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Typical Model Studies

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Capillarity in Fluid

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Bernoulli's Equation for Flow Along a Streamline

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Couette Flow

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Related Experiment Video

Updated: Nov 21, 2025

Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes

Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes

Published on: January 27, 2017

New Method for Quantitative Prediction of Liquid Flowback Based on the Capillary Bundle Model.

Yuan Yuan¹, Yingfeng Meng¹, Xiaoming Su²

¹State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan Province 610500, China.

|January 18, 2021

Summary

A new method accurately predicts liquid flowback in low-permeability sandstone reservoirs by considering pore structure and boundary effects. This research enhances understanding of formation damage and improves fluid recovery predictions.

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Last Updated: Nov 21, 2025

Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes

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Published on: January 27, 2017

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Area of Science:

Petroleum Engineering
Reservoir Engineering
Geology

Background:

Liquid invasion causes formation damage in low-permeability sandstone reservoirs.
Prolonged working fluid retention leads to significant water blocking damage.

Purpose of the Study:

To develop a quantitative prediction method for liquid flowback in low-permeability sandstone.
To investigate the influence of pore structure and boundary layer effects on liquid flowback.

Main Methods:

Proposed a capillary bundle model incorporating the boundary layer effect.
Applied the method to low-permeability sandstone samples from the Penglaizhen formation.
Validated predictions using gas displacement and nuclear magnetic resonance experiments.

Main Results:

Quantitative predictions showed good agreement with experimental results.
Liquid flowback is influenced by pore structure, boundary layer effect, and displacement pressure.
Different permeability samples exhibited distinct liquid saturation behaviors and flowback durations.

Conclusions:

The new method accurately predicts cumulative liquid flowback and liquid saturation.
Provides insights into the microscopic mechanisms of liquid flowback in sandstone reservoirs.
Enhances the understanding and management of formation damage in oil and gas exploration.