scholarly journals Geochemical evaluation of: Altamura 1, Caribou 26-11-1, Inigok 1, North Inigok 1, Qugruk 4, Tofkat 1, and West Fish Creek 1 wells for whole-oil gas chromatography, soxhlet extractions, and biomarker analysis

2016 ◽  
Author(s):  
Keyword(s):  
Gas Chromatography ◽  
Geochemical Evaluation ◽  
Biomarker Analysis ◽  
Oil Gas

scholarly journals Comprehensive two-dimensional gas chromatography with time of flight mass spectrometry applied to biomarker analysis of oils from Colombia

Fuel ◽  
2011 ◽  
Vol 90 (8) ◽  
pp. 2694-2699 ◽  
Author(s):  
Raphael S.F. Silva ◽  
Hélen G.M. Aguiar ◽  
Mário D. Rangel ◽  
Débora A. Azevedo ◽  
Francisco R. Aquino Neto
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Time Of Flight ◽  
Two Dimensional ◽  
Flight Mass Spectrometry ◽  
Biomarker Analysis

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.

scholarly journals Micro-contextual identification of archaeological lipid biomarkers using resin-impregnated sediment slabs

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Caterina Rodríguez de Vera ◽  
Antonio V. Herrera-Herrera ◽  
Margarita Jambrina-Enríquez ◽  
Santiago Sossa-Ríos ◽  
Jesús González-Urquijo ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Isotope Ratio ◽  
Polyester Resin ◽  
Lipid Biomarkers ◽  
Gas Chromatography Mass Spectrometry ◽  
Contextual Approach ◽  
Sediment Samples ◽  
Lipid Fractions ◽  
Biomarker Analysis ◽  
High Polarity

AbstractCharacterizing organic matter preserved in archaeological sediment is crucial to behavioral and paleoenvironmental investigations. This task becomes particularly challenging when considering microstratigraphic complexity. Most of the current analytical methods rely on loose sediment samples lacking spatial and temporal resolution at a microstratigraphic scale, adding uncertainty to the results. Here, we explore the potential of targeted molecular and isotopic biomarker analysis on polyester resin-impregnated sediment slabs from archaeological micromorphology, a technique that provides microstratigraphic control. We performed gas chromatography–mass spectrometry (GC–MS) and gas chromatography–isotope ratio mass spectromety (GC–IRMS) analyses on a set of samples including drill dust from resin-impregnated experimental and archaeological samples, loose samples from the same locations and resin control samples to assess the degree of interference of polyester resin in the GC–MS and Carbon-IRMS signals of different lipid fractions (n-alkanes, aromatics, n-ketones, alcohols, fatty acids and other high polarity lipids). The results show that biomarkers within the n-alkane, aromatic, n-ketone, and alcohol fractions can be identified. Further work is needed to expand the range of identifiable lipid biomarkers. This study represents the first micro-contextual approach to archaeological lipid biomarkers and contributes to the advance of archaeological science by adding a new method to obtain behavioral or paleoenvironmental proxies.

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

scholarly journals Biomarker Characterization of Oil Seepages in Tomori Basin, Central Sulawesi, Indonesia

2021 ◽  
Vol 921 (1) ◽  
pp. 012026
Author(s):  
M S Burhanuddin ◽  
A Jaya ◽  
A Maulana
Keyword(s):  
Gas Chromatography ◽  
Organic Matter ◽  
Hypersaline Environment ◽  
Terrestrial Organic Matter ◽  
Anoxic Conditions ◽  
Biomarker Analysis ◽  
Oil Seepage ◽  
Anoxic Environment ◽  
Seepage Characteristics ◽  
Organic Matter Input

Abstract Tomori Basin is located close to the Banggai Basin which has several productive oil fields. Further investigation of the hydrocarbon potential in Tomori Basin is an important issue as potential hydrocarbon resources are indicated by the discovery of several oil seepages in the area. This study identified Tomori Basin oil seepage characteristics using a biomarker analysis approach. The Wosu and Kolo Areas were the main objectives of this study. Oil seepage characteristics were determined using Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS) methods to generate biomarker data which could be analysed to identify organic matter origin, oxic and anoxic conditions, source facies, or depositional environment. Based on the GC analysis of is oprenoids, the Pristane C19/Phytane C20 ratio (Pr/Ph) of Wosu Oil was 0.75, indicating anoxic conditions typical of a hypersaline environment. Kolo Oil had a Pr/Ph ratio of 3.37 indicative of terrestrial organic input under oxic conditions. A cross plot between Pristane/nC17 and Pr/Ph ratios indicates that Wosu Oil derives from a highly anoxic environment with algae/bacterial organic matter input whereas Kolo Oil derives from a suboxic-oxic environment dominated by terrestrial organic matter input. Trycyclic terpene analysis from C19 to C25 shows Wosu Oil seepages tend to originate from an environment of mixed terrestrial and marine organic matter (transitional environment). Overall, biomarker characteristics indicate that Wosu Oil originated from organic matter in a hypersaline and anoxic environment, whereas Kolo Oil originated from terrestrial matter in a suboxic – oxic environment.

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