{"artifact_id":"L1-460","layer":"L1","title":"Reservoir History Matching","domain":"Petroleum Engineering","sub_domain":"Inverse modeling","physics_fingerprint":{"L_DAG":5.0,"title":"Reservoir History Matching","domain":"Petroleum Engineering","carrier":"acoustic","primitives":["S.ensemble.kalman_filter_reservoir","O.iter","O.misfit.production"],"sub_domain":"Inverse modeling","noise_model":"observation_gaussian","problem_class":"nonlinear_inverse","solution_space":"3D_permeability_field","difficulty_delta":10,"integration_axis":"production_history","sensing_mechanism":"reservoir_production_data_matching"},"observable_profile":{"metric":"production_NRMS_match","regime":"Existence of the recovered 3D_permeability_field is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 100000.0); structural_uncertainty dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Observation gaussian sets the irreducible data-fidelity floor.","secondary":"permeability_uncertainty_reduction"},"size_tiers":{"center_spec":{"omega":{"N_cells":50000,"N_wells":20,"N_ensemble":100,"production_years":30},"input_format":"measurement_only","problem_class":"nonlinear_inverse","forward_operator":"reservoir_production_data_matching","epsilon_fn_center":"0.10 production_NRMS_match"},"omega_bounds":{"N_cells":[1000,500000],"N_wells":[5,100],"N_ensemble":[50,1000],"production_years":[5,60]},"epsilon_bounds":{"production_NRMS_match":[0.02,0.5]},"allowed_problem_classes":["nonlinear_inverse"],"allowed_omega_dimensions":["N_cells","N_wells","N_ensemble","production_years"],"allowed_forward_operators":["reservoir_production_data_matching"]},"hardness_fn":{"type":"epsilon_fn","delta":10,"kappa":100000000.0,"metric":"production_NRMS_match"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x7caf924efbe92b76a31b36174184241d0f295450540d95438b24d73f186c47df","chain_tx_hash":"0x45cdbbb49e8fdd172d82ab435f6c6311aaf36df7a436e9cde979c6e1d470ba74","chain_block":41555279}