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Logging While Drilling (LWD)
Acquisition, Processing, and Interpretation
Q. (John) Zhou and John Rasmus

Over the past two decades, LWD has progressed from research interests to wide acceptance around the globe. Annual LWD revenue has also grown to well over one billion-dollars. LWD data acquisition, processing, and interpretation are quite unique as compared to wireline services. The majority of LWD logs are acquired in highly deviated wells in which the characteristics of logging tool responses are significantly different from those seen in vertical wells.

This short course will cover a whole spectrum of LWD measurement and interpretation issues, from LWD history, sensor physics, response characteristics, and field applications, to future developments.

Even though LWD is being widely used, it is acknowledged that its true potential has not been fully developed and utilized. Some unique insights into future developments will be shown, including an analysis of what is resolvable and what is not and the desired new technologies for various exploration and development scenarios.

Course content
- History of MWD/LWD.
Review how it progressed to today's technology and its applications.
- Measurement technologies.
GR – Resistivity. GR and resistivity are the bread-and-butter in MWD/LWD.
Density and neutron. High deviation well compared to vertical ones.
Image tools. GR, density, and/or resistivity images offer the geometric information for both steering and petrophysical interpretation.
Survey. Well positioning and its effect on formation evaluation.
Other technologies. Briefly on NMR, acoustic, formation tester, etc.
- Response characteristics.
Identify the response characteristics in MWD/LWD as compared to wireline logs.
Maximize the unique information (e.g. anisotropy) for better evolution.
Overcome the undesired artifacts in the responses.
- Applications.
Examples of MWD/LWD log interpretations.
Examples of MWD/LWD steering applications.
- Future developments.
What's (not) resolvable.
Desired new technologies.
- Summary.

Schedule and tuition
Venue: Sheraton Hotel Mar del Plata.
Duration: 1 day - November 15, 2005.
Course fee: U$S 150

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