西湖凹陷平湖斜坡带原油轻烃地球化学特征
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摘要
通过对西湖凹陷平湖斜坡带的12个原油样品中轻烃分布及组成特征进行分析,结果表明:原油的轻烃馏分组成中甲苯、甲基环己烷指数高,石蜡指数低;原油发生蒸发分馏作用其程度大体相当于Thompson的5~7次充注观察值;C7化合物组成特征和甲基环己烷指数均指示原油母质来源于腐殖型有机质;Mango轻烃参数K1基本符合轻烃稳定态催化动力学轻烃成因模式;轻烃组分中的庚烷和异庚烷指数因蒸发分馏作用而出现成熟度偏低的假象,原油形成温度在124~131℃之间。
The distribution and characteristics of light hydrocarbon for 12 crude oil samples in the Pinghu Slope of Xihu Sag were studied.The results show that in the light hydrocarbon in crude oil fractions of high abundance of toluene,methyl-cyclohexane in high paraffin index is low.The evaporation fraction of the crude oil is roughly equivalent to the degree of Thompson 5~7times of filling observation value.The characteristics of C7 compounds and methyl-hexane index indicate that crude oil is from parent material of humic type organic matter.Mango light hydrocarbon parameter K1 value is in line with the formation mode of steady-state light hydrocarbon catalytic kinetic light hydrocarbon.Light hydrocarbon components heptane value and isoheptane index present low maturity of illusion of evaporation fractionation effect,crude oil formation temperature is between 124~131℃.
The distribution and characteristics of light hydrocarbon for 12 crude oil samples in the Pinghu Slope of Xihu Sag were studied.The results show that in the light hydrocarbon in crude oil fractions of high abundance of toluene,methyl-cyclohexane in high paraffin index is low.The evaporation fraction of the crude oil is roughly equivalent to the degree of Thompson 5~7times of filling observation value.The characteristics of C7 compounds and methyl-hexane index indicate that crude oil is from parent material of humic type organic matter.Mango light hydrocarbon parameter K1 value is in line with the formation mode of steady-state light hydrocarbon catalytic kinetic light hydrocarbon.Light hydrocarbon components heptane value and isoheptane index present low maturity of illusion of evaporation fractionation effect,crude oil formation temperature is between 124~131℃.
引文
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[10]王培荣,徐冠军,张大江,等.常用轻烃参数正、异庚烷值应用中的问题[J].石油勘探与开发,2010,37(1):121~128.
[11]张敏,张俊,张春明.塔里木盆地原油轻烃地球化学特征[J].地球化学,1999,28(2):191~195
[12]张春明.石油中轻烃的成因及其应用[J].石油天然气学报(江汉石油学院学报),2005,27(2):146~148.
[13]朱扬明.油气生成温度计算及其在勘探中的应用[J].石油实验地质,2000,22(2):167~171
[14]Mango F D.An invariance in the isoheptanes of petroleum[J].Science,1987,237:514~517.
[15]Mango F D.The origin of light hydrocarbonsin petroleum:A kinetic test of the steady-state catalytic hypothesis[J].Geochimica et Cosmochimica Acta,1990,54(3):23~27
[16]唐友军,文志刚,窦立荣,等.一种估算原油成熟度的新方法[J].天然气地球科学,2006,17(2):160~162.
[2]Hunt J M.Generation and migration of light hydrocarbons[J].Science,1984,226:1265~1270.
[3]朱扬明,张春明.Mango轻烃参数在塔里木原油分类中的应用[J].地质勘探,1999,28(1):26~33.
[4]侯读杰,冯子辉.油气地球化学[M].北京:石油工业出版社,2011.82~87.
[5]傅宁,李友川,陈桂华,等.东海西湖凹陷油气“蒸发分馏”成藏机制[J].石油勘探与开发,2003,30(2):39~42
[6]胡惕麟,戈葆雄,张义纲,等.源岩吸附烃和天然气轻烃指纹参数的开发和应用[J].石油实验地质,1990,12(4):375~393.
[7]王培荣,张大江.江汉盆地原油轻烃的地球化学特征[J].石油勘探与开发,2005,32(3):45~47.
[8]程克明,金伟明,何忠华,等.陆相原油及凝析油的轻烃单体组成特征及地质意义[J].石油勘探与开发,1987,14(1):34~43.
[9]苏奥,陈红汉,王存武,等.东海盆地西湖凹陷油气成因及成熟度判别[J].石油勘探与开发,2013,40(5):521~527.
[10]王培荣,徐冠军,张大江,等.常用轻烃参数正、异庚烷值应用中的问题[J].石油勘探与开发,2010,37(1):121~128.
[11]张敏,张俊,张春明.塔里木盆地原油轻烃地球化学特征[J].地球化学,1999,28(2):191~195
[12]张春明.石油中轻烃的成因及其应用[J].石油天然气学报(江汉石油学院学报),2005,27(2):146~148.
[13]朱扬明.油气生成温度计算及其在勘探中的应用[J].石油实验地质,2000,22(2):167~171
[14]Mango F D.An invariance in the isoheptanes of petroleum[J].Science,1987,237:514~517.
[15]Mango F D.The origin of light hydrocarbonsin petroleum:A kinetic test of the steady-state catalytic hypothesis[J].Geochimica et Cosmochimica Acta,1990,54(3):23~27
[16]唐友军,文志刚,窦立荣,等.一种估算原油成熟度的新方法[J].天然气地球科学,2006,17(2):160~162.