The effects of selected minerals on laboratory simulated thermochemical sulfate reduction
The effects of selected minerals on laboratory simulated thermochemical sulfate reduction
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所选矿物对实验室模拟热化学硫酸盐还原的影响
DOI：
10.1016/j.orggeochem.2018.04.004
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发表时间：
2018-08
影响因子：
3
通讯作者：
Chen Zulin
中科院分区：
文献类型：
--
作者：
Xiao Qilin;Amrani Alon;Sun Yongge;He Sheng;Cai Chunfang;Liu Jinzhong;Said-Ahmad Ward;Zhu Cuishan;Chen Zulin
更好地了解储层矿物对热化学硫酸盐还原（TSR）发生的影响以及可能的机制对于石油勘探和生产至关重要。在存在和不存在蒙脱石、伊利石和石英（硅酸盐）、方解石和白云石（碳酸盐）的情况下，在360℃和50MPa下进行了一系列含水热解实验12小时、48小时和312小时。随后进行了气态化合物、C7-8 轻质烃、n-C-9+ 和有机硫化合物以及特定化合物的 Delta S-34 分析。结果表明，随着加热时间的延长或TSR的提高，n-C-9+逐渐减少，同时TSR产物、H2S、烷基苯、苯并噻吩(BTs)和二苯并噻吩(DBTs)增加。 BT和DBT的δS-34值逐渐接近MgSO4的δS-34值，并且它们的平均δS-34值之差(δS-34(BT-DBT))减小。与不含矿物质的实验相比，使用硅酸盐（特别是蒙脱石）的实验中n-C-9+含量减少，而H2S、轻质单芳烃和有机硫化合物以及较小的Delta S-34（BT-DBT）含量丰富。碳酸盐实验表明了相反的趋势。这表明硅酸盐，特别是蒙脱石，加速了 TSR 速率，而碳酸盐则降低了 TSR 速率。在实验条件下，蒙脱石内部和粘土表面的阳离子交换以及滑石沉淀可以增加H+的浓度，从而增加HSO4的浓度，然后催化生成异烷烃，异烷烃在TSR中容易被氧化。这可以减少TSR发生所需的活化能。因此，在自然环境中的硅酸盐储层和烃源岩中，TSR 可能在相对较低的温度下发生。碳酸盐溶解可以降低H+和HSO4的浓度，从而降低TSR率。这项研究证明了矿物质在调节 TSR 发生中的重要性，并表明 TSR 可以发生在自然界的硅质碎屑岩和碳酸盐岩地层中。因此，在评估不同地质背景下TSR改变的油气藏的TSR和酸性气体风险时应考虑矿物的重要性。 (C) 2018 Elsevier Ltd. 保留所有权利。
Improved understanding of the reservoir mineral effects on the occurrence of thermochemical sulfate reduction (TSR) and possible mechanisms is critical for petroleum exploration and production. A series of hydrous pyrolysis experiments were conducted with and without the presence of montmorillonite, illite and quartz (silicates), calcite and dolomite (carbonates) at 360 degrees C and 50 MPa for 12 h, 48 h and 312 h. Gaseous compounds, C7-8 light hydrocarbons, n-C-9+ and organic sulfur compounds as well as compound-specific delta S-34 analysis were conducted subsequently. The results show that with the heating time increasing or TSR advancing, n-C-9+ decrease gradually accompanied by the increases of TSR products, H2S, alkylbenzenes, benzothiophenes (BTs) and dibenzothiophenes (DBTs). The delta S-34 values of BTs and DBTs progressively approached that of MgSO4 and the difference in their average delta S-34 values (Delta S-34(BT-DBT)) decreased. Compared to experiments with the absence of minerals, the experiments with silicates, in particular montmorillonite, are depleted in n-C-9+ and enriched in H2S, light monoaromatics and organosulfur compounds and smaller Delta S-34(BT-DBT). Experiments with carbonates demonstrated the opposite trend. This indicates that silicates, in particular montmorillonite, accelerated TSR rates while carbonates reduced them. Under the experimental conditions, the exchange cations within montmorillonite and on the surface of clays and talc precipitation can increase the concentrations of H+ and hence HSO4 and then catalyze the generation of isoalkanes, which are prone to be oxidized in TSR. This can reduce the activation energy required for the occurrence of TSR. It might therefore be possible for TSR to occur at relatively low temperatures in silicate reservoirs and source rocks in natural environments. Carbonate dissolution can reduce the concentrations of H+ and HSO4, and hence reduce the TSR rates. This study demonstrates the importance of minerals in regulating the TSR occurrence and suggests that TSR can occur in siliciclasitic as well as carbonate formations in nature. Therefore, the significance of minerals should be considered in the evaluation of TSR and sour gas risk in TSR-altered hydrocarbon accumulations in different geological contexts. (C) 2018 Elsevier Ltd. All rights reserved.
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DOI：
10.1007/s11430-008-5002-4
发表时间：
2008-06
期刊：
Science in China Series D-Earth Sciences
影响因子：
--
作者：
王兆云
通讯作者：
王兆云
DOI：
10.1007/bf02547004
发表时间：
1994-07
期刊：
Journal of Thermal Analysis
影响因子：
--
作者：
T. P. Goldstein;Z. Aizenshtat
通讯作者：
T. P. Goldstein;Z. Aizenshtat
影响因子：
5.3
作者：
L. Truche;E. Bazarkina;G. Barré;E. Thomassot;G. Berger;J. Dubessy;P. Robert
通讯作者：
L. Truche;E. Bazarkina;G. Barré;E. Thomassot;G. Berger;J. Dubessy;P. Robert
DOI：
10.1016/b0-08-043751-6/07091-2
发表时间：
2003-12
期刊：
Treatise on Geochemistry
影响因子：
--
作者：
K. Milliken
通讯作者：
K. Milliken
影响因子：
3.5
作者：
W. L. Orr
通讯作者：
W. L. Orr