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Rock-Eval hydrogen index (HI) is often used to compare relative maturities of a source horizon across a basin. Usually, there are several measurements from the source horizon at a single well, and the mean hydrogen index is calculated, or the S2 is plotted against TOC. The slope of the best fit line through that data is used as the representative HI for that well (sometimes referred to as the ‘slope HI ’ methodology). There is a potential flaw in both these methodologies; however, that renders the calculated HI as misleading if the source horizon being examined is not relatively uniform in source quality, vertically in the stratigraphic column. From a geologic perspective, it would be unusual for the source rock quality not to vary vertically in the stratigraphic column. Organic matter input, preservation, dilution, and sediment accumulation rate typically vary in many depositional environments over the millions of years required to create a thick source rock package. Nevertheless, there are source rocks which do display remarkable source-quality uniformity from top to bottom of the stratigraphic package. We have examined source rocks from several basins where the source quality is relatively uniform over the stratigraphic column, and source rocks where the source quality varies greatly over the stratigraphic column. Methodologies to assess hydrogen index at specific wells for the se two scenarios differ. Most geoscientists may not be familiar with why a single technique is not suitable for both these scenarios, or how to correctly use hydrogen index as a relative maturation proxy in the case where source rock quality is not uniform. We will demonstrate how to determine if your source rock quality is uniform or varied relative to HI over the stratigraphic column, and how to assign a hydrogen index to the different source facies when that source rock quality is not uniform. Further we will illustrate how to estimate the original hydrogen index of the different source facies and assign each a transformation ratio. The transformation ratio is a better proxy for relative maturity, since different source facies may have different present-day hydrogen indices, but their present-day transformation ratio should be quite similar.

Show more American Association of Petroleum Geologists (AAPG)
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The AAPG Annual Convention and Exhibition will feature a variety of field trips that will bookend the meeting, spanning from March 26 to April 8.

American Association of Petroleum Geologists (AAPG)
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Come for the GTW "Making Money with Mature Fields", and stay for a short course; either "The Petroleum Geochemistry Toolkit for Petroleum Exploration and Development" or "Carbonate Depositional Systems".  All three will explore new and innovative technologies and ideas to lend increased business opportunities now and into the future.

American Association of Petroleum Geologists (AAPG)
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Jean Hsieh, Normand Begin, Maz Qayyum, Talisman Energy Inc., part of the Repsol Group

The Kurdamir-Topkhana field of Kurdistan is a carbonate oil and gas reservoir that was deposited in a passive margin ramp setting during the Oligocene. It is dominated by alternations of grainstone/boundstone/rudstone and packstone/wackestone beds. Reflux dolomitization early in the Miocene has noticeably increased, in places, both the porosity and connectivity of at least the Upper reservoir interval, as interpreted from seismic inversion data. The Lower reservoir interval was less affected by dolomitization and exhibits good porosity development within individual clinoforms, but much poorer connectivity between clinoforms. The entire reservoir interval is located within two anticlinal four-way closures formed above the roof thrust of an anti-formal stack developed within deeper Mesozoic carbonates; much of the observed fracture network is a result of this deformation. Modelling this complex reservoir presents significant challenges, not least because of the interdependency of many of the reservoir’s key characteristics.

The depositional and diagenetic history of the reservoir was determined through the study of several cores cut from the wells drilled in the field along with an understanding of the regional setting. A 3D seismic survey was inverted for acoustic impedance and the presence of gas-filled porosity can be imaged through the AI volume. Combining the understanding gleaned from the core and seismic data with the fracture data from borehole image logs, a detailed reservoir model was built. The strategy and conceptual models used for building this geostatistical model will be presented, along with our interim products and the lessons we have learned thus far on combining data of different scales.

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AAPG is excited about presenting THREE Short Courses in four days!

  • Basic Seismic Interpretation   17-18 May 2016
  • "Old" (pre-1958) Electric Logs: A Quick Review 19 May 2016
  • Quick Guide to Carbonate Well Log Analysis   20 May 2016
American Association of Petroleum Geologists (AAPG)
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Have you made plans to attend ACE this year? AAPG’s 2016 Annual Convention and Exhibition (ACE) is a dedicated opportunity for our members and other professionals to get together.

