Magnetic Surveys in Carbon Capture and Storage: A Simplistic Look at an Important Technology

Have you ever wondered how geologists and engineers find the best places underground to store carbon dioxide and help reduce emissions from industrial sources of pollution? One interesting tool they use is called a magnetic survey. While it might sound technical, the basics are easy to understand—and these surveys play a big part in making carbon capture and storage (CCS) safe and possible. The process happens both inside the office and out in the field to truly understand what is going on beneath our feet.

First, What Is Carbon Capture and Storage?

Carbon capture and storage is a method used to reduce carbon dioxide (CO₂), in the atmosphere. The idea is to capture CO₂ directly from sources like manufacturers, cement and chemical plants and biofuels producers – like we have here in Louisiana - and then safely storing it long term, deep underground.

How Do Magnetic Surveys Help?

Before storing CO₂ underground, experts need to make sure the storage site is safe, secure, and stable. This is where magnetic surveys come in. These surveys use helicopters and specialized equipment, called a magnetometer, to measure tiny changes in the Earth's magnetic field. Those changes can reveal locations of old wells and pipelines.

What Can You Expect from a Magnetic Survey?

If a magnetic survey is taking place near you, here’s what you might notice:

• Equipment: Low-flying helicopters.

• Data Collection: The helicopter will fly around in patterns, collecting readings from different locations to build a map of old wells and pipelines in the area.

• Timeline: Depending on the weather, the helicopter will be out surveying for one month.

This information helps experts by identifying anomalies that might not show on the surface.

Why Does It Matter?

By using science to carefully map out where the presence of hazards like old, existing wells and pipelines might be, we can make sure that we plan the most effective way to store and monitor CO₂ in the safest and most successful way possible by knowing exactly what exists on and below the surface before we ever start working.