How do neutron logs work?

The neutron log is sensitive mainly to the amount of hydrogen atoms in a formation. The tool operates by bombarding the formation with high energy neutrons. These neutrons undergo scattering in the formation, losing energy and producing high energy gamma rays.

What are the different types of porosity logs?

The “Porosity” logs. There are three types of logging tools that are used to estimate the amount of pore space in a rock: the neutron, density, and acoustic velocity (or sonic) tool.

What is the difference between density neutron and sonic logs?

High energy neutrons are slowed down by hydrogen atoms in water (or oil) and detected by tool • Porosity is function of rock type. Density tool • Gamma ray source. Porosity is function of rock type and density. Sonic tool • Measures speed of sound in formation.

What is PEF log?

1. n. [Formation Evaluation] A log of photoelectric absorption properties. The log measures the photoelectric absorption factor, Pe, which is defined as (Z/10) 3.6 where Z is the average atomic number of the formation.

What is wireline logging?

Wireline logging is the process of using electric instruments to continuously measure the properties of a formation, in order to make decisions about drilling and production operations. Wireline logging is the measurement of downhole formation attributes using special tools or equipment lowered into the borehole.

What is a wireline engineer?

A wireline engineer, or a wireline field engineer or just field engineer, is responsible for determining if a recently drilled oil or gas well contains recoverable amounts of resources before the well is cased. Further tests by cased-hole field engineers determine exact flow rates.

What are the types of logs?

Types of logs

Gamma ray logs.
Spectral gamma ray logs.
Density logging.
Neutron porosity logs.
Pulsed neutron lifetime logs.
Carbon oxygen logs.
Geochemical logs.

How many types of logs are there?

There are two types of logarithms: Common logarithm: These are known as the base 10 logarithm. It is represented as log10. Natural logarithm: These are known as the base e logarithm.

Which logs should be monitored?

Top 10 Log Sources You Should Monitor

1 – Infrastructure Devices. These are those devices that are the “information superhighway” of your infrastructure.
2 – Security Devices.
3 – Server Logs.
4 – Web Servers.
5 – Authentication Servers.
6 – Hypervisors.
7 – Containers.
8 – SAN Infrastructure.

What is a system log?

The system log file contains events that are logged by the operating system components. These events are often predetermined by the operating system itself. System log files may contain information about device changes, device drivers, system changes, events, operations and more.

What are logs in testing?

The Test Log contains detailed information on all the executed tests, including all the script routines, keyword tests, low-level procedures, and so on. It contains the results of test operations in each test. It can also include images of the tested applications, links to files, and other entries.

Why is it called a log?

Logarithms were invented in the 17th century as a calculation tool by Scottish mathematician John Napier (1550 to 1617), who coined the term from the Greek words for ratio (logos) and number (arithmos).

What is a log txt file?

Answer: Files with “. log” and “. txt” extensions are both plain text files. This means they can both be viewed with a standard text editor like Notepad for Windows or TextEdit for Mac OS X. For example, when a software installer is run, it may create a log file that contains a log of files that were installed.

How do I check PEGA logs?

Each log is managed by an appender, which determines the type of events written to the log file. Pega manages logs based on the appender configuration in the prlog4j2. xml file for the node. In Dev Studio, logs are available from the Configure > System > Operations landing page.

Is it safe to delete log files on Android?

Log files are just the files which shows the activities performed on the day by your mobile within the instances of time so there is no harm if you to delete them.

How do I view putty logs?

Here I would like to share How To Capture PUTTY Session Log.

To capture a session with PuTTY, open up a PUTTY.
Look for Category Session → Logging.
Under Session Logging, choose «All session output» and key in your desire log filename (default is putty. log).

How do I check Autosys logs?

Scheduler and Application Server logs: (default) /opt/CA/WorkloadAutomationAE/autouser.

How do I check SSH logs?

By default sshd(8) sends logging information to the system logs using the log level INFO and the system log facility AUTH. So the place to look for log data from sshd(8) is in /var/log/auth. log. These defaults can be overridden using the SyslogFacility and LogLevel directives.

How do I check logs in Unix?

Linux logs can be viewed with the command cd/var/log, then by typing the command ls to see the logs stored under this directory. One of the most important logs to view is the syslog, which logs everything but auth-related messages.

What generates Linux logs?

Debian-based systems like Ubuntu store this in /var/log/syslog , while Red Hat-based systems like RHEL or CentOS use /var/log/messages . /var/log/auth. log and /var/log/secure store all security-related events such as logins, root user actions, and output from pluggable authentication modules (PAM).

How do I read a log file?

Because most log files are recorded in plain text, the use of any text editor will do just fine to open it. By default, Windows will use Notepad to open a LOG file when you double-click on it. You almost certainly have an app already built-in or installed on your system for opening LOG files.

What is PID Ubuntu?

The process identifier (process ID or PID) is a number used by Linux or Unix operating system kernels. It is used to uniquely identify an active process.

How do you kill PID?

To kill a process use the kill command. Use the ps command if you need to find the PID of a process. Always try to kill a process with a simple kill command. This is the cleanest way to kill a process and has the same effect as cancelling a process.

How do you kill a PID in Unix?

kill command examples to kill a process on Linux

Step 1 – Find out the PID (process id) of the lighttpd. Use the ps or pidof command to find out PID for any program.
Step 2 – kill the process using a PID. The PID # 3486 is assigned to the lighttpd process.
Step 3 – How to verify that the process is gone/killed.

How do I find the process name using PID?

To get the command line for process id 9999, read the file /proc/9999/cmdline . On linux, you can look in /proc/ . Try typing man proc for more information. The contents of /proc/$PID/cmdline will give you the command line that process $PID was run with.