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目前,由于流体在接近井眼附近出现漏失等原因,导致凝析气藏的产量大幅度下降。流体的漏失影响了流向井筒的气量并在一定程度上降低了油藏的总体能量。凝析油的相态行为与岩石相对渗透率相互作用导致油藏流体的组分变化,因为重组分从漏失的液体中分离出来而使气相组分变得更轻。本文将定量地阐述这个结果,对其进行科学的分析,并利用调查结果来控制漏失流体以达到提高产能的目的。通过优化生产压力方案,促使轻质组分在气藏中凝析,从而提高产量。研究利用了实验手段来测量凝析气的流量并对其组分进行数值模拟。通过不同方案的对比,并优化生产次序使凝析气采收率达到最大。实验结果表明,组分变化显著是由于流体的相态变化和生产次序的作用;使用合理的生产方案可提高凝析气藏的采收率,而且通过改变生产次序,也会降低生产损失。通过研究制定气井开始生产时最优生产方案,以减少凝析堆积效应造成的生产损失。
At present, due to the fluid near the hole near the emergence of leakage and other reasons, resulting in a substantial decline in condensate gas production. Fluid loss affects the amount of gas flowing to the wellbore and to a certain extent reduces the overall energy of the reservoir. The interaction between the phase behavior of the condensate and the relative permeability of the rock results in a change in the composition of the reservoir fluid as the heavies separate from the lost liquid to make the gas phase components lighter. This article will elaborate on the results, conduct a scientific analysis of the results, and use the results to control the loss of fluid in order to increase productivity. Through the optimization of production pressure program, prompting light components in the gas condensate, thereby increasing production. The study used experimental methods to measure the condensate gas flow and numerically simulate its components. Through the comparison of different programs, and optimize the production order to maximize condensate recovery. The experimental results show that the composition change is significantly due to the phase change of the fluid and the order of the production sequence. Using a reasonable production scheme can increase the oil recovery of condensate gas reservoirs and also reduce the production loss by changing the production sequence. Through research and development of gas wells to start the production of the optimal production program to reduce the condensate accumulation effect caused by the loss of production.