The Property Variations of Produced Polyacrylamide from Polymer Flooding Reservoirs and Their Effects on Concentration Detection
Because the injected polymer (polyacrylamide) often quickly breaks through to production wells during polymer flooding, its concentration detection is very significant. However, due to the variations in the relative molecular mass and the degree of hydrolysis of produced polymer, the conventional detection methods, including the viscosimetry and starch-cadmium iodide colorimetry, are no longer suitable to detect its real concentration. This paper introduced a new detection method-ultrafiltration concentration film's desaturation. By purifying and concentrating the produced polymer solution using an ultrafiltration system, then dehydrating the aqueous and dry up the remains, this method can detect the concentration directly. The said method has been evaluated in the laboratory and compared with the other two conventional detection methods, verifying its adaptability and high exactitude. The produced polymers from three different polymer flooding units have been detected using this novel method. The results show that the produced polymer relative molecular mass decreased greatly but its degree of hydrolysis increased obviously. The reasons and differences have been analyzed. These corresponding variations makes the detected results by the conventional methods be much lower than the actual, meaning that the previous methods need to be improved or replaced.
Y. Wang et al., "The Property Variations of Produced Polyacrylamide from Polymer Flooding Reservoirs and Their Effects on Concentration Detection," Proceedings of the 2008 AIChE Spring National Meeting (2008, New Orleans, LA), American Institute of Chemical Engineers, Apr 2008.
2008 AIChE Spring National Meeting (2008: Apr. 6-10, New Orleans, LA)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Polymer Flooding; Produced Effluents; Property, Detection; Ultrafiltration, Polyacrylamide; ABS Resins; Cadmium; Concentration (Process); Hydrolysis; Molecular Mass; Polymer Solutions; Signal Detection; Springs (Components); Conventional Methods; Desaturation; Detection Methods; Novel Methods; Polyacryl Amides
International Standard Book Number (ISBN)
Article - Conference proceedings
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