一种阴/非离子表面活性剂的静态吸附实验研究

The static adsorption research of anion/nonionic surfactant

研究了阴/非离子两性表面活性剂SHSA-01在S7净砂以及单矿物上的静态吸附规律,采用紫外分光光度法测定吸附前后溶液浓度变化。结果表明,石英石最大吸附量为0.813 mg/g左右,表面活性剂在几种矿物吸附量大小顺序为:石英石<钾长石<方解石<伊利石<绿泥石。储层中黏土矿物的含量决定了表面活性剂的吸附程度,沙7净砂对SHSA-01的吸附量随浓度的增加而增加;矿化度越大,吸附量越小;表面活性剂在储层砂上的静态吸附量均随浸泡时间的延长而增加,24 h后吸附量增加相对缓慢。聚合物62210的加入有利于降低SHSA-01的吸附损失,且降低程度较大。

The static adsorption law of anion/nonionic surfactant SHSA-01 on oil sand in S7 block and mineral have been developed. According to the ultraviolet spectrophotometric method, we have determined the concentration of solution before adsorption or after. The results showed that the static adsorptive capacity on silica sands was 0.813 mg/g at most.The adsorption degree of SHSA-01 on 5 kinds of mineral powder is as follows, silica sand potassium feldspar calcspar glimmerton chlorite. The content of clay mineral in reservoir determined the degree of the adsorption. The higher concentration of SHSA-01 in Sha-7block, the more adsorption.High sality, and otherwise low absorption. More steeping time,high adsorption, the balance time is 24 h.It＇s benefit to reduce the absorption for adding the polymer 62210, and reduced a great degree.