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To: thackney

Pioneer’s two completed wells in the Wolfcamp have already exceeded expectations, each producing 800 to 1,000 barrels of oil a day, and they’re still early in production.

Question....based on the above do they think it could increase or decrease and what would cause either to happen?

Do horizontal wells that are fractured have the same pressure issues that vertical wells do? Does the fracturing process create it’s own pressure?

Sorry for all the questions I’m really interested.


9 posted on 03/15/2012 1:18:25 PM PDT by Recon Dad (Gas & Petroleum Junkie)
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To: Recon Dad
based on the above do they think it could increase or decrease and what would cause either to happen?

What to increase or decrease, the individual well output? No way for me to tell that, they are the ones reading the data.

Do horizontal wells that are fractured have the same pressure issues that vertical wells do?

Fields have the pressure source. Each field or formation will have its own pressure. A well that stops vertically or is horizontal is going to see the same pressure.

Does the fracturing process create it’s own pressure?

No, the fracturing process temporarily "overcomes" the field pressure. At that time it puts more pressure back into the rock until it starts small local cracks form. The fluid flow into those cracks, spreading out through other cracks. Within the fluid is sand.

As the hydraulic fracturing pressure is equalized then reduced, the cracks stop spreading and the fluid starts to flow back. The cracks begin to close as the fluid flows backs. The sand gets trapped in the closing crack leaving them open.

Halliburton puts together a nice description with a simple video to explain the process.

http://www.halliburton.com/public/projects/pubsdata/hydraulic_fracturing/fracturing_101.html

12 posted on 03/15/2012 1:56:46 PM PDT by thackney (life is fragile, handle with prayer)
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