Basic Mud Logging (BML)

Mud logging, also known as surface logging, is the creation of a detailed record of a borehole by examining the bits of rock or sediment brought to the surface by the circulating drilling medium (most commonly mud). Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers with information about the lithology and fluid content of the borehole while drilling. Historically it is the earliest type of well log.

How to:

  • Make well to well correlation
  • Understand well drilling
  • Understand mud logging equipment
  • Calculate the lag time and advanced volumes calculations
  • Describe the formation cuttings
  • Integrate the cuttings evaluation with the drilling parameters
  • Interpret all the acquired geological and engineering data at the rig site
  • Evaluate the hydrocarbon potential of the formation
  • Deal with drilling mud rheology and hydraulics
  • Handle, process and describe cores
  • Evaluate different types of pressure
  • Handle formation pressure to minimize borehole risks
Discipline: Geology
Level: Fundamental
Duration: 3 Days

1- General Operations:

  • a) Introduction in Oil Field Industries.
  • b) Rig (Types, Components, and Persons).
  • c) Rig Operations (Drilling, Tripping, Casing, Cementing, Testing, Completion, and Problems).
  • d) Mud types, purposes, and mud cycle.


2- Mud Logging:

  • a) Definition, Functions, History.
  • b) Logging Unit Equipment and Sensors Types.
  • c) Logging Unit Crew, duties, and responsibilities.
  • d) Mud Log Forms and contents.

3- Mud Logging Calculations & Math:

  • a) Volume, Lag, and Stroke Calculations.
  • b) Depth Calculations.

4- Sampling:

  • a) Type of samples.
  • b) Sample Collections and preparations.
  • c) Sample descriptions and examination tests.
  • d) Hydrocarbon shows indications and description.

Participants are encouraged to bring data examples related to this course.

New hire geologists and geophysicists; and reservoir, petroleum, and drilling engineers