超临界多元热流体提高稠油采收率机理研究  

Fundamentals of Enhanced Heavy Oil Recovery by Supercritical Multi-Component Thermal Fluid Flooding

作　　者：黄祖杰 赵秋阳 陈磊[1] 苗岩 王晔春[1] 金辉[1] 郭烈锦[1] HUANG Zu-Jie;ZHAO Qiu-Yang;CHEN Lei;MIAO Yan;WANG Ye-Chun;JIN Hui;GUO Lie-Jin(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2022年第4期974-981,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金基础科学中心项目(No.5188103);国家科技重大专项(No.2016ZX05025-004-001)。

摘　　要：超临界水气化多元热流体热采方法有望成为海上稠油高效开发与利用的变革性技术。本文基于研制的稠油注超临界多元热流体驱替热采岩心实验系统,开展了超临界多元热流体、传统多元热流体、超临界水和高压热水的驱替实验研究,对比分析了不同注入工况下驱油效率、热效率、岩心温度压力分布及演变特性,获得了超临界多元热流体驱替过程中热量传递和压力分布规律。结果表明,超临界多元热流体驱兼具热驱、气驱和混相驱的优势,能显著提高驱油效率、采油速度和热效率,同时能抑制蒸汽超覆和超临界水超覆现象,扩大波及范围。超临界多元热流体驱(25 MPa、400℃)的驱油效率高达95%;相对于超临界水驱(25 MPa、400℃),驱油效率提高3%,采油速度提高47%,热效率提高16%。It is expected to become a transformative technology for the efficient development and utilization of offshore heavy oil for Supercritical water gasification multi-element thermal fluid thermal recovery method. In this paper, first, a supercritical Multi-Component Thermal Fluid(SCMCTF) displacement thermal core experimental system for heavy oil was developed, and then, the displacement experiments of supercritical multi-element thermal fluid(SC-MCTF) flooding, traditional Multi-Component Thermal Fluid flooding, supercritical water(SCW) flooding and highpressure hot water(HW)flooding were carried out, and different injection techniques were compared and studied, and analyzes different injection conditions oil displacement efficiency, thermal efficiency,core temperature and pressure distribution and evolution characteristics. The results show that supercritical Multi-Component Thermal Fluid(SC-MCTF) flooding has the multiple characteristics of thermal flooding, gas flooding and miscible flooding, significantly improve the oil displacement efficiency, oil recovery rate and thermal efficiency, moreover,it can suppress the steam and supercritical water override phenomenon, and expand the scope of the spread. Compared with supercritical water flooding(25 MPa, 400℃), the oil displacement efficiency of supercritical Multi-Component Thermal Fluid(SC-MCTF) flooding(25 MPa, 400℃) is as high as 95%, and the oil displacement efficiency is increased by 3%, the oil recovery rate is increased by 47%, and the thermal efficiency is improved 16%.

关 键 词：稠油 超临界多元热流体 提高采收率 重力超覆 

分 类 号：O359[理学—流体力学]