A Comprehensive Review of Alkaline-Surfactant-Polymer (ASP) Flooding

Sheng, James J.

doi:10.2118/165358-ms

Cited by 170 publications

(117 citation statements)

References 76 publications

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“…In addition, most of the oil fields have been under water flooding, which favour the implementation of chemical EOR method. Therefore, the facilities required to add chemicals in the injection water could be reduced [15]. ASP flooding is subjected to several processes in enhancing oil recovery, including interfacial tension (IFT) reduction between trapped oil phase and ASP slug [32,33], improving mobility control and sweep efficiency [34] as well as wettability alteration by surfactant to more favourable state [35].…”

Section: Alkaline-surfactant-polymer Floodingmentioning

confidence: 99%

“…IFT reduction is the most preferable method due to its practicality, where IFT reduction between oil and a surfactant solution can be achieved in the range of 20-30 to 10 -3 mN/m. Instead, the injection fluid velocity is limited by pump capacity or formation injectivity leading to formation fracture, while increasing injection fluid viscosity using too high polymer concentration is associated with solubility issue [15]. Crude oil contains organic acid and salts, alcohols and other natural surface-active agents.…”

Section: Mechanisms Of Surfactant Floodingmentioning

confidence: 99%

“…This generated surfactant is referred as soap in order to distinguish it from the synthetic surfactant. The reaction equation is as follows [15]:…”

Section: Mechanisms Of Alkaline Floodingmentioning

confidence: 99%

“…Synergistic IFT reduction is produced by the surfactant and alkali while polymer improves sweep efficiency by emulsions [14]. The summary of mechanisms and synergies in ASP is shown as follows [15]:…”

Section: Mechanisms and Synergy In Aspmentioning

confidence: 99%

“…ASP changes the environment in porous media, including IFT reduction, wettability alteration, ionic adsorption at the interface and degree of alkalinity [14], which could improve sweep efficiency. ASP provides synergy of alkaline, surfactant and polymer [15]. ASP mechanisms should be well understood, since they have significant effects on the behaviour of streaming potential.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Streaming Potential in Downhole Application: An Insight for Enhanced Oil Recovery Monitoring

et al. 2016

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Abstract. Downhole monitoring using streaming potential measurement has been developing in order to respond to actual reservoir condition. Most studies have emphasized on monitoring water flooding at various reservoir condition and improving the approaches of measurement. Enhanced Oil Recovery (EOR) could significantly improve oil recovery and the efficiency of the process should be well-monitored. Alkaline-surfactant-polymer (ASP) flooding is the most promising chemical EOR method due to its synergy of alkaline, surfactant and polymer, which could enhance the extraction of residual oil. However, limited studies have been focused on the application of streaming potential in EOR processes, particularly ASP. Thus, this paper aims to review the streaming potential measurement in downhole monitoring with an insight for EOR application and propose the potential measurement in monitoring ASP flooding. It is important for a preliminary study to investigate the synergy in ASP and the effects on oil recovery. The behaviour of streaming potential should be investigated when the environment of porous media changes with respect to ASP flooding. Numerical model can be generated from the experimental data to forecast the measured streaming potential signal during production associated with ASP flooding. Based on the streaming potential behaviour on foam assisted water alternate gas (FAWAG) and water alternate gas (WAG) processes, it is expected that the streaming potential could change significantly when ASP flooding alters the environment and surface properties of porous media. The findings could provide new prospect and knowledge in the relationship between streaming potential and ASP mechanisms, which could be a potential approach in monitoring the efficiency of the process.

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