scholarly journals Geochemical evaluation, including whole oil gas chromatography, aromatic biomarkers, saturate gcms, isotopes, metals, MSMS, SARA composition and sulfur from an oil sample from the Stinston #1 well

2018 ◽  
Author(s):  
Bureau of Ocean Energy Management, Alaska OCS Region ◽  
Keyword(s):  
Gas Chromatography ◽  
Geochemical Evaluation ◽  
Oil Gas

scholarly journals Geochemical Significance of Biomarkers in the Methane Hydrate-Bearing Sediments from the Shenhu Area, the South China Sea

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 456 ◽  
Author(s):  
Qian-Zhi Zhou ◽  
Yan Li ◽  
Fang Chen ◽  
Shui-Fu Li ◽  
Shu-Jun Dong ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
South China Sea ◽  
South China ◽  
Methane Hydrate ◽  
Microbial Activities ◽  
Shenhu Area ◽  
Gas Reservoirs ◽  
Hydrate Bearing Sediments ◽  
Oil Gas

Biomarkers from methane hydrate-bearing sediments can provide vital evidence for microbial activities associated with methanogenesis and their relation to the formation of methane hydrates. However, the former mainly focus on intact polar lipids from these microorganisms, and rarely investigate molecular hydrocarbons such as acyclic isoprenoids and hopanes so far. In this work, the composition of biomarkers in the methane hydrate-bearing sediments in cores SH2B and SH7B from the Shenhu area, the South China Sea (SCS) were identified by gas chromatography-mass spectrometry (GC-MS) and comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GC×GC-TOFMS). The occurrence of unresolved complex mixtures (UCMs) and 25-norhopane indicate that the organic matters in methane hydrate-bearing sediments underwent a high degree of biodegradation. Although specific biomarkers for methanogens were not identified, the UCMs, 25-norhopane, pristane, phytane, and hopanes can still indicate the microbial activities associated with methanogenesis. These molecular signals suggest that diverse microorganisms, particularly methanogens, were quite vigorous in the methane hydrate-bearing sediments. Further, the biomarkers identified in this study can also be steadily detected from deep oil/gas reservoirs. Considering numerous adjacent oil/gas reservoir systems, fault systems, and mud diapers occurred in the SCS, it can be inferred that microbial activities and deep oil/gas reservoirs may have jointly contributed to the formation of methane hydrate deposits in the SCS.

RECENT ORGANIC GEOCHEMICAL EVALUATION OF THE CENTRAL EROMANGA BASIN

1987 ◽  
Vol 27 (1) ◽  
pp. 106
Author(s):  
Ganjavar Khavari Khorasani
Keyword(s):  
Gas Chromatography ◽  
Saturated Hydrocarbons ◽  
Bulk Properties ◽  
Organic Facies ◽  
Geochemical Evaluation ◽  
Oil Generation ◽  
Gas Chromatography Mass Spectroscopy ◽  
Rock Eval ◽  
Distinct Increase ◽  
Eromanga Basin

Systematic analyses of bulk properties and of molecular composition, by gas chromatography (GC), fluorescence spectroscopy, gas chromatography-mass spectroscopy (GC-MS), reflectance photometry and 'Rock-Eval' pyrolysis of core samples from three stratigraphic bores from the central and northern-central Eromanga Basin, reveal the following:The organic facies variations in the central Eromanga are considerable; however, the biofacies can be grouped into three major types.The sediments do not enter the mature zone of oil generation until a reflectance level of 0.65 per cent Rv max. or higher is reached. The Birkhead Formation, with a 'hydrogen-rich' type III kerogen, is only marginally mature and the amounts of hydrocarbons already generated are minor. In the Early Jurassic sedimentary unit (Basal Jurassic Shale Unit), however, there is a distinct increase in the level of S1/Organic Carbon indices and in the maturity of organic matter. While the extracts from younger Jurassic sequences of the basin display a substantial waxy character, the bitumens derived from the Basal Jurassic Unit are highly aromatic in character and contain few saturated hydrocarbons.

The impact of comprehensive two-dimensional gas chromatography on oil & gas analysis: Recent advances and applications in petroleum industry

2018 ◽  
Vol 105 ◽  
pp. 202-217 ◽  
Author(s):  
Breno J. Pollo ◽  
Guilherme L. Alexandrino ◽  
Fabio Augusto ◽  
Leandro W. Hantao
Keyword(s):  
Gas Chromatography ◽  
Petroleum Industry ◽  
Gas Analysis ◽  
Two Dimensional ◽  
Recent Advances ◽  
The Impact ◽  
Oil Gas
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