Dispersion of asphaltene in crude oil using ionic liquids (ILs) is being considered as a viable solution, in extraction and transportation processes. In this work, the interplay between asphaltene and ILs has been studied systematically to understand…
CO2 flooding is now widely used as an enhanced oil recovery (EOR) technology and is also one of the most valuable CCUS processes. The interface characteristics of CO2 with crude oil and the rock matrix dynamically change during CO2 flooding. In this…
Heavy oil reservoirs contain a large amount of hydrocarbons that are relatively difficult to produce and lift to the surface due to the very low mobility of these heavy oils. Even after producing these heavy oils, transportation problems arise as…
The development of concentrated and highly stable oil-in-water (O/W) emulsion is considered to be a cost-effective alternative for the transportation of produced heavy crude oils. However, the demulsification of a transported O/W emulsion is…
CO2 flooding has been recognized as one of the major alternatives for CO2 emission reduction and as well as increasing in the recovery from the oil reservoirs. However, CO2 is scrutinized for its potential low efficiency for oil recovery coupled with…
It is shown that associated petroleum gas (APG) and the product of intrastratal transformation of air (by high-pressure air injection technology) are suitable for oil displacement from low-permeability, high-temperature light oil reservoirs. It was…
In this paper, advanced oxidation process (AOP) combining ultrasound (US) and Fenton's process was proposed for the treatment of total petroleum hydrocarbons present in oil spill sludge. The effect of several parameters like pH, ultrasonic power,…
A recently developed extrography separation method fractionates petroleum asphaltenes based on their ionization efficiency, which correlates with polarity, aggregation tendency, and asphaltene structure (single-core or island versus multicore or…
When CO2 is injected into hydrocarbon reservoirs for enhanced oil recovery (EOR), the minimum miscibility pressure (MMP), which defines as the lowest pressure of generating a miscible phase, is an important parameter to determine whether the…
In this paper, phase behavior in temperature scanning of E1305/distillate fractions/water/n-butyl alcohol microemulsion system were investigated. And the effect of surfactant concentration and oil type on microemulsion solubilization ability was…
Minimum miscibility pressure (MMP) is a key variable for monitoring miscibility between reservoir fluid and injection gas. Experimental and non-experimental methods are used to estimate MMP. Available miscibility correlations attempt to predict the…
Heavy oil reserves in the world represent 5.5 trillion barrels, which are equivalent to five times the conventional crude oil reserves. Heavy oil reserves will be the main petroleum source for the world's future demand for energy. To enhance the…
Asphaltenes are being a proxy of kerogen in the reservoir oil, which they have structural similarity. This characteristic provides an invaluable tool for obtaining oil fingerprints from the structural composition of asphaltenes. Since these compounds…
The Vanishing Interfacial Tension (VIT) technique is used to determine the Minimum Miscibility Pressure (MMP) of 5 dead crude oil samples using pure Nitrogen as injected gas. This technique is used to measure the Interfacial Tension for each oil…
This study proposes economic evaluation of CO2 geological storage with enhanced oil recovery. The procedures consider capital expenditures and operating costs of infrastructures and revenues from oil recovery and carbon tax credits. Extensive CO2…
The ability of an injected gas to dissolve crude oil hydrocarbons may be a major factor controlling the success of enhanced oil recovery (EOR) projects in unconventional reservoirs. Multiple laboratory gas injection tests were conducted using Bakken…
Based on the mechanisms of gravity displacement, miscibility, viscosity reduction, and imbibition in natural gas flooding, an integrated reservoir construction technology of oil displacement and underground gas storage (UGS) is proposed. This paper…
This study develops an integrative simulation model of a water alternating gas (WAG) process that co-injects carbon dioxide (CO2) and methane (CH4)–CO2–CH4 WAG—for formation damage caused by asphaltene deposition in an oil reservoir. The influences…
Improved oil recovery from tight oil reservoirs to fulfill the fossil fuel requirements and the CO2 storage to meet the net carbon zero objectives are the two motivations of this work. CO2 is a major anthropogenic greenhouse gas and its emission to…
Carbon dioxide (CO2) sequestration for sustainable enhanced oil recovery and reducing greenhouse gas emissions, still faces various challenges. The process performance can improve via injection of nanoparticles into CO2 (NPs-CO2). However, the…
To investigate the mechanism of local porosity modification in a carbonate reservoir caused by the acidic components associated with natural gas generation, a numerical model for the charging of natural gas rich in acidic components (CO2) was…
Without remorse, fossil fuels have made a huge contribution to global development in all of its forms. However, the recent scientific outlooks are currently shifting as more research is targeted towards promoting a carbon-free economy in addition to…
A heavy oil sample from Dagang Oilfield was used to study the EOR mechanisms of CO2 huff and puff process using a PVT device and a sand-pack displacement set-up. The properties and interactions of the CO2-crude oil system were measured under high…
Minimum miscibility pressures (MMPs) were measured at reservoir temperatures using a capillary-rise vanishing interfacial tension (VIT) technique for four crude oils collected from different formations in the deep/hot Bakken Petroleum System and the…
Saturated vapor pressure of elemental mercury (Hg) and Hg solubility in compressed gaseous methane, ethane, and carbon dioxide were investigated. The apparatus designed for this study was based on a flow method and equipped with a cold vapor atomic…
