辽河油田齐40块蒸汽驱二氧化碳成因分析
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TE357.7

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国家科技重大专项“大型油气田及煤层气开发”子课题“辽河、新疆稠油/超稠油开发技术示范工程”(2016ZX05055)


Analysis of the origin of carbon dioxide from steam flooding in Block Qi-40 of Liaohe Oilfield
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    摘要:

    渤海湾盆地辽河油田欢喜岭地区齐40块稠油油藏历经多年的蒸汽驱开发,其伴生气体中CO2含量已上升至60~90%之间。通过对该区块的油藏条件及开发前后的储层流体矿物分析,认为CO2浓度的上升主要由于蒸汽驱开发导致油藏温度升高,储层流体和矿物发生化学反应结果,其中与CO2形成有关的化学反应包括:稠油水裂解、硫酸盐热还原、矿物碳酸盐的分解与转化。室内模拟实验结果结合现场伴生气体的δ13CCO2值(+1.7‰~+6.6‰)证实了CO2 主要来源为碳酸盐岩的分解。

    Abstract:

    After years of steam flooding exploitation, the CO2 content in the associated gas of Heavy Oil Reservoir Block Qi-40 in the Huanxiling area of Liaohe Oilfield in the Bohai Bay Basin has grown to 60–90 percent. According to the analysis of the block’s reservoir conditions and the minerals of reservoir fluid before and after exploitation, it is concluded that the higher CO2 content is mainly arisen from the chemical reactions of the reservoir fluid and its minerals, due to the rising reservoir temperature caused by the steam flooding exploitation. Those chemical reactions related to the higher CO2 content include the heavy oil aquathermolysis, thermochemical sulfate reduction (TSR), as well as the decomposition and conversion of mineral carbonate. Both the results of laboratory simulation experiments and the value of δ13CCO2 from +1.7‰ to +6.6‰ of the field associated gas confirm that the more CO2 mainly comes from the decomposition of carbonate rocks.

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闫红星,杨俊印,刘家林,等. 辽河油田齐40块蒸汽驱二氧化碳成因分析[J]. 科学技术与工程, 2021, 21(22): 9337-9342.
Yan Hongxing, Yang Junyin, Liu Jialin, et al. Analysis of the origin of carbon dioxide from steam flooding in Block Qi-40 of Liaohe Oilfield[J]. Science Technology and Engineering,2021,21(22):9337-9342.

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  • 收稿日期:2021-01-12
  • 最后修改日期:2021-06-09
  • 录用日期:2021-04-08
  • 在线发布日期: 2021-08-29
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