Evaluating Laminated Sequences

Course Duration: 2 days, including lecture-based modules and hands-on exercises

Who Should Attend: Development and exploration geologists, geophysicists, petrophysics and log/core analysts, reservoir and drilling engineers, managers, and technical personnel

Course Summary: Laminated sequences occur in many depositional systems, including fluvial, deepwater turbidites, eolian, etc., and represent a class of low-resistivity, low-contrast pay, often leading to bypassed pay. We examine the depositional environment of laminated sequences and their influence on petrophysical and seismic datasets. Participants will be exposed to the cutting-edge of laminated sequence petrophysics, including modern 3D array resistivity tools, wireline and LWD log analysis, and so forth, with extensive practical exercises from diverse environments around the world.

Tentative Topics:

• Depositional environments yielding laminated sequences, including turbidites, fluvial, aeolian, and more.
• Clay/shale occurrence in reservoir rocks related to depositional environment and diagenesis, with focus on laminated sand-shale sequences.
• Review of log interpretation techniques in clean formations.
• Causes of low-resistivity, low-contrast in hydrocarbon bearing shaly-sand reservoirs and other laminated sequences and identification of pay zones.
• Use of and integration of advanced logs and techniques—NMR, wireline (e.g. FMI) and LWD image logs, array induction tools (including 3D resistivity), LWD propagation resistivities (including azimuthal propagation resistivity) and modeling.
• Methods of shale content (Vsh) and shale distribution (including Vlam) evaluation.
• Petrophysical models for effective porosity and saturation determination.
• Case studies (global and domestic).