Modeling and Correcting the Impact of the Rate of Penetration on LWD NMR Measurements: Addressing Over-Polarization and Motion Induced Decay Effects
Westside Houston
Speaker:
Seminar Date: Feb 13 2025
Registration Opens: Oct 17 2024 - Feb 14 2025
Time: 11:30 AM - 01:00 PM (US CDT)
Admission/Registration Link: None
Donation Link: None
Meeting/Webinar Link: None
Contact: QinShan “Shan” Yang (VP Westside, SPWLA Houston Chapter)
Corresponding: vpwestside@spwla-houston.org
Fees: FREENOTES:
Speaker : Zeyad Ramadan (SLB)
Date : Thursday, Feb 13th , 2025
Time : 11:30 am – 1:00 pm (US CDT)
Venue : SLB, 6350 West Sam Houston Parkway North, Houston, TX 77041
Admission : This activity will include a boxed lunch.
The seminar is sponsored by SLB so there
is no charge for registration,
However, you still need to register using
the applicable links below.
Parking Info : Guest parking is available free of charge. Upon arrival, please proceed to the front desk to check in
Please register by Feb 12th, 2025 @ 11am to reserve lunch using the above provided link.
Contact : QinShan (Shan) Yang (SPWLA Houston VP Westside)
Corresponding :vpwestside@spwla-houston.org
ABSTRACT:
The effect of axial motion, particularly the rate of penetration (ROP), on Logging While Drilling (LWD) Nuclear Magnetic Resonance (NMR) measurements poses significant challenges in ensuring measurement accuracy during well logging. This is because the physics of a moving NMR tool differs from that of a stationary one. At high logging speeds, NMR tools experience over-polarization and motion-induced decay when logging formations with slow longitudinal and transverse relaxation times (T1 & T2). However, since the physics and mathematics of these effects are well understood, the impact of logging speed can be modeled and corrected. This talk will explore the underlying physics of the ROP effect and how it can be accurately modeled and compensated for to improve measurement reliability.
BIOGRAPHY:
Zeyad J. Ramadan is a Principal Petrophysicist at the SLB Houston Formation Evaluation Center. He has held various roles in borehole geology, well placement, petrophysics, and answer product development across several countries, including Libya, Qatar, Egypt, France, Kuwait, and the USA. He earned his MSc in Earth Science from Benghazi University in 2008. Zeyad’s current work focuses on petrophysical answer product development.