- Report this article
Calin Dragoie
Calin Dragoie
Energy Geologist
Published Feb 11, 2024
+ Follow
Starting with Shell in 2019, a few Permian basin drillers adopted this striking well design. It looks like an unraveled paperclip, and has been called "horseshoe well' or "U-Turn well".
Shell adopted the "horseshoe" well design at well NEELIE 1-85 LOV-4H to address technical issues, as well as lease rights (source).
These wells usually target the Wolfcamp Formation, about 10,000 ft below the surface of West-Central Texas. Typically, lateral section of wells in the Permian basin are 1 mile long, many times constrained by mineral rights, confined to 1 mile wide parcels of land. Technological advances in drilling, directional drilling and geosteering over the past few years make it possible to drill longer wells, with 2 mile lateral becoming common.
Longer laterals lead to increased efficiency, lower surface footprint and ultimately to lower cost per flowing barrel. Many contributing factors lead to increased efficiency: less lease construction, a single build section, a single intermediate casing, more frack stages placed in a row and so on.
With many fractured, postage stamp size mineral rights, drillers are often constrained by 1 mile wide parcels. To take advantage of long reach laterals, operators adopted the trajectory that doubles up on space. Welcome, paperclip well design.
Matador Resources replicated the paperclip trajectory on land immediately adjacent to the original Neelie 1-85 4H location.
One of the wells was sidetracked by Matador after a failed attempt and redrilled for the full 2 mile lateral length. Reported IPs from the two completed U-turn wells was over 2,000 boepd (source). Matador estimates it saved 10 million by drilling and completing the two turned wells instead of four one-mile wells.
PDS drilled several stacked wells, targeting different Wolfcamp benches, all in the confines of a 1 square mile block.
The approach is not limited to the Permian Basin.
Chesapeake drilled a paperclip well in the lower Eagle Ford shale in La Salle County in late 2020, to fit a 10,000 ft horizontal, with 9,200 of completed lateral length (source) into a 1 square mile lease, with sections on either side of an existing one-mile lateral targeting the same formation.
It is clear that U-Turn wells are technically sound to drill and complete, and savings can be achieved from drilling long-reach laterals.
2023 saw several of these wells being drilled and completed. Civitas drilled such a well in Reagan County, Midland Basin.
One question I have is related to tripping in the turn. Will there be keyhole issues when moving pipe and completions strings in the open hole?
More paperclips on Chinook Consulting blog post:
Like
Celebrate
Support
Love
Insightful
Funny
91
18 Comments
Calin Dragoie
Energy Geologist
4mo
- Report this comment
Added information about Chesapeake's Eagle Ford paperclip well. Do you know of any other U-turns?
1Reaction
Jason Harrison
Senior Operator at White Owl Energy
4mo
- Report this comment
Richard Zamora that pretty much looks like the wells you were trying to keep straight! LOL!!
2Reactions 3Reactions
Dwight "Boo" Dautreuil
Owner / Manager @ Louisiana Electrical & A/C Service LLC
4mo
- Report this comment
Shell drilled some like that in the North East. Everyone was saying it’s gonna be too much torque and drag, blah blah blah…. Well they did it successfully…..
1Reaction
Chad Macumber
Data+AI at Databricks
4mo
- Report this comment
What’s the curve radius at the “toe turn”? What’s MD range for the second curve?
1Reaction
Scott B.
4mo
- Report this comment
The T&D must be horrendous- much worse than the chase your tail Geosteering. A fair achievement being able to TD a well geometry like that. However, could you not achieve the same with a side track and tie them back at the landing point up to surface?
1Reaction
See more comments
To view or add a comment, sign in
More articles by this author
No more previous content
- Carbon Capture and Sequestration Projects in Canada Sep 2, 2023
- Rig activity in Canada, trends by the numbers Dec 9, 2022
- Reservoir Navigation With Resistivity Forward Modeling Dec 26, 2020
- Clean Energy, Efficient Use of Resources Jul 2, 2020
- Remote Steering in the Age of the Pandemic Mar 18, 2020
- Transferable Skills: from Petroleum to Geothermal Sep 17, 2019
- Canadian Drilling Stalled in 2019 Jan 27, 2019
- Rig activity in the world Mar 25, 2018
- In Canada, oil price is not the problem. Pipeline capacity is. Feb 9, 2016
No more next content
Insights from the community
- Drilling Engineering What are the best practices for using petrophysical data to improve wellbore stability in shale formations?
- Geology You’re shopping for geological drilling equipment. How can you get the best value for your budget?
- Drilling Engineering How can you identify rock types and mineralogy from well logs?
- Mining Engineering What are the best practices for drilling in a porphyry copper deposit?
- Mining Engineering How do you optimize the sampling and analysis of drill core and rock chips?
- Mineral Exploration How do you apply the CRIRSCO standards to mineral exploration reporting?
- Mining Engineering What must you know to be a successful mining geologist?
- Mineral Exploration How do you design and implement a cost-effective and efficient drilling program for mineral exploration?
Others also viewed
- Horizontal Permian Wells Spud in Last Six Months (Glimpse at Recent Apache Alpine High Well) Aaron Watters 7y
- What's a Few Thousand Feet Between Friends: Calling Depth Severances in Permian Basin Oil and Gas Leases Brett P. 4y
- Is Rock Quality the Key to Declining Well Performance in the Permian? Novi Labs 6mo
- Texas sand versus Northern White sand—emerging issues and trends Kent Syverson 7y
- Permian Basin Leads the Pack Travis Harris 5y
- Drowning in Dirty Water, Permian Needs $22B to Stay Afloat Cameron Kruse 5y
- Another One! ONEOK Adds to Permian NGL Pipeline Push East Daley Analytics 10mo
- A Deeper Dive into North Culberson Reeves Disposal Operations Laura Capper 6mo
Explore topics
- Sales
- Marketing
- Business Administration
- HR Management
- Content Management
- Engineering
- Soft Skills
- See All