Petroleum potential of the Upper Palaeozoic basement of the Songliao Basin, northeast China

Cosima Theloy

Petroleum potential of the Upper Palaeozoic basement of the Songliao Basin, northeast China

Titel in Übersetzung: Muttergesteinspotential paläozoischer Sedimente im Basement des Songliao Beckens, NE China

Cosima Theloy

Lehrstuhl für Energy Geosciences (630)

Publikation: Thesis / Studienabschlussarbeiten und Habilitationsschriften › Diplomarbeit

167 Downloads (Pure)

Abstract

Das nicht-marine, intrakratonische Songliao Becken im Nordosten Chinas gehört zu den ertragreichsten Erdöl und Erdgas Provinzen am chinesischen Festland. Jedoch, sind fast alle bekannten Erdöl- und Erdgasfelder am Ende der Produktionsphase angelangt, weswegen die tiefern Stockwerke des Beckens sowie der Beckenuntergrund zum Explorationsziel geworden sind. 83 Proben mit einem Devon- bis Triasalter wurden für die Evaluierung des Muttergesteinspotentials des Beckenuntergrundes ausgewählt. Alle Proben stammen aus Aufschlüssen in der Umgebung des Songliao Beckens. Die Ergebnisse der Leco Messungen, zeigen, dass die meisten Proben moderate bis gute Gehalte an organischem Kohlenstoff (TOC) aufweisen (0.5 - 1.5 %). Fünf Proben besitzen exzellente TOC Gehalte zwischen 2 und 5 %. Die gemessenen Vitrinitreflexionswerte schwanken zwischen 2.2 und 5.7 % Rmax (2.0 und 5.3 % Ro) und zeigen, dass die Gesteine überreif sind. Wegen der fortgeschrittenen Reife der Proben, wurden während der Rock Eval Pyrolyse keine Kohlenwasserstoffe freigesetzt oder neu gebildet. Wahrscheinlich erfolgt die Reifung der Oberflächenproben vor der jurassisch/kretazischen Absenkung des Songliao Beckens. Proben im Untergrund von Grabenstrukturen innerhalb des Songliao Beckens könnten jedoch eine Nachinkohlung erfahren haben. Dabei könnten geringe Mengen an Gas gebildet worden sein. Die Auswertung der Röntgenfluoreszenzanalyse ergab, dass das Liefergebiet silziklatstisch dominiert war mit zum Teil (ultra-)basischem Einfluss.

Titel in Übersetzung	Muttergesteinspotential paläozoischer Sedimente im Basement des Songliao Beckens, NE China
Originalsprache	Englisch
Qualifikation	Dipl.-Ing.
Betreuer/-in / Berater/-in	Sachsenhofer, Reinhard F., Betreuer (intern)
Datum der Bewilligung	19 Dez. 2008
Publikationsstatus	Veröffentlicht - 2008

Bibliographische Notiz

gesperrt bis null

Schlagwörter

China Songliao Becken Maturität Vitrinitreflexion Muttergestein Paläozoikum

UN SDGs

Dieser Output leistet einen Beitrag zu folgendem(n) Ziel(en) für nachhaltige Entwicklung

Zugriff auf Dokument

VolltextEndgültige, publizierte Fassung, 10,3 MB

Dieses zitieren

@phdthesis{d6fe5dfaebfa4e95b86e38a69360eb03,

title = "Petroleum potential of the Upper Palaeozoic basement of the Songliao Basin, northeast China",

abstract = "The non-marine, intracratonic Songliao Basin in northeast China is one of the most prolific onshore petroleum provinces. The fact that most known oil and gas fields within the Mesozoic/Cenozoic basin fill have reached a mature stage of production stimulates exploration in deeper levels of the basin as well as in its Palaeozoic and Triassic basement. For the evaluation of the generation potential of basement rocks, 83 samples of dark shales of Devonian to Triassic age have been taken from outcrops in the surroundings of the basin. The results of the Leco analysis show that most samples have fair to good total organic carbon (TOC) contents, ranging from 0.5 to 1.5 %. Five samples yielded excellent TOC contents (2 - 5 %). Vitrinite reflectance values between 2.2 and 5.7 %Rmax (2.0 and 5.3 % Ro) indicate that all samples are overmature. Due to high thermal maturity, no hydrocarbons were released or generated from the samples during Rock Eval pyrolysis. Most probably maturation of outcrop samples occurred before Jurassic/Cretaceous formation of the Songliao Basin. However, an additional thermal overprint of Palaeozoic rocks might have occurred at the base of the depocenters of the Songliao Basin. Thus, despite of the high maturity, some gas in the Songliao Basin may be derived from Palaeozoic and Triassic rocks. The data of X-ray fluorescence analysis indicate a silciclastic-dominated hinterland with minor (ultra-)basic rocks.",

