Formula for Plugging Agent Used in Baolang Oilfiled Coal Seam and Performance of Plugging Agent
Sun Yingsheng Li Feipeng Yin Xiaojing Song Chunhong Wen Dongliang (Research Institute of Petroleum Engineering,Nanyang Oilfield Company of Sinopec,Nanyang 473121)
Plugging agent used in coal seam was developed comprising water-soluble thermosetting resin,polymers with resistance to high temperature,superfine particle enhancer and other additives,and the above plugging agent was evaluated. The results show that the plugging agent has the characteristics such as low initial viscosity,good fluidity,and controlled gelling time. The plugging agent could infiltrate coal seam and bond with coal seam and had micro-swelling properties in absorbing water after it was solidified,therefore compact soft coal seam.The plugging agent had good resistance to high-temperature,high pressure,and high salinity,and high resistance to corrosion. The plugging agent has high gel strength and plugging performance with plugging ratio over 99.6%.