Emulsified Polymer Gel Pickering Emulsion for Conformance Control: Emulsion Formulation, Stability and Coreflooding Investigation
- Tinku Saikia (CPG, KFUPM) | Abdullah Sultan (CPG, KFUPM) | Assad Barri (CPG, KFUPM) | Abdulmalek Shamsan (CPG, KFUPM)
- Document ID
- Society of Petroleum Engineers
- SPE International Conference and Exhibition on Formation Damage Control, 19-21 February, Lafayette, Louisiana, USA
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- Water Shut-off, Relative Permeability Modifier, Gel, Conference control, Pickering Emulsion
- 26 in the last 30 days
- 26 since 2007
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The water production from the oil wells not only increases the per barrel oil production cost but also raises environmental concerns. The use of conventional water shut-off techniques not only restricts the production of water but also reduces the oil production. The use of emulsified polymer gel system presents an efficient way for conformance control in the oil reservoirs. The emulsified polymer gel system was designed in such a way that it will separated into oleic and aqueous phase encountering higher reservoir temperature. The aqueous phase will become gel and provides the resistance towards the water flow whereas the oil phase will provide the passage to oil, towards the production well. In this research work, an emulsified polymer gel system was developed having polyacrylamide and polyethylenimine as aqueous phase and diesel as oleic phase. The organoclay Cloisite 20A was used as an emulsifier. The emulsified polymer gel system was characterized by dilution test, microscopic analysis and gel strength code. The developed emulsified polymer gel was found to be water-in-oil emulsion system, which formed rigid gel (gel strength grade-I) under reservoir temperature conditions. The thermal stability of the emulsion system was tested at 105°C. The emulsion stability index of the emulsified gel system was also calculated. To check the effectiveness of the developed emulsified gel system for conformance control, core-flooding experiment was performed at 105 °C. During the core flooding experiment, the system provides desired resistance to water flow whereas allow the diesel oil to produce with ease. This indicates that the developed emulsified polymer gel system is an effective conformance control system, which can be used in high temperature reservoirs. This research work presents a core flooding experiment study, to evaluate the performance of emulsified gel system (Pickering emulsion) for conformance control in high temperature reservoirs.
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