25th International Meeting on Organic Geochemistry IMOG 2011

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P-359 A laboratory study of H2S production from the thermal reactions of magnesium sulfate and sulfur with a hydrocarbon reactant: implications for thermochemical sulfate reduction Hong Lu 1 , Paul Greenwood 2,3 , Tengshui Chen 1 , Jinzhong Liu 1 , Ping'an Peng 1 1 State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, China Academy of Sciences, Guangzhou, China, 2 WA Biogeochemistry and John De Laeter Mass Spectrometry Centres, University of Western Australia, Crawley-6009, WA, Perth, Australia, 3 Western australia Organic Isotope Geochemistry Centre, Curtin University GPO Box U1987, Bentley, WA 6845, Australia (corresponding author:luhong@gig.ac.cn) The reactions of pure n-C24 with MgSO4 elemental sulfur were investigated by monitoring the yields, stable carbon and hydrogen isotopic composition of gaseous products from their separate gold–tube pyrolysis treatment at a series of temperatures over the range 220–600 ℃. Thermal cracking via pyrolysis of just n-C24 were also conducted as a Control. H2S from the thermochemical sulfate reduction (TSR) of MgSO4 was initiated at 431 ℃, coincident with the evolution of C2–C5 hydrocarbons. Whereas the yields of H2S increased progressively with pyrolysis temperature, the hydrocarbon yields decreased sharply above 490 ℃ due to TSR consumption. Ethane and propane were initially very 13 C depleted, but became progressively heavier with pyrolysis temperature and were more 13 C enriched than Control values above 475 ℃. TSR of MgSO4 also led to progressively higher concentrations of 13 C depleted CO2 —due to preferential reaction of 12 C–bonds and precipitation of 13 C rich MgCO3 —at pyrolysis temperatures above 430 ℃. Sulfur reacted with n-C24 to produce H2S at the relatively low temperature of 250 ℃, implicating S–hydrocarbon reactions at practical geological conditions as a potentially important source of H2S subsurface deposits. Sulfur produced only low amounts of CO2 to 430 ℃, indicating abstraction of the H source for H2S occurred in the absence of C–C bond cleavage. Higher yields of 13 C depleted CO2— sulfur also showing a reactive preference for 12 C bonds—and low MW hydrocarbons were evident from 431 ℃, although a moderate reduction (i.e., not as rapid as with MgSO4 -TSR) of hydrocarbon levels above 492 ℃ was indicative of their TSR participation, consistent also with the increased yields of H2S and 13 C depleted CO2 at high temperatures. The reaction of low MW hydrocarbons with sulfur—added in the Sulfur treatment and also produced by sulfate oxidation in the MgSO4 treatment—may also account for the elemental sulfur (S8, S7, S6 and S4) and organic sulfur products detected in the solvent extractable fraction of their pyrolysis residues. Key words: TSR, H2S, MgSO4, elemental sulfur, sulfur radical, catalytic hydrogen abstraction. 489
P-360 High pressure pyrolysis of hydrocarbons in the presence of H2S. Significance to the composition of oils in reservoirs Van Phuc Nguyen 1 , Raymond Michels 1 , Paul-Marie Marquaire 2 , Valérie Burklé-Vitzthum 2 1 UMR 7566 G2R, CNRS, Nancy Université, Vandoeuvre-lès-Nancy, France, 2 CNRS - Laboratoire Réactions et Génie des Procédés, LRGP-UPR 3349 , Nancy Université, ENSIC, NANCY, France (corresponding author:Van-Phuc.Nguyen@g2r.uhp-nancy.fr) The understanding of the reactivity of sulfur species in petroleum reservoirs is of prime interest to geosciences. The origin of H2S in reservoirs can be related to sulfur rich source rocks, to the thermochemical reduction of sulfates, or to bacterial sulfate reduction for instance. The H2S source may be readily elucidated by isotope measurements of sulfur. Yet, the understanding of the reactivity of H2S in the presence of hydrocarbons is still of concern in many aspects of petroleum interests, as to predict sulfur species in high sulfur reservoirs, hydrocarbons stability in deep-hot reservoirs, H2S yields forecast during heavy oil recovery, or H2S sequestration during acid gas injection. In order to study the reactivity of H2S in the presence of hydrocarbons, pyrolysis experiments were conducted on whole oils and pure compounds using gold cell pyrolysis conducted at 200°C
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25th Inter
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Dear Conference Delegates, Preface
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Monday 19 th September 2011 - Morni
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Monday 19 th September 2011 - After
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Tuesday 20 th September 2011 - Afte
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Wednesday 21 st September 2011 - Mo
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Wednesday 21 st September 2011 - Af
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13.40 - 15.05 Poster Session 4 (In
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Friday 23 rd September 2011 - Morni
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Poster Sessions (in Kongress-Saal)
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P-026 Comparison of comprehensive t
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P-052 Incorporation of Archaeal and
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P-081 Geochemical evidence for two
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P-108 Organic geochemistry and Meso
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P-133 Can we estimate catchment-sca
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P-157 Can laterally advected interm
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P-182 The influence of hydrogen on
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P-207 Biomarkers along a holocene s
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P-232 Some experimental results on
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P-261 Natural gas generation, migra
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P-288 Re/Os fractionation during ge
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P-314 Chemometric analysis of oil-o
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P-340 Atypical fluids in offshore s
