Gilsonite in Oil Well Cementing

Gilsonite in Oil Well Cementing

A wellbore is a drilled hole that assists exploitation of natural resources including oil, gas or water. Wellbore is the primary hole on which the final well will be made. Also, wellbores can be encased by steel or cement or in some cases, depending on the situation, may not be encased.

In oil wells it is necessary to encase the wellbore by cement. Adding the Gilsonite material during oil well cementing enhances the isolation characteristics, while decreasing the vertiginous Gas flows. These characteristics can result into more effective mud removal which also enhances the environmental factors. Drilling environmental regulations are getting more and more stricter around the world.

The nature of Gilsonite allows this material to act as a binder. Gilsonite also plays the role to fill the cracks made in the wellbore casing, causing better bonding and avoiding isolation in different zones.

The Gilsonite which needs to be applied in oil well cementing is standard quality lump grade Gilsonite. Basically, when an oil well is finished off, a mixture of cement and rock aggregate is pumped down the well to encase the oil pipe into the formation. Pumping such a heavy mix down into a well and pulling it back up again is a very expensive process. Replacing a great extent of the heavy rock with light-weight Gilsonite particles reduces the pumping costs dramatically. Therefore applying Gilsonite in Oil Well Cementing is simply a “rock replacement.”

 

References:
www.investopedia.com
www.americangilsonite.com
www.zistagilsonite.com

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