1. Stig-Arne Kristoffersen
2010

2. Exploration Drilling Schedule Optimization System
EDSOS
Drilling
Scheduler
Task
Tracker
Pre-Well
Approval
Well
Approval
Post-Well
Approval
Lead and Prospect
Generation
Lead and Prospect
Review
E-WAP Drilling well
Discovery
Suspend
Abandon
Flex based GUI
GIS
Drag and Drop
Customized
Views
Active and Back-
Up wells
Optimization
2 main components required for
effective and efficient, real-time decision making

3. Exploration Drilling Schedule Optimization System
TASK
TRACKER
Pre-Approval Well Approval Post-Approval
Lead and Prospect
Generation
Lead and Prospect
Review
Approval Control
System
Drilling
Discovery
Suspend
Abandon

4. Exploration Drilling Schedule Optimization System
DRILLING
SCHEDULER
Flex based GUI
GIS
infrastructure/topography
Drag and Drop
Customized
Views
RegionOperational
Planning
Team Interpreter
Region Team Interpreter
Exploration
Exploration
Active and Back-up
Wells
(include and/or not)
Optimization
1. Manually
drag and
drop wells
into well slots
2. Optimizer
will run
scenarios
based on
constraints in
metrics
REAL TIME
IMPACT
OF CHANGES
http://www.actenum.com/Actenum_works_with_other_common_software_tools

5. Exploration Well Schedule Optimizer (EWSO)
EXPLORATION OBJECTIVES
• Replace Oil Production
• Increase Gas Reserves
OPTIMIZATION and IMPACT ANALYSIS
• Optimize the Drilling Schedule based on proposed
changes to one or more Metrics.
• Analyze the impact of proposed changes to Well
Slot Allocation and/or Metrics.
• Most metrics are variable and EWSO must have the
capability to run sensitivities to analyze the impact
of various possibilities.
• Some of the Metrics are fixed (e.g. Budgets and Rig
Years) and therefore, EWSO must have the
capability to display the impact of proposed
changes on them.
will facilitate
real-time Impact Analysis and Optimization
to meet Objectives
OPTIMIZATION ENGINE

6.  Oil Volume*
 Onshore
 Region 1
 Region 2
 Region 3
 Offshore
 Region 1
 Region 2
 Region 3
 Stratigraphic split
 Exploration by regions if required
 Unconventional resources
 Exploration by regions if required
note: applies to exploration wildcat and delineation wells
* risked mean
Exploration Well Schedule Optimizer (EWSO)
METRICS
critical factors measured
to evaluate performance
relative to Objectives

7.  Gas Volume*
 Onshore
 Region 1
 Region 2
 Region 3
 Offshore
 Region 1
 Region 2
 Region 3
 Stratigraphic split
 Exploration by regions if required
 Unconventional resources
 Exploration by regions if required
note: applies to exploration wildcat and delineation wells
* risked mean
Exploration Well Schedule Optimizer (EWSO)
METRICS
critical factors measured
to evaluate performance
relative to Objectives

8.  Drilling Costs
 Budget
 Drilling Schedule
 Rig Years
 Well Slot Allocation (may be scheduled or contingent)
 Drilling Logistics
 Rig Move Distances onshore and time/ contracts for offshore
 Drilling Rig Capability
 Gas or Oil
 Onshore or Offshore
 Sour Spec (H2S)
 Depth Rating - horsepower for onshore, rig type for offshore
Exploration Well Schedule Optimizer (EWSO)
METRICS
critical factors measured
to evaluate performance
relative to Objectives

9. BUSINESS RULES
FOR OBJECTIVES AND METRICS
 Well Slot Allocation
 geographic limitations for rigs
 gas versus oil rig and oil versus gas rig change
 maximum limit of mobilization distances and costs
 activity distribution between divisions and oil and gas
 will allow exploration wells to be moved, but not development wells
 will allow exploration wells to be slotted between development wells
 in this case, approval will be required from Production on moves involving changes in
development well schedule
 will not allow wells to be moved into the 4-6 month window prior to spud
 will not allow wells to be moved into 6 month window prior to spud
unless staking and/or site preparation has been initiated/approved
 Portfolio Profile
 risk profile of active wells in Drilling Schedule (POS and objectives)
 adherence to Exploration Strategies (focus areas)
must be built into EWSO to ensure that
proposed changes are technically feasible,
and in compliance with Business and Operating Plans,
as well as Aramco policies and procedures
Exploration Well Schedule Optimizer (EWSO)

10. Stig-Arne Kristoffersen
2010
optimizes drilling schedule
tracks well planning and operations activities
performs real-time impact analysis of proposed changes
enables effective, efficient decision making