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The assessment of the natural temporal variability of source rock units is critical for the understanding of petroleum systems as changes in mineral matrix, organic matter (OM) concentration, and composition can significantly affect expulsion efficiency, primary and secondary migration processes, hydrocarbon quality as well as oil source rock correlation. Already small-scaled fluctuations within sediment successions can critically influence migration efficiency. High-resolution investigation of a well-preserved Lower Jurassic drill core (Toarcian Posidonia Shale) revealed seven discrete and systematic intervals of deviating source rock quality. These were composed of homogenized, non-laminated marls of light grey color, opposed to laminated dark grey background sedimentation. Both lithotypes differentiate not only in mineral composition, but particularly in OM content and quality. An average TOC content of app. 3.9 wt.% reached by the grey marl, is faced by an average TOC content of app. 7.8 wt.% measured for the laminated dark grey marls. Average hydrogen index for grey non-laminated marls was app. 550 mg HC/g TOC, whereas much higher source rock quality with 780 mg HC/g TOC was attained in the dark laminated marls. The marls lower OM concentration and inferior OM quality generates important domains for preferential migration of products, originated from the dark grey layers, or hydrocarbon cluster in case of limited migration into adjacent reservoirs. To assess the potential for preferential intake of hydrocarbons by the coarser-grained light marls and their qualification as migration avenues, artificial maturation experiments were performed with both lithotypes. Hydrocarbon generation was simulated by hydrous pyrolysis in two successive temperature steps 330 °C and 360 °C, covering an early maturity stage, as well as the end of the oil window. Both lithologies show striking differences, not only for the extract yield, but also for the timing of generation. OM quality differences were reflected by variable n-alkane distributions and molecular maturity parameters. High-resolution continuous data produced by non-destructive techniques allows to draw conclusions on i) source rock potential, ii) expulsion and migration processes , and iii) on prediction of petroleum accumulation within the sediment succession. High-resolution investigation in combination with artificial maturation experiments represent an easy-to-use tool in petroleum system analysis.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/sd-Assessment-of-Temporal-Source-Rock-Variability-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Assessment of Temporal Source Rock Variability: An Example from the Lower Jurassic Posidonia Shale
 

The driving forces for conventional accumulations (structural or stratigraphic traps) are Forces of Buoyancy which are due to differences in densities of hydrocarbons and water. In contrast, the driving forces for unconventional tight accumulations are Forces of Expulsion which are produced by high pressures. That is an enormous difference and creates unconventional petroleum systems that are characterized by very different and distinctive characteristics. The Force of Expulsion pressures are created by the significant increase in volume when any of the three main kerogen types are converted to hydrocarbons. At those conversion times in the burial history, the rocks are already sufficiently tight so the large volumes of generated hydrocarbons cannot efficiently escape through the existing tight pore system, thus creating a permeability bottleneck that produces an overpressured compartment over a large area corresponding to the proper thermal oil and gas maturities for that basin. The forces initially created in these source rocks can only go limited distances into adjacent tight reservoirs (clastics or carbonates) above or below the source. The exact distance will vary depending on the pressure increase, matrix permeability, and fractures of that specific tight reservoir system. In general, the distances are small, in the orders of 10s to 100s of feet for oil and larger for more mobile gas systems. Those exact distance numbers are subject to ongoing investigations.  

