摘要
为了判断N2驱气窜特征,开展了N2在油、水相中溶解度和模型研究。考虑高温高矿化度,高钙镁离子的油藏情况,拓展了N2在地层水中溶解度计算模型的应用范围;首次提出了惰性气体在原油中具有间隙溶解和气烃加合溶解2种溶解机理,推导出了惰性气体在原油中的溶解度理论方程。以N2在原油中的溶解实验数据为基础,拟合了模型参数。计算结果表明,模型计算值与实验值具有较好的一致性。
N2 solubility in oil and water phases was modeled in order to estimate the characteristics of gas channeling in nitrogen flooding.The application range of N2 solubility model was expanded by considering high temperature,high salinity and high content of calcium and magnesium ions in oil reservoir.It has been put forward for the first time that there are two dissolution mechanisms for inert gas in oil,which are interstitial dissolution and gas-hydrocarbon adduct dissolution,thereby derived a theoretical equation of inert gas solubility in crude oil.Model parameters were matched with the experimental data of N2 solubility in crude oil,indicating good consistency between model-calculated value and experimental value.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第4期77-80,154,共4页
Special Oil & Gas Reservoirs
基金
国家油气科技重大专项"砂岩油藏长期开采后窜流规律及治理方法"(2008ZX05009-004-02)
关键词
N2驱
溶解度
溶解机理
间隙溶解
气烃加合溶解
nitrogen flooding
solubility
dissolution mechanism
interstitial dissolution
gas-hydrocarbon adduct dissolution
