{"id":"W2023542860","doi":"10.2118/81998-ms","title":"Economics of Nigerian Marginal Oil Fields","year":2003,"lang":"en","type":"article","venue":"SPE Hydrocarbon Economics and Evaluation Symposium","topic":"Capital Investment and Risk Analysis","field":"Economics, Econometrics and Finance","cited_by":17,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Alberta","funders":"","keywords":"Net present value; Discounted cash flow; Profitability index; Cash flow; Present value; Investment (military); Marginal cost; Economics; Marginal value; Economic risk; Economic analysis; Oil field; Value (mathematics); Internal rate of return; Finance; Actuarial science; Petroleum engineering; Engineering; Computer science; Microeconomics; Agricultural economics; Production (economics)","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0006514759,0.00008800207,0.0001155507,0.0005029799,0.0006481255,0.001463771,0.0001812561,0.0003574033,0.003500991],"category_scores_gemma":[0.00144969,0.000104594,0.0001130725,0.0002309887,0.001277812,0.0009554705,0.0007139654,0.0004882186,0.0001014017],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.002579374,"about_ca_system_score_gemma":0.001741168,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.005208273,"about_ca_topic_score_gemma":0.006284864,"domain_scores_codex":[0.9995837,0.0001485374,0.000013811,0.00002565297,0.0001195394,0.0001088662],"domain_scores_gemma":[0.9993551,0.0002293943,0.000143796,0.00003246445,0.0001385542,0.0001006479],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"observational","study_design_scores_codex":[0.0002750936,0.0001080614,0.02294774,0.0001015273,0.00001512626,0.001580011,0.0006963615,0.03664914,0.00302819,0.8959014,0.001841627,0.03685575],"study_design_scores_gemma":[0.0001045561,0.0005287976,0.1031528,0.0004947943,0.00003829866,0.002620391,0.008244009,0.1013667,0.005052103,0.6430577,0.13524,0.00009983616],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8912838,0.001353533,0.008489154,0.002661641,0.00002374659,0.00008455283,0.0001080809,0.000009224363,0.09598626],"genre_scores_gemma":[0.9953796,0.0002553939,0.0004271789,0.0000324437,0.000004543784,0.0000126612,0.00000976538,9.570425e-7,0.003877507],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.005208273,"threshold_uncertainty_score":0.01871479,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02489494901360974,"score_gpt":0.2230321160571487,"score_spread":0.1981371670435389,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}