A plot of the pressure data versus elevation for a given formation is critical in determining whether an accumulation is conventional or unconventional. Conventional accumulations will have hydrocarbon columns of 10s to 100s of feet with the pressure in the hydrocarbons and that in the water equal at the bottom of the accumulation (at the HC-water contact). In contrast, the unconventional accumulations will show HC column heights of 1000s of feet with the pressure in the hydrocarbon phase and the water phase being the same at the top of the accumulation (at the updip transition zone). Those significant differences are critical for understanding and differentiating these two play types. Because the system is a pore throat bottleneck with very little or minimum lateral migration, the type of hydrocarbon s are closely tied to the thermal maturity required to generate those hydrocarbons. Thus the play concept begins with two important geochemical considerations: (1) where are the source rocks and what are the kerogen types and organic richness (TOC), and (2 ) where are they mature in the basin for oil, condensate, and gas in the basin. These parameters will very quickly define the fairway for the play. Then one has to add the critical information on the reservoirs themselves: composition (brittleness), thickness, and reservoir quality (matrix porosity and permeability). In summary, these tight unconventional petroleum systems (1) are dynamic , and (2) create a regionally inverted petroleum system with water over oil over condensate over gas for source rocks wit h Type I or II kerogen types.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/sd-Our-Current-Working-Model-for-Unconventional-Tight-Petroleum-Systems-Oil-and-Gas-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Our Current Working Model for Unconventional Tight Petroleum Systems: Oil and Gas
 

The AAPG European Regional Conference, “Hydrocarbons in the Mediterranean: revisiting mature plays and understanding new and emerging ideas,” will be held Jan. 18-19 in Larnaca, Cyprus.

American Association of Petroleum Geologists (AAPG)
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To explore and develop unconventional petroleum resources, our focus should be on improving Knowledge, Technology, and a deeper comprehension of the natural processes controlling their existence.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_site/AAPG-newlogo-vertical-morepadding.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true The Curious Case of Petroleum-Expulsion Fractures in Organic-Rich Shales: Genesis and Impact on Unconventional Pervasive Petroleum Systems
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-integrated-seismic-and-well-log-analysis-of-gas-hydrate-prospects-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Integrated Seismic and Well Log Analysis of Gas Hydrate Prospects
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-indian-national-gas-hydrate-program-expedition-02-technical-contributions-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Indian National Gas Hydrate Program Expedition 02 Technical Contributions
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-gas-hydrate-petroleum-system-analysis-in-marine-and-arctic-permafrost-environments-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Gas Hydrate Petroleum System Analysis in Marine and Arctic Permafrost Environments
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-arctic-and-marine-gas-hydrate-production-testing-lessons-learnedp-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Arctic and Marine Gas Hydrate Production Testing – Lessons Learned
 

The Petroleum Geochemistry Toolkit for Petroleum Exploration and Development 2-day course, is designed to provide the geologist, geophysicist, and engineer with a general understanding of applied petroleum geochemistry and how it can be used in petroleum exploration and development. The petroleum systems analysis examines geological elements and processes that are essential for the petroleum accumulation.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/blog-learn-petroleum-geochemistry-toolkit-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Short Course | 3-4 October 2016 | Houston, Texas, United States The Petroleum Geochemistry Toolkit for Petroleum Exploration and Development
 

Where is the oil? How much is there? and What is the best strategy for recovery?

These are a few of the questions that we'll answer at the Making Money with Mature Fields - Geosciences Technology Workshop, October 5-6, 2016, Houston, TX. The goal of this workshop is to review mature fields and to identify the amount and nature of oil that can be recovered, and to evaluate competing strategies for economically producing the remaining reserves. In addition to looking closely at fields, we will review new and improved technologies that may help revitalize reservoirs and overcome problems such as low pressure, paraffin, corrosion, and more.

Show more American Association of Petroleum Geologists (AAPG)
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In-Person Training
Cape Town Western Cape South Africa 20 June, 2017 23 June, 2017 38348 Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-ar-exploration-and-development-of-unconventional-hydrocarbon-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Alternative Resources, Coal, Business and Economics, Economics, Resource Estimates, Risk Analysis, Engineering, Development and Operations, Conventional Drilling, Infill Drilling, Drive Mechanisms, Production, Depletion Drive, Hydraulic Fracturing, Primary Recovery, Secondary Recovery, Gas Injection, Water Flooding, Tertiary Recovery, Chemical Flooding Processes, Miscible Recovery, Thermal Recovery Processes, Reservoir Characterization, Environmental, Ground Water, Monitoring, Natural Resources, Pollution, Water Resources, Geochemistry and Basin Modeling, Basin Modeling, Maturation, Migration, Oil and Gas Analysis, Oil Seeps, Petroleum Systems, Source Rock, Thermal History, Oil Shale
 
