3-D numerical modelling of methane hydrate accumulations using PetroMod
3-D numerical modelling of methane hydrate accumulations using PetroMod
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DOI：
10.1016/j.marpetgeo.2015.12.019
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发表时间：
2016-03
影响因子：
4.2
通讯作者：
E. Piñero;C. Hensen;M. Haeckel;W. Rottke;T. Fuchs;K. Wallmann
中科院分区：
文献类型：
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作者：
E. Piñero;C. Hensen;M. Haeckel;W. Rottke;T. Fuchs;K. Wallmann
在德国天然气水合物倡议SUGAR内，开发了一个新的二维/三维模块，模拟有机物生物生成甲烷和天然气水合物的形成，并将其纳入石油系统建模软件包PetroMod®。通常情况下，PetroMod®模拟多种碳氢化合物组分（石油和天然气）的热生成，它们在地质地层中的迁移，最终预测合适储层中的石油和天然气聚集。我们已经扩展了PetroMod®，通过实施描述（1）天然气水合物的物理，热力学和动力学特性的算法来模拟海洋和永久冻土环境中的天然气水合物积聚;以及（2）沉积物中颗粒有机碳的微生物介导的低温降解的动力学连续模型。此外，PetroMod®的时间和空间分辨率都得到了提高，以便在数百年的时间尺度上和空间延伸的分米范围内模拟过程。为了验证新的水合物模块的能力，我们在这里提出的理论层饼模型的结果。模拟预测了天然气水合物稳定性场的空间分布和时间演化，热成因和生物成因甲烷气的生成和运移，以及其作为天然气水合物的聚集。
Within the German gas hydrate initiative SUGAR, a new 2-D/3-D module simulating the biogenic generation of methane from organic matter and the formation of gas hydrates has been developed and included in the petroleum systems modelling software package PetroMod®. Typically, PetroMod®simulates the thermogenic generation of multiple hydrocarbon components (oil and gas), their migration through geological strata, finally predicting oil and gas accumulations in suitable reservoir formations. We have extended PetroMod®to simulate gas hydrate accumulations in marine and permafrost environments by the implementation of algorithms describing (1) the physical, thermodynamic, and kinetic properties of gas hydrates; and (2) a kinetic continuum model for the microbially mediated, low temperature degradation of particulate organic carbon in sediments. Additionally, the temporal and spatial resolutions of PetroMod®were increased in order to simulate processes on time scales of hundreds of years and within decimetres of spatial extension. In order to validate the abilities of the new hydrate module, we present here results of a theoretical layer-cake model. The simulation runs predict the spatial distribution and evolution in time of the gas hydrate stability field, the generation and migration of thermogenic and biogenic methane gas, and its accumulation as gas hydrates.