Trouble Free High Angle Wells
Transcript of Trouble Free High Angle Wells
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www.MerlinERD.com
An introduction to drilling
and petrophysics
SPE LONDON2017
Iain Hutchison CEng FIMechE
Director, Merlin ERD Ltd
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Intro to Drilling and Petrophysics
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Content
• Well Types
• Costs & Value
• Rig Types
• Phases of a Well
• Formation Evaluation
It’s ALL about Drilling!
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Well Types
• Exploration
− Is there anything there (success 1:5)
• Appraisal
− How much is there?
• Development
− Production : makes the money
− Injection : keeps it coming
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Vertical & Directional Wells
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Directional Drilling
Inaccessible Locations
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Well Time & Costs
• Drilling times
• 5 to 500 days
• Typical 30 – 50 days
• Drilling costs
• US$100k – US$1Mn per day
• ≈80% of costs are time dependent
• Well : US$2Mn to US$100’s Mn
• Typical onshore US$5Mn / offshore US$30Mn
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Value of Drilling Quickly!
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“ Brief History in Time”
• First recorded drilling in Sichuan Province, China –
c. 2,000 years ago, salt drilling
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“ Brief History in Time”
• 1264 – mining of seep oil witnessed by Marco Polo
in Baku, Azerbaijan
• 1594 – Oil wells are hand dug to 115ft (35m) in
Baku, Azerbaijan
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“ Brief History in Time”
• 1859 – first oil well drilled in the United States (21m)
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Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
Gas
oil
water
MUD TANK
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Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
Gas
oil
water
MUD TANK
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liquid cement Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
Gas
oil
water
MUD TANK
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Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
7. Displace cement “behind” casing
Gas
oil
water
MUD TANK
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Copyright © 2017 Merlin ERD Ltd
Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
7. Displace cement “behind” casing
8. Drill ahead to 2nd casing seat
Gas
oil
water
MUD TANK
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Copyright © 2017 Merlin ERD Ltd
Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
7. Displace cement “behind” casing
8. Drill ahead to 2nd casing seat
9. Run 2nd casing string
10. Pump and displace cement
“behind” casing and install
Blow Out Preventer (BOP)
Gas
oil
water
MUD TANK
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Copyright © 2017 Merlin ERD Ltd
Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
7. Displace cement “behind” casing
8. Drill ahead to 2nd casing seat
9. Run 2nd casing string
10. Pump and displace cement
“behind” casing and install
Blow Out Preventer (BOP)
11. Drill through the reservoir to
TOTAL DEPTH (TD)
Gas
oil
water
MUD TANK
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Copyright © 2017 Merlin ERD Ltd
Phases of a well
1. Spud in
2. Drill ahead
3. Drill to first casing seat
4. Pull out of hole (trip)
5. Run first casing
6. Pump cement
7. Displace cement “behind” casing
8. Drill ahead to 2nd casing seat
9. Run 2nd casing string
10. Pump and displace cement
“behind” casing and install
Blow Out Preventer (BOP)
11. Drill to TOTAL DEPTH (TD)
12. POOH, and run electric logs
13. Run Production “liner”
14. Test the well
15. Complete the well
16. Plug and abandon (P&A) the wellGas
oil
water
MUD TANK
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Drilling Envelope
Encana Germain 15A-36
Apache STAG 12H
Maersk Qatar Persian Gulf BD-04A
Chayvo O-5
Statoil Norway North Sea B-47
ExxonMobil Canada Newfoundland and Labrador B-16 56 OPA2
Shell USA Gulf of Mexico - Mississippi Canyon A10 S1
Shell USA Gulf of Mexico - Mississippi Canyon A10
Shell USA Gulf of Mexico - Garden Banks GB 472 #2 ST3
Shell USA Gulf of Mexico - Mississippi Canyon MC 766 #1
Shell USA Gulf of Mexico - Garden Banks GB 426 A-16 ST3
BP USA Gulf of Mexico - Mississippi Canyon MC725 # 1
Devon Energy USA Gulf of Mexico - Walker Ridge WR 278
Chevron USA Gulf of Mexico - Green Canyon GC 512 #1 BP2
BP USA Gulf of Mexico - Keathley Canyon Tiber KC-102
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000
TVD
(M
etre
s)
Departure (Metres)
Envelope All Well Data test 01 Exxon
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Drilling Today
• Thousands of wells per year
• Well costs $2 million to $100’s million / well
• Deepest Vertical Well:
• GNPP Nedra Russia Kola Peninsula SG-3
• 40,230 ft (12,262m)
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ERD Design
Viable? How to tell / prove it?
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Deepest Well - Departure
• Longest Step-Out – Chayvo O-5 - 41,338ft (12,600m)
The Geological Society
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Drilling Rigs - Land
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Drilling Rigs - Offshore
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Drilling Rigs - Offshore
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Drill String - Bits
Wears
Gouges Scrapes
Crushes
• $400 - $100,000+
• Durability matched
with ROP
• Best bit = cheapest bit in
terms of overall cost =
cost/foot
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How Do We Know What We’re
Drilling Through?
• Core – direct samples of the formation
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Wireline Logging
• Post drilling operation
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Logging While Drilling
• Whilst Drilling Measurements
• Can accurately position
well whilst drilling -
Geosteering
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Need to knows
• Porosity
− Voids which hold fluids/gas
• Saturation
− Volume of each fluid present in voids
• Permeability
− How easy the fluid will move through the formation
• Fluid Properties
− What is it?
− How will it flow?
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“Basic” Logging Measurements
• Resistivity Logs
− Salty Water vs Hydrocarbon filled pores
• Porosity Logs
− % of pore volume in the rock - porosity
• Density Logs
− Bulk density of the formation, guide to porosity
• Sonic Logs
− % of pore volume in the rock – porosity
• Gamma Ray
− Natural Gamma Radiation – Sand/Limestone or
Shale
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Log Example
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Questions?
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Merlin ERD Ltd
• Feasibility studies, Peer reviews, Problem investigation• ERD Operational preparedness & Training• Hole Condition Monitoring - Rig• Drilling Manuals
Merlin ERD LimitedPerth, UK
Tel +44 1738 627922Email: [email protected]
www.MerlinERD.com
If we always do what we’ve always done, we’ll only get what we’ve always had!