{"artifact_id":"L1-464","layer":"L1","title":"Arps Decline Curve Analysis","domain":"Petroleum Engineering","sub_domain":"Production forecasting","physics_fingerprint":{"L_DAG":2.0,"title":"Arps Decline Curve Analysis","domain":"Petroleum Engineering","carrier":"N/A","primitives":["N.pointwise","O.least_squares.nls","S.bootstrapping.uncertainty"],"sub_domain":"Production forecasting","noise_model":"lognormal","problem_class":"parameter_estimation","solution_space":"decline_parameter_vector","difficulty_delta":3,"integration_axis":"temporal_production","sensing_mechanism":"production_decline_fitting"},"observable_profile":{"metric":"EUR_prediction_RMSE_percent","regime":"Existence of the recovered decline_parameter_vector 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 ~= 10); rate_interference_from_offset_wells dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Lognormal sets the irreducible data-fidelity floor.","secondary":"rate_match_RMSE_percent"},"size_tiers":{"center_spec":{"omega":{"q_i_bopd":500,"b_exponent":1.5,"D_i_per_month":0.05,"N_months_history":24},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"production_decline_fitting","epsilon_fn_center":"15 EUR_prediction_RMSE_percent"},"omega_bounds":{"q_i_bopd":[10,100000],"b_exponent":[0.0,2.0],"D_i_per_month":[0.01,0.5],"N_months_history":[6,120]},"epsilon_bounds":{"EUR_prediction_RMSE_percent":[3,50]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["N_months_history","q_i_bopd","D_i_per_month","b_exponent"],"allowed_forward_operators":["production_decline_fitting"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":200,"metric":"EUR_prediction_RMSE_percent"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xee068934b9db9a1d8314c260f50c43460e48cf39c84f686ed6afe33cd6a730a6","chain_tx_hash":"0x81edc2ef5a403072191f9ae75c4d8fa6de26aa65902981cb8808437124498940","chain_block":41555280}