Types of Well Logs
With well logs serving so many purposes, there are various types of well logs that suit each purpose. Here is a list of just some of the types of well…
Definition of Well Logging
Did you know that in a lot of areas people get their water from wells? Instead of getting water from a water company, they get water from a well that…
Fluid typing with NMR logging
Hydrocarbon typing and prediction of fluid properties by nuclear magnetic resonance (NMR) logs is predicated on reliable laboratory correlations between NMR measurements (i.e., relaxation times and diffusion) and fluid properties,…
Standard interpretation
Standard interpretation is the process of determining volumes of hydrocarbons in place from wireline logs, or log interpretation. This process requires four basic steps: Determine the volume of shale. Shale affects…
Radioactive tracer logging
The radioactive tracer-logging tool has a reservoir to hold radioactive material and a pump section at the top. For injection-well logging, two gamma ray detectors below the reservoir and pump…
Nuclear magnetic resonance (NMR) logging
Nuclear magnetic resonance (NMR) has been, and continues to be, widely used in chemistry, physics, and biomedicine and, more recently, in clinical diagnosis for imaging the internal structure of the…
Casing inspection logs
Casing failure can be caused by: · Deformation · Physical wear · Corrosion Preventing such failures is critical to maintaining well production. Casing inspection logs There are four commonly used techniques for the…
Types of logs
Over time, many different types of logs have been developed to collect data about wellbores and subsurface formations. This article provides an overview of how various log types correspond to…
Fundamentals of production logging
Ideally we would like to measure radial inflow rates using a cheap and accurate sensor. Unfortunately no such sensor exists. Alternatively we could measure the axial flow rate in a…
Production logging
While most types of logs are used to characterize the wellbore, formation, and fluids prior to well completion, a number of logging tools are available to provide information during production…
