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Open Access Article

Petroleum and Natural Gas Engineering. 2024; 1: (1) ; 8-13 ; DOI: 10.12208/j.pnge.20240002.

CO2 three-phase displacement characteristics in porous media based on the micro-CT testing technique
基于微CT测试技术的多孔介质内CO2三相驱替特性研究

作者: 臧航宇 *, 王栋, 宋国阳, 李莺歌, 杜东兴

青岛科技大学机电工程学院地质能源研究院 山东青岛

*通讯作者: 臧航宇,单位:青岛科技大学机电工程学院地质能源研究院 山东青岛;

发布时间: 2024-11-18 总浏览量: 135

摘要

准确获得多孔介质内的三相流体分布是具有挑战性的课题。本文将岩心称重测试与微CT测试结果结合,对油水饱和孔隙介质中的CO2三相驱替特性开展了实验研究。通过对干岩心、饱水岩心、油驱水后岩心、以及CO2驱替后的岩心进行测试,得到了CO2驱替完成后多孔介质内的油/气/水三相饱和度数据。结果发现CO2驱替后岩心含水率由0.332降至0.125,而含油率由0.668仅降至0.648,表明CO2驱替对岩心内水相的驱替效果要好于对油相驱替效果。

关键词: 微CT测试;多孔介质;CO2驱替;三相流体分布

Abstract

Obtaining accurately the distribution of three-phase fluids in porous media is a challenging research task. This study investigates the three-phase displacement characteristics in oil-water saturated porous media using CO2 as a displacing fluid by combining core weight and Micro-CT measurement. Measurements were conducted on dry, water-saturated, oil-water saturated, and CO2-displaced cores to determine the oil/water/gas distribution in the porous media after CO2 displacement process. The results showed that the water content of the core decreased from 0.332 to 0.125 after CO2 displacement, while the oil content only decreased from 0.668 to 0.648, indicating that CO2 displacement has a better displacement effect on the water phase rather than on the oil phase.

Key words: Micro-CT measurement; Porous media; CO2 displacement; Distribution of three phase fluids

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引用本文

臧航宇, 王栋, 宋国阳, 李莺歌, 杜东兴, 基于微CT测试技术的多孔介质内CO2三相驱替特性研究[J]. 石油与天然气工程, 2024; 1: (1) : 8-13.