Behaviour And Application Of Interface Property In Additive For Acidizing

It is very important to study the behaviour and application of interface property in additive for acidizing, which improve the the quality and study the cleanup additive and anti-clay-swelling agent's mechanism deeply and roundly.Acorrding to study the afection of surface tension, interfacial tension and wettability for the flowback of the reacted acid at 30℃in 20%HCl.The experiment shows that when thesurface tension is 24mN/m,the flowback ration is 81.2%.,when the surface tension is constant,the contact angle from 42.5oto intermediate wettability,the flowback ration added 30%.The cleanup mechanism of fluorosurfactant is to decrease the surface tension, interfacial tension; the cleanup mechanism of organosilicon is to change the wettability; the cleanup mechanism of ampholytics cationics surfactant and non-ionic surfactant is the together effect of the low surface tension and changing the wettability.Acorrding to study the the effect of the Zeta value and wettability of the anti-swelling,The inorganic salt is to decrease the Zeta value to -10mV,only the dosage as high as 40g/L,the anti-swelling ration can get 90%, the cation monomer can reverse the Zeta. The anti-swelling effect of ETA is good, the dosage of 2g/L,it's anti-swelling raton is 80%.The anti-swelling mechanism of the organosilicon is to change the wettability; the anti-swelling mechanism of the cation monomer,cationic surfactant is the together effect of decreasing the Zeta value and changing the the wettability.The CH-1 which is composed of the cation monomer, non-ionic surfactant,fluorosurfactant and organosilicon has good ablity of flowback the actived acid and anti-swelling ration, At a dosage of 200 mg/L, the flowback ration is over 85%, At a dosage of 1%,the anti-swelling ration is over 85%, having good anti-temperature , having good compatibility with other additive.