摘要：Foam-assisted steam flooding is a promising technique to alleviate gas channeling and enhance sweep efficiency in heterogeneous heavy-oil reservoirs. However, long-term foam stabilization remains problematic at high temperatures. Three-phase foam (TPF), containing dispersed solid particles, has been proposed to improve foam stability under harsh reservoir conditions. We fabricated a novel TPF system by adding ultrafine fly ash particles, as well as high-temperature resistant microspheres with an adhesive coating layer. This work aims at assessing the ability of the generated TPF in controlling steam channeling and enhancing oil recovery. Static and core flood tests were performed to evaluate foam strength and stability. Our results suggested a stronger foamability at a lower consolidation agent concentration, while a longer half-life period of foam and settling time of solid particles at a larger consolidation agent concentration were observed. Bubbles suspended independently in the liquid phase, with sizes varying from 10 to 100 mu m, smaller than that of the conventional foam, suggesting a significant enhancement of foam dispersity and stability. The plugging rate was close to 90% when the temperature was as high as 300 degrees C, demonstrating a well-accepted plugging effect under high temperatures. A larger pore volume injection of TPF yielded a higher EOR in parallel cores, which substantiated the effectiveness of the three-phase foam system in sealing high-permeability channels.

关键字：three-phase foam; microspheres; adhesive coating layer; fly ash; enhanced oil recovery; profile control

卷、期、页：卷: 11; 期: 8; 页: 3616

发表日期：2021-04-01

影响因子：2.474000

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：APPLIED SCIENCES-BASEL

参与作者：程婷婷,游振江

通讯作者：梁拓

第一作者：杨钰龙,侯吉瑞

论文类型：期刊论文

论文概要：杨钰龙,程婷婷,游振江,梁拓,侯吉瑞，Profile Control Using Fly Ash Three-Phase Foam Assisted by Microspheres with an Adhesive Coating，APPLIED SCIENCES-BASEL，2021，卷: 11; 期: 8; 页: 3616

论文题目：Profile Control Using Fly Ash Three-Phase Foam Assisted by Microspheres with an Adhesive Coating