This paper summarizes an investigation of certain operating parameters on the viscosity of petroleum emulsions. The production of crude oil is accompanied by emulsified water production, which comes along with various challenges like corroding the…
The challenges associated with heavy crude oil emulsions during hydrocarbon exploitation cannot be overemphasized. As such, water/crude oil separation in oil fields becomes necessary before conveyance to the refinery. In this study, we investigated…
Directional self-transportation of tiny droplets is significant in many fields. However, almost all existing studies focus on the phenomenon in air, and to realize similar performance in complex environments, such as oil, is still extremely rare.…
The application of microfibrillated cellulose and sodium dodecyl sulfate (SDS) to obtain heavy crude oil emulsions in water has been considered. First of all, the optimal concentration of cellulose in its aqueous dispersion was studied. A rheological…
The objective of this work is to study the effect of emulsion formation on steel corrosion in a sweet environment in a laboratory scale. Field experience shows that improper sizing of pipelines in the petroleum industry is often caused by a lack of…
Water and crude oil emulsions can be produced during oilfield operations. Since most oilfields are in the secondary or tertiary recovery stages, the amount of produced water is not negligible. Furthermore, enhanced oil recovery makes use of…
The oil industry consists of a great diversity of stages such as the extraction, storage, transportation, and processing of crude oil. In particular, oil storage turns out to be an area of interest for research because this specific stage is…
Effectively breaking an emulsion is very important in the petroleum industry since the produced crude oil is accompanied by water, which is linked to emulsions and can cause various environmental issues. To resolve these issues, surfactants are…
The gelation of emulsions is a notorious problem during the transportation of crude oil. In this study, the impact of dispersed water on the paraffin crystallization behavior in waxy crude oil was investigated using the mesoscopic dissipative…
Emulsions are common in the oil industry, being present in the extraction and production stages. Its formation occurs with the contact of brine and crude oil under intense flow. The presence of emulsified water (dispersed droplet size, φ ≤ 50 μm) in…
When oilfield development enters the middle and late stages, the crude oil–water mixture (COWM) produced from oil wells often has a high water cut and cannot form a stable emulsion. The traditional viscosity model of an emulsion is not suitable for…
Fluidizing highly converted hydrate particles is a potential way for continuously producing gas hydrate in gas storage application. However, the fundamental problem is to prevent hydrate agglomeration while keeping a high formation rate. In this…
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…
The formation of low-viscosity emulsions is a vital method for viscosity reduction of crude oil. Naphthenic acids, which are present in crude oil, are potential surface-active substances. Tertiary amines with CO2 response can be self-assembled in…
Crude oil transportation has been increasingly important for chemical industry, and to enhance the flowability of crude oil, various surfactants and amphipathic polymers have been utilized to form oil-in-water emulsions. As an alternative to…
The self-preservation phenomenon may be used for storage and transportation of natural gas in the form of gas hydrate. In this work, decomposition kinetics and self-preservation of methane hydrate dispersions in two types of crude oils were studied.…
In CO2 flooding, the dissolution of CO2 in produced fluid may change the stability of crude oil emulsion, thereby affecting the design/operation of the gathering pipeline and oil-water separation. The purpose of this study is to investigate the…
Wax diffusion characteristics are of great importance to the wax deposition prediction in crude oil pipelines. The wax diffusion process of water in oil emulsion (w/o emulsion) is more complicated on account of the influence from dispersed water…
This article thoroughly evaluates the performance of a synthesized surfactant as an emulsifier for the preparation of an Indian heavy crude oil-in-water (o/w) emulsion to enhance its ability to flow through offshore pipelines. The physico-chemical…
Water cut crude oil needs to be deeply dehydrated before further transportation or refining because water residuals not only tremendously increase the transportation cost and energy consumption, but also harm the oil delivery pipelines and refining…
Although the problem of wax deposition in multiphase transportation pipelines have been addressed and some related wax deposition models have been developed in recent years, the complex wax deposition paths derived from the potential variety of flow…
The development of petroleum extraction and transport technology does not ensure complete isolation of these substances from the natural environment. This problem is exacerbated by the location of mining equipment on the sea shelf and the fact that…
The need for efficient demulsification process to treat emulsions in the petroleum industry is well acknowledged. For decades, numerous researches have been conducted to examine mechanisms of emulsification and demulsification. Untreated emulsion has…
Water (W) and oil (O) normally mix during production and while passing through valves and pumps to form a persistent water-in-oil (W/O) emulsion, which is a serious restriction in oil production and transporting and refining processes. The objective…
