凝析气藏微观渗流实验研究

认清近井地带凝析油形成、分布及流动规律，可以为凝析气藏的开采提供重要的理论依据。文章给出了一种通过微观渗流实验研究近井地带凝析油分布及流动规律的实验方法，用具有与真实储层相似的孔隙结构微观仿真玻璃模型模拟地层孔隙介质，并在高温高压条件下观测凝析气液在模型中分布与流动规律。微观实验研究结果表明，凝析油容易聚集在小孔道、喉道、部分死孔隙以及孔壁表面，并逐渐演化形成段塞，而大孔道中凝析油不容易聚集。凝析油主要有携带、贴壁爬行、段塞流等3种流动方式。

STUDY ON MICROSCOPIC PERCOLATION EXPERIMENTS FOR CONDENSATE GAS RESERVOIRS 1)

It can provide important theoretical basis for exploitation of condensate gas reservoirs to understand the generation, distribution and flowing law of condensate oil. An experimental method is proposed to study the distribution and flowing law of condensate oil in the zones near the borehole. The microscopic phantom glass model with similar pore structure as the real reservoir is used to simulate the porous media of the reservoir, and the distribution and flowing law of condensate liquid is observed in the model under high temperature and pressure. The study results show the condensate oil accumulates at the small pores, pore throats, some death pores and pore walls easily, and gradually evolves to form plugs. It is difficult for condensate oil to accumulate at big pores. The flowing manner of condensate oil mainly includes the three types of schlep by gas, crawls along pore walls and plug flow.