~ 1900 m3 / kl之间。根据储层深度不同的生产区域开始采气。天然气生产始于10年前。在生产初期,随着时间的推移,气油比逐渐减小。这种趋势与凝析气藏的正常行为相反。此外,我们还观察到,在某口井的油管中,重质气体存在于轻质气体中。水库的厚度大约在4000米到1000米之间。压力和温度随储层深度的变化范围很大。储层顶部和底部的气体组成差异很大,由于甲烷的热扩散系数大于其他流体行为较重的气体,因此最轻的组分会随着深度和温度的增加而增加。本文综述了上述现象和理论,并报道了目前利用气循环方案提高凝析油采收率的努力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GAS
: Yufutsu gas condensate fi eld has a fractured reservoir which consists of conglomerate and granite. It contains condensate-rich gas. We observed some strange fl uid behaviors. Production gas oil ratio ranges from 900 m 3 /k l to 1,900 m l to 1,900 m l 3 /k l according to production area where reservoir depth is different. Gas production started l according to production area where reservoir depth is different. Gas production started l ten years ago. At the early stage of the production, gas oil ratio decreased with time. This trend is opposite from normal behavior of a gas condensate reservoir. Also, we observed that heavy gas existed on light gas in a tubing at a specifi c well. we The reservoir is approximately from 4,000 m and 1,000 m thick. pressure and temperature are varying in a wide range with the reservoir depth. Gas compositions at the top and the bottom of the reservoir are so different that the lightest component, tends to increase with depth and temperature due to the thermal diffusion because methane has larger thermal diffusion coeffi cient than the other heavier the uid behaviors. This paper reviews the above phenomena and the theory and reports current effort to increase condensate recovery using gas cycling scheme.
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