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Related Experiment Video

Updated: Jul 26, 2025

Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device

Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device

Published on: March 18, 2020

Novel Anionic-Nonionic Surfactant Based on Water-Solid Interfacial Wettability Control for Residual Oil Development.

Lin Li^1,2, Yue Sun^1,2, Xiao Jin^1,2

¹Shandong Key Laboratory of Oilfield Chemistry, Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China.

|June 19, 2023

Summary

A new surfactant, sodium laurate ethanolamide sulfonate (HLDEA), effectively reverses oil-wet rock surfaces to hydrophilic, significantly boosting residual oil recovery by controlling oil-solid interfaces.

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Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device

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Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography

Published on: October 21, 2018

Area of Science:

Petroleum Engineering
Surface Chemistry
Materials Science

Background:

Crude oil contact forms irreversible asphaltene layers on rocks, creating residual oil films that hinder oil recovery due to strong oil-solid adhesion.
Improving oil recovery is crucial, but residual oil films present a significant challenge in conventional methods.

Purpose of the Study:

To synthesize and evaluate a novel anionic-nonionic surfactant, sodium laurate ethanolamide sulfonate (HLDEA), for enhanced oil recovery.
To investigate HLDEA's ability to control wettability and reduce oil-solid adhesion for efficient residual oil displacement.

Main Methods:

Synthesis of HLDEA by introducing sulfonic acid groups into laurate diethanolamide (LDEA) via Williamson etherification.
Evaluation of HLDEA's effect on rock wettability using contact angle measurements.
Assessment of HLDEA's performance in enhanced oil recovery under high salinity conditions.
Nanomechanical experiments to analyze HLDEA adsorption and its effect on oil-solid adhesion.

Main Results:

HLDEA successfully transformed rock wettability from oleophilic (54.7° contact angle) to strongly hydrophilic (155.9° underwater contact angle).
HLDEA demonstrated excellent salt tolerance and improved oil recovery by 19.24% at high salinity (2.6 × 10⁴ mg/L).
Nanomechanical tests confirmed HLDEA adsorption on core surfaces, regulating microwetting and reducing adhesion forces for effective oil stripping.

Conclusions:

The synthesized HLDEA surfactant effectively controls oil-solid interface wettability, making it a promising agent for enhanced residual oil recovery.
HLDEA's high salt tolerance and ability to alter rock wettability offer practical significance for efficient oilfield development.