Hydrogen Donor Catalytic Aquathermolysis Upgrading for Heavy Oil: A Laboratory Study

2011 ◽  
Vol 480-481 ◽  
pp. 142-147 ◽  
Author(s):  
Fa Jun Zhao ◽  
Yong Jian Liu ◽  
Bo Zhang ◽  
Long Dong ◽  
Hai Tao Yu
Keyword(s):  
Formic Acid ◽  
Heavy Oil ◽  
Thermal Recovery ◽  
Hydrogen Donor ◽  
Viscosity Reduction ◽  
Nickel Salt ◽  
Oil Viscosity ◽  
Catalytic Aquathermolysis ◽  
Before And After

Heavy oil pyrolysis reaction was studied with formic acid as a body for hydrogen donor and homemade of oil-soluble organic nickel salt as a catalyst, by high-temperature and high-pressure Reactor simulating Thermal Recovery conditions. Explore the influence of the addition of hydrogen donor on heavy oil viscosity, group composition and sulfur contents before and after the catalytic aquathermolysis reaction. The results show that catalytic aquathermolysis of heavy oil leads to a percentage viscosity reduction of 64.69%, to an increase in saturates and aromatics contents from 24.32% and 36.89% to 26.12% and 38.08%, and to a decrease in resins, asphaltenes, and sulfur contents from 30.27%, 8.52%, and 0.5650% to 28.27%, 7.53%, and 0.3365%,respectively; when formic acid is introduced at dosage of 1-7% heavy oil mass, the percentage viscosity reductio is continuously raised to 69.16-87.02%, the saturates and aromatics contents-increased to 27.73-31.12% and 39.68-41.26% and the resins, asphaltenes, and sulfur contents-decreased to 26.29-24.12%, 6.66-3.50%, and 0.3095-0.0742%, respectively. The role of hydrogen donor formic acid and the functioning mechanisms involved in catalytic aquathermolysis of heavy oil are discussed.

Additives on Hydrogen Donor Catalytic Upgrading for Viscosity Reduction of Heavy Oil under the Conditions of Steam Injection

2011 ◽  
Vol 55-57 ◽  
pp. 57-62 ◽  
Author(s):  
Fa Jun Zhao ◽  
Yong Jian Liu ◽  
Bo Zhang ◽  
Si Ha ◽  
Shi Ping Li
Keyword(s):  
Heavy Oil ◽  
Steam Injection ◽  
Reduction Reaction ◽  
Thermal Recovery ◽  
Hydrogen Donor ◽  
Viscosity Reduction ◽  
Nickel Salt ◽  
Oil Viscosity ◽  
Ammonium Hydrocarbonate ◽  
Group Compositions

Under the simulated thermal recovery condition, fundamental experiments were carried out in the high temperature high pressure reactor to study the aquathermolysis reaction of heavy oil using formic acid as hydrogen donor and oil-soluble organic home-made nickel salt as catalytic. Urea was selected optimally from the alternative chemical addictivess of ammonium carbonate, urea and ammonium hydrocarbonate and its dosage was 20wt%. The affect of the adding addictives in water for viscosity, group composition and element content of heavy oil during the hydrogen donor catalytic pyrolysis reaction, was researched. It was revealed that there mechanism in the heavy oil viscosity reduction reaction process. The addition of addictives had not only some degree of viscosity reduction function, but also synergistic interaction to the catalyzed reaction with hydrogen donor. Compared to the oil sample from reaction without addictives, there was no obvious change on group compositions, the contents of atom C, H, S, N and O nearly kept unchanged. the introduction of addictives basically did not change structure of heavy oil.

Thermal and Structural Analysis of Asphaltine in Heavy Oil before and after the Hydrogen Donor Catalytic Reaction of Upgrading and Viscosity Reduction under the Effect of Auxiliary Agents

2011 ◽  
Vol 55-57 ◽  
pp. 918-923 ◽  
Author(s):  
Fa Jun Zhao ◽  
Yong Jian Liu ◽  
Xian You Qi ◽  
He Wang ◽  
Jie Zhao
Keyword(s):  
Structural Analysis ◽  
Heavy Oil ◽  
Structural Changes ◽  
Thermal Transformation ◽  
Thermal Recovery ◽  
Hydrogen Donor ◽  
Viscosity Reduction ◽  
Nickel Salt ◽  
Before And After ◽  
Body Self

This paper applies high-pressure reactor to simulate conditions of thermal recovery and uses formic acid as hydrogen donor body, self-made oil-soluble organic nickel salt as catalyst and urea as auxiliary agents to conduct the study on of heavy oil. By TG-DTA, IR and NMR spectra, it makes an analysis on thermal transformation behavior and structural changes of asphaltine in heavy oil before and after the reaction of upgrading and viscosity reduction under the effect of auxiliary agents. The results show that the stability of the asphaltine in heavy oil after aquathermolysis reaction of hydrogen donor catalyzing is decreased. Infrared spectroscopy analysis reveals that the absorption peaks of IR functional groups of asphaltine in heavy oil is unchanged and the addition of auxiliary agents basically does not change the structure of asphaltine. NMR structural analysis shows that.

