Table of Contents
- 1 What is well logging in petroleum?
- 2 What are the different types of well logging?
- 3 What is the purpose of well logging?
- 4 What is production logging tool?
- 5 What is in a well log?
- 6 What is the production log?
- 7 What’s the difference between logging and deforestation?
- 8 How are well logs used in oil exploration?
- 9 How does logging work on an oil rig?
- 10 What was the solution to the well logging problem?
What is well logging in petroleum?
Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole. Some types of geophysical well logs can be done during any phase of a well’s history: drilling, completing, producing, or abandoning.
What are the different types of well logging?
Types of Well Logging
- Acoustic logging. Acoustic logging includes those techniques that use a transducer to transmit an acoustic wave through the fluid in the well and surrounding elastic materials.
- Electrical Methods. Spontaneous Potential Log.
- Flow Logging.
- Hole-to-Hole Logging.
- Hydrophysical Logging.
- Nuclear Logging.
Which types of well logs are used for petroleum exploration?
Types of logs
- Gamma ray logs.
- Spectral gamma ray logs.
- Density logging.
- Neutron porosity logs.
- Pulsed neutron lifetime logs.
- Carbon oxygen logs.
- Geochemical logs.
What is the purpose of well logging?
Engineers and drillers use well logs to measure depths of formation tops, thickness of formations, porosity, water saturation, temperature, types of formations encountered, presence of oil and/or gas, estimated permeability, reservoir pressures and formation dip — ultimately determining whether a well is commercially …
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 the meaning of well logs?
A Well Log is a detailed record of the geological formation during the drilling of a borehole. A well log is prepared by either taking samples through visual inspections or with the aid of measuring instruments lowered into the borehole.
What is in a well log?
Well logs are acknowledged as legal documents which record the history of a well through the drilling stages and up to its completion. The well logs record physical properties of the borehole which must then be petrophysically interpreted to obtain the associated rock and fluid properties of the well.
What is the production log?
A record of one or more in-situ measurements that describe the nature and behavior of fluids in or around the borehole during production or injection.
How does production logging tool work?
Production logging tools are run down the wellbore and record the behavior and nature of fluids inside the well during production or injection. Once the logs are prepared, dynamic analysis of well performance is done at different production zones.
What’s the difference between logging and deforestation?
If we examine the strictest definitions of the terms, we will find that logging is described as the commercial felling of trees to make other products. Deforestation, on the other hand, is defined as the complete removal of the forest and all of its associated life forms.
How are well logs used in oil exploration?
Well logs are the primary means of determining formation depth and what type is it, and many other critical information. A log is a record of information about the geological formations that have been drilled through, it is also referred to as borehole logging. What well logs show? Well logs show everything about a borehole.
How is wireline logging used in the oil and gas industry?
Wireline log consisting of a complete set of logs. The oil and gas industry uses wireline logging to obtain a continuous record of a formation’s rock properties. Wireline logging can be defined as being “The acquisition and analysis of geophysical data performed as a function of well bore depth, together with the provision of related services.”.
How does logging work on an oil rig?
Offshore, the same equipment is installed in a small cabin left permanently on the rig. To run wireline logs, the hole is cleaned and stabilized and the drilling equipment extracted, then the logging tools attached to the logging cable and lowered into the hole to its maximum drilled depth.
What was the solution to the well logging problem?
Normal electric logs require a conductive or water-based mud, but OBMs are nonconductive. The solution to this problem was the induction log, developed in the late 1940s. The introduction of the transistor and integrated circuits in the 1960s made electric logs vastly more reliable.