Cape Town, Western Cape, South Africa
20-23 June 2017

This workshop provides the opportunity to learn and discuss the latest knowledge, techniques & technologies applied to unconventional reservoirs which can be utilized to explore for and develop these reservoirs. The workshop will provide a set-up for networking, interacting & sharing expertise with fellow petroleum scientists interested in developing and producing unconventional hydrocarbon resources.

Cape Town Western Cape South Africa 22 June, 2017 23 June, 2017 38474 Desktop /Portals/0/PackFlashItemImages/WebReady/fs-the-karoo-basin-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Alternative Resources, Geochemistry and Basin Modeling, Business and Economics, Engineering, Environmental, Basin Modeling, Source Rock, Migration, Petroleum Systems, Thermal History, Oil Seeps, Oil and Gas Analysis, Maturation, Resource Estimates, Risk Analysis, Economics, Reservoir Characterization, Development and Operations, Production, Oil Shale, Coal, Conventional Drilling, Infill Drilling, Hydraulic Fracturing, Primary Recovery, Secondary Recovery, Water Flooding, Gas Injection, Tertiary Recovery, Chemical Flooding Processes, Thermal Recovery Processes, Miscible Recovery, Drive Mechanisms, Depletion Drive, Ground Water, Water Resources, Monitoring, Pollution, Natural Resources
 
Cape Town, Western Cape, South Africa
22-23 June 2017

Led by De Ville Wickens (Geo-Routes Petroleum, Cape Town) and Doug Cole (Council for Geoscience, Bellville)

Participants of this field excursion will be introduced to the stratigraphy of the southwestern Karoo Basin by visiting the prime outcrop areas of the Dwyka and Ecca Groups in the Laingsburg and Tanqua Karoo regions. The southwestern Karoo Basin hosts a considerable amount of information on glaciogenic, deep-water and deltaic sedimentation with present day erosion allowing 3D-viewing of laterally continuous (tens of kilometres) outcrops. The Ecca Group in these areas, for example, hosts the world's best examples of deep-water basin floor to slope fan complexes, making it the most sought after “open air laboratory” for studying fine-grained deep-water sedimentation.

The objective of this field trip is to gain a better understanding of the tectono-sedimentary history and stratigraphic evolution of southwestern part of the Karoo Basin, basic depositional processes, facies development, controls on sedimentation patterns and post-depositional diagenetic and structural changes. It further aims to integrate different scales of observation and interpretation, namely the basin (exploration) and the development and production scale (facies distribution and bed-scale stratigraphy). This two-day field trip will focus on show-casing the glaciogenic Dwyka Group, and the Prince Albert and Whitehill Formations of the Ecca Group, which are main targets for shale gas development in South Africa.

Rio de Janeiro Brazil 22 August, 2017 23 August, 2017 38190 Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-lacr-optimization-of-e-p-projects-integrating-geosciences-and-engineering-from-block-acquisition-through-production-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Development and Operations, Engineering, Infill Drilling, Directional Drilling, Coring, Conventional Drilling, Reservoir Characterization, Geochemistry and Basin Modeling, Basin Modeling, Petroleum Systems, Geophysics, Seismic, Petrophysics and Well Logs, Fractured Carbonate Reservoirs, Stratigraphic Traps, Subsalt Traps
 
Rio de Janeiro, Brazil
22-23 August 2017

AAPG and ABGP invite you to participate in an interactive, multidisciplinary workshop featuring presentations and discussions exploring opportunities to improve companies’ efficiency and effectiveness throughout the E&P cycle, from block acquisition and exploration to development and production.

