摘要
原油的化学组成是影响油水界面张力的决定因素。选择长6油藏不同油井原油样品，通过现代仪器分析手段，从分子水平详细研究原油化学组成及分子结构特征。结果表明，20个长6油藏原油样品组成非常接近。原油中烷烃为主要成分，正构烷烃含量远高于其他烃类化合物，轻烃（C8前）含量丰富，芳烃组分含量较低。长6油藏原油中羧酸类化合物含量很低，以脂肪酸为主，酚类化合物是主要的酸性化合物。
The chemical components of crude oil are the deciding factors ＇affecting the interracial tension of oil/water. Choose crude oil samples from different wells in Chang6 reservoirs. Proceeding from the molecular level, a detailed study of the chemical composition and structural characteristics of the crude molecule has been conducted by means of modern instrumental analysis. The results show that the composition of 20 oil samples from Chang6 reservoirs is very similar. Alkanes in crude oil as the main ingredient, and the n-paraffin contents are far higher than those of other hydrocarbons. The contents of light hydrocarbons （ before C8 ） are high, while the contents of aromatic components are low. Contents of carboxylic acid compounds are very low in crude oil from Chang6 reservoirs, with fatty acid remaining dominant, and phenolic compounds as the main acidic compounds.
关键词
原油组分
表面活性剂
界面张力
石油酸
crude oil component
suffactant
interracial tension
oil acid
