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Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Typical Model Studies

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.

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Related Experiment Video

Updated: Sep 16, 2025

Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography

Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography

Published on: February 25, 2015

Tracking gas migration using reservoir PVT data as reality check for migration models.

Khaled R Arouri¹, Rainer Schmidt², Youness Elouair²

¹Saudi Aramco, Dhahran, 31311, Saudi Arabia. khaled.arouri@aramco.com.

Scientific Reports

|July 11, 2025

Summary

This summary is machine-generated.

Tracking gas migration geochemically is challenging. New workflows analyzing reservoir fluid properties favored an east-charging model over a north-charging model, revealing migration style impacts gas distribution.

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Last Updated: Sep 16, 2025

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Area of Science:

Geochemistry
Petroleum Geology
Reservoir Engineering

Background:

Geochemical tracking of gas migration is difficult due to limited biomarkers and tracers.
Traditional methods like isotope fingerprinting are insufficient for complex gas migration scenarios.
Developing advanced fluid interpretation workflows is crucial for accurate gas migration modeling.

Purpose of the Study:

To develop and apply novel fluid interpretation workflows for tracking gas migration.
To analyze reservoir PVT fluid properties to constrain gas migration models.
To differentiate between fault and carrier migration and evaluate their impact on gas properties.

Main Methods:

Systematic analysis of reservoir PVT fluid properties from 49 wells.
Application of multivariate statistical analysis.
Testing and comparison of two distinct basin migration models (north-charging vs. east-charging).

Main Results:

Reservoir fluid properties analysis favored an east-charging model with multiple parallel pathways over a long-range north-charging model.
Observed fluid property trends (maturity, density, pressure-to-dewpoint ratios) supported parallel charging along the eastern flank.
Carrier migration influenced gas properties with depth, while fault migration enhanced gas dryness and column height.

Conclusions:

The east-charging model, with multiple parallel migration pathways, better explains the observed gas distribution and fluid properties.
Migration style significantly controls gas properties and distribution, impacting exploration targeting.
The developed workflows provide a robust method for constraining reservoir models and targeting deeper gas accumulations.