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Horizontal Well: What it Means, How it Works

File Photo: Horizontal Well: What it Means, How it Works
File Photo: Horizontal Well: What it Means, How it Works File Photo: Horizontal Well: What it Means, How it Works

What is a horizontal well?

A horizontal well is directional drilling that digs an oil or gas well at least 80 degrees from a vertical wellbore. Recent years have seen this method grow more popular and productive. This tool helps operators recover oil and natural gas from reservoirs with odd shapes or limited access.

How Horizontal Wells Work

Horizontal wells became more critical in fossil fuel extraction in the 2010s. As technology advances, horizontal drilling has reduced prices and increased oil and natural gas extraction efficiency, particularly in the U.S.

Two drilling components have enabled horizontal wells:

  • Mud motors pump drilling fluid into the ground. Mud motor adjustments allow it to direct slightly non-vertically.
  • A measurement while drilling device (MWD) offers real-time subsurface information and a target for horizontal drilling.

Flexible drill bits are also possible with contemporary drilling methods. Engineers may alter the drilling direction to a certain extent by using hydraulic jets.

Due to computer-aided technology, horizontal drilling is more commonplace. A computer utilizing global positioning signals (GPS) may alter the drill bit angle to locate it in the oil or gas field.

Horizontal vs. vertical drilling

Due to its benefits, horizontal drilling has become more lucrative than vertical drilling. It opens up underground reserves that are inaccessible from above. Horizontal drilling lets one pad examine a larger subterranean region.

The horizontal drilling can shut off or alleviate pressure on an out-of-control well by digging a neighboring relief well. Horizontal drilling is also beneficial for installing underground pipes or utility lines under rivers or buildings.

hydraulic fracturing vs. horizontal drilling

Horizontal wells provide significant benefits in hydraulic fracturing. Fracking extracts natural gas and oil from large U.S. shale deposits. Traditional vertical drilling cannot reach these resources due to shale formation impermeability.

Instead, oil and gas corporations drill horizontally into shale and inject mud, a mixture of water, chemicals, and guar gum. Pressure from injections cracks rock, allowing petroleum and natural gas to flow through.

Conclusion

  • These wells are directional drilling methods.
  • This tool helps operators recover oil and natural gas from reservoirs with odd shapes or limited access.
  • It opens up underground reserves that are inaccessible from above.

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