驱油用疏水缔合聚合物临界缔合浓度的性能研究

Study on the Properties of the Hydrophobic Associating Polymer Solution Upper and Lower the Critical Associating Concentration

对自制的用于高温高盐油藏驱油用疏水缔合聚丙烯酰胺(HAPAM)处于临界缔合浓度(CAC)上下的两个浓度的溶液进行了各项性能评价对比。结果表明,该HAPAM在高于CAC之上表现出优异的性能:当NaCl溶液质量浓度从70 000 mg/L增长到200 000 mg/L时,聚合物溶液的黏度增长30倍,在180 000 mg/L模拟盐水中,90℃时的黏度是30℃时的6.2倍,显示出良好的耐温抗盐性;在变剪切实验中显示良好的剪切恢复性;流变学研究表现出具有明显的黏弹性;岩心实验结果表明,高于CAC的聚合物注入压力传播更均匀。

For approve the properties difference of hydrophobic associating polyacrylamide （HAPAM） solutions upper and lower the critical associating concentration （ CAC）, the HAPAM which can be used in high mineralization and high temperature oil reservoir was synthesized, and the properties of the HAPAM solutions were tested. The results showed the excellent properties of the solutions were found while the concentration was upper the CAC： There was 30 times increase of the HAPAM solution viscosity while the NaC1 concentration increased from 70 000 mg/L to 200 000 mg/L; In 180 000 mg/L synthetic brine, the viscosity of the HAPAM solution under 90 ~C was 6. 2 times of the value under excellent properties in salt resistance and temperature tolerance ; The outstanding 30 ℃, which showed an shear recovery ability and viscoelasticity were also found by shear and frequency scan measurement, and also showed in the seepage flow measurements, there was a better pressure transmission while the HAPAM concentration was above the CAC.