Industry CTD Case Studies
Location
Operator
Well Type
& Deviation
Application & Comments
Hole Size
Used to minimise formation damage.
Safer operations. Three laterals.
4-3/4"
Re-entry,
Vertical
Canada
USA - Alaska
ARCO
Re-entry,
Horizontal
3-3/4"
Horizontal
BP
USA - Alaska
30 wells in 91 days. Increased well productivity and reserves +40%.
6-1/4"
Re-entry,
Vertical
Pan American Energy
Argentina
unknown
Rosewood
USA - Kansas
USA - California
ARCO
Re-entry,
Horizontal
3-3/4" & 4.75
USA - Pennsylvania
US Dept Energy
Chuck Henry
USA - Ohio
3-3/4"
USA - Texas
Oryx
CNG Transmission
USA - Pennsylvania
Link
THE AMERICAS
Venezuela
Lagoven
Conoco Phillips
USA - Texas
Venezuela
Lagoven
Location
Operator
Well Type
& Deviation
Application & Comments
Hole Size
Link
MENA
First 3 trial wells led to continued usage. Hybrid rig, multi field use.
3-3/4" - 4-1/8"
Re-entry,
Deviated
Oman
UAE - Dubai
DME
Re-entry,
Horizontal
3-3/4"
High temp and high H2S. One well had 8 laterals / 12,476ft drilled.
Drilled with native crude and N2. Both technical and economic benefits gained.
3-3/4"
Re-entry,
Horizontal
Sonatrach
Algeria
PDO
Location
Operator
Link
EUROPE
Holland
Italy
ENI
Lundin
France
Shell / Nam
Norway
UK - North Sea
Shell
BP Norge
Well Type
& Deviation
Re-entry,
Horizontal
Re-entry,
Horizontal
Re-entry,
Vert & Deviated
Re-entry,
Horizontal
Re-entry,
Horizontal
3-3/4" - 3-7/8"
3-7/8"
unknown
4-1/8"
6"
Hole Size
Application & Comments
Open hole sidetrack performed on depleted carbonate reservoir. Drilled underbalanced.
Successful CTD trial in 1993. Sodium formate fluid.
2" CT was used as completion string allowing dual completion and 2 zone production.
Offshore platform, sidetracks completed. Field life extension, improved productivity.
Offshore platform. Laterals drilled underbalanced. Highly depleted reservoir
4-3/4"
6-1/4"
S+ Horizontal
Re-entry,
Horizontal
Re-entry,
Horizontal
Re-entry,
Horizontal
Re-entry,
Horizontal
Grassroots,
Vertical
Pilot holes,
Vertical
Top hole,
Vertical
3-7/8"
12-1/4" & 14-3/4"
3-7/8"
4-3/4"
6-1/4" - 8-1/2"
3-3/4"
Minimise formation damage. Safer operations. Three laterals.
A re-entry operation for cost reduction. Deeper KOP's and gas lift valves.
Large diameter CTD capability - gyro and whipstock enabled sidetracking.
Gas storage. 9ft thick sands. Improved skin factor. 8,000% increase in deliverability.
Very high radius overbalanced wells. Wells showed up to +840% in gas deliverability.
3 wells. Austin Chalk. Casing exit, drilled the horizontal underbalanced.
Untapped reserves with tightly constrained target.
Used CT to drill underbalanced as the wells had old casing and could be damaged easily.
4 wells drilled from a platform. Discordance, risk reduction, intermediate casing.
Offshore platform. Safe solution to shallow gas risks. 300 wells so far.
Reduced well times from 3 days to 1 day per well. 33% cost reduction per well.​
CTD Services > Resources Centre > Industry CTD Case Studies
+44 1392 933 100 | +1 800-868-1562