Carboxylate surfactant systems exhibiting phase behavior suitable for enhanced oil recovery

1984 ◽  
Vol 61 (8) ◽  
pp. 1395-1399 ◽  
Author(s):  
J. E. Shaw
Keyword(s):  
Phase Behavior ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Surfactant Systems

Solution properties and phase behavior of a combination flooding system consisting of hydrophobically amphoteric polyacrylamide, alkyl polyglycoside and n-alcohol at high salinities

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 69980-69989 ◽  
Author(s):  
Rui Liu ◽  
Wanfen Pu ◽  
Lili Wang ◽  
Quansheng Chen ◽  
Zhihong Li ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Solution Properties ◽  
Alkyl Polyglycoside ◽  
P Application ◽  
Polymer Surfactant

Application of polymer/surfactant (SP) combination flooding technique is attracting considerable interest in enhanced oil recovery (EOR).

Characterization and phase behavior of the surfactant ionic liquid tributylmethylphosphonium dodecylsulfate for enhanced oil recovery

2016 ◽  
Vol 417 ◽  
pp. 87-95 ◽  
Author(s):  
Iria Rodríguez-Escontrela ◽  
Iago Rodríguez-Palmeiro ◽  
Oscar Rodríguez ◽  
Alberto Arce ◽  
Ana Soto
Keyword(s):  
Ionic Liquid ◽  
Phase Behavior ◽  
Enhanced Oil Recovery ◽  
Oil Recovery

scholarly journals THE EFFECT OF HARDNESS AND TEMPERATURE ON INTERFACIAL TENSION OF INDIVIDUAL AND MIXED SURFACTANT SYSTEM

2020 ◽  
Vol 2 (1) ◽  
pp. 62-65
Author(s):  
NUR ASYRAF MD AKHIR ◽  
AFIF IZWAN ABD HAMID ◽  
ISMAIL MOHD SAAID ◽  
ANITA RAMLI
Keyword(s):  
Interfacial Tension ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Alkyl Ether ◽  
Mixed Surfactant ◽  
Mixed Surfactant System ◽  
Mixed Surfactant Systems ◽  
Surfactant System ◽  
Surfactant Systems ◽  
The Individual

Surfactant flooding is one of the chemical enhanced oil recovery (CEOR) techniques that can be used to improve oil recovery. The surfactant injection reduces the oil-water interfacial tension and mobilizes residual oil towards the producing well. In this paper, the performance of alkyl ether carboxylate (AEC) and calcium lignosulfonate (CLS) in individual and mixed surfactant systems were investigated based on their ability to reduce the interfacial tension through a spinning drop method.   The interfacial tensions of individual and mixed surfactant systems in different brine systems were measured against decane at 25°C and 98°C. The results show that the individual and mixed surfactant systems in 3.5 wt.% NaCl brine has a significant reduction in interfacial tension at 98°C. In contrast, the presence of hardness in 2.5 wt.% NaCl and 1.0 wt.% MgCl2 brine reduces the interfacial tension of the individual AEC surfactant system and mixed surfactant system significantly at 98°C except for the individual CLS system. Meanwhile, the interfacial tension of mixed surfactant system decreases with increasing surfactant concentration in two brine systems and at 98°C. The findings show the significant application of the AEC and CLS surfactant mixture considering the harsh reservoir conditions for the chemical enhanced oil recovery application.

Correlation of Emulsion Stability With Phase Behavior in Surfactant Systems for Tertiary Oil Recovery

1980 ◽  
Vol 20 (05) ◽  
pp. 402-406 ◽  
Author(s):  
James E. Vinatieri
Keyword(s):  
Phase Behavior ◽  
Oil Recovery ◽  
Emulsion Stability ◽  
Equilibrium Phase ◽  
Phillips Petroleum ◽  
The North ◽  
Three Phase ◽  
Tertiary Oil Recovery ◽  
Surfactant Systems ◽  
Oilfield Operations

Abstract This paper describes a study of the emulsions which could occur during a pilot surfactant flood, such as that conducted by Phillips Petroleum Co. in the North Burbank Unit, Osage County, OK. The phase behavior of this surfactant system can be characterized by three types of microemulsions, with the transition from one type to another being a function of the salinity. The rate at which emulsions coalesce was seen to correlate directly with the type of microemulsion. Coalescence was slow for macroemulsions at low salinities, rapid at intermediate salinities (where the final state was a three-phase system), and varied from slow to rapid at salinities above the three-phase region. Knowledge of the correlation between phase behavior and emulsion stability can be useful in treating macroemulsions produced during a surfactant flood. Introduction With the increased emphasis currently being placed on the use of surfactants for tertiary oil recovery, a potential problem exists with emulsions which can be produced as a consequence of a surfactant flood. For example, if a channeling problem between an injection well and a production well should occur, it may be possible to produce relatively large amounts of surfactant at moderately high concentrations (0.2 to 2.0070). Under these conditions, emulsions of oil and brine could be stabilized by the presence of the surfactant and could pose a serious problem. Although these emulsions are thermodynamically unstable and ultimately should separate into bulk oil and water phases, the presence of surfactants can increase greatly the time required for such separations. Typical oilfield operations allow, at most, several hours for this separation of phases to occur, but some emulsions containing surfactants may require weeks or even months to separate. Thus, a definite need exists for being able to accelerate this coalescence process. Phillips Petroleum Co. is conducting a pilot surfactant flood in the North Burbank Unit (NBU) in Osage County.1,2 The work reported here was directed at developing a contingency plan for breaking emulsions which may be produced by this surfactant flood. The problem of studying emulsions produced by a surfactant flood has two aspects:the nature of the phases which result when thermodynamic equilibrium finally is attained andthe rate at which this equilibrium state is reached. This is not to imply that any emulsion can be described completely by characterization of these two properties but rather that these are the two properties most important to oilfield operations and, hence, form the basis for the work reported here. The next section discusses the equilibrium properties of surfactant systems and the one following discusses the coalescence of emulsions. The fourth section describes the use of chemical demulsifiers to accelerate coalescence. Equilibrium Phase Behavior The equilibrium phase behavior of systems of oil and water containing appreciable amounts of surfactant (i.e., 0.5%) is characterized by the presence of microemulsions.1,3-5 These microemulsion phases have a high degree of structure and may contain large amounts of both oil and water.

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