With the continuous exploration and development of heavy oil and gas resources,the viscosity of heavy oil becomes high.During thermal recovery process,oil and gas temperature is very low due to large heat dissipation,resulting in poor fluidity and even solidification,which reduces the production of heavy oil.In order to solve this problem,HYA-1,a nano hydrophilic aerogel with good dispersion characteristics,is prepared from SiO2 aerogel through modifying it with n-octane solvent in laboratory.Research shows that after curing for 14 days with 2％HYA-1,the compressive strength of the cement paste does not decline significantly,the flexural strength increases by 1.09 times,showing good mechanical properties.The permeability and thermal conductivity of the cement paste declines by 97％and 91％,respectively,realizing the low thermal conductivity of silica aerogel.As HYA-1 is applied to the thermal recovery cementing well in Luda,the thermal conductivity of the thermal recovery cementing slurry reduces significantly.The cementing quality is excellent,solving the problem of large heat loss in thermal recovery wells in the Liaodong Bay area of Bohai Sea,and meeting the thermal insulation requirements of normal thermal recovery cementing slurry.
hydrophilic aerogelthermally recovering heavy oil welllow thermal conductivityhigh strength
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