Greg Jackson Sr. Consultant Unconventional Resources gregory.jackson@weatherford

1. Leveraging Unique Formation Evaluation To Alter The Perception Of Shale Exploration and Production In Europe Greg Jackson Sr. Consultant Unconventional Resources gregory.jackson@weatherford.com

2. Morning Math Problem! • 70% decline by the end of the 1st year; 20% every year after • Year 1 = 100 wells; Year 2 = 100 new wells (200 total), … • All wells come online at X m3/day Istantaneous Rate at end of 4 years: 50% of production from day 1 of year 4 Istantaneous Rate: 4x’s the wells in year 4 = 73% increase in production rate from year 1

3. Wellsite Geoscience • Direct rock-based data from cuttings • Direct measurement of mud gas • Highly cost-effective • Near-real time results

4. “Bringing the Lab to the wellsite”

5. Acquire & Interpret Data While Drilling • Organic • Organic Richness, Fluid Type • Adv. gas detection • SRA Elemental chemostratigraphy Profile of organic richness and maturity parameters Mineralogy and customized brittleness estimation • Inorganic • Stratigraphy, • Mineralogy, Rock Properties • XRF • XRD Characterize target zones and lower geological risk Improve in zone performance Immediate input for completion design at TD

6. XRF Elemental Data Stratigraphy Depositional Facies Diagenetic Facies Reservoir Quality Mineralogy Lithology Mechanical Properties

7. Pilot Program

8. Eagle Ford Shale Ni Estimated TOC (Wt %)

9. Chemostratigraphic Zonation Elemental Chemostratigraphy Haynesville Formation (Late Jurassic) Texas & Louisiana From Dix et al. (2010)

10. Brittleness – No Universal Formula Possible Jarvie et al. (2007) • Jarvie et al. (2007) for Barnett Shale – good first approximation • In reality, formula must be customized to each shale formation

11. Eagle Ford Shale is Calcite-Dominated Sample 1 60% Calcite by XRD Sample 2 42% Calcite by XRD

12. Pilot Hole XRF& Advanced Gas Data Eagle Ford Shale – Vertical Well XRF Chemostratigraphy / Mineralogy / Brittleness Advanced Gas Data Proxy for TOC Heavy Oil Dry Gas Light Oil Condensate Total HC • Good agreement between element-derived TOC and gas-derived total hydrocarbons

13. Why is wellsite evaluation critical • Shale Gas Production is Not Uniform Well B Well A Production Log Examples 30% to 40% of the Perforation Clusters are contributing less than 1% of total production Production Percentage Production Percentage Perforation Clusters Perforation Clusters From Schlumberger (2011) Courtesy Schlumberger • Analysis results of 150+ production logs run in the Woodford, Barnett, Fayetteville, Haynesville, Eagle Ford, and Marcellus: • Confirmed that production is not uniform in horizontal shale gas reservoirs (US L48) • Estimated that at least one-third of the perforation clusters contribute only minimally • Results vary by formation and region (geological age, setting, and basin)

14. Shale Wells Require Expensive Completions South Texas well AFE Costs 75% of completion costs and 53% of overall costs are for Fracturing

15. Lateral: Variable Brittleness In Same Zone Eagle Ford Shale – Lateral Well • Wellbore maintained at +/- 10 feet above target in dipping beds

16. Eagle Ford Shale Total Clay Green <15% Yellow 15 – 20% Red >20% TOC 400ft – no HF

17. Summary • XRF cuttings analysis is a direct measurement of the elemental inorganic geochemistry performed on a physical sample of the reservoir • XRF robust range of elements with traceable accuracy and precision Provides apples to applesdata for both vertical and lateral

18. Summary • Save money on core collection for large pilot programs • Save money on inefficient fracture stages • Increase oil/gas output per stage and lateral A Global Service Provider