Evaluation of superior caloric energy as a pricing tool for Brazilian crude oil
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- Keywords:
- TBP (True Boiling Point), ); Gross Calorific Value (GCV), Index for price fixation.
- Abstract
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Geological factors exert influence on the physicochemical properties and molecular composition of crude oil. Independent onshore operators often face challenges in conducting routine crude characterization assays, primarily due to the high analytical complexity and associated costs. Nevertheless, such assays are critical, as crude oil pricing is conventionally established by benchmarking distillate derived from the True Boiling Point (TBP) curve of the crude sample with a reference crude. This study introduces a new pricing index for Brazilian crudes based on the Gross Calorific Value (GCV), proposed as a cost-effective to the TBP curve. Using ANP data from 84 crude streams (July 2019), GCV was estimated from commercial distillate fractions (naphtha/gasoline, ultra-low sulfur diesel – ULSD, and residual fuel oil) and compared against the official methodology defined in ANP Resolution No. 874/2022, yielding an average deviation of 4.58%. A statistical validation was performed using a t-test and Deming orthogonal regression with 95% confidence intervals via bootstrap resampling (2000 replicates), confirming methodological equivalence with a correlation coefficient of r = 0.99. An adjustment equation was derived to correct systematic bias. Findings demonstrate that HHV is a technically viable surrogate for TBP in crude valuation; however, it is emphasized that the GCV of each stream must be experimentally determined in accordance with ASTM D4809, ensuring metrological traceability and regulatory compliance.
- Author Biographies
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- 2026-11-11
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Copyright (c) 2026 Aguiar, P. H. V., Canal, M. O., Fraga, T. C., Negris de Barcellos, S., Barcelos, M. V., Assunção, L. S. D. de, Decoté, P. A. P., Meneguelo, A. P., Vicente, M. de A., & Santos, M. de F. P. dos.

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