Downhole heavy crude oil upgrading using CAPRI : effect of steam upon upgrading and coke formation

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Downhole heavy crude oil upgrading using CAPRI : effect of steam upon upgrading and coke formation. / Hart, Abarasi; Leeke, Gary; Greaves, Malcolm; Wood, Joseph.

In: Energy & Fuels, Vol. 28, No. 3, 20.03.2014, p. 1811-1819.

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@article{7fc206102d484628ad496251336d79a0,
title = "Downhole heavy crude oil upgrading using CAPRI : effect of steam upon upgrading and coke formation",
abstract = "Heavy crude oil and bitumen are characterized by a low yield of light distillates in the range of 10–30% with a boiling point below 350 °C, high density (low API gravity), high viscosity, and high heteroatom content, which impede their exploitation. In this study, the catalytic upgrading process in situ (developed by the Petroleum Recovery Institute, Canada) add-on to the toe-to-heel air injection for the extraction and upgrading of heavy oil and bitumen downhole was investigated. The effect of steam addition and steam-to-oil ratio upon upgrading, coke formation, sulfur and metal removal were examined using a Co–Mo/γAl2O3 catalyst at a reaction temperature of 425 °C, pressure of 20 bar, gas-to-oil ratio of 500 mL·mL–1, and steam-to-oil ratio in the range of 0.02–0.1 mL·mL–1. It was observed that the coke content of the spent catalyst reduced from 17.02 to 11.3 wt % as the steam-to-oil ratio increased from 0.02 to 0.1 mL·mL–1 compared to 27.53 wt % obtained with only nitrogen atmosphere after 15 h time-on-stream. Over the same range of conditions, 88–92% viscosity reduction was obtained as steam-to-oil ratio increased compared to 85.5% in nitrogen atmosphere only, a substantial reduction from the value of 1.091 Pa·s for the feed oil. It was also found that although desulfurization increased from 3.4% in a steam-free atmosphere to 16–25.6% over the increasing range of steam flows investigated, demetallization increased from 16.8% in a steam-free environment to 43–70.5% depending on the increasing steam-to-oil ratio.",
author = "Abarasi Hart and Gary Leeke and Malcolm Greaves and Joseph Wood",
year = "2014",
month = mar,
day = "20",
doi = "10.1021/ef402300k",
language = "English",
volume = "28",
pages = "1811--1819",
journal = "Energy & Fuels",
issn = "0887-0624",
publisher = "American Chemical Society",
number = "3",

}

RIS

TY - JOUR

T1 - Downhole heavy crude oil upgrading using CAPRI : effect of steam upon upgrading and coke formation

AU - Hart, Abarasi

AU - Leeke, Gary

AU - Greaves, Malcolm

AU - Wood, Joseph

PY - 2014/3/20

Y1 - 2014/3/20

N2 - Heavy crude oil and bitumen are characterized by a low yield of light distillates in the range of 10–30% with a boiling point below 350 °C, high density (low API gravity), high viscosity, and high heteroatom content, which impede their exploitation. In this study, the catalytic upgrading process in situ (developed by the Petroleum Recovery Institute, Canada) add-on to the toe-to-heel air injection for the extraction and upgrading of heavy oil and bitumen downhole was investigated. The effect of steam addition and steam-to-oil ratio upon upgrading, coke formation, sulfur and metal removal were examined using a Co–Mo/γAl2O3 catalyst at a reaction temperature of 425 °C, pressure of 20 bar, gas-to-oil ratio of 500 mL·mL–1, and steam-to-oil ratio in the range of 0.02–0.1 mL·mL–1. It was observed that the coke content of the spent catalyst reduced from 17.02 to 11.3 wt % as the steam-to-oil ratio increased from 0.02 to 0.1 mL·mL–1 compared to 27.53 wt % obtained with only nitrogen atmosphere after 15 h time-on-stream. Over the same range of conditions, 88–92% viscosity reduction was obtained as steam-to-oil ratio increased compared to 85.5% in nitrogen atmosphere only, a substantial reduction from the value of 1.091 Pa·s for the feed oil. It was also found that although desulfurization increased from 3.4% in a steam-free atmosphere to 16–25.6% over the increasing range of steam flows investigated, demetallization increased from 16.8% in a steam-free environment to 43–70.5% depending on the increasing steam-to-oil ratio.

AB - Heavy crude oil and bitumen are characterized by a low yield of light distillates in the range of 10–30% with a boiling point below 350 °C, high density (low API gravity), high viscosity, and high heteroatom content, which impede their exploitation. In this study, the catalytic upgrading process in situ (developed by the Petroleum Recovery Institute, Canada) add-on to the toe-to-heel air injection for the extraction and upgrading of heavy oil and bitumen downhole was investigated. The effect of steam addition and steam-to-oil ratio upon upgrading, coke formation, sulfur and metal removal were examined using a Co–Mo/γAl2O3 catalyst at a reaction temperature of 425 °C, pressure of 20 bar, gas-to-oil ratio of 500 mL·mL–1, and steam-to-oil ratio in the range of 0.02–0.1 mL·mL–1. It was observed that the coke content of the spent catalyst reduced from 17.02 to 11.3 wt % as the steam-to-oil ratio increased from 0.02 to 0.1 mL·mL–1 compared to 27.53 wt % obtained with only nitrogen atmosphere after 15 h time-on-stream. Over the same range of conditions, 88–92% viscosity reduction was obtained as steam-to-oil ratio increased compared to 85.5% in nitrogen atmosphere only, a substantial reduction from the value of 1.091 Pa·s for the feed oil. It was also found that although desulfurization increased from 3.4% in a steam-free atmosphere to 16–25.6% over the increasing range of steam flows investigated, demetallization increased from 16.8% in a steam-free environment to 43–70.5% depending on the increasing steam-to-oil ratio.

U2 - 10.1021/ef402300k

DO - 10.1021/ef402300k

M3 - Article

VL - 28

SP - 1811

EP - 1819

JO - Energy & Fuels

JF - Energy & Fuels

SN - 0887-0624

IS - 3

ER -