CO_2注入对原油高压物性影响的理论模拟和实验研究  

THEORETICAL SIMULATION AND EXPERIMENTAL STUDY OF THE INFLUENCE OF CO_2 INJECTION ON PVT OF CRUDE OIL

作　　者：郭平[1] 孙良田[1] 李士伦[1] 熊钰[1] 孙雷[1] 彭鹏商[2] 岳陆 

机构地区：[1]西南石油学院 [2]中原石油勘探开发科学研究院

出　　处：《天然气工业》2000年第2期76-79,共4页Natural Gas Industry

摘　　要：膨胀试验作为单井吞吐工艺试验的重要评价手段之一 ,在油田注CO2 混相驱试验中已得到应用 ,然而关于注气后原油物性参数的变化规律虽然已作了些研究 ,但目前还不是很清楚 ,文章在对CO2 注气膨胀实验的p—X图、膨胀系数和原始相态参数进行拟合后 ,计算出注气后原油的密度、分子量、泡点处气液相偏差因子和界面张力、原油粘度等的变化规律 ,同时研究了 pV关系和多级脱气的主要特征变化规律。As one of the important measures for evaluating the steam huff and puff test of an individual well,the expansion test has been applied in carbondioxide miscible flood test in oil fields.Although some studies about the changing law of the physical parameters of crude oil after carbon dioxide′s being injected have been made,yet the law is not very clear at present.In this paper,through matching the P-X diagram,expansion coefficients and original phase state parameters in the expansion test of CO 2 injection,the changing laws of the density,molecular weight and viscosity of the crude oil as well as the deviation factor and interfacial tension of the gas liquid phase at the bubble point after carbon dioxide′s being injected are calculated and the PV relation and the changing law of main characteristics in the multistage degassing are studied.

关 键 词：二氧化碳 高压物性 原油 模拟 油层注气 

分 类 号：TE35[石油与天然气工程—油气田开发工程]