scholarly journals Study of the Radical Chain Mechanism of Hydrocarbon Oxidation for In Situ Combustion Process

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Alexandra Ushakova ◽  
Vladislav Zatsepin ◽  
Mikhail Varfolomeev ◽  
Dmitry Emelyanov
Keyword(s):  
Heat Release ◽  
Oil Recovery ◽  
Combustion Process ◽  
Chain Process ◽  
Oxidation Reactions ◽  
Scanning Calorimetry ◽  
Radical Chain ◽  
Initial Oxidation ◽  
In Situ Combustion

Despite the abundance of in situ combustion models of oil oxidation, many of the effects are still beyond consideration. For example, until now, initial stages of oxidation were not considered from a position of radical chain process. This is a serious difficulty for the simulation of oil recovery process that involves air injection. To investigate the initial stages of oxidation, the paper considers the sequence of chemical reactions, including intermediate short-living compounds and radicals. We have attempted to correlate the main stages of the reaction with areas of heat release observed in the experiments. The system of differential equations based on the equations of oxidation reactions was solved. Time dependence of peroxides formation and start of heat release is analytically derived for the initial stages. We have considered the inhibition of initial oxidation stages by aromatic oil compounds and have studied the induction time in dependence on temperature. Chain ignition criteria for paraffins and crude oil in presence of core samples were obtained. The calculation results are compared with the stages of oxidation that arise by high-pressure differential scanning calorimetry. According to experimental observations we have determined which reactions are important for the process and which can be omitted or combined into one as insignificant.

Kinetics of Wet In-Situ Combustion: A Review of Kinetic Models

2014 ◽  
Author(s):  
E. A. Cavanzo ◽  
S. F. Muñoz ◽  
A.. Ordoñez ◽  
H.. Bottia
Keyword(s):  
Kinetic Model ◽  
Crude Oil ◽  
Kinetic Models ◽  
Combustion Front ◽  
Chemical Interaction ◽  
Combustion Process ◽  
Oxidation Reactions ◽  
In Situ Combustion ◽  
Temperature Oxidation

Abstract In Situ Combustion is an enhanced oil recovery method which consists on injecting air to the reservoir, generating a series of oxidation reactions at different temperature ranges by chemical interaction between oil and oxygen, the high temperature oxidation reactions are highly exothermic; the oxygen reacts with a coke like material formed by thermal cracking, they are responsible of generating the heat necessary to sustain and propagate the combustion front, sweeping the heavy oil and upgrading it due to the high temperatures. Wet in situ combustion is variant of the process, in which water is injected simultaneously or alternated with air, taking advantage of its high heat capacity, so the steam can transport heat more efficiently forward the combustion front due to the latent heat of vaporization. A representative model of the in situ combustion process is constituted by a static model, a dynamic model and a kinetic model. The kinetic model represents the oxidative behavior and the compositional changes of the crude oil; it is integrated by the most representative reactions of the process and the corresponding kinetic parameters of each reaction. Frequently, the kinetic model for a dry combustion process has Low Temperature Oxidation reactions (LTO), thermal cracking reactions and the combustion reaction. For the case of wet combustion, additional aquathermolysis reactions take place. This article presents a full review of the kinetic models of the wet in situ combustion process taking into account aquathermolysis reactions. These are hydrogen addition reactions due to the chemical interaction between crude oil and steam. The mechanism begins with desulphurization reactions and subsequent decarboxylation reactions, which are responsible of carbon monoxide production, which reacts with steam producing carbon dioxide and hydrogen; this is the water and gas shift reaction. Finally, during hydrocracking and hydrodesulphurization reactions, hydrogen sulfide is generated and the crude oil is upgraded. An additional upgrading mechanism during the wet in situ combustion process can be explained by the aquathermolysis theory, also hydrogen sulphide and hydrogen production can be estimated by a suitable kinetic model that takes into account the most representative reactions involved during the combustion process.

Improving heavy oil oxidation performance by oil-dispersed CoFe2O4 nanoparticles in In-situ combustion process for enhanced oil recovery

Fuel ◽  
2021 ◽  
Vol 285 ◽  
pp. 119216
Author(s):  
Seyedsaeed Mehrabi-Kalajahi ◽  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan ◽  
Almaz L. Zinnatullin ◽  
Nikolay O. Rodionov ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Combustion Process ◽  
Oil Oxidation ◽  
Cofe2o4 Nanoparticles ◽  
In Situ Combustion ◽  
Oxidation Performance

scholarly journals TRAVELING WAVES FOR IN-SITU COMBUSTION IN POROUS MEDIA

2020 ◽  
Vol 5 (6) ◽  
Author(s):  
Tatiana Danelon De Assis ◽  
Mariane Dos Santos Bispo ◽  
Jessica Yvonne Santa Cruz Cárdenas ◽  
Giulia Carvalho Fritis ◽  
Angel Enrique Ramírez Gutiérrez ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Oil Recovery ◽  
Traveling Waves ◽  
Traveling Wave ◽  
Necessary Conditions ◽  
Combustion Process ◽  
Traveling Wave Solution ◽  
In Situ Combustion ◽  
Theoretical Results

This work presents a mathematical model describing the in-situ combustion process, which can be used in enhanced oil recovery. The hyperbolic part of the system was solved as a Riemann Problem. Necessary conditions for the existence of a traveling wave solution were verified. Furthermore, theoretical results are verified by using numerical simulations.

