The Change of Crude Oil Components in Different Production Stages

CHEN Zu-lin; ZHU Yang-ming; CHEN Qi

Crude oils in different production stages are analyzed by organic geochemical technology. The oils from Donghe,Tazhong and Lunnan oil field in Tarim basin are collected from different stages in the process of production. In addition, the variation rule of crude oil components is studied and the internal relations between crude oil components and production stages are also investigated. The experiment results indicate that the saturate/aromatics ratio show decreasing trend with production; There is a direct relationship between saturate and NSO + asphaltene with production. The carbon number range or the peak carbon number of normal alkanes in crude oils shift backuard and the light/heavy hydrocarbons ratio show decreasing trendtion.During oil recovery,polar components including various heteroatom-bearing functional groups with basic or acidic property tend to reduce in crude oil Therefore, this investigation has practice significance in researching expelled mechanics from microcosmic points of view, evaluating wetting alteration in crude oils and increasing production ratio of crude oils.

Jianghan Petroleum Institute Jingzhou Hubei,434102

Received Date: 2000-12-04

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Abstract: Crude oils in different production stages are analyzed by organic geochemical technology. The oils from Donghe,Tazhong and Lunnan oil field in Tarim basin are collected from different stages in the process of production. In addition, the variation rule of crude oil components is studied and the internal relations between crude oil components and production stages are also investigated. The experiment results indicate that the saturate/aromatics ratio show decreasing trend with production; There is a direct relationship between saturate and NSO + asphaltene with production. The carbon number range or the peak carbon number of normal alkanes in crude oils shift backuard and the light/heavy hydrocarbons ratio show decreasing trendtion.During oil recovery,polar components including various heteroatom-bearing functional groups with basic or acidic property tend to reduce in crude oil Therefore, this investigation has practice significance in researching expelled mechanics from microcosmic points of view, evaluating wetting alteration in crude oils and increasing production ratio of crude oils.

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Reference (6)

[1]	王玉侠译.在石油渗透过程的模拟中单芳烃和双芳烃组分的变化[C].地质科学译丛 1995,12(4):44～47
[2]	Skauge A,Standal S,Boe S O,Skauge T,et al.Effects of organic acids and bases and oil composition on wettablity.SPE 56 673:103～111
[3]	刘小艳,李宜强,冯子辉等.不同采出程度下石油组分变化特征[J].沉积学报,2000,18(2):324～326
[4]	Maowen Li,Huanxin Yao,Stasiuk L D,et al.Effect of maturity and petroleum expulsion on pyrrolic nitrogen compound yields and distribution in Duvernay Formation petroleum source rocks in central Alberta,Canada[J].Organic Geochemistry.1997,28:731～745
[5]	Buckley J S,Liu Y,Xie X.Asphaltenes and crude oil wetting -The effect of oil composition[C].SPE 35366:205～220
[6]	Maowen Li,Larter S R.Interactions of organic nitrogen species with mineral water and organic networks:Implications to petroleum geochemistry.205th American Chemical Society Meeting.Division of Geochemistry,American Chemical Society,Abstract Paper 89,1993

[1]	王玉侠译.在石油渗透过程的模拟中单芳烃和双芳烃组分的变化[C].地质科学译丛 1995,12(4):44～47
[2]	Skauge A,Standal S,Boe S O,Skauge T,et al.Effects of organic acids and bases and oil composition on wettablity.SPE 56 673:103～111
[3]	刘小艳,李宜强,冯子辉等.不同采出程度下石油组分变化特征[J].沉积学报,2000,18(2):324～326
[4]	Maowen Li,Huanxin Yao,Stasiuk L D,et al.Effect of maturity and petroleum expulsion on pyrrolic nitrogen compound yields and distribution in Duvernay Formation petroleum source rocks in central Alberta,Canada[J].Organic Geochemistry.1997,28:731～745
[5]	Buckley J S,Liu Y,Xie X.Asphaltenes and crude oil wetting -The effect of oil composition[C].SPE 35366:205～220
[6]	Maowen Li,Larter S R.Interactions of organic nitrogen species with mineral water and organic networks:Implications to petroleum geochemistry.205th American Chemical Society Meeting.Division of Geochemistry,American Chemical Society,Abstract Paper 89,1993

The Change of Crude Oil Components in Different Production Stages

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