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P-366 Organic geochemical character
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P-392 Environmental forensic study
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P-416 Developing analytical protoco
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P-442 Deep-sea benthic archaea recy
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P-464 Effects of within-catchment p
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Poster Session 4 - Thursday 22 nd S
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Monday Oral Presentations 58
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O-02 Melting history of West Antarc
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O-04 Insights about the marine nitr
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O-06 Eocene out-of-India dispersal
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O-08 An integrated lipid biomarker
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O-10 Sulfur species as facilitators
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O-12 Sulfur isotope systematic of i
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O-14 Exploring the diversity of arc
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O-16 Improved genetic characterizat
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O-18 Petroleum system analysis Sout
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O-19 The borolithochromes: boron-co
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O-21 Study of the stable isotopic c
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O-23 Novel applications of trace me
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O-25 The chemical structure of inso
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O-27 Coenzyme factor 430: abundance
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O-29 Influence of temperature on me
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O-31 The fate of collembola derived
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O-33 Empirical relationship between
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O-35 Biomarker evidence for the Lat
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O-37 The seco-oleananes: identifica
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O-38 Microbial communities associat
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O-40 The importance of geochemical
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O-42 Charge history and petroleum g
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O-44 Bacterial formation of (di)eth
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O-46 Development of a novel tool fo
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O-48 Evolution of petroleum composi
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O-50 Beyond Orgas- BP’s new predi
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O-52 Nitrogen isotopes of amino aci
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O-54 Biomarker and petrographic evi
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O-55 The organic geochemistry of ca
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O-57 Exploring mass extinction even
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O-59 Black shale formation by micro
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O-61 The significant impact of weat
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O-63 Simultaneous shifts in tempera
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O-65 Fluxes and isotope composition
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O-67 Biogeochemical impact of CO2 e
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Bacteria number ml-1 Bacteria numbe
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O-71 Aquathermolysis: pressure effe
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O-73 Designing tight-shale producti
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O-74 Tracing 13C-labeled inorganic
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O-76 Carbon fluxes in phylogenetica
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O-78 Fluid property prediction from
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O-80 Denitrifying bacteria as poten
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O-82 Tetraether lipid profiles in c
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O-84 Prediction of gas volume and d
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Monday Poster Presentations 148
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P-002 Structure and function of asp
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P-004 Preliminary study of acid deg
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P-006 Chemical and geochemical char
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P-008 High resolution measurement o
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P-010 Acidic fraction analyses of B
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P-012 Heteroatom-containing compoun
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P-014 Evaluation of hydropyrolysis
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P-016 Iron isotopic compositions of
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P-018 Evaluation of accelerated sol
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P-020 Improvement of HPLC-protocols
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P-022 Open-system hydrous pyrolysis
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P-024 The phenolic characterisation
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P-026 Comparison of comprehensive t
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P-028 Characterisation of lignin de
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P-030 Trace analysis of methylated
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P-033 An evaluation of petroleum so
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P-035 Contrasting macromolecular or
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P-037 Evolution of depositional env
