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首页> 外文期刊>Journal of Petroleum Science & Engineering >Oil shale paleo-productivity disturbed by sea water in a coal and oil shale bearing succession: A case study from the Paleogene Huangxian basin of Eastern China
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Oil shale paleo-productivity disturbed by sea water in a coal and oil shale bearing succession: A case study from the Paleogene Huangxian basin of Eastern China

机译：煤和油页岩承继物中海水对油页岩古生产力的影响-以中国东部古近系黄县盆地为例

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Paleo-productivity has been found to have extensive non-uniformity in the vertical sections of the oil shale layers in the coal and oil shale-bearing successions near the sea which have been disturbed by sea water. It is very important for researchers to analyze the paleo-productivity differences in order to benefit the utilization and exploitation of oil shale. There were a series of coal and oil shale-bearing successions influenced by sea water located in the Huangxian Basin of Eastern China. These include the Oil Shale 1, Coal Bed 1, and Oil Shale 2 deposits. By using sampling analysis, this study determined that Oil Shale 2 (0S2) had been influenced twice by sea water during its deposition process. Six stages were included in the 052-CB1 depositional process, which were used to build a depositional model. In the first stage, the depositional environment of the oil shale was a fresh water lake, and fresh organisms were the materials of the oil shale. The lake was determined to be a eutrophic lake. In the second stage, the paleoproductivity was down due to a transgression in the tectonic movements, and also due to the fact that the area of the eutrophic lake was shrinking. In the third stage, fresh water was the main supply once again due to the termination of the transgression, and the paleo-productivity was found to be locally increased. A mesotrophic lake lay in the areas near the sea, while a eutrophic lake was located in the middle section of the area. Also, oligotrophic lake deposits were found near the provenances. In the fourth stage, a transgression occurred in the Huangxian Basin due to the basin's subsidence, and the paleo-productivities decreased. A mesotrophic lake type was the main depositional environment in the majority of the areas. In the fifth stage, a fresh water supply was dominant. The paleo-productivities improved, and a eutrophic lake was present. In the sixth stage, a peat swamp developed within the entire basin to the stable tectonic activity. The peat swamp was preserved and coalificated to form a coal bed (CB1). This study's results allowed for the interpretation of the vertical differences in the deposits of oil shale, and the determination the mechanism of the coal and oil shale symbiosis was then possible. (C) 2016 Elsevier B.V. All rights reserved.
机译：已经发现，在近海中受海水干扰的煤和含油页岩序列中，油页岩层的垂直剖面中古生产力具有很大的不均匀性。对于研究人员来说，分析古生产力差异对促进油页岩的利用和开发非常重要。在中国东部的黄县盆地，有一系列受海水影响的煤和油页岩的演替。这些包括油页岩1，煤层1和油页岩2矿床。通过采样分析，该研究确定油页岩2（0S2）在沉积过程中受到海水的两次影响。 052-CB1沉积过程包括六个阶段，这些阶段用于建立沉积模型。在第一阶段，油页岩的沉积环境是淡水湖，新鲜生物是油页岩的物质。该湖被确定为富营养化湖泊。在第二阶段，由于构造运动的侵入，以及由于富营养化湖泊的面积在缩小，古生产力下降了。在第三阶段，由于海侵的终止，淡水再次成为主要供应，古生产力被局部提高。一个中营养湖位于附近海域，而一个富营养湖位于该区域的中部。此外，在物源附近发现了贫营养的湖泊沉积物。第四阶段，黄县盆地因沉陷而发生海侵，古生产力降低。在大多数地区，中营养型湖泊是主要的沉积环境。在第五阶段，淡水供应占主导地位。古生产力得到改善，并出现了富营养化的湖泊。在第六阶段，泥炭沼泽遍布整个盆地，形成了稳定的构造活动。保留泥炭沼泽并合并成煤床（CB1）。这项研究的结果可以解释油页岩沉积物的垂直差异，从而有可能确定煤和油页岩共生的机理。 （C）2016 Elsevier B.V.保留所有权利。

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