疏水缔合聚合物三元复合体系的静动态吸附行为

ABSORBANCE BEHAVIOR OF HYDROPHPPHOBI-CALLY ASSOCIATING POLYMER ASP COMPOUND FLOODING

针对大庆油田条件下疏水缔合聚合物ASP三元复合驱新配方,研究了两种复合体系中各驱油剂的吸附量并对其特征进行了分析。通过岩心流动实验,测定了两种ASP三元复合体系中四种驱油剂在含油、不含油条件下的饱和滞留量和注入0.3PV时的滞留量。研究结果表明,在复合体系中,碱和表面活性剂在大庆岩心砂上的吸附都符合Langmuir吸附,吸附等温线为L型;疏水缔合聚合物的吸附等温线是由L型和H型组合而成,吸附等温线出现最高点,表现出多层吸附的特征;氢氧化钠的吸附量和滞留量都大于碳酸钠的吸附量和滞留量;表面活性剂和疏水缔合聚合物在氢氧化钠复合体系中的吸附量都小于碳酸钠复合体系中的吸附量;碱和表面活性的滞留量都小于在大庆岩心砂上的吸附量,而缔合聚合物的滞留量却大于吸附量;含油岩心中,碱、表面活性剂和疏水缔合聚合物的滞留量都小于在不含油岩心中的滞留量。结论对ASP复合驱体系的组成、段塞设计、油藏数值模拟等有一定的参考价值。

The absorbance of displacement agents in two Hydrophobically Associating Polymer(HAP) ASP compound flooding new descriptions used for DaQing oil field were studied and analyzed. Through cores flowing test the storable retentive quantity and the retentive quantity with 0.3pv of the four displacement agents were determined in oil cores and dry cores. The results indicates that the isotherm of alkali and surfactant absorbing in the Daqing core sand is the L type in compound systems, while the one of HAP were made up by the L type and H type, demonstrated the multi - layer characteristic; Compound, the absorbance and retentive quantity of NaOH are greater than the ones of sodium carbonate; The absorbance of Surfactant and HAP in NaOH compound system is smaller than the one in sodium carbonate compound system; The storable retentive quantity of Surfactant and alkali is larger than the absorbance, while the one of HAP is obverse; The storable retentive quantity of Surfactant, alkali and HAP in oil cores are much small than the one in dry cores. In some extent, the conclusion from this paper will contribute on the constitution of ASP system, slug design and numerical simulation etc.