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首页> 外文期刊>Energy & fuels >Effect of Organic Matter and Thermal Maturity on Methane Adsorption Capacity on Shales from the Middle Magdalena Valley Basin in Colombia
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Effect of Organic Matter and Thermal Maturity on Methane Adsorption Capacity on Shales from the Middle Magdalena Valley Basin in Colombia

机译：有机质和热成熟度对哥伦比亚马格达莱纳河谷盆地中页岩页岩甲烷吸附能力的影响

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High-pressure methane adsorption isotherms were measured on five shale core samples obtained during exploratory drilling from three boreholes located in the Colombian Middle Magdalena Valley Basin. The experiments were carried out at 50 and 75 degrees C and for pressures ranging up to 3.5 MPa under dry conditions through the use of a homemade manometric setup. The effect of the total organic carbon (TOC) content, thermal maturity, clay content, and specific surface area (SSA) on methane adsorption capacity has been discussed. The excess adsorption data were fitted to a three-parameter (n(L), p(L) and rho(ads)) Langmuir model with the value of the adsorbed phase density, rho(ads) maintained fixed at 421 kg/m(3), which corresponds to liquid-phase density of methane at a normal boiling point. An excellent fit to the experimental data was achieved. The results show that the temperature has a negative effect on the adsorption capacity, while TOC has a positive effect, even if no linear regression was found between TOC and methane adsorption capacity. No correlation was observed between the clay content and the TOC-normalized adsorption capacity to methane, which indicates that clay minerals do not significantly contribute to methane adsorption in the case of our samples. In addition, there is not a general trend between TOC normalized and thermal maturity. Among the factors investigated in the present study, TOC has the major contribution to the adsorption uptake. A similar contribution is found for the SSA, which is consistent, considering the positive correlation between TOC and SSA. This set of data represents meaningful information for indirect estimations of the gas in place during the future recovery strategies. This study furthers the ongoing projects on the understanding of the adsorption effect on shale gas production and assessment.
机译：在从哥伦比亚马格达莱纳谷盆地中部的三个钻孔进行勘探钻探过程中获得的五个页岩岩心样品上测量了高压甲烷吸附等温线。通过使用自制的测压装置，在干燥条件下于50和75摄氏度，压力高达3.5 MPa的条件下进行了实验。讨论了总有机碳（TOC）含量，热成熟度，粘土含量和比表面积（SSA）对甲烷吸附能力的影响。将多余的吸附数据拟合为三参数（n（L），p（L）和rho（ads））Langmuir模型，其吸附相密度的值保持为421 kg / m（rh（ads））（ 3），其对应于正常沸点下甲烷的液相密度。实现了对实验数据的极佳拟合。结果表明，即使在TOC和甲烷的吸附量之间没有线性回归，温度对吸附量也有负面影响，而TOC却有正向影响。在粘土含量和TOC归一化的甲烷吸附量之间没有相关性，这表明在我们的样品中，粘土矿物对甲烷的吸附没有显着贡献。此外，TOC归一化和热成熟度之间没有一般趋势。在本研究中调查的因素中，TOC对吸附吸收有主要贡献。考虑到TOC和SSA之间的正相关性，SSA也有类似的贡献，这是一致的。这组数据代表了有意义的信息，可用于在未来的回收策略中间接估算天然气。这项研究进一步推进了有关对页岩气生产和评估吸附作用的理解的项目。

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  • 来源
    《Energy & fuels》 |2017年第11期|11698-11709|共12页
  • 作者

    Ortiz Cancino Olga Patricia; Mancilla Deneb Peredo; Pozo Manuel; Perez Edgar; Bessieres David;

  • 作者单位

    Univ Ind Santander, Bucaramanga 680002, Santander, Colombia;

    Univ Pau & Pays Adour, CNRS, Lab Fluides Complexes & Leurs Reservoirs, UMR 5150,TOTAL, F-64013 Pau, France;

    Univ Autonoma Madrid, Dept Geol & Geochem, E-28049 Madrid, Spain;

    Inst Colombiano Petr, Piedecuesta 681018, Santander, Colombia;

    Univ Pau & Pays Adour, CNRS, Lab Fluides Complexes & Leurs Reservoirs, UMR 5150,TOTAL, F-64013 Pau, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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