2019
DOI: 10.1007/s12182-019-0341-7
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Organic bases as additives for steam-assisted gravity drainage

Abstract: Steam-assisted gravity drainage (SAGD) is a mature technology for bitumen recovery from oil sands. However, it is an energy-intensive process that requires large amounts of steam to heat and mobilize bitumen. The purpose of this work is to develop ways to enhance SAGD performance through the use of organic base additives. The research is approached from three focus areas that supplement and guide each other: characterization tests, sand-pack floods, and computational simulation. A number of key mechanisms for … Show more

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Cited by 7 publications
(4 citation statements)
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“…The microsphere is composed of an internal core and a layer of coating materials (Figure 1). The internal core is made of ultralight ceramsite, with a bulk density between 1.06 g/cm 3 and 1.25 g/cm 3 . A nominal breaking rate of the ceramsite varying from 3.5% to 18% under 52MPa is recorded by the manufacturer (Beijing Qisintal New Material Co., Ltd, Beijing, China).…”
Section: Microspherementioning
confidence: 99%
See 1 more Smart Citation
“…The microsphere is composed of an internal core and a layer of coating materials (Figure 1). The internal core is made of ultralight ceramsite, with a bulk density between 1.06 g/cm 3 and 1.25 g/cm 3 . A nominal breaking rate of the ceramsite varying from 3.5% to 18% under 52MPa is recorded by the manufacturer (Beijing Qisintal New Material Co., Ltd, Beijing, China).…”
Section: Microspherementioning
confidence: 99%
“…Steam injection has been acknowledged as one of the most effective approaches for heavy-oil exploitation [1][2][3]. Nevertheless, due to the great density disparity, steam tends to flow in the upper reservoir (the so-called "gravity override"), which aggravates as the reservoir thickness increases [4,5].…”
Section: Introductionmentioning
confidence: 99%
“…These chemicals can be obtained from vegetal oils [11][12][13] or extracted from plants over fermentation processes. [14][15][16] Another method to improve displacement efficiency is using a surfactant or alkaline solution, with concentrations up to 5 %, that changes the interfacial tension and generally produces oil-in-water emulsions that are less viscous fluids. [17][18][19] However, the fluid-rock interactions that are present in the extraction processes have to be considered.…”
Section: Introductionmentioning
confidence: 99%
“…Alkaline flooding has been found to be an efficient and economical enhanced oil recovery (EOR) technique for decades. In recent years, alkalis have also been integrated with other EOR techniques such as steam-assisted gravity drainage (SAGD), surfactant and/or polymer flooding, and nanoparticle-assisted processes by taking the advantages of reducing the surfactant adsorption loss, protecting surfactant against divalent ions, and reacting with the petroleum acids to form in situ surfactant . The in situ generated surfactant helps to reduce the interfacial tension (IFT) between oil and the aqueous phase, while amphiphilic components (e.g., resins, asphaltenes, and natural petroleum acids) in crude oil strengthen the stability of a water–oil emulsion. , The lower the IFT is, the more easily the crude oil could be emulsified with water. , Once an O/W emulsion is formed, the mobility of the oil phase can be greatly improved .…”
Section: Introductionmentioning
confidence: 99%