【摘要】 碳酸盐岩地层中干酪根热降解生成的气态烃与硫酸盐接触后发生热化学还原反应,使气态烃消失,这可能是造成天然气保存死亡线的主要原因之一。对热化学还原反应的最低反应温度、反应物与产物、反应机理、反应动力学等进行了总结与评述。研究表明,热化学还原反应最低反应温度主要集中在100～180℃;气态烃和硫酸盐是热化学还原反应的主要反应物,硫化氢、水、二氧化碳和碳酸盐、金属硫化物是其主要产物;热化学还原反应一般被写成总包反应过程;地质条件下热化学还原反应的速率受温度和活化能的制约。文章最后提出今后的研究方向应是在地质例证的同时结合实验模拟。更多还原

【Abstract】 Carbonate reservoir is usually accompanied by sulfate rock deposition. Under certain temperature and pressure, thermal degradation of kerogens gives rise to hydrocarbons. When sulfate rocks meet these hydrocarbons, thermochemical sulfate reduction （TSR） will occur and hydrocarbons disappear gradually. TSR may be one of the main reasons of the formation of natural gas dead line. The minimum temperature range for TSR, reactants and products, reaction mechanism and kinetics were summarized. The minimum temperature range for TSR is about 100～180 ℃. Hydrocarbons and sulfates are primary reactants of TSR. H₂S, H₂O, metal sulfide, CO₂ and carbonates are main products of TSR. The chemical stoichiometry of hydrocarbons and sulfates was given as the overall reaction process. The rate of TSR in geologic settings is limited by temperature and activation energy. Further research, especially combining geologic exemplification with simulation experiments in lab, is necessary to understand more details of the TSR system.更多还原