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.

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.

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.

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.

Optimisation of Steam Assisted Gravity Drainage [SAGD] for Improved Recovery from Unconsolidated Heavy Oil Reservoirs

2011 ◽  
Vol 367 ◽  
pp. 403-412 ◽  
Author(s):  
Babs Mufutau Oyeneyin ◽  
Amol Bali ◽  
Ebenezer Adom
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Oil Industry ◽  
Steam Injection ◽  
Thermal Capacity ◽  
Thermal Recovery ◽  
Viscosity Reduction ◽  
Gravity Drainage ◽  
Steam Assisted Gravity Drainage ◽  
The Impact

Most of the heavy oil resources in the world are in sandstone reservoir rocks, the majority of which are unconsolidated sands which presents unique challenges for effective sand management. Because they are viscous and have less mobility, then appropriate recovery mechanisms that lower the viscosity to the point where it can readily flow into the wellbore and to the surface are required. There are many cold and thermal recovery methods assisted by gravity drainage being employed by the oil industry. These are customised for specific reservoir characteristics with associated sand production and management problems. Steam Assisted Gravity Drainage (SAGD) based on horizontal wells and gravity drainage, is becoming very popular in the heavy oil industry as a thermal viscosity reduction technique. SAGD has the potential to generate a heavy oil recovery factor of up to 65% but there are challenges to ‘’realising the limit’’. The process requires elaborate planning and is influenced by a combination of factors. This paper presents unique models being developed to address the issue of multiphase steam-condensed water-heavy oil modelling. It addresses the effects of transient issues such as the changing pore size distribution due to compaction on the bulk and shear viscosities of the non-Newtonian heavy oil and the impact on the reservoir productivity, thermal capacity of the heavy oil, toe-to-heel steam injection rate and quality for horizontal well applications. Specific case studies are presented to illustrate how the models can be used for detailed risk assessment for SAGD design and real-time process optimisation necessary to maximise production at minimum drawdown. Nomenclature

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.

MG-Solid Gas Source Heavy Oil Thermal Recovery Technology

2013 ◽  
Vol 868 ◽  
pp. 477-480
Author(s):  
Zhan Shuang Xu
Keyword(s):  
Heavy Oil ◽  
Thermal Recovery ◽  
Viscosity Reduction ◽  
Mixed Gas ◽  
Oil Viscosity ◽  
Gas Source ◽  
Profile Control ◽  
Better Than

MG-solid gas source is mainly composed of PH (phenols) and NI (nitrate) two kinds of solid components, in the presence of catalyst, which will start to react and produce CO2, N2 and RNH2(R: methyl or H) mixed gas at 50°C ~ 380°C (adjustable) called MG for short. Its profile control, heavy oil viscosity reduction and cleanup functions can be widely used in heavy oil thermal recovery, better than the N2 gas.

The Experimental Analysis of the Role of Flue Gas Injection for Horizontal Well Steam Flooding

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Zhanxi Pang ◽  
Peng Qi ◽  
Fengyi Zhang ◽  
Taotao Ge ◽  
Huiqing Liu
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Flue Gas ◽  
Three Dimensional ◽  
Steam Injection ◽  
Displacement Efficiency ◽  
Oil Viscosity ◽  
Sweep Efficiency ◽  
Steam Flooding ◽  
Heavy Oil Reservoirs

Heavy oil is an important hydrocarbon resource that plays a great role in petroleum supply for the world. Co-injection of steam and flue gas can be used to develop deep heavy oil reservoirs. In this paper, a series of gas dissolution experiments were implemented to analyze the properties variation of heavy oil. Then, sand-pack flooding experiments were carried out to optimize injection temperature and injection volume of this mixture. Finally, three-dimensional (3D) flooding experiments were completed to analyze the sweep efficiency and the oil recovery factor of flue gas + steam flooding. The role in enhanced oil recovery (EOR) mechanisms was summarized according to the experimental results. The results show that the dissolution of flue gas in heavy oil can largely reduce oil viscosity and its displacement efficiency is obviously higher than conventional steam injection. Flue gas gradually gathers at the top to displace remaining oil and to decrease heat loss of the reservoir top. The ultimate recovery is 49.49% that is 7.95% higher than steam flooding.

Indoor Study of Viscosity Reducer for Thickened Oil of Huancai

2012 ◽  
Vol 268-270 ◽  
pp. 547-550
Author(s):  
Qing Wang Liu ◽  
Xin Wang ◽  
Zhen Zhong Fan ◽  
Jiao Wang ◽  
Rui Gao ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Oil Recovery ◽  
Heavy Oil ◽  
High Viscosity ◽  
Oil Field ◽  
Viscosity Reduction ◽  
Oil Viscosity ◽  
Low Viscosity ◽  
Viscosity Reducer ◽  
Oil Water

Liaohe oil field block 58 for Huancai, the efficiency of production of thickened oil is low, and the efficiency of displacement is worse, likely to cause other issues. Researching and developing an type of Heavy Oil Viscosity Reducer for exploiting. The high viscosity of W/O emulsion changed into low viscosity O/W emulsion to facilitate recovery, enhanced oil recovery. Through the experiment determine the viscosity properties of Heavy Oil Viscosity Reducer. The oil/water interfacial tension is lower than 0.0031mN•m-1, salt-resisting is good. The efficiency of viscosity reduction is higher than 90%, and also good at 180°C.

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