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P-039 Organic carbon content and ch
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P-041 Organic geochemistry of entra
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P-043 Petrological and organic geoc
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P-045 Occurrence and geochemical ch
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P-047 Characterization of lignites
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P-049 Organic matter of Lower Permi
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P-051 Kerogen sulphur, hydrogen and
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P-053 Sulfur-bound compounds in fre
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P-055 Organic matter preservation i
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P-058 Characterization of aromatic
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P-060 Biomarkers parameters used to
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P-063 Origin of crude oil with high
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P-065 Molecular maturation of Bitum
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P-067 C21-C23 steroidal tricyclic t
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P-069 The age and palaeoenvironment
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P-071 Structural characterization o
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P-074 Discussion on appliance of 25
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P-076 Lanostanes as the new biomark
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P-079 Geochemistry of ―just gener
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P-081 Geochemical evidence for two
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P-083 Thermal maturity assessment o
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P-085 Flash pyrolysis-gas chromatog
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P-087 Petroleum geochemistry of the
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P-089 Addressing thermogenic and bi
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P-091 Investigation of oil stabilit
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P-093 Organic geochemistry, petrole
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P-095 Natural petroleum fractionati
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P-097 Geochemistry of low-boiling
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P-099 Oxygen-containing compounds i
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P-101 Formation of giant deep-burie
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P-103 Geochemical characteristics o
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P-105 Challenges on the origin of o
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P-107 Caldera of the Uzon volcano a
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P-109 A saga on organic geochemistr
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P-111 An integrated inorganic and o
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P-114 Hydrocarbon generation potent
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P-116 Marine transgressional event
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P-118 The cracking kinetics of two
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P-120 The generation potential of t
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P-122 Organic geochemical character
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P-124 Compositional features of org
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P-126 The value of generation hydro
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P-128 Investigation of fish pond ma
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P-130 Bituminous mixtures of Hakemi
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P-132 Combined � 13 C - �D anal
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P-134 Biomarkers preserved in cave
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P-136 Analysis of insoluble organic
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P-139 Role and nature of organic ma
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P-141 Biosurfactants - a green alte
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P-143 Phenolic compounds in water l
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P-145 Current level of the organic
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P-147 The d13C composition of indiv
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P-149 Targeted chemical and physica
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P-151 Cu(II) complexation with humi
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P-153 Differentiation of indoor and
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P-156 A detailed study of the intac
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P-158 Unusual distribution of long-
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P-160 Biomarker signatures of metha
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P-162 Lipid biomarkers and bulk bio
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P-164 Chemotaxonomic composition an
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P-166 The role of two submarine can
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P-168 Correlation of crenarchaea an
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P-170 Microbial activity and abunda
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P-172 Microbially mediated carbonat
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P-174 Distinct microbial inventorie
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P-176 Microbial consortium mediatin
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P-178 Diversity of microbial commun
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P-180 Inhibition of anaerobic oil d
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P-182 The influence of hydrogen on
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P-184 Have they lost their heads? D
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P-187 Paleohydrological changes on