Marrakech Morocco 01 November, 2017 04 November, 2017 37903 Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-afr-the-paleozoic-hydrocarbon-potential-of-north-africa-past-lessons-and-future-potential-2017-17apr17-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Engineering, Development and Operations, Production, Infill Drilling, Geochemistry and Basin Modeling, Petroleum Systems, Source Rock, Thermal History, Geophysics, Clastics, Sedimentology and Stratigraphy, Conventional Sandstones, Sequence Stratigraphy, Structure, Compressional Systems, Extensional Systems, Tectonics (General), Deep Basin Gas, Stratigraphic Traps, Structural Traps
 
Marrakech, Morocco
1-4 November 2017

This workshop provides the opportunity to learn and discuss the latest knowledge, techniques & technologies applied to petroleum reservoirs in the Paleozoic of North Africa which can be utilized to explore for and develop these reservoirs. The workshop will provide a set-up for networking, interacting & sharing expertise with fellow petroleum scientists interested in developing and producing hydrocarbon resources within the Paleozoic of North Africa.

Georgetown Barima-Waini Guyana 09 November, 2017 10 November, 2017 38161 Desktop /Portals/0/PackFlashItemImages/WebReady/sc-lacr-reservoir-characterization-of-deep-water-systems-impact-from-exploration-to-production-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Business and Economics, Risk Analysis, Production, Engineering, Primary Recovery, Secondary Recovery, Geochemistry and Basin Modeling, Petroleum Systems, Petrophysics and Well Logs, Clastics, Sedimentology and Stratigraphy, Conventional Sandstones, Deep Sea / Deepwater, Deepwater Turbidites, Low Stand Deposits, Marine, Regressive Deposits, Slope, Structure, Tectonics (General), Deep Basin Gas, Shale Gas, Stratigraphic Traps, Tight Gas Sands
 
Georgetown, Barima-Waini, Guyana
9-10 November 2017

This course emphasizes key changes in reservoir models that have a major impact in exploration and production of these reservoirs. The course will include lectures, exercises, and observations from cores, well logs and seismic profiles. Participants will learn how to interpret and map environments of deposition (EoD’s) in deep water systems and understand how the different EoD’s and sub-EoD’s behave as reservoirs.

Victoria Island Lagos Nigeria 08 February, 2018 09 February, 2018 38212 Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-ar-enhancing-mature-fields-life-cycles-hero-v2.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Business and Economics, Economics, Reserve Estimation, Risk Analysis, Development and Operations, Engineering, Infill Drilling, Production, Drive Mechanisms, Water Drive, Hydraulic Fracturing, Primary Recovery, Secondary Recovery, Gas Injection, Water Flooding, Tertiary Recovery, Chemical Flooding Processes, Thermal Recovery Processes, Reservoir Characterization, Geochemistry and Basin Modeling, Basin Modeling, Petroleum Systems, Petrophysics and Well Logs, Sedimentology and Stratigraphy, Clastics, Structure, Extensional Systems, Diagenetic Traps, Stratigraphic Traps, Bitumen/Heavy Oil
 
Victoria Island, Lagos, Nigeria
8-9 February 2018

This workshop provides the opportunity to learn and discuss the latest knowledge, techniques & technologies applied to mature fields. The workshop will provide a set-up for networking, interacting & sharing expertise with fellow petroleum scientists interested in enhancing production from maturing fields in the Niger Delta and similar deltaic settings.

Online Training
28 April, 2011 28 April, 2011 1471 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-niobrara-petroleum-system-a-major-tight-resource-play.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
28 April 2011

The Niobrara Petroleum System of the U.S. Rocky Mountain Region is a major tight petroleum resource play.

09 December, 2010 09 December, 2010 1466 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-bakken-petroleum-system-of-the-williston-basin.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
9 December 2010

The Mississippian-Devonian Bakken Petroleum System of the Williston Basin is characterized by low-porosity and permeability reservoirs, organic-rich source rocks, and regional hydrocarbon charge.

14 February, 3000 14 February, 3000 7817 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-generic-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
Request a Visit
 

Request a visit from Timothy S. Collett!

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