Molecular composition of low-temperature oxidation products in a simulated crude oil In-situ combustion

Li, Yunyun; Liao, Guangzhi; Wang, Zhengmao; Su, Run; Ma, Shugen; Zhang, H.; Wang, Liangang; Wang, Xusheng; Pan, Jingjun; Shi, Quan

doi:10.1016/j.fuel.2022.123297

Cited by 14 publications

(9 citation statements)

References 30 publications

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“…[11][12][13] For oil spills in aqueous environments, the most commonly used oil-water separation methods can be divided into three major classes: biological treatment, chemical treatment and physical/mechanical treatment. 14,15 Specifically, examples include bio-oxidation separation, enzyme treatment; [16][17][18][19][20] coagulant treatment, 21,22 electrical separation, 23 in situ combustion; 24,25 gravity separation, [26][27][28] skimmers, 29,30 filtration separation, 31 centrifugal separation, 32 adsorption separation and so on. However, chemical methods and biological methods can also cause secondary pollution and have high requirements for water intake, professional maintenance, and high infrastructure costs.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in functional micro/nanomaterials for removal of crude oil via thermal effects

Yan,

Yin,

et al. 2024

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Recent advances in functional micro/nanomaterials for removal of crude oil via thermal effects

Yan,

Yin,

et al. 2024

Nanoscale

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“…Zhao et al 28 explored a new route to investigate the compositional changes of a heavy crude oil caused by LTO using both gas chromatography-mass spectroscopy and (−) ESI FT-ICR MS, proposing reaction pathways of crude oil to understand LTO mechanisms. More recently, Li et al 29 studied the molecular composition of a heavy crude oil submitted to a thermal oxidation experiment to investigate the molecular changes associated with coke formation during ISC. The main components of the oxidation turned out to be methanol soluble and consist with highly oxygenated species.…”

Section: Introductionmentioning

confidence: 99%

Compositional Effect on the Low-Temperature Oxidation of Crude Oils Subjected to In Situ Combustion

et al. 2023

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This work shows the compositional effect on low-temperature oxidation of crude oils subjected to in situ combustion (ISC). Three heavy crudes were used in this study in which detailed information on the molecular species involved in ISC was obtained by ultra-high-resolution mass spectrometry. The oxidation was carried out on a mixture of 2% of crude oil in Ottawa sand in an isothermal cell using a batch system at 1500 psi at three conditions: (i) reservoir temperature of each crude oil, (ii) 180 °C, and (iii) 180 °C using a heterogeneous catalyst-type β-MnO 2 . The oil remaining after the reaction was extracted from the sand and characterized by FT-ICR MS using (+) atmospheric pressure photoionization and (−) electrospray ionization modes. The acidity of the oxidation products (extracts) and the composition of the produced carbon oxides were also monitored. A greater amount of carbon oxides produced, a lower extraction yield of organic matter in the sand after the reaction, and a higher acidity in the extracts, implied a higher reactivity. In the same sense, a higher reactivity was observed for the sample with the highest sulfur content and over the most aromatic compounds. The use of the catalyst at 180 °C promoted the oxidative reactions in two of three of the oils, as well as the formation of polyoxygenated acids over monocarboxylic acids for one of the oils, which implies that the application of this technology strongly depends on the composition of the oil.

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“…The chemical reactions generated during the ISC process can be divided into three temperature ranges: low-temperature oxidation (LTO), middle-temperature oxidation/fuel deposition (MTO), and high-temperature oxidation/combustion (HTO) . LTO enhances the amount of fuel available during HTO and affects the physical properties of the crude oil. − In presence of water, aquathermolysis reactions are generated (hydropyrolysis) with production of acid gases, such as CO 2 and H 2 S. ,− Cracking occurs throughout the temperature range, but generally prevails at high temperatures . It is also related to the API gravity of the crude oil, but the ISC occurs over the LTO and HTO.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have reported that due to complex multiple chemical reactions and multiphase flow physics, the stability of the displacement front during the ISC processes is not well understood, − and it is complex to describe and define. The chemical reactions generated during the ISC process can be divided into three temperature ranges: low-temperature oxidation (LTO), middle-temperature oxidation/fuel deposition (MTO), and high-temperature oxidation/combustion (HTO) . LTO enhances the amount of fuel available during HTO and affects the physical properties of the crude oil. − In presence of water, aquathermolysis reactions are generated (hydropyrolysis) with production of acid gases, such as CO 2 and H 2 S. ,− Cracking occurs throughout the temperature range, but generally prevails at high temperatures .…”

Section: Introductionmentioning

confidence: 99%

Workflow of the In Situ Combustion EOR Method in Venezuela: Challenges and Opportunities

Rodriguez¹,

Llamedo

Belhaj

et al. 2023

ACS Omega

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In situ combustion (ISC) is one of the oldest thermal enhanced oil recovery methods to have been applied in Venezuela to increase the production of highly viscous crude oils, with a first field application in 1959 in the Tia Juana Field-Lake Maracaibo Basin. This method, which is characterized by high energy efficiency, consists of injecting air into the reservoir where exothermic oxidation reactions initiate to increase the mobility of the oil. Compared to other thermal enhanced oil recovery methods such as steam injection, ISC has a lower environmental impact in terms of water and fuel consumption, and emission of gases as the produced gases can be reinjected or stored. Several ISC projects have been carried out in Venezuela in Tia Juana, Morichal, Miga, and Melones fields. Although the technical results have been satisfactory in terms of viscosity reduction and improved crude oil properties (such as °API), other important aspects of project evaluations have not been convincing due to the following factors: high temperatures in producing wells, acid gases management, generation of complex emulsions, corrosion, and high CAPEX and OPEX costs. Nevertheless, additional research work has been conducted on process optimization, using catalysts and hydrogen donors, to better address these other factors. Due to the great need to increase hydrocarbon production in Venezuela and to the advantages of ISC as an upgrading technique where low-carbon fuels and hydrogen as byproducts are generated, this paper presents a revisit of ISC projects in Venezuela from R&D technical aspects to field applications. It seeks to identify the main insights regarding the success and failure of the evaluated projects and make substantiated recommendations in the case of future applications of this technology.

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Molecular composition of low-temperature oxidation products in a simulated crude oil In-situ combustion

Cited by 14 publications

References 30 publications

Recent advances in functional micro/nanomaterials for removal of crude oil via thermal effects

Recent advances in functional micro/nanomaterials for removal of crude oil via thermal effects

Compositional Effect on the Low-Temperature Oxidation of Crude Oils Subjected to In Situ Combustion

Workflow of the In Situ Combustion EOR Method in Venezuela: Challenges and Opportunities

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