keywords = "China Songliao Basin maturity vitrinite reflectance source rock Palaeozoic, China Songliao Becken Maturit{\"a}t Vitrinitreflexion Muttergestein Pal{\"a}ozoikum",

author = "Cosima Theloy",

note = "embargoed until null",

year = "2008",

language = "English",

type = "Diploma Thesis",

}

TY - THES

T1 - Petroleum potential of the Upper Palaeozoic basement of the Songliao Basin, northeast China

AU - Theloy, Cosima

N1 - embargoed until null

PY - 2008

Y1 - 2008

N2 - The non-marine, intracratonic Songliao Basin in northeast China is one of the most prolific onshore petroleum provinces. The fact that most known oil and gas fields within the Mesozoic/Cenozoic basin fill have reached a mature stage of production stimulates exploration in deeper levels of the basin as well as in its Palaeozoic and Triassic basement. For the evaluation of the generation potential of basement rocks, 83 samples of dark shales of Devonian to Triassic age have been taken from outcrops in the surroundings of the basin. The results of the Leco analysis show that most samples have fair to good total organic carbon (TOC) contents, ranging from 0.5 to 1.5 %. Five samples yielded excellent TOC contents (2 - 5 %). Vitrinite reflectance values between 2.2 and 5.7 %Rmax (2.0 and 5.3 % Ro) indicate that all samples are overmature. Due to high thermal maturity, no hydrocarbons were released or generated from the samples during Rock Eval pyrolysis. Most probably maturation of outcrop samples occurred before Jurassic/Cretaceous formation of the Songliao Basin. However, an additional thermal overprint of Palaeozoic rocks might have occurred at the base of the depocenters of the Songliao Basin. Thus, despite of the high maturity, some gas in the Songliao Basin may be derived from Palaeozoic and Triassic rocks. The data of X-ray fluorescence analysis indicate a silciclastic-dominated hinterland with minor (ultra-)basic rocks.

AB - The non-marine, intracratonic Songliao Basin in northeast China is one of the most prolific onshore petroleum provinces. The fact that most known oil and gas fields within the Mesozoic/Cenozoic basin fill have reached a mature stage of production stimulates exploration in deeper levels of the basin as well as in its Palaeozoic and Triassic basement. For the evaluation of the generation potential of basement rocks, 83 samples of dark shales of Devonian to Triassic age have been taken from outcrops in the surroundings of the basin. The results of the Leco analysis show that most samples have fair to good total organic carbon (TOC) contents, ranging from 0.5 to 1.5 %. Five samples yielded excellent TOC contents (2 - 5 %). Vitrinite reflectance values between 2.2 and 5.7 %Rmax (2.0 and 5.3 % Ro) indicate that all samples are overmature. Due to high thermal maturity, no hydrocarbons were released or generated from the samples during Rock Eval pyrolysis. Most probably maturation of outcrop samples occurred before Jurassic/Cretaceous formation of the Songliao Basin. However, an additional thermal overprint of Palaeozoic rocks might have occurred at the base of the depocenters of the Songliao Basin. Thus, despite of the high maturity, some gas in the Songliao Basin may be derived from Palaeozoic and Triassic rocks. The data of X-ray fluorescence analysis indicate a silciclastic-dominated hinterland with minor (ultra-)basic rocks.

KW - China Songliao Basin maturity vitrinite reflectance source rock Palaeozoic

KW - China Songliao Becken Maturität Vitrinitreflexion Muttergestein Paläozoikum

M3 - Diploma Thesis

ER -