石油勘探与开发
石油勘探與開髮
석유감탐여개발
PETROLEUM EXPLORATION AND DEVELOPMENT
2010年
1期
121-128
,共8页
王培荣%徐冠军%张大江%肖廷荣%任冬苓
王培榮%徐冠軍%張大江%肖廷榮%任鼕苓
왕배영%서관군%장대강%초정영%임동령
轻烃%正庚烷值%异庚烷值%成熟度参数%次生蚀变%混源油
輕烴%正庚烷值%異庚烷值%成熟度參數%次生蝕變%混源油
경경%정경완치%이경완치%성숙도삼수%차생식변%혼원유
light hydrocarbon%heptane value%isoheptane value%maturity parameter%secondary alteration%mixed source oil
用采自中国国内25个油区的772个原油轻烃分析数据,结合其中338个样品的饱和烃GC/MS分析数据,就原油正、异庚烷值与烃源岩干酪根类型的关系以及与C_(29)甾20S/(20S+20R)成熟度参数的相关性,对影响参数值发生异常变化的因素等作了研讨.研究认为,正、异庚烷值确实与母源干酪根类型有关,但相关关系与Thompson的图版有所差别,研究中国陆相原油时不宜直接引用;原油次生蚀变和混源是使原油正、异庚烷值发生异常变化的重要因素.在用正、异庚烷值作研究时必须备加注意;正、异庚烷值标示原油成熟度的范围大干C_(29)甾20S/(20S+20R)所能标示的;落入Thompson图版"Biodegraded"区域的油样可能有3类:原生的未熟油,已遭蚀变的原油和成熟度不同的混源油,对于未落入该区域内的生物降解油,认为油藏存在二次注入的可能性.图6表2参26
用採自中國國內25箇油區的772箇原油輕烴分析數據,結閤其中338箇樣品的飽和烴GC/MS分析數據,就原油正、異庚烷值與烴源巖榦酪根類型的關繫以及與C_(29)甾20S/(20S+20R)成熟度參數的相關性,對影響參數值髮生異常變化的因素等作瞭研討.研究認為,正、異庚烷值確實與母源榦酪根類型有關,但相關關繫與Thompson的圖版有所差彆,研究中國陸相原油時不宜直接引用;原油次生蝕變和混源是使原油正、異庚烷值髮生異常變化的重要因素.在用正、異庚烷值作研究時必鬚備加註意;正、異庚烷值標示原油成熟度的範圍大榦C_(29)甾20S/(20S+20R)所能標示的;落入Thompson圖版"Biodegraded"區域的油樣可能有3類:原生的未熟油,已遭蝕變的原油和成熟度不同的混源油,對于未落入該區域內的生物降解油,認為油藏存在二次註入的可能性.圖6錶2參26
용채자중국국내25개유구적772개원유경경분석수거,결합기중338개양품적포화경GC/MS분석수거,취원유정、이경완치여경원암간락근류형적관계이급여C_(29)치20S/(20S+20R)성숙도삼수적상관성,대영향삼수치발생이상변화적인소등작료연토.연구인위,정、이경완치학실여모원간락근류형유관,단상관관계여Thompson적도판유소차별,연구중국륙상원유시불의직접인용;원유차생식변화혼원시사원유정、이경완치발생이상변화적중요인소.재용정、이경완치작연구시필수비가주의;정、이경완치표시원유성숙도적범위대간C_(29)치20S/(20S+20R)소능표시적;락입Thompson도판"Biodegraded"구역적유양가능유3류:원생적미숙유,이조식변적원유화성숙도불동적혼원유,대우미락입해구역내적생물강해유,인위유장존재이차주입적가능성.도6표2삼26
The data of light hydrocarbon from 772 oil samples in 25 oilfields,with GC/MS data from 338 saturated hydrocarbon samples were used to discuss the relationship among kerogen type,heptane value,isoheptane value and C_(29) sterane 20S/(20S+20R)ratio.The effect factors for the abnormal change of these parameters were studied.Although the heptane value and isoheptane value are related to kerogen type,the correlation is different from that in Thompson figure,sothe correlation in the figure can not be directly used in research of land facies oil in China.Consideration should be taken when using the heptane value and isoheptane value because the secondary alteration and mixture of oil source are the main factors leading to the abnormal change of the heptane value and isoheptane value.The heptane and isoheptane values have larger maturity range than that of C_(29) sterane 20S/(20S+20R).There are three types of oil samples(original immature oil,alteration oil and mixed source oil with different maturity) that may fall into the"Biodegradation"area of the Thompson figure.For the biodegraded oil out of the Thompson figure,the reservoir may have secondary inj ection possibility.