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Shale GasGeology

Brian

BrockCornell University, 30 October 2013

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Six-Well Horizontal Drilling Pads

on 640 ac spacing

Statoil Hydro

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Well Productivity

Black Shale Properties

Organic Content

Thermal Maturity

Thickness

Depth

Porosity

Natural fracturing Brittleness

Structural setting

Marcellus Shale, Chittenango NY 3

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Organic

Content

4

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NYSGS 2011

Marcellus Maximum TOC

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Arthur 2011 6

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Thermal

Maturity

Marshak 2008

Kerogen

Plant Matter

Carbon Dioxide & Water

Oil

Window

GasWindow

7

Immature Gas

Mature Gas

Over Mature Gas

NGL

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Devonian

Vitrinite Reflectance

Wrightstone 2009

Immature Gas

Mature GasOver Mature

Gas

Sweet Spot

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Marcellus

Thermal Maturity

0.6

1.53.0

3.03.0

Smith & Leone 2009

ImmatureMature

Mature

Over

Mature

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Horizontal Cylinders of

Fractured Shale

Statoil Hydro

Thickness

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T

Thickness

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T

Thickness

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MCOR after

Wrightstone 2009

Marcellus Thickness

Sweet Spot

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Fractures Pores

BoylesLaw

Black Shale

Depth

Gas Squeeze

Black Shale

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Depth

Gas Push

Schlumberger

Gas Push

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Marcellus Depth

MCOR after

Wrightstone 2009

Sweet Spot

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Well Productivity

Black Shale Properties

Organic Content

Thermal Maturity

Thickness

Depth

Porosity

Natural fracturing Brittleness

Structural setting

Marcellus Shale, Chittenango NY

Enough Carbon, but

Dry Gas, but

Low Volume Fracs

Low pressure

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Marcellus

Geological Constraints

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