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.
Highlights
Real-time permanent monitoring and control is important in maximizing the hydrocarbon production from oil and gas wells
It is evident that original rock surface properties and its modification during the Enhanced Oil Recovery (EOR) process determine the efficiency of oil recovery from reservoirs
ASP flooding is a chemical EOR process which involves the injection of surfactant, alkaline and polymer into an oil reservoir targeted to produce the remaining residual oil, which could not be recovered by conventional water flood [32]
Summary
Real-time permanent monitoring and control is important in maximizing the hydrocarbon production from oil and gas wells. Zeta potential is one of the critical parameters to characterize the surface properties, where its average measurement of reservoir rock could be potentially estimated using streaming potential measurement as a new promising tool. There were no further studies from past researchers on how streaming potential behaves and its significant uncertainties when ASP changes the properties of porous media. The purpose of this paper is to review the streaming potential measurement in downhole monitoring with an insight on EOR application and propose the potential of streaming potential application in ASP flooding. This could provide new prospect and knowledge in the relationship between streaming potential and ASP mechanisms
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