收稿日期: 2012-10-24
修回日期: 2012-11-13
网络出版日期: 2013-08-10
基金资助
国家科技重大专项“塔里木盆地库车前陆冲断带油气开发示范工程”（编号:2011ZX05046）资助.
Comparison and Development of Predictive Models for Dew Point Pressure of Gas Condensate Reservoir Fluids
Received date: 2012-10-24
Revised date: 2012-11-13
Online published: 2013-08-10
凝析气田的开发需要准确的凝析气藏流体相态性质数据，其中露点压力的快速、准确预测对于凝析气的工业开采非常重要。对比分析了现有凝析气藏流体露点压力关联式的优缺点，并从凝析气藏流体本身的特性出发，通过实测数据资料拟合，建立了综合气藏温度、组成、C7+组分性质的凝析气藏流体露点压力预测关联式。对14组国内不同地区凝析气藏流体样品的露点压力预测结果对比表明，新关联式的绝对平均偏差为1.24%，精度远高于其他经验关联式和状态方程模型，并且适用于甲烷摩尔组成为65.59%～93.09%，气油比为1 002～63 377m3/m3的较广阔范围的凝析气藏流体。
王海应，刘煌，昌伦杰，魏聪，王海波，孙长宇 . 凝析气藏流体露点压力预测模型对比与开发[J]. 天然气地球科学, 2013 , 24(4) : 853 -858 . DOI: 10.11764/j.issn.1672-1926.2013.04.853
The exploitation of gas condensate reservoir needs accurate phase behavior data,especially the dew point pressures of gas condensate reservoir fluid.By considering the characteristics of gas condensate reservoirs and analyzing the merits and demerits of the existing correlations in literatures for dew point pressures,a new empirical model for predicting the dew point pressures of gas condensate reservoirs was developed,which involving the parameters of the reservoir temperature,gas composition,and C7 plus component properties.Fourteen groups of gas condensate samples from different areas in China were selected to examine the applicability of this new correlation by comparing with several other correlations and thermodynamic models.The results show that the total average absolute deviation of this new developed model is only 1.24%,much better than those calculated by other methods in literatures.The new model also has a wide application range,with methane composition of 65.59%~93.09% and gas-oil ratio for gas condensate reservoir of 1 002~63 377m3/m3.
Key words： Gas condensate reservoir; Dew point pressure; Phase behavior; Correlation
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