In this work, a mixed absorbent of an ionic liquid (IL) and triethylene glycol (TEG) is first proposed for natural gas (NG) dehydration. The hydrophilic [EMIM][BF4] is selected as an appropriate IL composition from 240 potential candidates by…
Low oil recovery factors and rapid decline rates are key challenges in developing shale and tight oil formations. Despite encouraging gas Huff-n-Puff (HnP) field pilot results, the oil-recovery mechanisms are still not well understood. This paper…
N2 or N2/CO2 mixture is considered as injection gas to enhance oil recovery from Tahe oil field. The reservoir pressure and temperature are around 66 MPa and 414 K. The target light crude oil is produced from S117 well of the Tahe oil field. The two…
Sugar alcohols, such as xylitol, sorbitol and inositols, are added-value carbohydrates with relevant bioactive and technological properties. These features make their extraction from natural sources of great interest both from the scientific and…
Asphaltenes represent the most polar solubility fraction of crude oil. The polar-polar interactions between asphaltene-water, asphaltene-clay, or asphaltene-asphaltene molecules can cause severe flow assurance issues in the oilfield such as formation…
In this work, a mixed absorbent of an ionic liquid (IL) and triethylene glycol (TEG) is first proposed for natural gas (NG) dehydration. The hydrophilic [EMIM][BF4] is selected as an appropriate IL composition from 240 potential candidates by…
Different from other gas drive processes, phase behavior performs more significant roles in natural gas drive process. The main reason is that more severe mass transfer effect and similar phase solubility effect have been caused by multicomponent…
In this study, the natural gas solubility in brine and its influence on natural gas reserve and production in a tight gas reservoir have been investigated by the integration of laboratory experiments, phase equilibrium calculations, and numerical…
Adaptability evaluation of reservoirs needs to be performed before natural gas flooding. However, the current evaluation methods consider the reservoir pressure and minimum miscible pressure (MMP) as separate parameters to evaluate the miscibility,…
Stability and compatibility can be described by the insolubility number (IN), the solubility blending number (SBN) and the ratio (R) between them, which has become a critical index in daily refineries operation. In this work, a new methodology for…
Gas huff-n-puff in unconventional reservoirs has been studied extensively in the past five years due to a large number of shale resources available and their dramatic production decline. With the increasing natural gas availability and its low price…
The primary mechanism of surfactant enhanced oil recovery (EOR) has always been ascribed to ultralow interfacial tension (IFT) between oil and dispalcing fluid by forming middle-phase microemulsion. However, it is found in field trials that oil can…
Heavy oil reservoirs contain a large amount of hydrocarbons that are relatively difficult to produce and lift to the surface due to the very low mobility of these heavy oils. Even after producing these heavy oils, transportation problems arise as…
Different from other gas drive processes, phase behavior performs more significant roles in natural gas drive process. The main reason is that more severe mass transfer effect and similar phase solubility effect have been caused by multicomponent…
Sour gas components (mostly H2S and CO2) are to be removed from natural gas in a sweetening process. Analysis of sweetening of natural gas has been carried out by formulating steady state and transient rate-based models which have been developed…
In this study, the natural gas solubility in brine and its influence on natural gas reserve and production in a tight gas reservoir have been investigated by the integration of laboratory experiments, phase equilibrium calculations, and numerical…
A clear understanding of multiphase flow with phase change is of great significance in productivity evaluation, process optimization, and production analysis, which is one of the focus issues of underbalanced drilling. In the process of underbalanced…
N2 or N2/CO2 mixture is considered as injection gas to enhance oil recovery from Tahe oil field. The reservoir pressure and temperature are around 66 MPa and 414 K. The target light crude oil is produced from S117 well of the Tahe oil field. The two…
The primary mechanism of surfactant enhanced oil recovery (EOR) has always been ascribed to ultralow interfacial tension (IFT) between oil and dispalcing fluid by forming middle-phase microemulsion. However, it is found in field trials that oil can…
This study develops an integrative simulation model of a water alternating gas (WAG) process that co-injects carbon dioxide (CO2) and methane (CH4)–CO2–CH4 WAG—for formation damage caused by asphaltene deposition in an oil reservoir. The influences…
In CO2 enhanced oil recovery process, the interactions between CO2 and oil components are complex since crude oil is a mixture of n-alkanes, cycloalkanes, aromatics, resin, asphaltene and other compounds. To investigate the effects of temperature,…
A clear understanding of multiphase flow with phase change is of great significance in productivity evaluation, process optimization, and production analysis, which is one of the focus issues of underbalanced drilling. In the process of underbalanced…
Gas huff-n-puff in unconventional reservoirs has been studied extensively in the past five years due to a large number of shale resources available and their dramatic production decline. With the increasing natural gas availability and its low price…
Gas huff-n-puff in unconventional reservoirs has been studied extensively in the past five years due to a large number of shale resources available and their dramatic production decline. With the increasing natural gas availability and its low price…
Asphaltenes represent the most polar solubility fraction of crude oil. The polar-polar interactions between asphaltene-water, asphaltene-clay, or asphaltene-asphaltene molecules can cause severe flow assurance issues in the oilfield such as formation…