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我国南方碳酸盐岩地区分布着许多被破坏了的古油藏 ,原来可溶沥青或原油经过成千上亿年的风化作用 ,已变成脉状或斑点状的不可溶固体沥青。由于固体沥青的不可溶性 ,许多常规有效的方法难以进行油 源对比和进一步深入研究。作者发现原油与烃源岩之间的关系 ,类似于矿床形成过程中的矿藏与矿源 (或矿液 )之间的关系 ,矿 源对比时常用微量元素来进行。那么原油或沥青从烃源岩中运移出来时 ,会不会将烃源岩有机质中的微量元素带来呢 ?为此 ,作者尝试测量固体沥青和可能烃源岩的微量元素并结合碳同位素等分析 ,找到了固体沥青真正的源岩 ,成功地进行了研究区的古油藏成因研究。
Many carbonate reservoirs have been destroyed in the southern carbonate area of our country. The original soluble bitumen or crude oil has become veins or spots of insoluble solid bitumen after thousands of years of weathering. Due to the insolubility of solid bitumen, many conventional and effective methods make it difficult to conduct oil source comparisons and further study. The authors found that the relationship between crude oil and source rocks is similar to the relationship between mineral deposits and ore sources (or ore fluids) in the process of deposit formation. Source correlation is often performed with trace elements. So, when the crude oil or bitumen migrates from the source rock, will it bring the trace elements in the organic matter of the source rock? To do this, the author attempts to measure the trace elements in the solid bitumen and possibly source rock and combine the carbon isotope And other analysis, the real source rocks of solid bitumen were found, and the succession of the study on the genesis of paleo-oil reservoirs in the study area was carried out.