油田卤水中短链有机酸的来源、分布及其地球化学意义ORIGIN, DISTRIBUTION AND GEOCHEMISTRY SIG-NIFICANE OF SHORT-CHAIN ORGANIC ACID ANIONS IN OIL-FIELD BRINE
马亭,梅博文,柳常青,陈传平,成凤桂
摘要(Abstract)：
在几乎所有的油田卤水(地层水)中都含有高浓度的短链有机酸,通常乙酸根是其中最丰富的有机阴离子。大量的模拟实验表明干酪根是有机酸最主要的来源。短链有机酸有着重要的地球化学意义,(1)可以作为石油勘探的近似指示物,(2)它们可能是天然气中某些主要成分的母体,(3)它们是地层水中最主要的弱酸阴离子,因此控制了地层水的pH值的缓冲能力,(4)作为还原剂,它们控制了地层水的Eh值和多价元素的浓度,(5)实验表明,它们还能够与储集岩中的铝、钙、硅等无机离子形成可溶络合物,使长石类矿物的溶解作用增强,从而导致砂岩储层中次生孔隙加大。
关键词(KeyWords)： 短链有机酸;地球化学意义;石油勘探
基金项目(Foundation):
作者(Author): 马亭,梅博文,柳常青,陈传平,成凤桂
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