caa a22 4500 606226516 CHVBK 20210128101153.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10553-015-0592-y doi (NATIONALLICENCE)springer-10.1007/s10553-015-0592-y Integrated Technology of Water Plugging and Acidizing of Hydrofractured Oil Wells [Elektronische Daten] [Zhi-feng Luo, Li-qiang Zhao, Ping-li Liu, Zheng-ku Wang] An integrated technology combining water plugging and acidizing in the same flooded oil well is studied with the goal of controlling the water content of the oil and attaining a comprehensive synergy. For this, a micro- and macro-fracture porosity model and four models with other kinds of fractures are built. The feasibility of application of gel water plugging system in this integrated technology is evaluated. The experimental results show that the gel system is effective in high-permeability interlayer plugging (plugging degree >99%), but not very effective in low-permeability interlayers. Multi-slug injection reduces the impact of subsequent acidizing on the effectiveness of the pugging material. At the same time, the degree of oil recovery by displacement with water for the fracture porosity model is not high, but after polymer plugging system injection, recovery increases, reaching more than 60%. The proposed integrated technology was applied in two wells in the Chongqing oilfield. Oil production of each well increased on an average by 1 ton/day for more than one year. Springer Science+Business Media New York, 2015 water inrush into well nationallicence water plugging and acidizing nationallicence integration nationallicence pore model nationallicence gel system nationallicence enhanced oil recovery nationallicence Luo Zhi-feng Southwest Petroleum University, Chengdu, China aut Zhao Li-qiang Southwest Petroleum University, Chengdu, China aut Liu Ping-li Southwest Petroleum University, Chengdu, China aut Wang Zheng-ku Chongqing University of Science and Technology, Chongqing, China aut Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/2(2015-05-01), 190-198 0009-3092 51:2<190 2015 51 10553 https://doi.org/10.1007/s10553-015-0592-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10553-015-0592-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luo Zhi-feng Southwest Petroleum University, Chengdu, China aut NATIONALLICENCE 700 1- Zhao Li-qiang Southwest Petroleum University, Chengdu, China aut NATIONALLICENCE 700 1- Liu Ping-li Southwest Petroleum University, Chengdu, China aut NATIONALLICENCE 700 1- Wang Zheng-ku Chongqing University of Science and Technology, Chongqing, China aut NATIONALLICENCE 773 0- Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/2(2015-05-01), 190-198 0009-3092 51:2<190 2015 51 10553