A New, Fast, and Efficient Method for Evaluating the Influence of Catalysts on In-Situ Combustion Process for Heavy Oil Recovery

2018 ◽  
Author(s):  
Kamil Sadikov ◽  
Chengdong Yuan ◽  
Seyed Saeed Mehrabi-Kalajahi ◽  
Mikhail A. Varfolomeev ◽  
Sarvardzhon A. Talipov
Keyword(s):  
Oil Recovery ◽  
Efficient Method ◽  
Heavy Oil ◽  
Combustion Process ◽  
Heavy Oil Recovery ◽  
In Situ Combustion

Effect of copper stearate as catalysts on the performance of in-situ combustion process for heavy oil recovery and upgrading

2021 ◽  
pp. 109125
Author(s):  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan ◽  
Alexander V. Bolotov ◽  
Ilgiz F. Minhanov ◽  
Seyedsaeed Mehrabi-Kalajahi ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Combustion Process ◽  
Heavy Oil Recovery ◽  
In Situ Combustion ◽  
Effect Of Copper

Chemical Aspects of In-Situ Combustion - Heat of Combustion and Kinetics

1972 ◽  
Vol 12 (05) ◽  
pp. 410-422 ◽  
Author(s):  
J.G. Burger
Keyword(s):  
Porous Media ◽  
Combustion Front ◽  
Combustion Process ◽  
Heat Of Combustion ◽  
Oxidation Reactions ◽  
In Situ Combustion ◽  
Oxidation Of Hydrocarbons ◽  
Kinetics Of ◽  
Heat Released

Abstract General remarks on the oxidation reactions of hydrocarbons involved in in-situ combustion are followed by estimates of heat releases. A formula is derived for computing the heat of combustion in the high-temperature zone. Reaction kinetics in porous media applied to the in-situ combustion porous media applied to the in-situ combustion process is discussed. It is observed that there is process is discussed. It is observed that there is some similarity between the kinetics of reverse and partially quenched combustion processes. The influence of additives on crude oil oxidation in porous media is illustrated by effluent gas analysis experiments. Some information concerning the values of the kinetic parameters of the reaction controlling the velocity of a reverse combustion front is derived from the interpretation of laboratory experiments, using a numerical model. Introduction A great deal of laboratory and field work has been done on thermal recovery methods. The importance and limitations of these techniques have been extensively studied. However, some of the chemical and physical problems involved that needed to be elucidated were studied as part of a research program carried out by the Institut Francais du Petrole. Specific problems are created by in-situ combustion since both the possibility of combustion-front propagation and the air requirement are controlled by the extent of the exothermic oxidation reactions. Actually, the propagation velocity of a forward combustion front depends on the fuel formation and combustion, which are controlled by the kinetics of these processes; furthermore, the peak temperature is related to the heat released by oxidation and combustion reactions. Therefore, a quantitative estimation of the parameters related to the chemical aspects of the parameters related to the chemical aspects of the process is a necessary step in studying combustion process is a necessary step in studying combustion through a porous medium. General and theoretical considerations on heats of reaction and kinetics are presented and illustrated by experimental data and numerical interpretation of the results. HEAT RELEASED IN THE OXIDATION OF HYDROCARBONS DESCRIPTION OF OXIDATION REACTIONS A great number of reaction products are produced by the oxidation of hydrocarbons. By taking into account the formation of bonds between one carbon atom and oxygen, it is possible to derive the most important processes. Complete combustion, (1) 2 2 2 2H H3R C R  +  ---- O  → RR  +  CO + H O Incomplete combustion, (2) 2 2H H R C R  +  O  → RR  +  CO  +  H O Oxidation to carboxylic acid, (3) 2 2 2H OH H3 OR C H  +  --- O  → R - C  +  H O Oxidation to aldehyde, (4) H H R C Oxidation to ketone, (5) 2 2H O H R C R '  +  O  → R - C - R;  +  H O Oxidation to alcohol, (6) R' R; R C H SPEJ p. 410

How the In-Situ Combustion Process Works in a Fractured System: 2D Core- and Block-Scale Simulation

2010 ◽  
Vol 13 (01) ◽  
pp. 118-130 ◽  
Author(s):  
H.. Fadaei ◽  
G.. Debenest ◽  
A.M.. M. Kamp ◽  
M.. Quintard ◽  
G.. Renard
Keyword(s):  
Oil Recovery ◽  
Combustion Process ◽  
Oil Production ◽  
Grid Size ◽  
Viscosity Reduction ◽  
Minor Effect ◽  
Fine Grid ◽  
In Situ Combustion ◽  
Matrix Block

Summary Simulation of an in-situ combustion (ISC) process was performed for a fractured system at core and matrix-block scales. The aim of this work was: (1) To predict the ISC extinction/propagation condition(s), (2) understand the mechanism of oil recovery, and (3) provide some guidelines for ISC upscaling for a fractured system. The study was based on a fine-grid, single-porosity, multiphase, and multicomponent simulation using a thermal reservoir simulator. First, the simulator was validated for 1D combustion using the corresponding analytical solutions. 2D combustion was validated using experimental results available in the literature. It was found that the grid size should not be larger than the combustion-zone thickness in order for the results to be independent of grid size. ISC in the fractured system was strongly dependent on the oxygen diffusion coefficient, while the matrix permeability played an important role in oil production. The effect of each production mechanism was studied separately whenever it was possible. Oil production is governed mainly by oil drainage because of gravity force, which is enhanced by viscosity reduction; possible pressure-gradient generation in the ISC process seems to have a minor effect. The nature (oil-production rate, saturations distribution, shape of the combustion front) of ISC at core scale was different from that in a single block with surrounding fracture. The important characteristics of different zones (i.e., combustion, coke, and oil zones) at block scale were studied, and some preliminary guidelines for upscaling are presented.

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