Numerical modeling on in-situ combustion process in the Chichimene field: Ignition stage

Ramirez, Hernando Bottia; Aguillon-Macea, Maria; Lizcano-Rubio, Humberto; Delgadillo-Aya, Claudia Lorena; Gadelle, C.

doi:10.1016/j.petrol.2017.02.023

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…Chichimene is a Colombian extra heavy oil reservoir (9°API) undergoing an engineering project to implement an ISC pilot test. , The field has two producing units. The upper unit is located at 2100–2400 m and is identified as the T2 unit.…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of Pressure on Crude-Oil Kinetics During In Situ Combustion

et al. 2020

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We study the effects of pressure on crude-oil oxidation kinetics using ramped temperature oxidation for a large range of pressures and heating rates (1.5, 2.0, 5.0, 7.5, 8.0, 10.0, 15.0, 20.0, and 30.0 °C/min). Results are relevant to the combustion of crude oil within reservoirs to produce heat and pressure that enhance oil recovery. Our study results suggest that the activation energy of global reactions is sensibly independent of changes in both partial pressure and total pressure (100−2000 psig) with values ranging between 50 and 60 kJ/mol for the low-temperature oxidation regime (roughly 250 °C) and 90−100 kJ/mol for the hightemperature oxidation regime (roughly 350−450 °C). Three different crude oils were tested. For one of the crude oils, we observe an increasing trend in oxygen consumption as the total pressure is increased up to a particular pressure (∼500 psig), after which it remains constant. This trend is, apparently, associated with the evaporation of relatively lighter components at low pressures, decreasing the amount of oil available for fuel generation. Total oxygen consumption starts to decrease again at very large pressures (>1500 psig), and we associate this trend with water phase behavior at these conditions.

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Section: Experimental Methodsmentioning

confidence: 99%

Effect of Pressure on Crude-Oil Kinetics During In Situ Combustion

et al. 2020

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“…Through numerical simulation, Bottia et al found that the delayed ignition indicates high probability to get a spontaneous ignition. Furthermore the distance at which at which ignition occurs can be modified by the air injection rate [21]. Rahnema et al found that the oil displacement is mainly driven by gravity drainage through the experiment and numerical simulation.…”

Section: Research Statusmentioning

confidence: 99%

Numerical Simulation Study of Heavy Oil Production by Using In-Situ Combustion

2019

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An in-situ combustion method is an effective method to enhance oil recovery with high economic recovery rate, low risk, fast promotion and application speed. Currently, in-situ combustion technique is regarded as the last feasible thermal recovery technology to replace steam injection in the exploitation of bitumen sands and heavy oil reservoirs. However, the oil-discharging mechanism during the in-situ combustion process is still not clearly understood. In this paper, the in-situ combustion process has been numerically simulated based on the Du 66 block. The effect of production parameters (huff and puff rounds, air injection speed, and air injection temperature) and geological parameters (bottom water thickness, stratigraphic layering, permeability ratio, and formation thickness) on the heavy oil recovery have been comprehensively analyzed. Results show that the flooding efficiency is positively correlated with the thickness of the bottom water, and negatively correlated with the formation heterogeneity. There exist optimum values for the oil layer thickness, huff and puff rounds, and air injection speed. And the effect of air injection temperature is not significant. The results of this paper can contribute to the understanding of mechanisms during in-situ combustion and the better production design for heavy oil reservoirs.

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“…One of the critical stages of ISC is the formation of a combustion front, which is known as the ignition stage. This ignition can occur spontaneously and be self-sustained if the oxidation reactions [low-temperature oxidation (LTO) reactions] that take place at temperatures below 250 °C release enough heat to overcome the energy barrier to produce more fuel [high-temperature oxidation (HTO) reactions]. , The amount of heat released by these reactions depends on the enthalpy of the reaction and the conversion achieved, and this depends on the reservoir temperature and chemical composition of the oil . Ushakova et al found that ignition and reaction rates were particular for different types of oils.…”

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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Numerical modeling on in-situ combustion process in the Chichimene field: Ignition stage

Cited by 14 publications

References 7 publications

Effect of Pressure on Crude-Oil Kinetics During In Situ Combustion

Effect of Pressure on Crude-Oil Kinetics During In Situ Combustion

Numerical Simulation Study of Heavy Oil Production by Using In-Situ Combustion

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

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