非常规/复杂油藏

化学添加剂有助于 SAGD 中水包油乳液的形成

本研究旨在了解被称为高温乳化剂的表面活性剂作为添加剂对蒸汽辅助重力泄油过程的影响以及形成水包油乳液的可能性。

(a) 高温测试的实验装置,(b) 用于实验的微模型设计,(c) 油饱和微模型部分的 3D 共焦图像。
图1-(a)高温测试的实验装置,(b)用于实验的微模型设计,(c)油饱和微模型部分的3D共焦图像。

整篇论文中详细介绍的研究旨在了解表面活性剂(作者将其称为高温乳化剂 (HEA))作为蒸汽辅助重力泄油 (SAGD) 过程中的添加剂的效果。这项工作深入了解了表面活性剂在蒸汽沥青生产中形成水包油 (O/W) 乳液中的作用。新型高压/高温 (HP/HT) 视觉单元能够快速评估恢复过程,并更好地了解此类系统中的主动乳化机制。

介绍

作者进行了孔隙网络微观模型实验来分析乳化剂对 SAGD 过程的影响。将含有或不含优先乳化剂的热水注入82℃的沥青饱和微模型中。表面活性剂溶液可以去除侵入区域的残余油,并在未侵入区域扩散时形成O/W乳液。

实验装置

实验装置包括高分辨率成像系统、灯箱、精密注射泵、沥青转移容器和 HP/HT 池(图 1)。

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Unconventional/complex reservoirs

Chemical Additives Assist Oil-in-Water Emulsion Formation in SAGD

This study aims at understanding the effect of a surfactant known as a high-temperature emulsifying agent as an additive to the steam-assisted gravity drainage process and the possibility of forming oil-in-water emulsions.

(a) Experimental setup for high-temperature tests, (b) micromodel design used for the experiments, and (c) 3D confocal images of a section of the micromodel saturated with oil.
Fig. 1—(a) Experimental setup for high-temperature tests, (b) micromodel design used for the experiments, and (c) 3D confocal images of a section of the micromodel saturated with oil.

The study detailed in the complete paper aims at understanding the effect of a surfactant that the authors refer to as a high-temperature emulsifying agent (HEA) as an additive in the steam-assisted gravity drainage (SAGD) process. The work provides insights into the role of surfactants in forming oil-in-water (O/W) emulsions in steam-based bitumen production. A novel high-pressure/high-temperature (HP/HT) visual cell enables the rapid assessment of recovery processes and a better understanding of the active emulsifying mechanism in such a system.

Introduction

The authors conducted a pore-network micromodel experiment to analyze the effect of emulsifiers on the SAGD process. Hot water, with and without a priority emulsifying agent, was injected into a bitumen-saturated micromodel at 82°C. The surfactant solution can remove the residual oil from the invaded zone and forms O/W emulsions as it spreads in uninvaded regions.

Experimental Setup

The experimental setup includes a high-resolution imaging system, a lightbox, a precision syringe pump, a bitumen-transfer vessel, and an HP/HT cell (Fig.

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