What is well logging Slideshare?
Porosity, is ratio between volume of void to the total voids of the rock. Permeability, is ability of a porous material to allow fluids to pass through it. Electric, most of the sedimentary rocks don’t have conductivity.
What is geophysical well logging?
Geophysical well logging (borehole logging,) is a set of borehole investigation methods that are based on special logging tools. First developed in the beginning of the 20th century, well logging comprises today several tens of methods that involve measurements of natural or induced physical fields in the borehole.
How can you tell lithology from well logs?
Lithology is also determined from the logs, because each main reservoir lithology has characteristic responses. Frequently, lithologies are derived by pattern recognition of the GR-, density-, and neutron-log responses. Some subsequent delineation wells are likely to be cored over the entire of the reservoir interval.
What are logging methods?
There are three major groups of timber harvest practices; clearcutting, shelterwood and selection systems. While each are different and are applied to specific forest types, they have three things in common: They provide wood fiber for thousands of every-day products.
How do you identify lithology?
Neutron and density logs each react to both lithology and porosity, so by analyzing the two logs together, one can begin to distinguish lithology from porosity. Neutron and density logs, together with a caliper measurement recorded by the density tool and a natural gamma ray log, are commonly run as a combination.
What is logger method?
The log() method of Logger is used to Log a message. If the logger is currently enabled for the given message level which is passed as parameter then a corresponding LogRecord is created and forwarded to all the registered Output Handler objects.
What is lithology in well logging?
Lithology is a necessary first step in any complex log-analysis program. Conventional porosity-log crossplots scaled to mixtures of sandstone, limestone, or dolomite are usually adequate to identify single or dual mineral mixtures.
What does logger debug mean?
If you want to print the value of a variable at any given point, you might call Logger. debug . This combination of a configurable logging level and logging statements within your program allow you full control over how your application will log its activity.
What is the interpretation of the well log?
The interpretation of the well log includes both qualitative and quantitative evaluation.
How to get depth data from well logging jobs?
•A fundamental data from well logging jobs •Depth data has to be corrected for stretch in the cable, by the use of magnetic marks •Depth measured by the use of device, the data acquisition software is triggered by the depth signal, based on the specified sampling per foot.
What information is collected from a wellbore log?
As the tool string traverses the wellbore, the individual tools gather information about the surrounding formations. A typical open hole log will have information about the density, porosity, permeability, lithology, presence of hydrocarbons, and oil and water saturation.
What are the different types of well logging jobs?
Types of Well Logging Jobs •Open Hole Jobs (Immediately after drilling the interval, before setting the casing) –Wireline Logging –Logging While Drilling (LWD) –Measurement While Drilling (MWD) •Cased Hole Jobs (Any logging after the casing has been set) –Cement Evaluation –Well Perforation –Corrosion Evaluation –Production Logs