可视装置中CO_2与正戊烷或原油接触特征和表征方法  

Visual contact characteristics and characterization of the CO_2 and n-pentane/crude oil interface

作　　者：章星 王珍珍[2] 王帅 李芳 刘红现 Zhang Xing Wang Zhenzhen Wang Shuai Li Fang Liu Hongxian(Faculty of Petroleum, China University of Petroleum-Beijing at Karamay, Karamay, Xinjiang 834000, China Geological Research Institute, No. 1 Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China Geological Research Institute, No. 2 Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China)

机构地区：[1]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000 [2]新疆油田公司采油一厂地质所,新疆克拉玛依834000 [3]新疆油田公司采油二厂地质所,新疆克拉玛依834000

出　　处：《石油实验地质》2017年第3期402-408,共7页Petroleum Geology & Experiment

基　　金：国家重点基础研究发展计划"973"计划项目(2011CB707300);中国石油大学(北京)克拉玛依校区引进人才科研启动基金(RCYJ2016B-01-012)资助

摘　　要：CO_2混相驱油过程复杂,其中包括传质、对流和相变等问题,有些机理尚不明确,需要进行深入研究。采用联合研制的CO_2混相可视驱油实验装置,恒定不同的实验压力,研究CO_2在不同相态下与正戊烷、原油的垂直静态变化特征。CO_2和正戊烷、原油在不同压力下表现为不同的接触形态,正戊烷、原油相对高度-时间曲线为幂函数关系,低压时曲线也可为近似线性变化。提出了"溶解膨胀速率",不同压力条件下CO_2-正戊烷、原油溶解膨胀速率随着时间变化呈减小趋势,变化曲线均为负对数关系;影响正戊烷、原油相对高度和CO_2-正戊烷、原油溶解膨胀速率的因素主要是压力和流体。CO2 miscible flooding is complex, including mass transfer, convection, phase transition and other issues. Some mechanisms are not clear and need in-depth study. The static characteristics of n-pentane or crude oil and CO2 in different phases were studied by using a CO2 miscible flooding visual device under different experimental pressures. CO2 and n-pentane or crude oil show different contact characteristics under different pressures. The relationship between n-pentane or crude oil relative height and time is a power function, and the curve at low pressure can also be approximately linear. The dissolution swelling rate of CO2 vs. n-pentane or crude oil under different pressure conditions shows a decreasing trend with time, and the curves are negative logarithmic. The factors influencing the relative height of n-pentane or crude oil and the dissolution swelling rate of CO2 vs. n-pentane or crude oil are mainly pressure and fluid properties.

关 键 词：溶解膨胀速率 正戊烷 原油 CO2混相驱油 油田开发 

分 类 号：TE341[石油与天然气工程—油气田开发工程]