川东北地区天然气偏差系数计算方法评价  

The Comprehensive Evaluation of the Deviation Factor Calculation of Natural Gas in Northeast Sichuan

作　　者：熊治富[1] 邓金花[1] 陈丹[1] 

机构地区：[1]中国石化勘探分公司勘探研究院,四川成都610041

出　　处：《西南石油大学学报（自然科学版）》2015年第4期60-66,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05005-003-002)

摘　　要：天然气偏差系数是气藏储量计算中一项非常重要的基础数据,可通过高压物性PVT实测取得,也可以通过计算方法计算求得。针对在川东北地区各计算方法的适用条件及计算精度不是特别明确的问题,开展了各种计算方法的评价研究,研究中利用4种常用计算方法的预测结果分别与Standing-Katz天然气偏差系数图版中不同拟对比压力及拟对比温度下对应的偏差系数及川东北地区实测天然气偏差系数对比分析及评价,获得各种计算方法的适用范围;认为DAK及DPR方法实用范围较宽,有较高的计算精度,适用于川东北地区高温高压条件天然气偏差系数的计算。Natural gas deviation factor is one kind of important data that can be obtained through PVT experiment or calculation methods. Because the applicable conditions and accuracy of its calculation methods are not particularly clear in Northeast Sichuan, evaluation is carried out to study the various calculation methods. Based on the comparative analysis and evaluation on the predictions with four kinds of common calculation methods, deviation factor z-value in Standing-Katz chart under pseudo-reduced pressure and temperature and the measured z-value of natural gas deviation factor in Northeast Sichuan, the scope of various calculation methods is proposed. It is pointed out that both DAK and DPR methods have wide practical scope and higher accuracy, besides, they are applicable to calculate the deviation factor of gas reserves under high temperature and high pressure in northeast Sichuan.

关 键 词：川东北地区 酸性天然气 偏差系数 压缩因子 计算方法 

分 类 号：TE122[石油与天然气工程—油气勘探]