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SDGD是室内研制的阴离子、两性表面活性剂和助剂的复配物。考察了SDGD对孤东稠油的乳化降粘作用并与碱 (NaOH)水作了对比。在 5 0℃、油水质量比为 7∶3条件下 ,0 .5g/dLSDGD蒸馏水溶液与稠油形成的乳状液粘度仅为 32mPa·s ,相同浓度的SDGD在矿化度 10 0 0 0mg/L、含Ca2 + +Mg2 + 15 0mg/L的矿化水中的溶液与稠油形成的乳状液粘度略高于 6 0mPa·s,对稠油 (90 0 0mPa·s)的乳化降粘率均在 99%以上 ,乳状液不稳定 ,易破乳。矿化度维持 10 0 0 0mg/L不变 ,SDGD可以抗耐的Ca2 + +Mg2 + 浓度为 2 5 0mg/L。粘土样在 5 g/dLSDGD水溶液中的膨胀程度小于在相同浓度KCl水溶液中的膨胀程度。因此 ,SDGD可用于高矿化度稠油油藏的乳化降粘开采。碱水作为稠油乳化降粘剂 ,在高矿化度特别是高钙镁离子浓度条件下效果很差。讨论了SDGD和NaOH在稠油乳化降粘中的有关机理。
SDGD is an in-house developed anionic, amphoteric surfactant and adjuvant complex. The effect of SDGD on the viscosity-reducing effect of heavy oil was studied and compared with alkali (NaOH) water. Under the conditions of oil-water mass ratio of 7: 3, the viscosity of the emulsion of 0.5g / dLSDGD distilled water and heavy oil was only 32mPa · s at 50 ℃ and the SDGD of the same concentration was 10 000 mg / L , The viscosity of emulsions formed by the solution containing mineral oil Ca2 + + Mg2 + 150 mg / L and heavy oil is slightly higher than 60 mPa · s, and the rate of decrease in the emulsification of heavy oil (90 000 mPa · s) More than 99%, emulsion instability, easy breaking milk. The degree of salinity remained unchanged at 100 mg / L, and the concentration of Ca2 + + Mg2 + resistant to SDGD was 250 mg / L. The degree of swelling of clay samples in 5 g / dLSDGD aqueous solution was less than that in KCl aqueous solution at the same concentration. Therefore, SDGD can be used for emulsification and viscosity reduction in high-salinity heavy oil reservoirs. Alkali water as a heavy oil emulsion viscosity reducer, in the high salinity, especially high concentrations of calcium and magnesium ions under the conditions of poor results. The mechanism of SDGD and NaOH in viscoelastic emulsification is discussed.