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本文系统地论述了木质素磺酸盐的性质、对其在三次采油中的应用原理和效果作了讨论。文章指出,在含有2～5%木质素磺酸盐处理液中,硅酸盐含量不小于0.4%(SiO_2/Na_2O=2.06～3.33)时,其胶凝时间可达800小时,故可作为热力采油中的深度调剖剂:在现场表面活性剂驱试验中,加入改性的木质素磺酸盐后,表面活性剂在每克碳酸钙表面的吸附量由21.6毫克下降为1.0毫克,采收率由64.5%上升为84.1%,故可用作化学驱油中的吸附牺牲剂;将其与石油磺酸盐复配,能产生良好的协同效应。由于木质素磺酸盐具有原料来源广、使用方便、价格便宜等特点,因此在技术与经济上是可行的。
This paper systematically discusses the properties of lignosulfonates, and discusses the application principles and effects of the lignosulfonates in the third oil recovery. The article points out that when the content of silicate is not less than 0.4% (SiO_2 / Na_2O = 2.06 ~ 3.33), the gelation time can reach 800 hours in 2% -5% lignosulfonate treatment liquid, so it can be used as heat Deep profile control agent in oil recovery: In the field surfactant flooding test, the amount of surfactant adsorbed per gram of calcium carbonate surface decreased from 21.6 mg to 1.0 mg after the addition of modified lignin sulfonate, The rate of increase from 64.5% to 84.1%, it can be used as a chemical flooding in the adsorption of sacrificial agents; its combination with the petroleum sulfonate, can produce a good synergistic effect. Lignosulfonates are technically and economically feasible due to their wide availability of raw materials, ease of use and low prices.