塔里木盆地塔河油田奥陶系原油成熟度及裂解程度研究

发布时间：2018-03-08 13:01

本文选题：金刚烷　切入点：单金刚烷　出处：《天然气地球科学》2017年02期 　论文类型：期刊论文

【摘要】：使用生物标志化合物成熟度参数、芳烃成熟度参数和金刚烷成熟度参数对塔里木盆地塔河油田奥陶系原油成熟度进行了研究,Ts/(Ts+Tm)、C_(29)Ts/(C_(29)H+C_(29)Ts)成熟度参数表明奥陶系原油基本上未达到凝析油阶段,这与芳烃甲基菲成熟度参数所反映的成熟度基本相同,而金刚烷指数MAI、MDI反映的成熟度约为1.1%~1.6%,高于生物标志化合物及甲基菲指数所反映的成熟度,成熟度的差异性反映了奥陶系原油经历了多期油气充注。原油金刚烷绝对定量分析表明甲基双金刚烷含量在Ts/(Ts+Tm)0.55之前分布较为离散,增加缓慢,而在Ts/(Ts+Tm)0.55之后增加迅速,对塔河油田不同层位原油金刚烷含量分析表明,塔河油田原油金刚烷基线应在15×10~(-6),总体而言,绝大多数奥陶系原油甲基双金刚烷含量分布在(4~35)×10(-6)之间,原油裂解程度基本上小于50%,表明塔河油田奥陶系深层仍具有石油勘探前景。奥陶系原油甲基双金刚烷含量呈现东高西低、南高北低的特点,指示了塔河油田奥陶系原油存在由东向西、由南向北运移的特点,与原油密度、成熟度参数反映的运移方向一致。
[Abstract]:Using biomarker maturity parameters, The maturity of Ordovician crude oil in Tahe Oilfield, Tarim Basin, has been studied by aromatics maturity parameter and adamantane maturity parameter. The maturity parameters of Ordovician crude oil show that the maturity parameters of Ordovician crude oil have not basically reached the condensate stage. This is basically the same as the maturity reflected by the maturity parameter of aromatic methyl phenanthrene, while the maturity reflected by MAIMAI MDI is about 1.1% 1.6, which is higher than that reflected by the biomarker and methyl phenanthrene index. The difference of maturity reflects that the petroleum of Ordovician has experienced many stages of oil and gas filling. Absolute quantitative analysis of adamantane in crude oil shows that the content of methyl bisamantane is dispersed and increases slowly before Ts/(Ts Tm)0.55, but increases rapidly after Ts/(Ts Tm)0.55. The analysis of the content of adamantane in different layers of Tahe oil field shows that the base line of adamantane in Tahe oilfield should be 15 脳 10 ~ (-6). In general, the content of methyl bisamantane in most Ordovician crude oil is between 435) 脳 10 ~ (-6). The degree of cracking of crude oil is basically less than 50, indicating that the deep layer of Ordovician in Tahe Oilfield still has the prospect of oil exploration. The content of methyl bisamantane in Ordovician crude oil shows the characteristics of low in east high and west, high in south and low in north and south. The characteristics of the migration of Ordovician crude oil from east to west and from south to north in Tahe Oilfield are indicated, which are consistent with the migration direction reflected by the crude oil density and maturity parameters.
【作者单位】：中国石油化工股份有限公司石油勘探开发研究院;长江大学资源与环境学院;
【基金】：中国石化科技部项目(编号:P07021;G5800-16-ZS-KJB009) 国家重点基础发展规划“973”项目(编号:2012CB21480) 国家油气重大专项(编号:2011ZX05005)联合资助
【分类号】：P618.13

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