High temperature reactions of water with heavy oil and bitumen: Insights into aquathermolysis chemistry during steam-assisted recovery

Montgomery, W J; Court, Richard W.; Rees, Andrew; Sephton, Mark A.

doi:10.1016/j.fuel.2013.05.098

Cited by 43 publications

(29 citation statements)

References 17 publications

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“…Aquathermolysis experiments were performed on samples of oil sands at 25°C intervals from 150–325°C and corresponding pressures ranging from 100–2000 psi (Table 1). The experimental approach has been previously proved successful for heavy oil samples16.…”

Section: Methodsmentioning

confidence: 99%

Minimising hydrogen sulphide generation during steam assisted production of heavy oil

Montgomery

Sephton

Watson

et al. 2015

Sci Rep

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The majority of global petroleum is in the form of highly viscous heavy oil. Traditionally heavy oil in sands at shallow depths is accessed by large scale mining activities. Recently steam has been used to allow heavy oil extraction with greatly reduced surface disturbance. However, in situ thermal recovery processes can generate hydrogen sulphide, high levels of which are toxic to humans and corrosive to equipment. Avoiding hydrogen sulphide production is the best possible mitigation strategy. Here we use laboratory aquathermolysis to reproduce conditions that may be experienced during thermal extraction. The results indicate that hydrogen sulphide generation occurs within a specific temperature and pressure window and corresponds to chemical and physical changes in the oil. Asphaltenes are identified as the major source of sulphur. Our findings reveal that for high sulphur heavy oils, the generation of hydrogen sulphide during steam assisted thermal recovery is minimal if temperature and pressure are maintained within specific criteria. This strict pressure and temperature dependence of hydrogen sulphide release can allow access to the world's most voluminous oil deposits without generating excessive amounts of this unwanted gas product.

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Section: Methodsmentioning

confidence: 99%

Minimising hydrogen sulphide generation during steam assisted production of heavy oil

Montgomery

Sephton

Watson

et al. 2015

Sci Rep

Self Cite

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“…When heavy oil or bitumen is produced with steam, for example, a common observation is that the produced oil is lighter than the original, which is believed to be a consequence of in situ upgrading processes [12][13][14]. It has been suggested [12,13] that minerals in the oil sands or the products of mineral-steam reactions [14] act to catalyze upgrading reactions (e.g., aquathermolysis [15][16][17]).…”

Section: Oil Sands Structure and Compositionmentioning

confidence: 99%

Interfacial Chemistry in Steam-Based Thermal Recovery of Oil Sands Bitumen with Emphasis on Steam-Assisted Gravity Drainage and the Role of Chemical Additives

Taylor

2018

Colloids and Interfaces

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In this article, the importance of colloids and interfaces in thermal heavy oil or bitumen extraction methods is reviewed, with particular relevance to oil sands. It begins with a brief introduction to the chemical composition and surface chemistry of oil sands, as well as steam-based thermal recovery methods. This is followed by the specific consideration of steam-assisted gravity drainage (SAGD) from the perspective of the interfacial chemistry involved and factors responsible for the displacement of bitumen from reservoir mineral surfaces. Finally, the roles of the different chemical additives proposed to improve thermal recovery are considered in terms of their contributions to recovery mechanisms from interfacial and colloidal perspectives. Where appropriate, unpublished results from the author's laboratory have been used to illustrate the discussions.

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“…Так, в ходе акватермолиза битуминозного песка Осмингтон Милз (Великобритания) [28] при увеличении температуры процесса с 250 до 275 ºС происходит увеличение выхода метана в 10 раз. Поэтому для получения облегченной нефти в процессе акватермолиза целесообразно поддерживать температуру выше 250 ºС.…”

Section: облагораживание тяжелого нефтяного сырья в среде субкритичесunclassified

Heavy Oil Upgrading in the Presence of Water

Елецкий¹,

Sosnin²,

Zaikina³

et al. 2017

J. Sib. Fed. Univ. Chem.

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High temperature reactions of water with heavy oil and bitumen: Insights into aquathermolysis chemistry during steam-assisted recovery

Cited by 43 publications

References 17 publications

Minimising hydrogen sulphide generation during steam assisted production of heavy oil

Minimising hydrogen sulphide generation during steam assisted production of heavy oil

Interfacial Chemistry in Steam-Based Thermal Recovery of Oil Sands Bitumen with Emphasis on Steam-Assisted Gravity Drainage and the Role of Chemical Additives

Heavy Oil Upgrading in the Presence of Water

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