The Effects of Thermochemical Sulfate Reduction on Occurrence of Oil-Cracking Gas and Reformation of Deep Carbonate Reservoir and the Interaction Mechanisms
详细信息
- 责任者：Zhang Shuichang (Research Institute of Petroleum Exploration and Development ; PetroChina ; Beijing 100083 ; China) ; Zhu Guangyou
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(3)
- 关键词：裂解气 ; cracked gas ; 碳酸盐岩储集层 ; carbonate reservoirs ; 原油 ; crude oil ; 四川盆地 ; Sichuan Basin
- 页码：p.809-826
- 图表：17 illus., 2 tables, 73 refs.
- 分类号：1003
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
This paper firstly studied the influence of TSR on the occurrence of oil-cracking gas by gold-tube pyrolysis. It was revealed that the redox reaction can evidently decrease the thermal stability of oil and accelerate the generation of natural gas with H2S and high dryness. It was confirmed that contact ion pairs (CIP) should be the most feasible oxidant in initiation reaction of TSR collectively by in situ Raman technology and pyrolysis experiments. The potential factors, which can dominate TSR reaction, were thoroughly discussed. It was found that the salts type and concentration in addition to oil compositions, labile organo-sulfur compounds (LSC) content should be the critical factors for occurrence of TSR. It is suggested that, the redox reaction involving hydrocarbons and sulfate and the reformation of reservoir should be two closely related and dependent processes induced by whole TSR.
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