驱油用表面活性聚合物SLH-Ⅰ的水溶液流变特性

Rheologic Behavior of Aqueous Solutions of Surface Active Polymer SLH-Ⅰ for EOR

报道了具有表面活性的驱油用丙烯酰胺共聚物SLH-Ⅰ水溶液45℃下的流变特性。SLH-Ⅰ分子支链上含有季铵盐型表面活性基团。与HPAM聚合物MO4000相比，在相同浓度下（≤2．0g／L）SLH-Ⅰ在蒸馏水中的增黏能力高1倍，在矿化度5．2g／L的含钙镁模拟污水中高5倍以上。当剪切速率由0，11／s增至10001／s时，0．5～2．0g／L SLH-Ⅰ模拟污水溶液的黏度先上升（剪切增稠）后下降（剪切变稀），而MO4000溶液的黏度基本上是下降的（剪切变稀）。0．5～2．0g／L的SLH-Ⅰ蒸馏水溶液在频率0．1～100Hz区间的G’、G”曲线，与一般ⅫPAM相比有明显差剐，低频率下G’〉G”而高频率下G”〉G’，且转变点频率随溶液浓度升高而增大，即SLH-Ⅰ在低溶液浓度、低频率下即具有高的弹性。浓度均为1．0g／L的模拟污水溶液，SLH-Ⅰ的G’和G”均高于MO4000，G’更高出一个数量级。SLH—Ⅰ的这种特殊流变性与其分子间的强相互作用导致的超分子结构形成有关。根据聚合物溶液与原油摇振乳化后分水率随时间的变化，M04000不能乳化原油，SLH-Ⅰ在溶液浓度≥0．5g／L时可乳化原油，溶液浓度越高乳状液越稳定，1．0g／L溶液与原油在油水体积比1：9-6：4时形成O／W乳状液，7：3～9：1时形成W／O乳状液。图7参6。

The rheologic behavior of aqueous solutions of an aerylamide copolymer with emulsifying activty, SLH-Ⅰ , is investigated at 4512. Copolymer SLH- Ⅰcontains surface active quartemary ammonium salt functionalities in side chains, The visccaifying capability of SLH-Ⅰ in distilled water is 2 times and in Ca^2＋ ＋ Mg^2＋ containing artificial produced water （APW） of TSD = 5.2 g/L is 6 times as high as that of HPAM MO4000. At shear rate increasing from 0.1 to 1000 l/s, the apparent viscosity of 0.5--2.0 g/L SLH- Ⅰ solution in APW increases at first （shearing thickening） and then decreases （shearing thinning） and of MO4000 solution in APW practically continuously decreases （shearing thinning）. For 0.5--2.0 g/L SLH- Ⅰ solution in distilled water, the storage and loss nx）dulus, G＂ and G＂, vz oscilating frequency relationships are different from that for solutions of HPAM polymers in that G＂ 〉 G＂ is observed at lower frequencies and G＂ 〉 G＇-- at higher frequencies and the frequency of transition point is increased with increasing SLH-Ⅰ concentration in solution, that is, SLH- Ⅰ solution in distilled water has high elasticity at lower concentrations and at lower frequencies. As compared with MO4000, SLH-Ⅰ always has higher G＇ and G＂ vlues in 1.0 g/L solution is APW with G＇ values being higher by an order of magnitude. The unique rheologi behavior of SLH-Ⅰ is considered to be related with strong intermolecular interactions of SLH- Ⅰ and supermolecular structure formation by SLH-Ⅰ in solution. Asdemonstrated by determinations of water separation from polymer solution/crude oil emulsions with time, MO4000 can not and SLH- Ⅰ in solution of concentration≥0. 5 g/L can emulsify crude oil; the crude oil emulsions formed appear to be more stable at higher SLId- Ⅰ concentrations; O/W emul- sions are formed at oil to water volume ratio 1 ： 9---6： 4 and w/o emulsions 7 ： 3--9：1 when SLH-Ⅰ concentration is solution being of 1.0 g/L.