Upgrading Heavy Oil by Catalytic Aquathermolysis Using Formic Acid as Hydrogen Donor

2011 ◽  
Vol 236-238 ◽  
pp. 844-849 ◽  
Author(s):  
Jie Zhao ◽  
Yong Jian Liu ◽  
Qiu Yue Chen
Keyword(s):  
Formic Acid ◽  
Naphthenic Acid ◽  
Nickel Sulfate ◽  
Initial Pressure ◽  
Hydrogen Donor ◽  
Viscosity Reduction ◽  
Temperature Sensitive ◽  
Aromatic Rings ◽  
Catalytic Aquathermolysis

The aquathermolysis (AqTh) of Liaohe heavy crude oil (HCO) in a 300ml autoclave is investigated with an oil soluble catalyst and formic acid as hydrogen donor at 280°C for 24h in N2 atmosphere，with initial pressure 8.1 MPa. The catalyst is a green viscous liquid of nD=1.4737 and made from naphthenic acid and nickel sulfate. The viscosity of HCO is temperature sensitive, being of 3716 mPa·s at 50°C and shear rate 44.1 s-1.The plain catalytic AqTh of HCO leads to a percentage viscosity reduction(PVR) of 64.69%，to an increase in saturates and aromatics contents from 24.32% and 36.89% to 26.12% and 38.08%, and to a decrease in resins, asphaltenes, and sulfur contents from 30.27%，8.52%, and 0.5650% to 28.27%,7.53%,and 0.3365%, respectively; when formic acid is introduced at dosage of 1~7% HCO mass, the PVR is continuously raised to 69.16~87.02%, the saturates and aromatics contents increased to 27.73~31.12% and 39.68~41.26% and the resins, asphaltenes, and sulfur contents decreased to 26.29~24.12%, 6.66~3.50% and 0.3095~0.0742%,respectively. The IR-spectrometry shows that decarboxylation is conducted and number of aromatic rings is lessened in hydrogen donor catalytic AqTh. The role of formic acid and the functioning mechanisms involved inatalytic AqTh of HCO are discussed.

The Researches on Upgrading of Heavy Crude Oil by Catalytic Aquathermolysis Treatment Using a New Oil-Soluble Catalyst

2012 ◽  
Vol 608-609 ◽  
pp. 1428-1432 ◽  
Author(s):  
Wen Long Qin ◽  
Zeng Li Xiao
Keyword(s):  
Heavy Oil ◽  
Saturated Hydrocarbon ◽  
New Technology ◽  
Viscosity Reduction ◽  
Catalytic Aquathermolysis ◽  
Composition And Structure ◽  
Before And After ◽  
Heavy Crude

The aquathermolysis of Shengli heavy oil during steam stimulation was studied by using a new oil-soluble catalyst for the reaction in this paper. The laboratory experiment shows that the viscosity reduction ratio of heavy oil is over 75% at the circumstances of 200°C, 24 hs, 0.3 % catalyst solution. The viscosity of upgraded heavy oil is changed from 25306mPa•s to 6175mPa•s at 50°C. The chemical and physical properties of heavy oil both before and after reaction were studied by using column chromatography (CC) analysis and elemental analysis (EL). The percentage of saturated hydrocarbon、aromatic hydrocarbon and H/C increased, and resin、asphalt and the amount of element of S,O and N decreased after the aquathermolysis. The changes of the composition and structure of the heavy oil can lead to the viscosity reduction and the improvement the quality of heavy oil. The results are very useful for the popularization and application of the new technology for the in situ upgrading of heavy oil by aquathermolysis.

scholarly journals Experimental study on the mechanism and development effect of multi-gas assisted steam huff and puff process in the offshore heavy oil reservoirs

