Petrophysics starts with the understanding we are remotely sensing the subsurface of the basins we all explore. Understanding the geology and characterizing the reservoir using core data and outcrop analogues, then relating this interpretation back to the log data is critical. Starting with the basic logs (GR, Density, Neutron, Sonic, Resistivity, etc.) acquired through wireline and memory downhole tools, we will learn the physics behind each tool, and how each tool measures an aspect of the reservoir. Basic core data measurements will be used to assist in the log interpretation. Hands-on exercises will be used to describe the calculation of reservoir parameters (Vsh, Phit, Swt, etc.) commonly used in mapping of exploration plays. If time permits, we will explore more complex tools and readings. At the end, I hope everyone grasps exactly what the logs are reading in the subsurface and how each log curve is used in calculating petrophysical reservoir parameters.
This course is targeted to all geoscientists who want to learn how to interpret basic log curves and be able to relate them back to the reservoir they are exploring. Understanding of basic rock types (sandstone, limestone, dolomite, shale, etc.) and their constituent mineralogy and how pore space is represented in the subsurface will be required.
(portions of the course notes will need to be printed out for use in the exercises)
Lithofacies outcrop profile versus Gamma Ray and Shallow Resistivity logs showing simple pattern similarities starting as the basis before log interpretation. (after Krystinik and Balsley ca.1982)
The objective of this course is to educate the geoscience student on the proper use and interpretation of downhole well logs. Understand basic core measurements and integration of core data in the interpretation of well log data. At the end of the course the student will be able to identify each log curve by reading simple header material and use this data as an inference to describing the reservoir in the subsurface.
Log plot of basic downhole well logs (left to right, Gamma Ray track, depth track, formation tops, Porosity track, Resistivity track).
Who Should Attend:
Geoscience students currently enrolled in University who have a desire to learn downhole well logs and petrophysics.