Abstract
It is a great interest for petrophysicists and geochemists to understand kerogen models in order to determine thermal maturity and hydrocarbon potential of organic-rich source rocks. In this talk, we will describe a series of NMR 1-D and 2-D experiments, and data processing techniques that can be applied to various types of source rocks with emphasis on short NMR T2 components which are associated with kerogen, heavy hydrocarbons, and small hydrocarbon molecules bound in nano-pores. The results show that the traditional NMR T2 measurement is unable to detect and measure the very rigid solid components that have the T2’s shorter than 30 microseconds. Such very short T2 signals are typically from kerogen and bound hydrocarbons, which cause uncertainty in traditional T2 measurements when the inter-echo spacing time (TE) is short. The 1-D NMR signals were acquired using the solid echo pulse sequence and fitted into a composition of a Gaussian plus exponential functions to better describe NMR responses of source rocks with the shortest relaxation time of a few microseconds. The Gaussian component in the NMR signal is the measure of rigid solids associated with kerogen in the source rock. Model rock samples of thermally-immature outcrops were used for comparison studies between the low field solid NMR techniques and geochemical analytical methods. The thermal maturities of the samples were artificially altered through the hydrous pyrolysis method at selected temperatures. The comparison results show that the amplitude of the Gaussian component measurement by NMR strongly correlated with the S2 of pyrolysis. The NMR relaxation times of the solid portion are directly proportional to the thermal maturity determined by organic petrography. This study concludes that the non-destructive solid NMR method provides an alternative and rapid way to study solid organic matters. The combined techniques enable us to further study kerogen models and hydrocarbon generating potentials in organic-rich source rocks. Because of the nature of this type of NMR instrument settings, small sizes (less than 0.5”) of rock samples or drilling cuttings are well fitted for the analysis
Speaker Biography
Harry Xie is NMR Senior Advisor at Core Laboratories. He received his PhD in Physics from the University of Kent at Canterbury, UK, in 1994 and worked as a research fellow for both the University of Surrey and the University of Kent on an industrial project to build an online NMR system for quality control purposes. Dr. Xie has spent several years working as a Product Specialist to develop and support laboratory NMR products (MARAN product line) at Resonance Instruments Ltd., UK. He has also spent time at Bruker as the Senior Applications Scientist in the Time Domain division, Technical Director of the Time Domain products for Asia Pacific, and General Manager of Bruker Optics China. Dr. Xie has been focusing on developing new NMR techniques, permeability models, and petrophysical data processing for tight mudstones such as oil and gas shales since he joined Core Lab in November 2012. He is the current president of the NMR SIG of SPWLA.
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When
Tuesday, May 25, 2021
11:00 am - 12:00 pm
Cost
At this time we are not going to charge anything for these webinars. We reserve the right to change this in the future.
Webinar reservation: 
Forward this newsletter to a friend to invite them to the webinar.
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From the President
Yulia Faulkner
Dear Members and Friends of the DWLS,
This will be my last message to DWLS members for this 2020/2021 season, as we say our goodbyes for the summer break. I am happy to announce that I will continue to be DWLS President for the upcoming 2021/2022.
COVID-19 has changed the DWLS world we used to live in, for the safety and well-being of our members we had to make all our 2020/2021 luncheons and workshops to be remote. We hosted successfully 9 DWLS luncheons, 2 DWLS workshops, and an MiT talk, something we have never done before. We hope that during these difficult times the innovative solutions that DWLS came up with still delivered great value to our members. Thank you all so much for sticking around with DWLS, for attending luncheons and workshops, for Presenting at DWLS events, and for your continuing support to our community.
I want to thank all the DWLS Board for making this year as successful as it could be. I am truly honored to be part of it and work with highly motivated, energy-driven Board members.
I very much look forward to the 2021/2022 DWLS season, as we hope to have our events in person.
Enjoy summer break, get outside for some fresh air and beautiful CO nature, stay safe and healthy and we will see you in September.
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From the VP - Technology
Jenny LaGesse
Wrapping up our 2020-2021 season, I want to express special thanks to all of you for your continued support and participation throughout this challenging time. This year DWLS launched our first webinar luncheon series in response to the social safety measures required by the pandemic. Thank you for virtually showing up month after month to listen to eleven speakers, one holiday party, one MiT talk, and our annual spring workshop. We featured local Denver experts as well as international guests, had great attendance and Q&A sessions, and received positive feedback on the new format. We were very pleased to be able to offer these luncheons at no cost, but none of them would have been possible without all of you logging on in an ever-increasingly webinar weary world. Although we are still unsure what our 2021-2022 luncheons will look like, we are hopeful we will all be together again sooner rather than later.
I also want to acknowledge the hard work and resilience of my fellow DWLS board of director members. Like you, they all were impacted large or small by the pandemic, but kept calm and carried on our mission to serve the Denver petrophysical community. I hope you’ll join me in welcoming our new board members as we transition to the next year.
Our April webinar with Luis Stinco (Olempetra) was our best attended online luncheon to date. His presentation on deductive vs inductive formation evaluation methodologies was an insightful overview of petrophysical analysis.
After being canceled for 2020, the Spring Workshop was back on April 29th. Our nine speakers presented an all-day workshop on horizontal petrophysics to an engaged audience. We were excited to have three SPWLA Distinguished Speakers among our panel discussing tools, reservoir characterization applications, and interpretation techniques specific to high-angle formation evaluation.
Our final talk for this season is on May 25th and features Harry Xie (Core Laboratories) and his presentation "Characterization of Kerogen and Solid Organics of Unconventional Source Rocks Using Solid-Type 20MHz NMR Techniques.” His abstract and bio are included in this newsletter. Please note that this will be held is a week later than our usual meeting, to accommodate the SPWLA meeting the week prior. The talk is free, but you must register to attend.
Register here: https://attendee.gotowebinar.com/register/7515645073893961742
After our summer break, we’ll be back in September with a new lineup of speakers, events, and a new look – the DWLS website is getting an update! Sign up for the newsletter by emailing VP_Membership@dwls.spwla.org, so you don’t miss anything. Your feedback is important – what topics or speakers would you like to hear more from next year? Please send your thoughts and suggestions to VP_Technology@dwls.spwla.org. Stay well and see you soon!
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Calendar of Events
Click the calendar to the right to view events on the web.
Other Important Events
2021 SPWLA Annual Symposium, May 15-19, 2021 (Boston,MA) - Note this will be held virtually
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DWLS Sponsors
Click here to view the sponsors on the website, or click on any image to contact a sponsor.
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Chapter Statistics
Statistic
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This Year
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3-Year Average
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| # of Active members * |
279 |
348 |
| # that are New members |
1 |
15 |
| # that are Students * |
7 |
7 |
| # that are Lifetime Members * |
260 |
263 |
| September luncheon meeting attendance |
49 |
48 |
| October luncheon meeting attendance |
31 |
37 |
| November luncheon meeting attendance |
42 |
32 |
| Holiday party attendance |
30 |
21 |
| January luncheon meeting attendance |
56 |
48 |
| February luncheon meeting attendance |
36 |
60 |
| March luncheon meeting attendance |
50 |
35** |
| April luncheon meeting attendance |
80 |
29** |
| May luncheon meeting attendance |
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64 |
* Note that we did a thorough cleanup of bad email addresses that resulted in some of our members being removed until they can be tracked down again. So this year's membership numbers are going to be a bit lower.
** These numbers are skewed due to COVID-19 luncheon cancellations.
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The DWLS Newsletter is published monthly September through June by the Denver Well Logging Society. For information on membership or advertising, contact the editor. For other inquiries, contact a member of the Board of Directors.
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