2021 ◽  
Author(s):  
Jie Fan ◽  
Zuqing He ◽  
Wei Pang ◽  
Daoming Fu ◽  
Hanxiu Peng ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Steam Injection ◽  
Thermal Recovery ◽  
Oil Reservoirs ◽  
Viscosity Reduction ◽  
Oil Viscosity ◽  
Enhanced Production ◽  
Heavy Oil Reservoirs ◽  
Water Gas ◽  
Development Mechanism

AbstractMulti-gas assisted steam huff and puff process is a relatively new thermal recovery technology for offshore heavy oil reservoirs. Some blocks of Bohai oilfield have implemented multi-gas assisted steam huff and puff process. However, the development mechanism still requires further study. In this paper, high-temperature high-pressure (HTHP) PVT experiments and different huff and puff experiments of sand pack were carried out to reveal the enhanced production mechanism and evaluate the development effect of multi-gas assisted steam huff and puff process. The results indicated that viscosity reduction and thermal expansion still were the main development mechanism of multi-gas assisted steam huff and puff process. Specifically, CO2 easily dissolved in the heavy oil that made it mainly play the role of reducing oil viscosity, N2 was characteristics of small solubility and good expansibility, and it could improve formation pressure, increase steam sweep volume and even reduce the heat loss. Meanwhile, injecting multi-gas and steam could break the balance of heavy oil component that made the content of resin reduce and the content of saturates, aromatics and asphaltene increase so as to further reduce the viscosity of heavy oil. Compared with steam huff and puff process, multi-gas assisted steam huff and puff process increased the recovery by 2–5%. The optimal water–gas ratio and steam injection temperature were 4:6 and 300℃, respectively. The results suggested that multi-gas assisted steam huff and puff process would have wide application prospect for offshore heavy oil reservoirs.

scholarly journals Reduction of heavy oil viscosity through ultrasound cavitation assisted by NiO nanocrystals-functionalized SiO2 nanoparticles

DYNA ◽  
2018 ◽  
Vol 85 (207) ◽  
pp. 153-160 ◽  
Author(s):  
Daniel Montes ◽  
Farid B. Cortés ◽  
Camilo A Franco
Keyword(s):  
Heavy Oil ◽  
Metal Oxide Nanoparticles ◽  
Catalytic Decomposition ◽  
Sio2 Nanoparticles ◽  
Viscosity Reduction ◽  
Oil Viscosity ◽  
Asphaltene Content ◽  
Before And After ◽  
Heavy Fractions ◽  
Nio Nanocrystals

The objective of this study is to reduce heavy oil viscosity through the catalytic decomposition of heavy fractions by ultrasound cavitation using metal oxide nanoparticles and water as a hydrogen donor, leading to the reduction of asphaltene content through its conversion into lighter components. NiO nanoparticles were synthesized over a 7 nm silica support using the incipient wetness technique. Emulsified heavy oil (HO) with 40%v/v of water and 13°API was used to evaluate the ultrasound cavitation process over different exposure times and nanoparticle dosages. The viscosity of the emulsified HO before and after ultrasound cavitation was measured with and without nanoparticles. Significant viscosity reduction was obtained, showing best results at 90 minutes of ultrasound exposure time with a nanoparticle dosage of 2000 mg/L, leading to a viscosity reduction at 10 s-1 and 25°C, and an asphaltene content reduction of 44 and 16%, respectively.

Understanding the role of iron (III) tosylate on heavy oil viscosity reduction

Fuel ◽  
2020 ◽  
Vol 274 ◽  
pp. 117808 ◽  
Author(s):  
Yan Xu ◽  
Ciceron Ayala-Orozco ◽  
Pinn-Tsong Chiang ◽  
Michael Shammai ◽  
Michael S. Wong
Keyword(s):  
Heavy Oil ◽  
Viscosity Reduction ◽  
Oil Viscosity

scholarly journals Enhancement of Heavy Oil Recovery by Nanoparticle/Microwave Application

2019 ◽  
pp. 51 ◽  
Author(s):  
P. Pourafshary ◽  
H. Al Farsi
Keyword(s):  
Porous Media ◽  
Microwave Radiation ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Thermal Recovery ◽  
Viscosity Reduction ◽  
Heavy Oil Recovery ◽  
Oil Viscosity ◽  
Steam Flooding ◽  
Recovery Methods

