How can we Greatly Improve Hydraulic Fracturing Efficiency

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Northwestern University Technological Institute

Tight Shale Gas-Hydraulic Fracturing

Seminar Series

How can we Greatly Improve

Hydraulic Fracturing Efficiency

Sidney Green

Schlumberger Senior Advisor & Univ. of Utah Research Professor

April 30, 2013

The Big Invention

Complex Formations

10 feet

10 microns

10 inches

“A Picture is worth 10,000 words”, but the correct mental picture of hydraulic fracturing of horizontal wells is priceless

Sidney Green, London Shale Gas Summit, 2010

Vertical Well Fracture Simulation

3-D

Fracture

Simulation

-100

-200

-300

100

0

-400

0 500 1000

Fracture Length (ft)

1500

0.14

0.12

0.1

0.08

0.06

0.04

0.02

Ideal Case Horizontal Well

Fracture Stimulation h

L

The Real Case

Fracture

Complexity

After Closure

Fracture Intersection with Plane of

Weakness

.

Laboratory Large Block Tests

9

10

Homogeneous

Rock Gives

“Penny” Shaped

Fracture

Large Block Test

11

Block with Inclined Discontinuities

12

New Fracture System

25% less water and 40% less proppant used

Saved already 5 million barrels of water and 700 million

pounds of proppant

Saved 30,000 proppant and water hauling road journeys

Average increase in production greater than 20%

Over 320 wells treated; virtually no well screen-outs

Questions

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