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P-189 Paleoenvironmental variations
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P-191 Highly branched isoprenoid al
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P-193 A new global calibration for
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P-195 Molecular fossils and the lat
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P-197 Sediment trap and core top st
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P-199 Detection of environmental ch
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P-201 Carbon and hydrogen isotope b
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P-203 Biogeochemical processes in H
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P-205 Lipid biomarker analysis of f
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P-207 Biomarkers along a holocene s
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P-209 A comparison of methane emiss
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P-211 Paleocene-Eocene Thermal Maxi
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P-213 Biomarker proxies indicate si
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P-215 Distributions of long-chain d
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P-217 The Vinylguaiacol/Indole or V
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P-219 The age and palaeoenvironment
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P-221 Differences in distribution o
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P-225 The change of land plant deri
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P-227 Terrestrial organic matter in
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P-229 Geochemical peculiarities of
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P-231 Bacteriohopanepolyol content
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P-233 Branched GDGTs in the Yenisei
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P-235 Simulation of organic matter
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P-237 Nature of C29 sterols in the
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P-239 Differentiation of organic ma
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P-242 Changes of Rock-Eval HI, OI,
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P-244 Identification and distributi
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P-246 Carbon isotopes and lipid bio
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P-248 Comparison of soil organic ma
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P-250 Biomarker distribution along
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Wednesday Poster Presentations 388
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P-255 Gas source classification in
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P-257 The components and carbon iso
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P-259 Stable carbon isotopes of coa
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P-261 Natural gas generation, migra
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P-264 Natural gas geochemistry of t
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P-266 Geochemical and isotopic char
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P-269 Distribution of alkylbenzenes
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P-271 Terrestrial-derived biomarker
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P-273 Preservation of β-carotane i
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P-275 Aromatic hydrocarbons in oils
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P-277 Statistical analysis of diamo
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P-279 Characterization of biomarker
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P-281 The significance of novel A-n
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P-283 Correlation between compositi
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P-285 Understanding Fluid Inclusion
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P-287 The hydrocarbon occurrence an
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P-289 Correlation of crude oils res
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P-291 Geochemical parameters for un
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P-293 Hydrocarbon biomarkers in the
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P-295 Using diamondoids to unravel
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P-297 Significance of aromatic biom
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P-299 Drilling conditions making we
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P-301 Biomarker distributions and
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P-303 Evaluation of petroleum syste
Page 439 and 440: P-305 Geochemical indices of hydroc
Page 441 and 442: P-307 Basin modelling of the Hammer
Page 443 and 444: P-309 Comparative characteristics o
Page 445 and 446: P-311 High water pressure induced c
Page 447 and 448: P-313 Calibration of absolute matur
Page 449 and 450: P-315 Organic Geochemistry of Lower
Page 451 and 452: P-317 Laboratory simulation of vert
Page 453 and 454: P-319 The study of C1-C3 gas genera
Page 455 and 456: P-321 Hydrocarbon potential of Maik
Page 457 and 458: P-323 Paleoenvironment significance
Page 459 and 460: P-325 Origin of abnormal sonic resp
Page 461 and 462: P-327 Organic geochemistry and orga
Page 463 and 464: P-329 Characterising the deposition
Page 465 and 466: P-331 Organic-geochemical character
Page 467 and 468: P-335 Geochemistry of aqua-bitumoid
Page 469 and 470: P-337 Application of electrospray i
Page 471 and 472: P-339 Geochemical characterization
Page 473 and 474: P-341 Simulation studies on the ads
Page 475 and 476: P-343 Effective diffusivities of CO
Page 477 and 478: P-345 Oil Fingerprinting associated
Page 479 and 480: P-347 Strategies for the assessment
Page 481 and 482: P-349 Fluid pressure evolution and
Page 483 and 484: P-351 The releasing of covalently-b
Page 485 and 486: P-354 Sulfur isotope fractionation
Page 487 and 488: P-356 Controls on the kinetics of t
Page 489: P-358 Sulfur compounds in liquid pr
