{"artifact_id":"L2-463-001","layer":"L2","parent_l1":"L1-463","title":"Seismic Rock Physics (Gassmann) — Nominal + Mismatch Specs","omega":{"dims":{"porosity_phi":[0.05,0.4],"saturation_Sw":[0.0,1.0],"clay_content_Vcl":[0.0,0.6],"differential_pressure_MPa":[5,80]},"type":"range"},"epsilon":{"type":"fn","expression":"30 + 20 * (clay_content_Vcl / 0.1) ** 0.3"},"difficulty_score":0.38,"delta_tier":5,"fingerprint":"19fac9e5cdc703c5632921a999a8ebceebf616d07a43b54e9ccfc014c243def1","status":"testnet","submitted_by":"mainnet_mirror","chain_hash":"0x9ceb10d8af7f2d44eb96299345263a55ab2eab22225d31dbf40cc0077d0ef819","chain_tx_hash":"0x35afc50e4ce5e56cf5e0320a4e4a1c18d4ea923ec6b12e5ec7637a4d5ba8b7de","chain_block":41555283}