Combining reactive transport modeling with geochemical observations to estimate the natural gas hydrate accumulation
Combining reactive transport modeling with geochemical observations to estimate the natural gas hydrate accumulation
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将反应输运模型与地球化学观测相结合来估计天然气水合物的积累
DOI：
10.1016/j.apenergy.2020.115362
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发表时间：
2020-10
期刊：
影响因子：
11.2
通讯作者：
Shang Songhua
中科院分区：
文献类型：
--
作者：
Tian Hailong;Yu Ceting;Xu Tianfu;Liu Changling;Jia Wei;Li Yuanping;Shang Songhua
预测天然气水合物的分布和资源量，了解天然气水合物的形成机理，是评价天然气水合物勘探潜力和开发利用天然气水合物的关键。本研究的目的是提供一个便携式的解决方案，评估天然气水合物的资源和量化的甲烷来源的贡献，通过数值模拟的特定网站的数据约束。为了对生物产甲烷的复杂过程进行数值模拟，将有机质的反应输运、生物降解和沉积与水合物生成系统的行为耦合起来，开发了TOUGH+ Hyperion + React（坚韧+ HR）集成模拟软件包.基于南海SH 2站的实测资料，建立了一维柱状生长模式，并利用开发的坚韧+ HR工具进行了数值模拟。结果表明，当考虑生物甲烷为水合物的唯一来源时，模拟的水合物最大饱和度为~ 0.19，远低于观测值（~ 0.46），表明原位生物甲烷不足以形成高饱和度的水合物。当甲烷上升通量增加到1.00× 10− 11 k g· m-2· s-1时，模拟的水合物饱和度和水合物分布与实测数据吻合较好，包括残留有机碳（TOC）剖面、溶解甲烷与硫酸盐界面（SMI）位置以及由此得到的氯度。模拟结果表明，形成水合物的生物甲烷与热成因甲烷的比例约为1：3。利用柱状模型预测的甲烷水合物生成量为3258.33 kg，与现场观测值（3112.82 kg）非常接近。
Predicting the distribution and resource of gas hydrates and understanding gas hydrate forming mechanisms are critical for assessing natural gas hydrate exploration potential, as well as exploiting hydrates. This study aims to provide a portable solution for evaluating resource of natural gas hydrate and quantifying contribution of methane sources via numerical simulations constrained by site-specific data. To numerically describe the complex process of biogenic methane production, an integrated simulation package, TOUGH+ Hydrate+ React (TOUGH+ HR), was developed by coupling reactive transport, biodegradation and deposition of organic matter with behavior of hydrate-bearing system. Based on observed data from site SH2 in the South China Sea, a growing one-dimensional column model was constructed, and simulated via the developed TOUGH+ HR tool. The results showed that when considering biogenic methane was the only source for hydrate, simulated maximum saturation of hydrate reached~ 0.19, which is much lower than the observed value (~ 0.46), suggesting that the in-situ biogenic methane is not enough to form the high-saturation hydrate. When the upward flux of methane (considered as thermogenic methane) increased to 1.00× 10− 11 k g· m-2· s-1, both simulated saturation and distribution of hydrates matched the observed data well, including the profile of remained total organic carbon (TOC), the location of interface between dissolved methane and sulfate (SMI), and the derived chlorinity. Simulation results suggest that the ratio of biogenic methane to thermogenic methane forming hydrates was about 1: 3. Predicted amount of methane hydrate using the column model was 3258.33 kg, very close to the estimated based on field observation (3112.82 kg).
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影响因子：
56.9
作者：
D. Stolper;M. Lawson;C. Davis;Alexandre A. Ferreira;E. Neto;Geoffrey S. Ellis;M. Lewan;A. Martini-A.-Mart
通讯作者：
D. Stolper;M. Lawson;C. Davis;Alexandre A. Ferreira;E. Neto;Geoffrey S. Ellis;M. Lewan;A. Martini-A.-Mart
影响因子：
4.2
作者：
E. Piñero;C. Hensen;M. Haeckel;W. Rottke;T. Fuchs;K. Wallmann
通讯作者：
E. Piñero;C. Hensen;M. Haeckel;W. Rottke;T. Fuchs;K. Wallmann
影响因子：
5
作者：
A. Milkov;G. Claypool;Youngjoo Lee;R. Sassen
通讯作者：
A. Milkov;G. Claypool;Youngjoo Lee;R. Sassen
DOI：
10.4043/20485-ms
发表时间：
2010
期刊：
--
影响因子：
--
作者：
N. Wu;Shengxiong Yang;Haiqi Zhang;Jinqiang Liang;Hongbin Wang;Jing’an Lu
通讯作者：
N. Wu;Shengxiong Yang;Haiqi Zhang;Jinqiang Liang;Hongbin Wang;Jing’an Lu
影响因子：
--
作者：
Zhenyuan Yin;Z. Chong;H. K. Tan;Praveen Linga
通讯作者：
Zhenyuan Yin;Z. Chong;H. K. Tan;Praveen Linga