Hydraulic Fracturing 101

What is Hydraulic Fracturing?

Hydraulic fracturing, or “fracking”, is the process of drilling and injecting fluid into the ground at a high pressure in order to break or fracture the shale rocks to release natural gas inside.

What is hydraulic fracturing?

This is an old technique for increasing oil production from worked-out oil wells, but a new technique for obtaining methane

(natural gas).

Hydraulic Fracturing Process

• 1. Drill the wello Vertical till the shale is reached and then horizontal lateral

• 2. Case and Cement possible hazard areaso Pressure zoneso Ground Water Areas

• 3. Perforate casing and cementing with Perforating Guno Begins fracture process in rock formation

• 4. Pump fracturing fluid down holeo High pressured fluid extend fractures

• 5. Production

Hydraulic FracturingWater laced with chemicals is pumped down to fracture the shale

and releases the gas, which can be pumped up.

Casing and Cementing

• Casing and cementing a wellbore is used to:o Protect groundwater from contaminationo Keep integrity of well-bore

• Casing is steel pipe that is designed to handle:o over- or under-pressured zones and o high tensile stresses down hole

• Casing is cemented in place to safely deliver hydrocarbons to the surface

Perforating the Formation

• Perforated using a “perf gun”o Perforating guns use explosive charges to

fracture:o Casingo Cementingo Formation

Pennsylvania has considerable coal and considerable gas in shale formations. The coal is relatively “dirty”—high in

contaminants such as sulfur. The gas is far below the surface in the Marcellus and Utica shales.

Marcellus shale