TSR promotes the formation of oil-cracking gases: Evidence from simulation experiments
TSR promotes the formation of oil-cracking gases: Evidence from simulation experiments
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TSR 促进石油裂解气的形成：来自模拟实验的证据
DOI：
10.1007/s11430-008-0009-4
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
Zhang ShuiChang
中科院分区：
文献类型：
--
作者：
Shuai YanHua;Zhu GuangYou;Zhang ShuiChang
TSR是硫酸盐和碳氢化合物之间的相互作用，广泛存在于碳酸盐岩储层中。由于这一过程会产生大量的硫化氢等有毒酸性气体，近年来引起了人们的严重关注。本文报道了用受限金管系统模拟不同矿物与烃类流体在不同温度和时间下的相互作用的实验。结果表明，引发TSR的主要矿物是硫酸镁，在反应体系中加入一定量的氯化钠也能促进TSR，生成较多的H_2S。TSR产生的硫化氢是原油持续氧化降解的重要诱因。例如，受TSR影响的石油裂解气产率是未受TSR影响的两倍，而受TSR影响的甲烷的产率甚至更高，最高可达未受TSR影响的3倍。湿气体的碳同位素也变得更重。这说明TSR明显促进了原油的氧化降解，加快了气态烃的生成，增加了天然气的干度。对这一过程的研究对于认识TSR机制和海相地层天然气生成机制具有重要意义。
TSR is an interaction between sulfate and hydrocarbons, occurring widely in carbonate reservoirs. Because this process can produce a large amount of noxious acidic gases like H2S, it has drawn serious concern recently. This paper reports an experiment that simulated an interaction between different minerals and hydrocarbon fluids under different temperature and time using a confined gold-tube system. The results showed that the main mineral that initiates TSR is MgSO4, and adding a certain amount of NaCl into the reactive system can also promote TSR and yield more H2S. The H2S produced in TSR is an important incentive for the continuous oxidative degradation of crude oils. For instance, the yield of oil-cracking gases affected by TSR was twice of that not affected by TSR while the yield of TSR-affected methane was even higher, up to three times of that unaffected by TSR. The carbon isotopes of wet gases also became heavier. All of the above illustrated that TSR obviously motivates the oxidative degradation of crude oils, which makes the gaseous hydrocarbon generation sooner and increases the gas dryness as well. The study on this process is important for understanding the TSR mechanism and the mechanism of natural gas generation in marine strata.
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