Geochemistry of Sulfur in Petroleum Systems

Thermodynamic Analysis of Organic/Inorganic Reactions Involving Sulfur: Implications for the Sequestration of H2s in Carbonate Reservoirs

“…Organic sulfur compounds first form during early diagenetic processes through reactions between bacterially produced hydrogen sulfide and carbon-carbon double bonds or oxygen-bearing functional groups of the biological precursors of sedimentary organic matter [32]. These reactions result in the formation of sulfur-rich kerogens, and the subsequent generation of sulfur-rich crude oils from these kerogens.…”

“…The two organic sulfur compounds involved in Reactions (27)- (30) have been chosen because alkylthiacyclopentanes and alkylbenzothiophenes are representative of immature and mature crude oils, respectively [32]. Their idealized structures are depicted in Figure 6 along with those of n-decane and n-butylbenzene.…”

Simulation Experiments and Kinetics for the Formation of Organic Sulfide in Marine Carbonate Reservoirs

“…The sample basket which is made of quartz glass with 10.0 g of MgSO 4 was put into the reactor before vacuumed, then 5 mL of distilled water and 20 mL of 93# gasoline oil were fed into the autoclave through a feed regulator.…”

“…These effects caused alteration and destruction of reservoirs. Consequently, mercaptan, sulfide, thiophene and their derivants were formed in the reservoir [2][3][4][5]. Non-thiophene organic sulfides were dominated in lowmaturity crude oil while in high-maturity crude oil, dibenzothiophene was dominated.…”

Hydrous pyrolysis of organic sulfur compounds: Species and distribution of secondary derivatives

“…In this study, by using same amount of water in all experiments, we aimed to maintain approximately the same pressure in the experiments at the same temperature. It is well documented that H 2 S and elemental sulfur produced from the bacterial reduction of sulfate and from the diagenesis of sedimentary OM will preferentially react with a base metal (or metal ions) to form the corresponding metal sulfide [mainly iron sulfide (pyrite)] [19], whereas if the sediment is depleted in metal ions, the H 2 S will react with OM to form OSCs [15,[20][21][22]. So, by introducing a metal compound into the experiments, the H 2 S or elemental S produced from the decomposition of OSCs would react with metal ions preferentially to form a metal sulfide, preventing reaction between the H 2 S and OM to form secondary OSCs.…”