American Association of Petroleum Geologists (AAPG)
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In-Person Training
El Paso Texas United States 05 April, 2017 08 April, 2017 36585 Desktop /Portals/0/PackFlashItemImages/WebReady/ace17-ft-08-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true SEPM, Field Trips, Conventions, Post-Convention, Sedimentology and Stratigraphy, Sequence Stratigraphy, Clastics, Slope
 
El Paso, Texas, United States
5-8 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
The field trip will include stops at Shumard Canyon and Bone Canyon to observe the scale and internal architecture of submarine channels incising the bedrock of the relict platform. Other field-trip stops will include Stratotype Canyon, Black Stove Canyon, and Rest Area Gully to observe basin-restricted carbonate and siliclcastic sediment gravity flow deposits, carbonate channel-levee complexes, failure scours associated with the downslope transport of olistostromal blocks, and thick (>50 m) accumulations of recumbently folded deposits associated with these failure events.

Houston Texas United States 01 April, 2017 02 April, 2017 35008 Desktop /Portals/0/PackFlashItemImages/WebReady/ace-sc-10-sequence-stratigraphy-for-graduate-students-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Conventions, Short Courses, Pre-Convention, Sedimentology and Stratigraphy, Sequence Stratigraphy
 
Houston, Texas, United States
1-2 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
This two-day short course is designed to teach graduate students the principles, concepts, and methodologies of sequence stratigraphy.

Houston Texas United States 06 April, 2017 07 April, 2017 35077 Desktop /Portals/0/PackFlashItemImages/WebReady/ace-sc-21-rock-seismic-sequence-expression-of-carbonate-systems-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Conventions, Short Courses, Post-Convention, Geophysics, Seismic, Sedimentology and Stratigraphy, Carbonates, Sequence Stratigraphy
 
Houston, Texas, United States
6-7 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
This two-day workshop provides an introduction to the application of carbonate facies, diagenesis, and seismic sequence stratigraphy to exploration and production. This includes marine, and conventional and unconventional carbonate reservoirs.

Houston Texas United States 01 April, 2017 02 April, 2017 35009 Desktop /Portals/0/PackFlashItemImages/WebReady/ace-sc-11-advanced-sequence-stratigraphic-applications-for-exploration-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Conventions, Short Courses, Pre-Convention, Geophysics, Seismic, Sedimentology and Stratigraphy, Sequence Stratigraphy
 
Houston, Texas, United States
1-2 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
This two-day short course is designed to teach graduate students the principles, concepts, and methodologies of sequence stratigraphy.

Houston Texas United States 06 April, 2017 06 April, 2017 36592 Desktop /Portals/0/PackFlashItemImages/WebReady/ace17-ft-10-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true SEPM, Sedimentology and Stratigraphy, Sequence Stratigraphy, Field Trips, Conventions, Post-Convention, Clastics, Fluvial Deltaic Systems
 
Houston, Texas, United States
6 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
This field trip focuses on the late Quaternary depositional systems of the upper Texas coast, including the Brazos River and its wave-dominated delta, the Oyster Creek meanderbelt, Follets Island, the San Luis Pass tidal delta, and Galveston Island. The trip will emphasize the physical processes associated with shaping these various depositional environments, and will discuss the stratigraphic occurrence of sand bodies associated with these coastal systems. There will be a focus on linking physical processes to the geological record, and also describing the sequence stratigraphic framework of the upper Texas coastal systems.

Houston Texas United States 01 April, 2017 01 April, 2017 34926 Desktop /Portals/0/PackFlashItemImages/WebReady/ace-sc-03-sequence-stratigraphic-analysis-of-shales-and-mudstones-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Short Courses, Conventions, Pre-Convention, Geochemistry and Basin Modeling, Source Rock, Oil Shale, Shale Gas, Sedimentology and Stratigraphy, Sequence Stratigraphy
 
Houston, Texas, United States
1 April 2017

In Conjunction with AAPG 2017 Annual Convention & Exhibition (ACE)
This course is designed for geologists who interpret fine-grained rocks, explore for or develop conventional hydrocarbons, shale gas or oil shale

Online Training
10 May, 2012 10 May, 2012 1486 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-genetic-sequences-in-eagle-ford-austin.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
10 May 2012

Recognition and Correlation of the Eagle Ford, Austin Formations in South Texas can be enhanced with High Resolution Biostratigraphy, fossil abundance peaks and Maximum Flooding Surfaces correlated to Upper Cretaceous sequence stratigraphic cycle chart after Gradstein, 2010.

17 February, 2011 17 February, 2011 1469 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-siliclastic-sequence-stratigraphy.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
17 February 2011

This presentation is designed for exploration/production geologists and geological managers or reservoir engineers.

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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