The primary heavy oil recovery is low due to the high viscosity and low mobility; hence, conventional thermal enhanced oil recovery methods such as steam flooding are widely applied to increase the oil production. New unconventional method such as microwave assisted gravity drainage (MWAGD) is under study the change the viscosity of the oil by microwave radiation. Different challenges such as heat loss and low efficiency are faced in unconventional thermal recovery methods especially in deep reservoirs. To improve the performance of unconventional methods, nanotechnology can play an important role. Nanomaterials due to their high surface to volume ratio, more heat absorbance, and more conductivity can be used in a novel approach called nanomaterial/microwave thermal oil recovery. In this work, several nanofluids prepared from nanoparticles such as γ-Alumina (γ-Al2O3), Titanium (IV) oxide (TiO2), MgO, and Fe3O4 were used to enhance the oil viscosity reduction in the porous media under MWAGD mechanism. Our tests showed that adding nanoparticles can increase the absorption of microwave radiation in the oil/ water system in the porous media. The magnitude of this increase is related to the type, particle size distribution in base fluid and, concentration of nanoparticles. Aluminum oxide nanoparticle was found to have the greatest effect on thermal properties of water. For example, only 0.05 wt.% of this nanoparticle, improves the alteration in temperature of water for around 100%. This change can affect the oil recovery and changed it from 37% to more than 40% under MWAGD. Hence, our experiments showed that besides other applications of nanotechnology in enhance oil recovery, heavy oil recovery can also be affected by nanomaterials.

Research on the Asphaltene Structure and Thermal Analysis in Catalytic Aquathermolysis of Heavy Oil

2011 ◽  
Vol 474-476 ◽  
pp. 893-897 ◽  
Author(s):  
Fa Jun Zhao ◽  
Yong Jian Liu ◽  
Yi Wu ◽  
Yong Si ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Heavy Oil ◽  
High Viscosity ◽  
Viscosity Reduction ◽  
Component Structure ◽  
Catalytic Aquathermolysis ◽  
Lower Viscosity ◽  
Before And After ◽  
Light Components ◽  
Asphaltene Structure

As an irreversible viscosity reduction way, catalytic aquathermolysis of heavy oil is given close attention by scholars at home and abroad, and a high content of asphaltene in heavy oil is the major cause for the high viscosity of heavy oil. Through the use of IR spectrum and TG-DTA, this paper analyzes the asphaltene structure and thermal analysis before and after the catalytic aquathermolysis reaction, and the result shows some changes in the heavy component structure in the asphaltene after the reaction, a reduction in some unsaturated structures, an increase in saturated structures, a reduction in long-chain structures, an increase in short-chain structures, and an increase in light components. Thermal analysis shows that part of the asphaltenes can be converted into alkane soluble substance. The catalyst acts on the heteroatoms in asphaltenes, which partly changes the asphaltene structure and makes it cracked to some extent, so as to lead to the lower viscosity of heavy oil.

scholarly journals In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

Processes ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 127
Author(s):  
Firdavs A. Aliev ◽  
Irek I. Mukhamatdinov ◽  
Sergey A. Sitnov ◽  
Mayya R. Ziganshina ◽  
Yaroslav V. Onishchenko ◽  
...  
Keyword(s):  
Metal Ions ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Synergetic Effect ◽  
Field Tests ◽  
Water Soluble ◽  
Viscosity Reduction ◽  
Oil Viscosity ◽  
Catalytic Aquathermolysis

The aquathermolysis process is widely considered to be one of the most promising approaches of in-situ upgrading of heavy oil. It is well known that introduction of metal ions speeds up the aquathermolysis reactions. There are several types of catalysts such as dispersed (heterogeneous), water-soluble and oil soluble catalysts, among which oil-soluble catalysts are attracting considerable interest in terms of efficiency and industrial scale implementation. However, the rock minerals of reservoir rocks behave like catalysts; their influence is small in contrast to the introduced metal ions. It is believed that catalytic the aquathermolysis process initiates with the destruction of C-S bonds, which are very heat-sensitive and behave like a trigger for the following reactions such as ring opening, hydrogenation, reforming, water–gas shift and desulfurization reactions. Hence, the asphaltenes are hydrocracked and the viscosity of heavy oil is reduced significantly. Application of different hydrogen donors in combination with catalysts (catalytic complexes) provides a synergetic effect on viscosity reduction. The use of catalytic complexes in pilot and field tests showed the heavy oil viscosity reduction, increase in the content of light hydrocarbons and decrease in heavy fractions, as well as sulfur content. Hence, the catalytic aquathermolysis process as a distinct process can be applied as a successful method to enhance oil recovery. The objective of this study is to review all previously published lab scale and pilot experimental data, various reaction schemes and field observations on the in-situ catalytic aquathermolysis process.

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