注二氧化碳混相驱试井模型及压力分析  

Miscible Flooding Well Test Model With Carbon Dioxide Injection and Its Pressure Analysis

作　　者：朱建伟[1] 邵长金[1] 廖新维[1] 杨振清[1] 

机构地区：[1]中国石油大学(北京),北京102200

出　　处：《油气井测试》2011年第4期1-4,75,共4页Well Testing

基　　金：国家科技重大专项(2008ZX05054)部分成果;中国石油大学(北京)青年教师专项基金资助

摘　　要：基于注二氧化碳混相驱试井分析理论,分析了二氧化碳与原油混相过程中混合物组分的扩散模型和温度、粘度的变化规律,研究了此过程中组分突变与温度突变(粘度突变)对压力的影响,将压力变化分成了求解两区复合试井模型得到的压降和由温度与粘度突变引起的附加压降。通过推导,给出了井底的整体压力响应;利用数值反演方法,计算了考虑组分与粘度变化时,不同流度比下的压力和压力导数。结果表明,组分与粘度变化对压力曲线的影响是明显和复杂的。Based on miscible flooding well test analysis theory with carbon dioxide injection,the diffusion model of mixture components when carbon dioxide miscible with the oil and variation law of the temperature and viscosity are analyzed,and the influence of sudden changes the components and temperature(viscosity mutation) on pressure are studied,and the pressure changes into the pressure drop obtained by solving the compound well test model of two areas and the additional pressure drop caused by sudden drop of temperature and viscosity.By derivation,the overall pressure response at the bottom is given,and using numerical inversion method,the pressure and pressure derivative under different mobility ratio are calculated considering changes of the composition and viscosity.The results show that the influence of changes of composition and viscosity on the pressure curve is obvious and complex.

关 键 词：二氧化碳驱油 试井模型 混相驱 组分突变 粘度突变 压力曲线 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]