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.

What are the methods of formation evaluation?

Formation evaluation techniques:

Mud logging.
Wireline logging.
Coring.
Drill stem testing.
Measurement-while-drilling and logging-while-drilling.

What is well logging techniques?

• Well Logging is the technique of making. petrophysical measurements in the sub-surface earth formations through the drilled borehole in order to determine both the physical and chemical properties of rocks and the fluids they contain.

What is RMF in well logging?

the drilling mud invades the formation as mud filtrate (Rmf). 4. The invasion of the porous and permeable formation by mud filtrate creates invasion zones (Rxo and Ri) and an uninvaded zone (Rt). Reading resistivity logging tools provide information aboul the invaded and uninvaded zones. 5.

Why formation evaluation is important?

In petroleum exploration and development, formation evaluation is used to determine the ability of a borehole to produce petroleum. Modern rotary drilling usually uses a heavy mud as a lubricant and as a means of producing a confining pressure against the formation face in the borehole, preventing blowouts.

What is formation in a well?

A general term for the rock around the borehole. In the context of formation evaluation, the term refers to the volume of rock seen by a measurement made in the borehole, as in a log or a well test. These measurements indicate the physical properties of this volume.

What is formation evaluation by wireline logging?

– Formation Evaluation (FE) is the process of interpreting a combination of measurements taken inside a wellbore to detect and quantify oil and gas reserves in the rock adjacent to the well. FE data can be gathered with wireline logging instruments or logging-while-drilling tools.

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 do resistivity logs measure?

Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current.

What is software development logging?

In computing, a log file is a file that records either events that occur in an operating system or other software runs, or messages between different users of a communication software. Logging is the act of keeping a log. This relieves software developers of having to design and code their own ad hoc logging systems.