02115nab a2200277 4500 20260520003101.0 260224s2012 xxu ing Inglés Study of the Plugging of Oil Well Sand Control Area in a Polymer Flooding Region mayo/jun. 2012 15/05/2013 ; 14/05/2013 8 p. ; 403-411 Traducción del resúmen del autor: The plugging of the oil well sand control area in a polymer flooding region was studied and the plugging substances were analyzed through UV-Vis spectrophotometer analysis, plasma emission spectrometry analysis, laser particle size analysis, X-Ray Diffractometer (XRD) analysis, microscopic observation, chromatograph-mass spectrometer, etc. It is inferred that the main reason for the plugging of the sand control area was the adsorption, gathering and bridging of PAM on the surface of the sand. The migration of the mineral fines from the stratum and the adsorption of the crude oil ingredients on the surface of the fines also result in plugging. An experimental study on the polymer degradation was performed and two types of plug removal agents, potassium persulfate and sodium thiosulfate, were selected and tested. It showed that potassium persulfate and sodium thiosulfate could degrade the plugging substances and recover core permeability effectively. Moreover, field application tests were conducted in Gudao oil field which showed the restoration of the performance of various wells. It also indicated that the injection pressure obviously decreased and liquid production per day increased greatly after application of the plug removal agents in the sand control area. 3 Oil and Gas Science and Technology 67 ARTICULO Liu, Dong 41646 Liu, Huiqing 42025 Hou, Jian 42580 Li, Zhuo 53182 Zhao, A-Zhen 53183 Li, Li 34560 Zhou, Chengshi 53184 Sun, Huili 53185 187692 187692 0 0 0 0 255511 BAAB BAAB 2026-03-06 200059834 0 200059834 2026-03-06 00:17:40 2026-03-06 ARTICULO