US 2024/0125720 A1Published application

Method for evaluating the thermal evolution of crude oils from different origins by ultra-high resolution mass spectrometry

AssigneesPetroleo Brasileiro S.A. - Petrobras, Universidade Federal De Goias

InventorsRODRIGO CABRAL DA SILVA, DANIELLE MITZE MULLER FRANCO, YGOR DOS SANTOS ROCHA, JOELMA PIMENTEL LOPES, GABRIEL HENRY MORAIS DUFRAYER, MÁRIO DUNCAN RANGEL, ROSANA CARDOSO LOPES PEREIRA, BONIEK GONTIJO VAZ, TAYNARA RODRIGUES COVAS, JUSSARA VALENTE ROQUE, ROSINEIDE COSTA SIMAS

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Abstract

The invention teaches a method proposing two new indices for evaluating thermal evolution in oils from different basins and organofacies. The first index is based on the distribution ratio of high molecular weight sulfur compounds, belonging to the DBE 6 (benzothiophene) and DBE 9 (dibenzothiophene) series. The second index, called TEI, was created from the profile of aromatic hydrocarbons and molecules containing N, O and S. Both parameters were obtained from the direct characterization of the oils, by using the photoionization at atmospheric pressure (APPI) technique combined with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS).

Claims1

Dependent claims

A method for evaluating the thermal evolution of crude oils from different origins by ultra-high resolution mass spectrometry, comprising:

(a) preparing the oil sample by dissolving the same in toluene/methanol;
(b) analyzing the oil solution prepared in step (a) by the atmospheric pressure photoionization (APPI) technique combined with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS);
(c) processing the spectrum;
(d) assigning molecular formulas by Composer software to the detected signals;
(e) analyzing and interpreting the graphical data by Thanus software to obtain the first index, which is calculated by the ratio of dibenzothiophene (DBT)/benzothiophene (BT);
and
(f) analyzing the images of the DBE x CN graph to obtain the second thermal evolution index (TEI) calculated by (Q1+Q4)/(Q1+Q2+Q3+Q4+Q5+Q6+Q7+Q8).

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Dependencies are inferred from the claim text.

Facts

Application: 18/476,786Filed 28 Sep 2023
Priority: BR 10 2022 019806 330 Sep 2022
Published: 18 Apr 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

G01N 24/14
Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects: by using…
G01N 1/4044
Concentrating samples: by chemical techniques; Digestion; Chemical decomposition
E21B 49/005
Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to…:…
E21B 49/0875
Well testing, e.g. testing for reservoir productivity or formation parameters: determining specific fluid parameters