| 沉积盆地中镜质组反射率异常的物理化学环境探讨 |
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| 引用本文： | 邱楠生,汪为孝,谢明举.沉积盆地中镜质组反射率异常的物理化学环境探讨[J].地质学报,2006,80(11):1760-1769. |
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| 作者姓名： | 邱楠生 汪为孝 谢明举 |
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| 作者单位： | 1. 中国石油大学(北京)石油与天然气成藏机理教育部重点实验室,北京,102249;中国石油大学(北京)盆地与油藏研究中心,北京,102249
2. 安徽煤田地质局第一勘探队,安徽淮南,232052 |
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| 基金项目： | 国家自然科学基金(编号40342014)，中石油中青年创新基金(编号03E7011)资助成果 |
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| 摘 要： | 根据实测的压力和镜质组反射率数据讨论了沉积盆地中镜质组反射率异常的物理化学环境.认为异常压力并不是导致镜质组反射率受到抑制的唯一原因;沉积盆地中有机质镜质组反射率异常的原因除与有机质本身的性质有关外,还与其所处的温度、压力等物理环境及其周围的流体性质、无机元素(矿物)的组成等化学因素密切相关.通过对钻井异常高压带和正常压力带剖面密集取样进行的微量元素与镜质组反射率分析表明,偏酸性、低盐度的流体介质有利于有机质镜质组反射率的增加;通过分析泥岩中的某些元素丰度与镜质组反射率的对应关系,初步确定钙、锰、锶、硼、钡、磷等元素对镜质组反射率的演化有抑制作用,而铁、钴、锌、镍、铷等元素对有机质的热演化具有催化作用.本研究对于有机质成熟校正、油气资源评价和利用成熟度古温标恢复盆地热历史都具有意义.
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| 关 键 词： | 镜质组反射率 微量元素 抑制/催化作用 异常压力 |
| 修稿时间： | 2005年8月23日 |
Study on the Pyhsical and Chemical Environments of Abnormal Vitrinite Reflectance Evolution in the Sedimentary Basins |
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| QIU Nansheng,WANG Weixiao ,XIE Mingju, Key Laboratory for Hydrocarbon Accumulation Mechanism,Ministry of Education,China University of Petroleum,Beijing, Basin and Reservoir Research Center,China University of Petroleum,Beijing.Study on the Pyhsical and Chemical Environments of Abnormal Vitrinite Reflectance Evolution in the Sedimentary Basins[J].Acta Geologica Sinica,2006,80(11):1760-1769. |
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| Authors: | QIU Nansheng~ WANG Weixiao~ XIE Mingju~ Key Laboratory for Hydrocarbon Accumulation Mechanism Ministry of Education China University of Petroleum Beijing Basin and Reservoir Research Center China University of Petroleum Beijing |
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| Institution: | QIU Nansheng~,WANG Weixiao~ ,XIE Mingju~, Key Laboratory for Hydrocarbon Accumulation Mechanism,Ministry of Education,China University of Petroleum,Beijing, Basin and Reservoir Research Center,China University of Petroleum,Beijing |
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| Abstract: | Based on the tested data of pressure and vitrinite reflectance of some wells in sedimentary basin, the abnormal high pressure is not the only factor to retard the increase of vitrinite reflectance(R_o). Besides the types of the organic matter, the physical environment(temperature and pressure) and chemical environment(fluid composition and inorganic elements) will result in the abnormal vitrinite reflectance values in the sedimentary basins. This paper tested trace elements and vitrinite reflectance data from the the abnormal high pressure and normal pressure strata profiles repectively, and the contents of some kinds of trace elements in the mudstone are related well with the vitrinite reflectance values. The acidic and lower salinity starta is favorable to the increase of R_o. The typical trace elements, which may suppress and/or catalyze the vitrinite reflectance of organic matter, are determined qualitatively in this research work. The elements of Ca, Mn, Sr, B, Ba and P may result in the retardation of R_o. However, elements of Fe, Co, Zn, Ni and Rb may catalyze the organic matter maturation.This study will benefit the organic maturation correction, oil and gas assessment and thermal history reconstruction by the paleothermometry. |
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| Keywords: | vitrinite reflectance trace elecment retardation/catalysis abnormal pressure |
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