铀对古老烃源岩有机质生烃影响——以华北花园地区下马岭组元古界烃源岩为例

发布时间：2018-04-18 12:25

本文选题：铀 + 古老烃源岩　；参考：《东北石油大学学报》2017年02期

【摘要】：选取华北花园地区下马岭组元古界低成熟泥页岩为代表的低成熟古老烃源岩,制备成干酪根,分别在正常和含铀条件下进行高压釜黄金管生烃模拟实验,探讨铀对古老烃源岩有机质生烃的影响。结果表明:铀影响古老烃源岩有机质生烃产率和热演化,降低有机质生烃中甲烷的形成,使液态烃的生成滞后,并在成熟—过成熟阶段抑制液态烃的裂解,总烃产率不变;二氧化碳和氢气产率明显提升;含铀条件下生成的甲烷、乙烷、丙烷和二氧化碳的δ~(13)C值比正常条件的轻,铀可抑制有机质生烃的热演化,降低有机质成熟度,与铀共生的古老烃源岩生成的油气更容易保存。
[Abstract]:The low mature ancient hydrocarbon source rocks of the Lower Maling formation of the Lower Maling formation in North China were selected to produce kerogen. The hydrocarbon-generating experiments of the gold tube in the autoclave were carried out under normal and uranium-bearing conditions, respectively.The effect of uranium on hydrocarbon generation of organic matter in ancient source rocks is discussed.The results show that uranium affects the hydrocarbon generation rate and thermal evolution of organic matter in ancient source rocks, reduces the formation of methane in organic matter, lags the formation of liquid hydrocarbon, and inhibits the cracking of liquid hydrocarbon in mature-over-mature stage, and the total hydrocarbon yield remains unchanged.The yields of carbon dioxide and hydrogen increased significantly, and the 未 ~ (13) C values of methane, ethane, propane and carbon dioxide generated under uranium-containing conditions were lighter than those under normal conditions. Uranium could inhibit the thermal evolution of organic matter and reduce the maturity of organic matter.Oil and gas generated by ancient source rocks associated with uranium are easier to preserve.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油股份公司重大科技专项(2014E-32-01) 中国石油勘探开发研究院超前基础研究项目(2015yj-09)
【分类号】：P618.13

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