高温低含凝析油凝析气藏含水汽变化规律研究

发布时间：2018-03-17 02:15

本文选题：高温　切入点：低含凝析油　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：凝析气藏在世界油气储量中占据极其重要的地位,随着凝析气藏的不断开发,涌现出许多高温、高压凝析气藏。在常规凝析气藏油气体系相态研究中往往忽略水汽对体系相态行为的影响,含水汽凝析气藏的相态特征及水汽对凝析气藏相态特征的影响尚不明确。本文研究的Y-C高温低含凝析油凝析气藏在生产过程中忽略了地层水的影响,导致无法准确的了解实际生产过程中油气相态变化及水汽对气田开发的影响。针对上述问题,本文进行了系统性的实验研究,并且研制了凝析气相态软件;利用研制的凝析气相态软件对高温低含凝析油凝析气藏含水汽规律进行了模拟。本文的研究对合理利用和开发高温低含凝析油凝析气藏资源,以及准确分析凝析气藏含水汽变化都具有一定指导作用。本文首先进行了含水汽凝析气藏地层流体相态实验,分析了水汽含量对凝析气体系的相态行为的影响;通过气田水汽含量变化规律测试,得到了气田水汽含量与CO2含量、压力、重质组分的关系,为下一步凝析气藏相态软件的研制与测试提供了必要参数。通过引入新的算二元交互作用系数计算方法,研制了凝析气相态软件,并应用新的软件对Y-C高温低含凝析油凝析气藏含水规律进行了预测,得到了气田的含水汽变化规律。研究表明,凝析气中水汽含量随压力、CO2含量、温度等的升高不断增大;N2含量的增加会使凝析气水汽含量降低;重烃含量增加会使水汽含量先增加后降低。
[Abstract]:Condensate gas reservoirs play an extremely important role in the world's oil and gas reserves. With the continuous development of condensate gas reservoirs, many high temperatures have emerged. In conventional condensate gas reservoirs, the influence of water vapor on system phase behavior is often neglected in the study of phase behavior of oil and gas systems in conventional condensate gas reservoirs. The phase behavior characteristics of water-vapor condensate gas reservoir and the effect of water vapor on the phase behavior of condensate gas reservoir are not clear. The Y-C high temperature and low condensate condensate gas reservoir studied in this paper has neglected the influence of formation water during the production process. As a result, it is impossible to accurately understand the change of oil and gas phase and the influence of water vapor on the development of gas field during actual production. In view of the above problems, a systematic experimental study is carried out in this paper, and a condensate gaseous state software is developed. The water vapor law of high temperature and low content condensate condensate gas reservoir is simulated by using the condensate gas phase software developed in this paper, and the reasonable utilization and development of high temperature and low content condensate condensate gas reservoir resources are studied in this paper. And accurate analysis of water vapor change in condensate gas reservoirs has a certain guiding role. Firstly, the formation fluid phase behavior of water vapor condensate gas reservoir is tested, and the effect of water vapor content on the phase behavior of condensate gas system is analyzed. The relationship between water vapor content of gas field and CO2 content, pressure and heavy component is obtained by testing the variation law of water vapor content in gas field. The necessary parameters are provided for the development and testing of phase state software for condensate gas reservoirs. By introducing a new method to calculate the binary interaction coefficient, the condensate gas phase state software is developed. The new software is used to predict the water cut of Y-C condensate gas reservoir at high temperature and low content of condensate oil, and the variation law of water vapor in gas field is obtained. The results show that the water vapor content in condensate gas varies with pressure and CO _ 2 content. The increase of temperature and N _ 2 content will decrease the water vapor content of condensate gas, and the increase of heavy hydrocarbon content will make the water vapor content increase first and then decrease.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE372

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