摘要
Crude oil rich in sulfur,kerogen of types Ⅱ and Ⅲ and magnesium sulfate were tested in 6 reaction systems(divided into 3 groups) so as to study the influences of thermochemical sulfate reduction(TSR) on gaseous hydrocarbon components and carbon isotopes.The modeling experiments have proved that: 1)TSR leads to the obvious increase of H2S and CO2 yields;2)TSR makes gaseous hydrocarbon become dryer,that is,the C2+ series are easier to react in TSR while CH4 seldom participates in TSR;3)TSR makes the carbon isotopes of gaseous hydrocarbon become heavier and that of CO2 become lighter; and 4) TSR makes much more obvious change of carbon isotopes in methane than in ethane and propane,that is,the value of δC2-δC1 decreases.