What is open hole logging?

Open-hole logging refers to logging operations that are performed on a well before the wellbore has been cased and cemented. In other words, the logging is done through the bare rock sides of the formation.

What is down hole logging?

Downhole logs are used to determine the physical, chemical, and structural properties of formations penetrated by drilling and to complement discrete core measurements. Where core recovery is incomplete, logging data may serve as a proxy for lab data for sedimentological and physical properties.

What are the different types of well logging?

What is a cased hole?

1. n. [Drilling] The portion of the wellbore that has had metal casing placed and cemented to protect the openhole from fluids, pressures, wellbore stability problems, or a combination of these. Antonyms: openhole.

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.

Introduction to Open Hole Logging, Dr. Moustafa Oraby

What are the three types of logging?

What is LWD and MWD?

Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while LWD refers to measurements concerning the geological formation made while ...

What do mud loggers do?

Mud loggers are field specialists who monitor the oil well and collect samples for the geologist. They oversee the collection, processing, handling, and analysis of samples collected from wells. They examine, describe, and record samples following industry standards and customer's requirements.

What is a wellbore?

The wellbore is the hole that's drilled into the earth to create the well. The casing consists of telescope-like layers of steel pipe placed inside the wellbore to reach what Zdarko calls the “pay zone.” That's where the oil or gas is. The steel casings shrink in diameter as they penetrate the earth.

What are 4 types of logging?

How many types of logs are there?

There are three types of log files: 1. Request log files that document the execution of a concurrent program running as the result of a concurrent request. Every concurrent request generates a log file.

What is porosity log?

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 does MD stand for in drilling?

In the oil industry measured depth (commonly referred to as MD, or just the depth), is the length of the borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or horizontal wells, especially those using extended reach drilling, the two can deviate greatly.

What is corrosion logging?

Multi Barrier Corrosion logging is designed to evaluate remaining metal thickness of the well completion elements such as a tubing and/or casing, up to 3 barriers, based on emission and receipt of electromagnetic field with following computation of data in software.

Do loggers make good money?

Typical Logging Worker Salary

They earned a median $21.46 per hour or $44,650 per year as of May 2019, according to the Bureau of Labor Statistics. The median salary is the midpoint, so half of fallers earned more than this amount. Fallers are among the highest-paid logger jobs.

What is mid logging?

Mud logging is the creation of a detailed record (well log) of a borehole by examining the cuttings of rock brought to the surface by the circulating drilling medium (most commonly drilling mud).

How much do mud loggers earn?

An Entry Level MUD Logger with less than three years of experience earns an average salary of ₹3.6 Lakhs per year. A mid-career MUD Logger with 4-9 years of experience earns an average salary of ₹4.1 Lakhs per year, while a Senior MUD Logger with 10-20 years of experience earns an average salary of ₹8.8 Lakhs per year.

What is the main advantage of open hole completion?

Open-hole completions have the following advantages: the entire pay zone is open to the well-bore; perforating is not required; well can be easily deepened; risk of formation damage from cementing is avoided; and costs are reduced.

What is well logging and its purpose?

A well log is a record of the formations and any events that are encountered in the well drilling process. It is also referred to as borehole logging. The main purpose of keeping a well log is to determine the suitability of the well for its intended use.

What is production logging tool?

Production logs are used to evaluate fluid production and movement both inside and outside of the casing downhole. The production logging tools are small in diameter and are run through tubing for evaluation of the well as it is producing.

What is a quad combo log?

The quad-combo, which includes resistivity, bulk density/neutron porosity, sonic, and gamma ray measurements, provided the operator with information to evaluate the reservoir's potential and lithology.

What is LWD measurement?

2.6.

Logging while drilling (LWD or Measurement while drilling (MWD), the terms are used interchangeably) is a general term to describe systems and techniques for gathering down-hole data while drilling without the requirement to remove drill pipe from the well.

What is oil drilling mud?

drilling mud, also called drilling fluid, in petroleum engineering, a heavy, viscous fluid mixture that is used in oil and gas drilling operations to carry rock cuttings to the surface and also to lubricate and cool the drill bit.