Asphaltenes and Other Natural Surfactants from Cerro Negro Crude Oil. Stepwise Adsorption at the Water/Toluene Interface:  Film Formation and Hydrophobic Effects

2005 ◽  
Vol 19 (5) ◽  
pp. 1948-1953 ◽  
Author(s):  
Sócrates Acevedo ◽  
Belsay Borges ◽  
Felipe Quintero ◽  
Vincent Piscitelly ◽  
Luis B. Gutierrez
Keyword(s):  
Crude Oil ◽  
Film Formation ◽  
Hydrophobic Effects ◽  
Natural Surfactants ◽  
Cerro Negro

Multiphase Transportation: Hydrate Plugging Prevention Through Crude Oil Natural Surfactants

1998 ◽  
Author(s):  
E.M. Leporcher ◽  
J.L. Peytavy ◽  
Y. Mollier ◽  
J. Sjoblom ◽  
C. Labes-Carrier
Keyword(s):  
Crude Oil ◽  
Natural Surfactants

Emulsification of heavy crude oil in water by natural surfactants

2012 ◽  
Vol 86-87 ◽  
pp. 137-143 ◽  
Author(s):  
S.N. Ashrafizadeh ◽  
E. Motaee ◽  
V. Hoshyargar
Keyword(s):  
Crude Oil ◽  
Heavy Crude Oil ◽  
Oil In Water ◽  
Natural Surfactants ◽  
Heavy Crude

scholarly journals Technologies Involved in the Demulsification of Crude Oil

2021 ◽  
Author(s):  
Karthika Rajamanickam
Keyword(s):  
Crude Oil ◽  
Enhanced Recovery ◽  
Petroleum Industry ◽  
Petroleum Reservoirs ◽  
Basic Research ◽  
Stable Emulsion ◽  
Recovery Processes ◽  
Proper Formulation ◽  
Natural Surfactants ◽  
Fit For Purpose

Due to the use of enhanced recovery processes that necessitate the use of a considerable amount of water, mature petroleum reservoirs generate crude oil with huge amounts of water. The majority of this water gets emulsified into crude oil during production, increasing viscosity and making flow more difficult, resulting in production, transportation, and refining operational challenges that have an influence on corporate productivity. Natural surfactants with a strong potential to create stable emulsions are naturally mixed with crude oils. Because crudes with a high amount of stable emulsion have a lower value, the stable emulsion must be adequately processed to meet industrial requirements. As a result, basic research on natural surfactants that contribute to emulsion stability is examined in order to effectively separate emulsions into oil and water. This would need a review of various emulsification methods as well as the proper formulation for effective demulsification. The petroleum industry recognizes the importance of an efficient demulsification procedure for treating emulsions. Numerous studies on the mechanisms of emulsification and demulsification have been undertaken for decades. To guarantee optimal hydrocarbon output, effective treatment is required. The present paper is to review reported works on the formation of petroleum emulsions, demulsification treatments, and characteristics of fit-for-purpose demulsifiers as well as research trends in emulsion treatment.

scholarly journals The Oscillatory Spinning Drop Technique. An Innovative Method to Measure Dilational Interfacial Rheological Properties of Crude Oil-Brine Systems in the Presence of Asphaltenes

2021 ◽  
Vol 5 (3) ◽  
pp. 42
Author(s):  
Ronald Marquez ◽  
Johnny Bullon ◽  
Ana Forgiarini ◽  
Jean-Louis Salager
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Rheological Properties ◽  
Oil Recovery ◽  
Interfacial Rheology ◽  
Drop Method ◽  
Natural Surfactants ◽  
Low Interfacial Tension ◽  
Oil Water ◽  
Drop Technique

The oscillatory spinning drop method has been proven recently to be an accurate technique to measure dilational interfacial rheological properties. It is the only available equipment for measuring dilational moduli in low interfacial tension systems, as it is the case in applications dealing with surfactant-oil-water three-phase behavior like enhanced oil recovery, crude oil dehydration, or extreme microemulsion solubilization. Different systems can be studied, bubble-in-liquid, oil-in-water, microemulsion-in-water, oil-in-microemulsion, and systems with the presence of complex natural surfactants like asphaltene aggregates or particles. The technique allows studying the characteristics and properties of water/oil interfaces, particularly when the oil contains asphaltenes and when surfactants are present. In this work, we present a review of the measurements of crude oil-brine interfaces with the oscillating spinning drop technique. The review is divided into four sections. First, an introduction on the oscillating spinning drop technique, fundamental and applied concepts are presented. The three sections that follow are divided according to the complexity of the systems measured with the oscillating spinning drop, starting with simple surfactant-oil-water systems. Then the complexity increases, presenting interfacial rheology properties of crude oil-brine systems, and finally, more complex surfactant-crude oil-brine systems are reviewed. We have found that using the oscillating spinning drop method to measure interfacial rheology properties can help make precise measurements in a reasonable amount of time. This is of significance when systems with long equilibration times, e.g., asphaltene or high molecular weight surfactant-containing systems are measured, or with systems formulated with a demulsifier which is generally associated with low interfacial tension.

Reducing THI Injection and Gas Hydrate Agglomeration by Under-Inhibition of Crude Oil Systems

2021 ◽  
Author(s):  
Jose G. Delgado-Linares ◽  
Ahmad A.A. Majid ◽  
Luis E. Zerpa ◽  
Carolyn A. Koh
Keyword(s):  
High Pressure ◽  
Crude Oil ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Management Strategies ◽  
Crude Oils ◽  
Flow Assurance ◽  
Natural Surfactants ◽  
The One ◽  
Assurance Problem

Abstract Gas hydrates constitute a serious flow assurance problem. Over the last decades, industry has faced this problem by using avoidance methods (e.g. injection of thermodynamic hydrate inhibitors) and management strategies (e.g. addition of hydrate anti-agglomerants). In the former, hydrates are completely avoided by shifting the hydrate boundary towards higher pressure and lower temperatures; in the latter, hydrates are allowed to form but their tendency to agglomerate is reduced. It should be noted that some crude oils are naturally able to avoid hydrate agglomeration, this non-plugging tendency may originate from the surfactant-like behavior of fractions like asphaltenes and acids. Recent works have shown that the natural non-plugging potential of certain oils can be affected by the addition of polar molecules like alcohols. There is another strategy for managing hydrate that consist of the addition of THIs at a concentration lower that the one required to full hydrate inhibition. In this case, hydrates are under-inhibited. Studies carried out on hydrate agglomerating systems have shown that under-inhibition might prevent hydrate agglomeration only in a specific range of THI concentrations and sub-cooling; however, work on non-plugging oils is scarce. In this paper, the hydrate agglomeration of two crude oils under-inhibited with methanol and MEG was evaluated through a visual rocking cell apparatus and a high-pressure rheometer. Results showed that THIs and the crude oil's natural surfactants were capable of acting synergistically in reducing hydrate agglomeration and improving the system flowability.

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