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首页> 外文学位 >ORGANIC GEOCHEMISTRY AND ORIGIN OF THE HEAVY OILS IN THE EASTERN VENEZUELAN BASIN (HYDROUS-PYROLYSIS, ASPHALTENES, PETROLEUM, BIOMARTIERS).
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ORGANIC GEOCHEMISTRY AND ORIGIN OF THE HEAVY OILS IN THE EASTERN VENEZUELAN BASIN (HYDROUS-PYROLYSIS, ASPHALTENES, PETROLEUM, BIOMARTIERS).

机译：委内瑞拉东部盆地（水热解，沥青质，石油，生物材料）的重油的有机地球化学和起源。

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摘要

The Eastern Venezuelan Basin, located in the central and eastern part of Venezuela, is considered to be a repository for one of the major oil deposits of the world. One section of the basin, the Orinoco Petroleum Belt (OPB), contains large deposits of heavy and superheavy oils reservoired in Oligocene-Miocene and Cretaceous strata. However, the origin of the heavy oils in the Orinoco Petroleum Belt has not yet been clearly ascertained. Computerized GC/MS studies of the distribution and relative abundance of biological markers (steranes and triterpanes) has established new evidence suggesting that both conventional and heavy oils from the OPB have originated from the same source rock. The results of gas-liquid chromatography, ('1)H and ('13)C NMR spectroscopy, infrared spectroscopy and elemental analysis indicate that heavy and superheavy oils from the OPB have been subjected to moderate thermal maturation as well as to different degrees of microbial alteration. Simulated microbial degradation of conventional (paraffinic-naphthenic) oils from the basin suggests that the heavy oils from the OPB are the result of microbial degradation.; Hydrous pyrolysis, a new method used for the first time in the study of asphaltenes from biodegraded oils, has led to the establishment of new criteria for oil-oil correlations. The hydrous pyrolysis results show that asphaltenes are potential generators of moderate quantities of materials similar to petroleum, containing n-paraffins, isoprenoids, steranes and triterpanes. Similarities among saturated hydrocarbon distributions were used to establish genetic associations among the biodegraded oils. Comparison of the distribution of the hydrocarbons in the pyrolyzates and conventional oils from the study area, indicates that a bulk of the heavy oils in the Orinoco Petroleum Belt (southern region of Anzoategui and Monagas states) may have originated from Cretaceous rocks.
机译：委内瑞拉东部盆地位于委内瑞拉的中部和东部，被认为是世界主要石油储藏之一的储藏库。盆地的一部分是奥里诺科石油带（OPB），其中含有大量沉积在渐新世-中新世和白垩纪地层的重，超重油。但是，尚未明确确定奥里诺科石油带中重油的来源。关于生物标志物（甾烷和三萜烷）的分布和相对丰度的计算机化GC / MS研究已经建立了新的证据，表明来自OPB的常规油和重油均源自同一烃源岩。气液色谱，（'1）H和（'13）C NMR光谱，红外光谱和元素分析的结果表明，来自OPB的重油和超重油已经经历了适度的热成熟以及不同程度的微生物改变。对盆地中常规（链烷烃-环烷烃）油进行的微生物降解模拟表明，OPB中的重油是微生物降解的结果。含水热解是一种首次用于研究生物降解油中的沥青质的新方法，从而为油-油相关性建立了新的标准。含水的热解结果表明，沥青质是潜在的中量物质，类似于石油，含有正链烷烃，类异戊二烯，甾烷和三萜烷。饱和烃分布之间的相似性用于建立生物降解油之间的遗传关联。比较研究区的热解产物和常规油中烃的分布，结果表明，奥里诺科石油带（安索阿特吉南部和莫纳加斯州南部）的大部分重油可能起源于白垩纪岩石。

著录项

  • 作者

    GALARRAGA, FEDERICO ANTONIO.;

  • 作者单位

    University of Maryland College Park.;

  • 授予单位 University of Maryland College Park.;
  • 学科 Geochemistry.
  • 学位 Ph.D.
  • 年度 1986
  • 页码 364 p.
  • 总页数 364
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;
  • 关键词

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