油田采出水中有机物组成分析

建立了油田采出水中有机物分析程序。可吸附组分用XAD系列树脂富集 ,树脂吸附物经索氏提取和KD浓缩后 ,用气相色谱 /质谱法定性分析。低级脂肪酸用紫外检测离子色谱法分析。分析了两种油田采出水 ,结果表明 :油田采出水的化学需氧量为 14 7～ 5 0 4mg/L ,其中可树脂吸附的有机物的化学需氧量占 10 .7%～ 2 5 .2 % ,低级脂肪酸占45 .3 %～ 72 .8%。可树脂吸附的有机物包括苯系物、苯酚类化合物、多环芳烃及有机酸等 ,其中苯系物及苯酚类化合物的含量相对较高。低级脂肪酸包括乙酸、丙酸、异丁酸、丁酸及异戊酸等 ,其中乙酸及丙酸的含量较高

Analysis of Organic Compounds in Oilfield Produced Water

A comprehensive an alytical procedure was developed for analyzing organic compounds in oilfield produced water.Adsorbable organic components were isolated and concentrated by XAD series resins.Adsorbed organic components were extracted by Soxhlet extractor,and concentrated by KD concentrator,then qualitatively analyzed by GC/MS.Short chain fatty acids were determined by ion chromatography with a UV detector.Two kinds of oilfield produced water samples were analyzed.The results indicated that COD of the oilfield produced water samples ranged from 147 to 504 mg/L;where COD of adsorbable organic compounds and COD of short chain fatty acids accounted for 10.7%～25.2% and 45.3%～72.8%,respectively.Adsorbable organics included aromatic hydrocarbons,phenolic compounds,PAHs,and organic acids;contents of aromatic hydrocarbons and phenolic compounds were relatively high.Detected short chain fatty acids included acetic acid,propanoic acid,butanoic acid,isobutanoic acid,and pentanoic acid;contents of acetic acid and propanoic acid were relatively high.