Research and Performance Evaluation of Nano Foam Drainage Agent for Gas Well Drainage and Gas Production
Gas production by foam drainage is a common technical measure in the middle and later period of water bearing natural gas well development.In order to further improve the foam stability of foam drainage agent for shale gas well drainage and gas production,the foaming agent BY-1 and foam stabilizer HW-3 with better performance were selected through a large number of indoor experiments,and the stability of the foam system was improved by introducing nano particles.A nano foam drainage agent system suitable for shale gas well drainage and gas production was developed,and the temperature resistance,salt resistance and oil resistance of the system were evaluated.The results showed that the temperature resistance of the nano foam discharge agent system was good.With the increase of aging temperature,the foaming volume and half life of foam of the system first increased and then decreased.When the aging temperature was 120℃,the foaming volume and half life of foam could still reach 450 mL and 330 min;the salt resistance of nano foaming agent system was good.With the increase of salinity,the foaming volume of the system gradually decreased,and the liquid carrying capacity of foam decreased first and then increased.When the salinity of brine reached 1.0×105 mg·L-1,the foaming volume and liquid carrying rate of foam could still reach 425 mL and 80.6%;the nano foaming agent system had good oil resistance.With the increase of kerosene volume fraction,the foaming volume and foam liquid carrying rate of the system gradually decreased.When the kerosene volume fraction was 30%,the foaming volume and foam liquid carrying rate of the system could still reach 420 mL and 50.7%.
Shale gas wellsDrainage and gas extractionFoaming agentStabilizerNanoparticles
NETL
NSTL
万方数据
