NPS石油磺酸盐在孤岛地层砂上的吸附性能

Study on Adsorption of NPS Petroleum Sulfonate on Gudao Reservoir Sand

在70℃研究了NiX3石油磺酸盐在孤岛洗油地层砂上的静态和动态吸附。NPS为以渤海绥中低凝环烷基馏分油为原料，在实验室单管降膜式磺化反应器中用SO3磺化得到的石油磺酸盐，M=439．6。NiX3在孤岛地层砂上的最大吸附量为1．123mg／g砂，出现在CMC值（～3．0g／L）附近，NPS水溶液浓度进一步增大时吸附量略有下降。当NPS水溶液浓度为2．5g／L时，其吸附量随NaCl加量的增大（0-40g／L）而持续增大；当外加盐浓度为5．0g／L时，CaCl2、MgCl2、NaCl、Na2SO4使NPS吸附量由1．013mg／g砂分别增至2．338、1．541、1．501、1．484mg／g砂，NaHCOs、Na2CO3、NaOH使NP3吸附量分别降至0．884、0．643、0．614mg／g砂；随外加HPAM浓度增加（0-6．0g／L），NPS的吸附量出现最大值（超过1．7mg／g砂），最大值对应的HPAM浓度为3．0g／L。70℃下通过长30cm的地层砂填充管连续注入2．5g／L的NPS水溶液共10h，测得无盐溶液的动态吸附量为0．503mg／g砂，外加盐的影响相似，NaOH、Na2GO3使动态吸附量降低，Na2SO4、NaCl使其增大。对实验结果作了解释和讨论。图3表2参10。

The static and dynamic adsorption of petroleum sulfonate NPS of M = 439.6 on deoiled Gudao reservoir sand （RS） is studied at 70℃ NPS is a laboratory preparate, synthesized by sulfonating a petroleum fraction of low pour point naphthene base crude oil of Suizhong, Bohai, by SO3 in a falling filming single column apparatus. The adsorption of NPS from aqueous solution on the RSreaches a maximum of 1. 123 rng/g sand about at NPS＇s CMC value, -3.0 g/L, and slightly decreases at more higher concentration of NPS. From 2.5 g/L aqueous solution, NPS＇s adsorption on the RS increases continueously with increasing concentration of NaCl added （0-40 g/L）; an increase in the adsorption from 1. 013 mg/g sand for salt free solution to 2. 338, 1.541,1. 501, and 1.484 rng/g sand with CaCl2, MgCl2, NaCl, and Na2SO4 added, respectively, and a decrease to 0.884,0.643, and 0. 614 mg/g sand with NaHCO3, Na2CO3, and NaOH added, respectively, are observed at salt concentration 5.0 g/L; with increasing HPAM concentration up to 6.0 g/L, the adsorption of NPS goes through a maximum, a value exceeding 1.7 mg/g sand, at HPAM concentration 3.0 g/L. Injecting 2.5 g/L NPS aqueous solution continuously in 10 hrs through RS packs 30 cm long results in a dynamic adsorption of NPS on RS 0. 503 rng/g sand from salt free solution and in similar effects of salts added： the dynamic adsorption of NPS decreases with NaOH and Na2CO3 added and increases with Na2SO4 and NaCl added. The experimental results are explained and discussed.