Detecting overlap between carbon storage leases and oil and gas leases

Carbon capture and storage projects are multiplying quickly, and each new injection well needs a clear title to the subsurface pore space where the CO2 will be locked away. The trouble is that pore space rights in many producing basins already sit underneath oil and gas leases granted decades ago, sometimes before anyone imagined a permanent storage industry. That stacking of rights is now triggering overlapping claims, lease amendments, and occasional courtroom fights across the United States.

Australian operators and investors are watching these fights closely because many of them hold interests in American assets while also managing projects closer to home. The Gorgon project off the coast of Western Australia injects carbon into the Dupuy Formation beneath Barrow Island while coexisting with long-standing petroleum production rights, and the Otway Basin in Victoria has hosted test injections alongside existing exploration permits. The same mapping techniques used to untangle US overlaps can therefore be repurposed by anyone juggling carbon and petroleum interests across multiple jurisdictions.

How carbon storage rights and petroleum rights stack against each other

When a company secures an oil and gas lease, it typically gains the right to explore and produce hydrocarbons from a defined vertical column beneath the surface. Carbon sequestration needs something subtly different: long-term access to the pore space within a specific rock formation, often deeper than the producing zone, along with rights to monitor and remediate the site indefinitely. Because both interests target the same column of rock, conflicts emerge almost by default.

In the United States, most legacy leases were drafted with no reference whatsoever to CO2 storage or pore space as a separate commodity. That silence has opened a door to competing interpretations, with some operators asserting that incidental rights cover storage while landowners argue the opposite. Australia has tackled the same ambiguity more directly through instruments like the Offshore Petroleum and Greenhouse Gas Storage Act, which explicitly carves storage rights away from petroleum rights. Even so, operators in the Gippsland Basin have learned that statutory clarity on paper does not eliminate negotiation work at the parcel level.

Reading the fine print of an oil and gas lease

Before anyone assumes a clean stacking arrangement, the underlying lease document deserves a careful read. Look first for any clause that mentions subsurface storage, injection of fluids other than water, or the right to use the formation for purposes other than hydrocarbon production. If such language appears, the lessee may already control carbon storage without a separate agreement. If it does not appear, the door is open for a separate sequestration lease from the surface or mineral owner.

Depth language matters just as much. A lease granting rights to test and produce formations down to, say, 8,000 feet may leave everything below that depth exposed to a new carbon storage agreement. Conversely, a lease covering a formation to an indefinite depth often captures pore space that a developer now wants for CO2. Queensland's Surat Basin offers a useful parallel: coal seam gas operators there have had to secure separate storage tenements because original CSG rights covered only the gas-bearing seams, not the saline formations below.

Layering maps to reveal competing interests

Once the paperwork hints at a possible stacking problem, the next move is to overlay the relevant data layers in a mapping platform. Shale Navigator lets users place carbon sequestration lease boundaries directly on top of drilling permit layers, lease offer polygons, and pipeline routes, so a parcel showing three or four different coloured boundaries immediately flags itself for review. This kind of visual triage saves hours of manual title work and surfaces overlaps that would otherwise stay hidden in clerks' offices.

Pipeline data should be checked alongside lease boundaries because a prospective storage site without sufficient transport infrastructure is rarely viable. Reviewing the pipeline capacity notes alongside permit layers helps separate parcels with practical CO2 delivery options from those stranded by missing capacity. A map that was clean in January can look crowded by April once the next round of permit filings lands.

Topography, elevation contours, and surface decisions

Carbon storage projects also depend on a workable surface footprint, which makes elevation and access considerations surprisingly important. Injection wells, compression stations, and monitoring pads all need a buildable site, even when the actual storage happens kilometres below. Mapping the surface terrain therefore complements the subsurface review and can disqualify otherwise attractive parcels.

The pad site identification guide explains how slope and accessibility shape site selection in ways that often surprise first-time CCS developers. In Australia, the Cooper Basin's broad salt flats and the rolling pastoral country of central Queensland show the same principle from another angle: a parcel that looks correct on a lease map may be physically unusable once contours are checked against proposed access routes.

Confirming findings before acting

Map overlays speed up the discovery phase, but every flagged overlap still needs ground-truth verification before money changes hands. County recorder offices, state oil and gas commissions, and Bureau of Land Management filings each hold a piece of the puzzle, and the records sometimes contradict each other. A title opinion from a lawyer experienced in both lease types is worth every dollar when the overlap spans a multi-unit horizontal well plus an adjacent sequestration agreement.

For Australian readers sourcing US data, the same caution applies through a slightly different lens. Titles in Victoria or South Australia sit behind state-based tenement registers rather than county recorders, but the parallel workflow holds. Running the parcel through Shale Navigator's ownership layers, comparing against pipeline data, then confirming through a local title search tends to catch most surprises before they cost real money.

Because lease status shifts month to month, a parcel review is rarely one and done. Setting up automated permit alerts keeps new permit filings tied to the same parcel arriving in an inbox without manual re-checking, which makes follow-up reviews quicker and easier to defend.

Red flags that suggest a carbon storage conflict

• The original lease predates 2010 and contains no mention of pore space, injection, or storage.
• Depth clauses are vague or extend to formations beyond the producing zone.
• Surface rights have been sold separately from the mineral estate at some point in the chain.
• Active drilling permits share the same parcel with a recorded sequestration lease.
• Multiple parties claim operating rights on adjacent sections with overlapping boundaries.

Practical steps before committing to an interest

• Run a multi-layer overlap report covering permits, leases, and pipeline corridors.
• Compare pipeline capacity figures to the planned CO2 transport route.
• Check elevation contours near candidate surface sites before assuming buildability.
• Pull a full deed chain from the relevant recorder and review every assignment.
• Engage counsel familiar with both carbon storage and traditional oil and gas lease language.

A free seven-day Shale Navigator account gives subscribers enough time to overlay sequestration boundaries against permit data, set up weekly email alerts, and pull a parcel report without committing to a paid plan. Anyone weighing a carbon storage acquisition or reviewing an existing mineral position can use the trial to surface conflicts before they show up in production accounting or regulatory filings. The sooner overlaps appear on a map, the cheaper they are to resolve.