3:41 THE CHALLENGE
Survey error alone can't place an unconventional well.
SAGD and CSG production depend on precise well-to-well geometry, but accumulated MWD survey error produces lateral shifts of metres in the horizontal, enough to miss an intercept or lose hydraulic communication.
On multi-pad developments, that same uncertainty risks frac hits and collisions with the wells already in the ground.
THE GUNNAR APPROACH
Range to true relative position, then twin, space or intercept.
Gunnar resolves the true relative position between wells with magnetic ranging, active rotating-magnet (Torped™) or passive (EverReady™), building a composite survey that corrects real lateral shifts in real time.
From there we steer precise well twinning and spacing for SAGD, toe-to-toe intercepts for coal-seam-gas pairs, and anti-collision scans that keep new wells safely clear of existing ones.
SCOPE OF WORK, ONE INTEGRATED TEAM
Placement, spacing and intercept, proven on live pads.
01
SAGD well twinning
Place injector/producer pairs at precise, consistent spacing along the horizontal.
02
CSG vertical intercept
Toe-to-toe and vertical intercepts that open hydraulic communication for enhanced gas production.
03
Collision avoidance
Anti-collision scans that prevent frac hits and well collisions across multi-pad developments.
04
Composite-survey correction
Detect and correct real lateral survey shifts of several metres in real time.
05
Gyro-referenced ranging
Interference-independent placement even beside running conveyors, casing and surface clutter.
06
Enhanced-production intercept
Intercept target wellbores to multiply recovery from existing assets.
TECHNOLOGY DEPLOYED
Proprietary tools for this application.
Torped™
Rotating-magnet ranging (~300 ft), the workhorse for SAGD twinning, precise spacing and CSG intercept.
EverReady™
Passive ranging from existing MWD/GWD data, collision avoidance and SAGD with no extra rig time.
TopGun™
Resolves true relative position and runs anti-collision scans from the composite survey.
PROOF, 3 PROJECTS
Where we've done it.
Queensland, Australia · 2025 – ongoing
Horizontal CSG Toe-to-Toe Intercepts
4 interceptsacross 2 well pairs, 100% success
Alberta, Canada · 2025
SAGD Multi-Pad Pass-By / Collision Avoidance
5 pass-byscompleted safely on a live SAGD pad
Alberta, Canada · 2025
Greenfield SAGD Pass-By Ranging
±0.38 mTVD (2σ), true position resolved at pass-by
WATCH, FROM THE FIELD
See it in motion.
3:41 
3:24 Gunnar's First Canadian Deployment | SAGD Magnetic Ranging Case Study
FREQUENTLY ASKED
Unconventional Production, your questions, answered.
What's the difference between well twinning and an intercept?
Twinning places a new well at precise, controlled spacing alongside an existing one, for example SAGD injector/producer pairs. An intercept physically connects to a target wellbore, such as a coal-seam-gas toe-to-toe connection. Both rely on magnetic ranging for true relative position.
How do you prevent frac hits and collisions on multi-pad developments?
Passive ranging (EverReady™) reads existing MWD/GWD data to resolve true relative position and run an anti-collision scan, no extra rig time and no new downhole tools, so new wells stay safely clear of the ones already drilled.
Can you correct survey error in the horizontal?
Yes. Accumulated MWD error can shift a horizontal well by several metres. Our composite-survey workflow detects and corrects those shifts in real time, so each pass-by or intercept lands on target.
Does this work near heavy magnetic interference?
Yes. Gyro-referenced ranging gives an interference-independent azimuth, proven even alongside a running mine conveyor and dense surface clutter, so steering and placement hold through the final approach.