Copyright of Shell, Exploration and Production Restricted

The Arrowhead Project – protecting the water

Bruce T. Mitchell

2October 2010

Trap?Buried Hills

HC saturation interval is typically just below the unconformity, and is 100’-150’ thick

Drilling and Development Plans, per site

Arbuckle Formation

Mississippian

Unconformity

Saltwater Disposal well, 2 laterals

Tank Battery, separators

4500’ – 5000’

Cherty Dolomite

Cherty Limestone

Spiculite

Shale

Shale SR

Tripolitic Chert

HC Saturation

Mississippian Uncf

Legend

Pennsylvanian shales and limestones

Pennsylvanian shales and sandstones

Typical Well Design

3

The Process

04/21/23

Copyright of Shell CONFIDENTIALApril 21, 2023 4

Keeping away from the water

Top Hutchinson Salt

Base Salt

Cherokee ShaleMississippi Lime Uncf

950’

1500’

4550’4700’

Oil and Gas

Fresh water

Arbuckle Fm

5450’

Dolomite

Limestone, Chert

Shale

Shale

Limestone, Dolomite

Sandstone

Sandstone

Shale

Salt

Limestone, shale

SandstoneShale

CONFIDENTIAL