Emulsified water droplets must be extracted from crude oil for economical and transport purposes, which is achievable by chemical demulsification. Four different chemicals were tested on water-in-crude oil emulsions using a newly developed nuclear…
Formation of water/oil emulsions is a frequent and challenging problem to deal with during crude oil extraction and processing. Crude oil must have water contents (BS&W) below 0,5% to meet transport and export requirements. Lowering BS&W values in…
• Sonochemical technique has the best effect for crude oil demulsification/dehydration. • The influence factor for sonochemical demulsification/dehydration is investigated. • Recent progress on ultrasonic demulsification equipment is introduced.…
Emulsions of water-in-oil (W/O) is a very common occurrence in the oil and gas industries. The viscosity and rheological properties of the emulsions are of great interest to the petroleum industry, especially during oil exploitation and…
A commercially available anti-agglomerant (AA) was evaluated in water-in-crude oil (W/CO) emulsions at different water cut. The injection of an AA to an emulsion affects the induction time and rate of hydrate formation. When AA was injected before…
Crude oil is normally produced in the form of a water-in-oil (W/O) emulsion. One of the major challenges during crude oil exploration is the high viscosity of crude oil produced due to the formation of stable emulsions. This affects the overall cost…
The viscoelastic characteristics of unstable heavy crude-oil-water dispersed mixtures are investigated to improve pipeline transportation. The effects of temperature, dispersed phase volume fraction, and droplet size distribution are considered on…
Separating produced water is a key part of production processing for most crude oils. It is required for quality reasons, and to avoid unnecessary transportation costs and prevent pipework corrosion rates caused by soluble salts present in the water.…
The emulsification of heavy crude oil is the most economical way to transport it through offshore pipelines. In this research article, distinct oil-in-water (o/w) emulsions were developed from an Indian heavy crude oil using…
Dry fractionation has shown to be a promising method to obtain less refined protein ingredients from legumes with novel technofunctionalities compared to solvent extracted protein isolates. However, the relationship between composition and…
To develop more cost-effective and environmentally friendly strategies to prevent the formation of gas hydrate plugs in oil production pipelines, a better understanding of the mechanisms of plug formation is needed. This paper presents broad-band…
Ice crystallization in confined spherical geometries is investigated experimentally at ambient pressure conditions. Water-in-crude (w/o) oil emulsions are formed by homogenization of an acidic North Sea crude oil with water or brine, at aqueous phase…
The crude oil is in most cases accompanied with water and natural gas. For this reason, it is important to understand the rheology of the oil emulsion. There are already many works relating to rheology of the oil/water emulsion. However, studies on…
Amphiphilic poly(ionic liquids), PILs, derived from natural products attracted great attention as a green chemical in the field of the surface chemistry and petroleum industry. In the present work, new surface active PILs were synthesized from…
A new series of sulfobetaine surfactants with double-chain single-head structure were derived from 1,3-dialkyl glyceryl ethers and their performances in reducing Daqing crude oil/connate water interfacial tension (IFT) in the absence of alkali were…
Some crude oils contain naturally occurring surfactants that avoid hydrate agglomeration. Natural hydrate anti-agglomeration has been linked to different crude oil fractions, including asphaltenes and petroleum acids. Asphaltenes are known to promote…
It is generally accepted that asphaltenes are the main stabilizing agents of water-in-crude-oil emulsions. However, the phenomenon of formation and stabilization of the colloid is complex and requires further studies. In this work, interfacially…
To investigate the influence of microbial wax removal and viscosity reduction technologies on the fluidity of waxy crude oil, this study took the waxy crude oil from China's Daqing Oilfield as the experimental object for microbial wax removal and…
This study examines the time evolution and effects of adding dispersant (Corexit 9500A) at varying concentrations on the microscopic morphology and bulk viscosity of saltwater-in-crude-oil (Louisiana) mechanically mixed emulsions. Rheology is used…
Water-in-oil emulsion is a newly emerging hydration enhancement material in recent years. It has good hydration and gas storage potential. However, in order to ensure the stability of emulsion, the water content of the water-in-oil emulsion usually…
In order to investigate the effect of different nonionic surfactants on hydrate formation in oil-water emulsion systems, the hydrate formation experiments were carried out in a diesel water-in-oil emulsion system with a water cut of 40% using…
The yield behavior of water-in-oil (W/O) waxy crude oil emulsion cementitious system was studied experimentally under two loading modes of constant and linear increase shear stress. Based on the yield strain and shear rate of the crude oil emulsion…
The emulsification characteristic of crude oil-water system is greatly related to the physical properties of the crude oil. The emulsified water volume fraction under flowing conditions was used to characterize the emulsification characteristic of…