高分子纤维素处理油田采出水

Oilfield Produced Water Treatment by Means of Polymeric Cellulose

以棉杆为原料,通过氯乙酸和氢氧化钠的醚化反应制得羧甲基纤维素(CMC)。以CMC和聚合氯化铝(PAC)作为絮凝剂,优化了采出水的处理工艺。结果表明:40 mg/L PAC和40 mg/L CMC相复配时,处理水透光度高达96%,悬浮物含量降低99.3%、含油量下降96.5%。处理后的水质稳定,与地表水、地层水形成的混合水质澄清,对岩芯伤害低,达到碎屑岩油藏注水水质指标的要求。

Based on materials prepared from cotton stalks. The synthesis of polymer Carboxymethyl Cellulose（CMC） was done with etherification process involving use of Monochloroacetic acid and Sodium Hydroxide. The oilfield produced water treatment process was optimized when CMC and poly-aluminium Chloride PAC was considered as flocculant. The results showed that transmittance up to 96 %, suspension drop to 99.3 and oil content lost 96.5 when 40 mg/L PAC and 40 mg/L CMC were feeded. Water qualify was stable after treatment, and which reconciled surface water or formation one easily. The water had less damage on core and meets the requirement of oilfield injection waters in clastic reservoirs.