复配表面活性剂/碱驱油体系中石油羧酸盐与重烷基苯磺酸盐的吸附研究  

Simultaneous Adsorption of Petroleum Carboxylates and Heavy Alkyl Benzene Sulfonates from Surfactants/Alkaline Flooding Solutions

作　　者：黄宏度[1] 何涛[1] 吴一慧[1] 万安[1] 

机构地区：[1]长江大学石油工程学院,湖北荆州434023

出　　处：《油田化学》2004年第4期361-363,371,共4页Oilfield Chemistry

基　　金：国家973专项(编号G1999022501)资助

摘　　要：在45℃下测定了石油羧酸盐(室内制品O126,工业品ICO435)和重烷基苯磺酸盐(工业品WGN和ORS 41)从混合溶液中的吸附量。配液用水为大庆采油四厂净化污水,矿化度为4 3g/L。在静态吸附测定中液固比(mL/g)范围为1∶8～8∶1。在人造岩心粉上,O126/WGN(2 4/0 6g/L)溶液中O126和WGN的静吸附量随液固比的增大而增大;加入电解质NaOH,NaCl或Na2CO3(9 0g/L)使吸附量增大,其中Na2CO3的影响程度较小;在液固比1∶4下,吸附后的不含和含电解质的溶液中O126和ORS 41的摩尔浓度比大体上接近初始比值(0 7971)。在大庆去油油砂上,吸附后ICO435/WGN/Na2CO3(5 33/0 67/10 0g/L)溶液中ICO435与WGN的摩尔浓度比,在液固比1∶4时为0 9063,接近初始比值(0 8919)。在人造岩心驱油中,注入O126/ORS 41/NaOH/HPAM(0 77/0 82/12 0/1 2g/L)驱油溶液0 3PV和HPAM(0 8g/L)溶液0 3PV后,流出液中O126和ORS 41的质量浓度与初始质量浓度之比随累计流出体积(0 31～3 49PV)的变化趋势大体上是一致的。因此认为:在接近实际驱油过程的液固比下(1∶3～1∶4),石油羧酸盐和重烷基苯磺酸盐的色谱分离较弱,在驱油液中可大体上保持初始比例。图1表4参5。The simultaneous adsorption of petroleum carboxylates (PCs, laboratory preparate O126 and commercial chemical ICO435) and heavy alkyl benzene sulfonates (HABSs, commercial chemicals WGN and ORS-41) from mixed surfactants solutions is studied experimentally. The solutions are prepared in the purified produced water of TSD=4.3 g/L from the 4th Daqing oil production factory. In static adsorption experiments the liquid to solid ratio (LSR) in mL∶g in range 1∶8-8∶1 is taken. On a powdered artificial core, the static adsorption of O126 and WGN from O126+WGN (2.4+0.6 g/L) solution is increased with increasing LSR; introducing an electrolyte, NaOH, NaCl or Na_2CO_3, at dosage 9.0 g/L leads to enhancement in adsorption of the two surfactants meanwhile Na_2CO_3 has the most tender effect; the ratio of molar concentration (ROMS) of O126 and ORS-41 in the mixed surfactants solution without or with any electrolyte mentioned above after adsorption performed at LDT=1∶4 is generally approximate to the initial value of ROMC, 0.7971. After adsorption performed on a deoiled reservoir sand of Daqing at LSR=1∶4, the value of ROMC of ICO435 and WGN in the tested ICO435+WGN+Na_2CO_3 (5.33+0.67+10.0 g/L) solution is of 0.9063, a value close to its initial ROMC, 0.8919. In an artificial core flooding experiment, 0.3 PV of O126+ORS-41+NaOH+HPAM (0.77+0.82+12.0+1.2 g/L) flooding solution is injected and followed by 0.3 PV HPAM (0.8 g/L) solution and the changes in the ratio of mass concentration of both O126 and ORS-41 in the efflux to their initial mass concentration, C/C_0, are similar and well coincide with each other. It is concluded that the chromatographic separation of PCs and HABSs each from other appears relatively weak at the LSRs close to real ones encountered in flood practice and the proportion of the two surfactants in flooding solutions practically can be maintained unchanged in the courses of flooding

关 键 词：重烷基苯磺酸盐 石油羧酸盐 复配表面活性剂 吸附研究 驱油体系 NA2CO3 人造岩心 NaOH 初始比值 质量浓度 吸附量 液固比 混合溶液 净化污水 静态吸附 NaCl 影响程度 驱油溶液 变化趋势 驱油过程 色谱分离 工业品 电解质 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] O629.2[理学—有机化学]