Page 493 and 494: P-362 The reaction of elemental sul
Page 495 and 496: P-365 Geochemical evaluation of the
Page 497 and 498: P-367 Geochemical controls on shale
Page 499 and 500: P-369 Evolution of pores in organic
Page 501 and 502: P-371 Preliminary investigations in
Page 503 and 504: P-373 Geochemistry of coalbed metha
Page 505 and 506: P-375 Integration of basin modeling
Page 507 and 508: P-377 Oil shales occurring in Mongo
Page 509 and 510: Thursday Poster Presentations 508
Page 511 and 512: P-381 Permissible concentration of
Page 513 and 514: P-383 Accumulation and degradation
Page 515 and 516: P-385 Source determination and dept
Page 517 and 518: P-387 The use of phospholipid fatty
Page 519 and 520: P-389 Biogeochemical process studie
Page 521 and 522: P-391 Environmental forensics-recen
Page 523 and 524: P-393 Geochemical characterization
Page 525 and 526: P-395 Source characterization using
Page 527 and 528: P-397 Impact of different operating
Page 529 and 530: P-399 Resolving sources and preserv
Page 531 and 532: P-402 New insights into soil organi
Page 533 and 534: P-404 Amino sugars as biomarkers fo
Page 535 and 536: P-406 Biogeochemistry of lake Soppe
Page 537 and 538: P-408 Sea surface salinity reconstr
Page 539 and 540: P-410 Carbon cycling in lacustrine
Page 541 and 542:
P-412 Radiocarbon distributions in
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P-414 European lake sediment calibr
Page 545 and 546:
P-416 Developing analytical protoco
Page 547 and 548:
P-418 Extreme intra- and intermolec
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P-420 � 2 H differences among lip
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P-424 Intact polar lipid and associ
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P-426 Bacterial versus archaeal act
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P-428 Study of microbial activity a
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P-430 New bacteriochlorophyll degra
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P-432 Thermally stable anammox biom
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P-434 Impact of a high CO2 partial
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P-436 Methane oxidation in the wate
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P-438 Lipid biomarkers of archaeal
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P-440 Estimation of endospore numbe
Page 569 and 570:
P-442 Deep-sea benthic archaea recy
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P-444 Isolating and cultivating env
Page 573 and 574:
P-446 Distribution of ammonia-oxidi
Page 575 and 576:
P-448 Genetic and metabolic charact
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P-450 Proxies based on archaeal and
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P-453 Experimental palaeochemotaxon
Page 581 and 582:
P-455 Long term cooling and punctua
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P-457 Molecular and isotopic eviden
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P-459 Long-term variations of palae
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P-461 Miocene to Pliocene environme
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P-463 Holocene paleoclimatic variat
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P-465 Hydrological and biogeochemic
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P-467 Molecular hydrogen isotope sy
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P-469 Impact of anaerobic methane o
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P-471 Integrating biomarker and mic
Page 599 and 600:
P-473 Application of TEX86-paleothe
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P-475 Stable isotopes (C, S) and hy
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P-478 The first findings of 12- and
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P-480 The 3 P’s* and the Albian o
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P-482 Meter-scale oxygen gradients
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P-484 Coupling of Miocene-Pliocene
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P-486 New molecular marker and spec
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P-488 Paleoenvironmental changes fr
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P-491 Methoxy-serratenes as discrim
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P-493 Vegetation and soil organic m
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P-497 Decomposition of wheat straw
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P-499 The relationship between peat
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P-501 Land use and climatic effects
Page 625 and 626:
P-503 Geochemical characterization
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P-505 Organic carbon composition an
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P-507 Dynamics of soil organic matt
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P-509 Exploiting isotopic, organic,
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P-511 The effect of soil moisture o
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P-513 Anaerobic oxidation of plant-
Page 637 and 638:
P-515 Variability of terrestrially-
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Author Index 638
Page 641 and 642:
Anselmetti Flavio S. O-63 Ansong Ge
Page 643 and 644:
Brinkhuis Henk P-200, P-468 Britton
Page 645 and 646:
de Souza Carvalho Ismar P-017 Dedys
Page 647 and 648:
Francu Juraj P-037, P-266 Frank Ric
Page 649 and 650:
Hart Malcolm O-09 Hartkopf-Fröder
Page 651 and 652:
Jin Zhijun P-094 Jingjing Li P-179
Page 653 and 654:
Lausmaa Jukka O-58 Lavrieux Marlèn
Page 655 and 656:
Marsh Steven P-509 Marshall Chris O
Page 657 and 658:
Nemchenko- Rovenskaya Alla P-112 Ne
Page 659 and 660:
Radovic Miljana P-152 Ramanathan AL
Page 661 and 662:
Schröder Jan P-020, P-029 Schubert
Page 663 and 664:
Strelnikova Eugenia P-099 Stuart-Wi
Page 665 and 666:
Wakeham Stuart G. O-69 Walters Clif
Page 667 and 668:
Zhang Jing P-515 Zhang Jingru P-398
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25th International Meeting on Organic Geochemistry IMOG 2011

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