| 油田卤水中短链有机酸的来源,分布及其地球化学意义 |
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| 引用本文： | 马亭,梅博文.油田卤水中短链有机酸的来源,分布及其地球化学意义[J].地质科技情报,1993,12(3):73-77. |
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| 作者姓名： | 马亭 梅博文 |
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| 作者单位： | 江汉石油学院分析测试研究中心 434102
(马亭，梅博文，柳常青，陈传平)，中南民族学院 武汉430073(成凤桂) |
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| 摘 要： | 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。
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| 关 键 词： | 有机酸 地球化学 石油勘探 油层水 |
ORIGIN, DISTRIBUTION AND GEOCHEMISTRY SIG-NIFICANE OF SHORT-CHAIN ORGANIC ACID ANIONS IN OIL-FIELD BRINE |
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| Ma Ting,Mei Bowen,Liu Changqing.ORIGIN, DISTRIBUTION AND GEOCHEMISTRY SIG-NIFICANE OF SHORT-CHAIN ORGANIC ACID ANIONS IN OIL-FIELD BRINE[J].Geological Science and Technology Information,1993,12(3):73-77. |
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| Authors: | Ma Ting Mei Bowen Liu Changqing |
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| Abstract: | Short-chain organic acid anions are present in high concenrtations in almost all oilfield brine. The acetate is generally the most dominant organic acid anions. A large number of the simulant experiments indicate that kergon is the most likely precusors of short-chain or-ganic acids. In oil-field brine, short-chain organic acid anions can play an important geochemistry roles. (1)They can be use as proximity indicators in petroleum exploration. (2)they may be precursors for an important portion of natural gas. (3)They can dominate the total alkalinity of brine, thus, control the pH and buffer capacity of oil-field brine. (4)Theybehave as reducing agents controlling the oxidation state (Eh) of brine and the concentration of multi-valent elements. (5)Experiments show that they can also form soluble complexes with inorganic ions (e.g. Al,Ca, Si, et al.) in reservior rock, thus enchancing the solution of feldspar mineral and the secondary porosity of sandstone reservior. |
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| Keywords: | short-chain organic acid anions geochemistry roles petroleum exploration |
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