Preformed particle gel (PPG) treatment is now one of the most effective remediation techniques for conformance controlling and selective plugging of high-water flow conduits in mature water-flooded oil reservoirs. Recognizing the intrinsic properties of PPGs, e.g., the swelling ratio, in reservoir condition is of prime importance to the optimization of their performance as plugging agents. In this study, the classical and three-level full factorial experimental design methods are joined with laboratory measurements to investigate the swelling ratio dependency of a new class of enhanced PPGs at different brine salinities and reservoir temperatures. To cover severe reservoir conditions, the reservoir temperature from 298 to 418 K and brine salinity from 0 to 225,000 ppm were considered during the laboratory measurements. The results show that the swelling ratio decreases by rising water salinity. Moreover, the swelling ratio rises by increasing reservoir temperature up to 380K and then starts to decrease. The factor screening illustrates that the swelling ratio is more dependent on salinity than the reservoir temperature in low salinity solutions, while is less dependent on salinity in high salinity solutions. In addition, a precise mathematical model was developed to predict the swelling ratio of PPGs in a wide range of salinities and temperatures. The results of this study present a practical insight into the swelling-related behavior of the PPGs at reservoir conditions.
Almohsin AM, Bai B, Imqam AH, Wei M, Kang W, Delshad M, Sepehrnoori K, Transport of nanogel through porous media and its resistance to water flow, SPE Improved Oil Recovery Symposium, Society of Petroleum Engineers (2014).
Imqam A, Bai B, Al Ramadan M, Wei M, Delshad M, Sepehrnoori K, SPE J., 20, 1083, 2014
Elsharafi MO, Bai B, Effect of strong preformed particle gel on unswept oil zones/areas during conformance control treatments, EAGE Annual Conference & Exhibition incorporating SPE Europec, Society of Petroleum Engineers (2013).
Okay O, General properties of hydrogels, Hydrogel sensors and actuators: Engineering and technology, Gerlach G, Arndt KF, Eds., Springer Berlin Heidelberg, Berlin, Heidelberg, 1 (2010).
Ozeroglu C, Birdal A, eXPRESS Polymer Lett., 3, 168, 2009
Young TS, Hunt JA, Green DW, Willhite GP, SPE Reservoir Engineering, 4, 348, 1989
Tu TN, Wisup B, Investigating the effect of polymer gels swelling phenomenon under reservoir conditions on polymer conformance control process, International Petroleum Technology Conference (2011).
Muhammed FA, Bai B, Al Brahim A, A simple technique to determine the strength of millimeter-sized particle gel, SPE Improved Oil Recovery Symposium, Society of Petroleum Engineers (2014).
Bai B, Huang F, Liu Y, Seright RS, Wang Y, Case study on prefromed particle gel for in-depth fluid diversion, SPE Symposium on Improved Oil Recovery, Society of Petroleum Engineers (2008).
Mousavi Moghadam A, Vafaie Sefti M, Baghban Salehi M, Dadvand Koohi A, J. Petroleum Exploration and Production Technol, 2, 85, 2012
Vasheghani-Farahani E, Vera JH, Cooper DG, Weber ME, Ind. Eng. Chem. Res., 29, 554, 1990
Cozic C, Rousseau D, Tabary R, Broadening the application range of water shutoff/conformance-control microgels: An investigation of their chemical robustness, SPE Annual Technical Conference and Exhibition, Society of Petroleum Engineers (2008).
Li H, Smart hydrogel modelling, Springer, New York (2009).
Dupuis G, Al-Maamari RS, Al-Hashmi AA, Al-Sharji HH, Zaitoun A, Mechanical and thermal stability of polyacrylamidebased microgel products for EOR, SPE International Symposium on Oilfield Chemistry, Society of Petroleum Engineers (2013).
Demirci U, Khademhosseini A, Gels handbook: Fundamentals, properties and applications (in 3 volumes), World Scientific Publishing Company Pte Ltd. (2016).
Jamshidi H, Rabiee A, Adv. Mater. Sci. Eng., 2014, 2014