The Effects Of Sulphur On Transformation Of Organic Matter To Hydrocarbon

Hydrocarbon formation and evolution from organic matter is a complicated process with interacting between or~anic and inorganic matters. In this process, hydrocarbon formation and evolution from organic matters has important relation not only with types and content of organic matters, but also with temperature, environmental water, inorganic elements, inorganic minerals and so on. So we should not only research the property of organic matter itself, but also study the interaction between organic matter and inorganic elements, environmental water et al. In the past people paid more attention to researching the catalysis action of clay minerals, metal minerals, carbonate minerals during forming oil and gas, but it is not enough to study the mechanism of action and process of sulphur, especially the mechanism of forming the compounds of sulphur.Sulphur is widely dispersed in the hydrocarbon source rock and the environment existing oil and gas. Because of its active chemical properties, it exerts tremendous influence to hydrocarbon formation and evolution from organic matter. This study introduces the mechanism and degree of action of sulphur. By researching the systemznodcJing experiment, I obtains the following conclusions:1.Sulphur can promote the productivity of gas from hydrocarbon source rock under the condition of middle-low temperature. When temperature is 300 慍, sulphur raises efficiency of producing gas from kerogen 28 folds in Fushun oil shale (comparing to the condition that no sulphur exists in the oil shale), and raises efficIency of pmducing gas of the whole rock 21 folds (comparing to the condition that xm sulphur exists in the oil shale).2.Sulphur can greatly promote the productivity of soluble matters from hydrocarbon source rock under the condition of middle-low temperature. When temperature is 300 C, sulphur raises the efficiency of producing chloroform bitumen 揂?from kerogen and the whole rock respectively 5.6 folds and 1. .7 folds (comparing to the condition that no sulphur exists in the oil shale).3.Sulphur can greatly promote the productivity of liquid hydrocarbon under the condition of middle-low temperature. When temperature is 300 揅, sulphur raises the whole rock respectively 8.1 folds and 1.5 folds, and raises the efficiency of producing aromatic hydrocarbon respectively 12.7 folds and 2.1 folds.4.Under the condition of higher temperature, sulphur is disadvantageous to produce hydrocarbon. When temperature is 450 C, efficiency of producing gaseous and liquid hydrocarbon is lower in the condition that sulphur exists than efficiency in the condition that no sulphur exists.5.Sulphur can influence the chemical compositions of gaseous hydrocarbon produced. In the range of temperature from 150 C -450 C, sulphur can promote theIll~2)content of heavy compositions of gaseous hydrocarbon produced from kerogen and the whole rock to reduce.6.Sulphur can influence the carbon isotopes of gaseous hydrocarbon. It can make lighter carbon isotopes concentrate, especial for methane. With the number of carbon increasing, this phenomenon will decrease.7.Sulphur can promote producing aromatic hydrocarbon. Among the aromatic hydrocarbon, there are not only the compound of sulphur but also a lot of normal aromatic hydrocarbon.8.Under the condition of middle-low temperature, the less content of sulphur 1 can make alkyl exist steadily.9.Sulphur can join into kerogen, becoming sulphur-bearing kcrogan. In addition, adding sulphur can increase the content of organic carbon of the remains.In the past it isn抰 overall to research interaction between sulphur and organic matter. According to these conclusions, the affects of sulphur vary with the temperature. When study the formation and evolution of oil and gas, we should think about source matter, temperature and especially the influence of suphur.