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The fate of oil and gas in a constrained natural system - implications from the Bakken petroleum system

Technical Report:

Abstract

When petroleum is produced from its reservoir at present day, it has already been submitted to a complex array of natural processes, which have left their imprint on its chemical and physical properties. These processes involve the generation of petroleum in its source rock as a function of thermal evolution, and its migration to the reservoir. In order to achieve a better understanding of the effects that these processes have on the nature and occurrence of petroleum, it is crucial to investigate a study area that represents an integrated system encompassing all processes from the beginning of crude oil formation to entrapment. The Bakken Shale petroleum system of the Williston Basin (U.S.A./Canada) appears to fulfil these requirements as it covers a broad range of maturity incorporating all stages of catagenesis, and source and reservoir are closely associated, i.e. Bakken petroleum has not been submitted to long secondary migration routes. Combined with a basinwide uniformity in kerogen type, the latter feature constrains the broad scope of potential influences, and therefore the Bakken petroleum system is an ideal candidate to study petroleum generation, its expulsion and migration under natural conditions. By using a selected set of wells/core samples which were considered to  More>>
Authors:
Publication Date:
Jul 01, 1995
Product Type:
Technical Report
Report Number:
Juel-3094
Reference Number:
SCA: 020200; PA: DE-95:0GM098; EDB-96:012869; SN: 96001515205
Resource Relation:
Other Information: TH: Diss.; PBD: Jul 1995
Subject:
02 PETROLEUM; PETROLEUM; CATAGENESIS; ORIGIN; SOURCE ROCKS; MATURATION; SEDIMENTARY BASINS; NORTH AMERICA
OSTI ID:
159045
Research Organizations:
Forschungszentrum Juelich GmbH (Germany). Inst. fuer Chemie und Dynamik der Geosphaere 4: Erdoel und Geochemie; Technische Hochschule Aachen (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0944-2952; TRN: DE95GM098
Availability:
Available from FIZ Karlsruhe
Submitting Site:
DE
Size:
193 p.
Announcement Date:
Jan 18, 1996

Technical Report:

Citation Formats

Muscio, G P.A. The fate of oil and gas in a constrained natural system - implications from the Bakken petroleum system. Germany: N. p., 1995. Web.
Muscio, G P.A. The fate of oil and gas in a constrained natural system - implications from the Bakken petroleum system. Germany.
Muscio, G P.A. 1995. "The fate of oil and gas in a constrained natural system - implications from the Bakken petroleum system." Germany.
@misc{etde_159045,
title = {The fate of oil and gas in a constrained natural system - implications from the Bakken petroleum system}
author = {Muscio, G P.A.}
abstractNote = {When petroleum is produced from its reservoir at present day, it has already been submitted to a complex array of natural processes, which have left their imprint on its chemical and physical properties. These processes involve the generation of petroleum in its source rock as a function of thermal evolution, and its migration to the reservoir. In order to achieve a better understanding of the effects that these processes have on the nature and occurrence of petroleum, it is crucial to investigate a study area that represents an integrated system encompassing all processes from the beginning of crude oil formation to entrapment. The Bakken Shale petroleum system of the Williston Basin (U.S.A./Canada) appears to fulfil these requirements as it covers a broad range of maturity incorporating all stages of catagenesis, and source and reservoir are closely associated, i.e. Bakken petroleum has not been submitted to long secondary migration routes. Combined with a basinwide uniformity in kerogen type, the latter feature constrains the broad scope of potential influences, and therefore the Bakken petroleum system is an ideal candidate to study petroleum generation, its expulsion and migration under natural conditions. By using a selected set of wells/core samples which were considered to be representative for the entire Bakken petroleum system based on comprehensive screening analyses on both kerogen and bitumen, the present study focussed on the following principal aspects: (1) Evolution of petroleum generation as a function of maturation; (2) Primary migration and distribution of crude oil in a constrained natural system; (3) Occurrence of gas in the immature zone; (4) Evaluation of the natural maturity series with simulation experiments. (orig./HS) [Deutsch] Die Prozesse und Phaenomene der natuerlichen Bildung und Migration von Erdoel und Erdgas laufen waehrend der Katagenese sowohl zeitlich als auch raeumlich zu grossen Teilen parallel zueinander ab und praegen die Eigenschaften und das Verteilungsmuster der Kohlenwasserstoffe in den Speichergesteinen. Die Entwicklung von quantitativen geochemischen Modellen, die in der Lage sind, diese Prozesse zu charakterisieren, fuehrte zu einem besseren Verstaendnis der Erdoelgenese und -migration. Trotzdem ist es in hohem Masse erforderlich, anhand eines natuerlichen Erdoelsystems umfassend und detailliert Einblick zu gewinnen in die Zusammensetzung des organischen Materials, in Phasenbeziehungen (Sedimentphase/Fluidphase), sowie in die rheologischen Eigenschaften des Kohlenwasserstoffbildungs- und Transportsystems, um die Prozesse der Bildung, Migration und Speicherung von Erdoel und Erdgas besser zu verstehen. Diese Vorgabe setzt natuerlich voraus, dass das ausgewaehlte Untersuchungsgebiet ein integriertes System darstellt, welches alle Prozesse umfasst vom Einsetzen der Genese der Kohlenwasserstoffe bis zu ihrer Speicherung. Das Bakken-Erdoelsystem des Williston Basin (U.S.A./Kanada) besitzt Attribute, die es als ein derartiges integriertes System auszeichnen. Die Muttergesteinsproben, die ausschliesslich Bohrkernen entnommen werden, sowie die Rohoelproben wurden in der vorliegenden Studie einer eingehenden Untersuchung und Analytik unterworfen mit der Zielsetzung, folgende Aspekte zu beleuchten: Entwicklung der Erdoel- und Erdgasgenese in Abhaengigkeit der Reifezunahme; Primaere Migration und Verteilung von Rohoel in einem eingeschraenkten natuerlichen System; Vorkommen und Entstehung von Gasen in unreifen Muttergesteinen; Vergleich der natuerlichen Reifesequenz mit simulierten Reifungsexperimenten im Labor. (orig./HS)}
place = {Germany}
year = {1995}
month = {Jul}
}