Terra-only interim release

Johansen CO2 results through 25 years

These preliminary figures come from Terra model and result data. The latest published field is stored at 25.00694 years. The 37.5-year and 50-year continuation outputs are still running on the University of Luxembourg HPC system.

Terra data onlyLatest field: 25.00694 years37.5 and 50 years: running on HPCPlanned refresh: 16 July 2026

Preliminary scientific release

Available now, with the limits stated plainly

The four images below are bound to the checked Terra-only manifest. They support inspection of the model input and plume evolution through approximately 25 years. They do not authorize an exact pairwise validation claim.

12.5 yearsAvailable

Terra top-surface CO2 saturation during the injection phase.

25.00694 yearsAvailable

Terra top-surface and exterior-boundary saturation near the nominal shutoff.

37.5 yearsRunning on HPC

No plot is published for this time. The validated output will replace this card when available.

50 yearsRunning on HPC

No plot is published for this time. The validated output will replace this card when available.

Physics and assumptions

Two-phase brine and supercritical CO2 flow with gravity.
No dissolved CO2 in the brine.
A prescribed geothermal temperature profile.
Spatially varying porosity and intrinsic permeability.
Brooks-Corey capillary pressure with phase relative permeability.

Porosity range0.16259-0.25049

Permeability range26-364 mD

Injection plateau15 kg/s

Latest published field25.00694 years

Initial and boundary conditions for the interim Johansen Terra model
Condition	Applied value	Physical role
Initial brine state	Hydraulic head H = 0 m	Hydrostatic pressure with depth
Initial free CO2	Saturation = 0	Brine-filled formation before injection
Open side boundaries	H = 0 m; CO2 saturation = 0	Far-field hydrostatic state
Sealed faces	No phase flow	Top, base and sealed lateral faces
Well source	15 kg/s plateau; smoothed start and shutoff	CO2 injection through the nominal 25-year phase

Terra result atlas

Published fields through 25.00694 years

All four image sets were generated from Terra data and checked against the interim manifest before the opt-in website build.

Terra Johansen porosity mapped on the exterior boundary surface — **Formation porosity [-].** Terra maps the heterogeneous Johansen porosity input to the exterior boundary surface. The input range is 0.16259-0.25049.

Terra top-surface CO2 saturation at 12.5 years — **Top-surface CO2 saturation at 12.5 years [-].** The gas-rich region spreads away from the injection location along the heterogeneous formation.

Terra CO2 saturation on the exterior boundary surface at 25.00694 years — **Three-dimensional CO2 saturation at 25.00694 years [-].** The view records the available near-shutoff Terra field. It is preliminary and is not presented as an exact pairwise match.

Terra top-surface CO2 saturation at 25.00694 years — **Top-surface CO2 saturation at 25.00694 years [-].** Compared with 12.5 years, the plume has spread farther through the higher-mobility parts of the formation while remaining spatially uneven.

The preliminary Terra fields show a buoyant, laterally spreading plume shaped by heterogeneous rock properties.

The 12.5-year field captures growth during injection. The near-25-year views show the broader footprint around the nominal shutoff interval.

The later redistribution cannot be interpreted from these images. That conclusion waits for the validated 37.5-year and 50-year continuation outputs.

Fail-closed provenance

Each published image is hash-bound

The interim build checks the source manifest, the Terra project hash, the four image hashes, byte counts and decoded dimensions. Any mismatch stops the build.

Preliminary - exact pairwise validation not authorized

Terra project SHA-256: 0f8998379c257f8d79ace54f11e111a6957d6356e596d1cf1f7b2488dd46cfd3

Source provenance manifest SHA-256: 898a8257c3a957a18460eafe5f88b187125acd7cebb4abf058b97ce9ff6a28d1

Read the public interim manifest