Changes

==Equipment==

==Equipment==

===Standard equipment===

===Standard equipment===

* ''Chart recording''—A continuous analog chart recording is made of all logged data.

* ''Chart recording''—A continuous analog chart recording is made of all logged data.

* ''Mud test kit''—This kit contains equipment to perform routine [[drilling fluid]] analyses and titrations.

* ''Mud test kit''—This kit contains equipment to perform routine [[drilling fluid]] analyses and titrations.

* ''Sample processing equipmen''—This equipment is used for catching, sieving, preparing, and testing lithology, mineralogy, and oil content in cuttings (Figures 3 and 4).

* ''Sample processing equipment''—This equipment is used for catching, sieving, preparing, and testing lithology, mineralogy, and oil content in cuttings (Figures 3 and 4).

* ''Optical equipment''—A stereomicroscope is equipped for use with natural and ultraviolet light.

* ''Optical equipment''—A stereomicroscope is equipped for use with natural and ultraviolet light.

* ''hog production equipment''—A typewriter, plotter, and copy system are needed for log reproduction.

* ''hog production equipment''—A typewriter, plotter, and copy system are needed for log reproduction.

Additional equipment may be needed to perform special on-site analyses.

Additional equipment may be needed to perform special on-site analyses.

The equipment used in mudlogging is housed in a portable “unit” or small trailer (Figure 5). Most mudlogging units have similar physical layouts. Electronic instruments are typically housed at one end of the unit, while a sample handling area is along one wall and a work area along another wall (Figure 3). Sleeping and eating facilities may also be housed at the far end of the unit.

The equipment used in mudlogging is housed in a portable “unit” or small trailer (Figure 5). Most mudlogging units have similar physical layouts. Electronic instruments are typically housed at one end of the unit, while a sample handling area is along one wall and a work area along another wall (Figure 3). Sleeping and eating facilities may also be housed at the far end of the unit.

For extremely hazardous locations, mudlogging units are constructed of steel plate, pressurized to prevent gas entry, and equipped with insulating fireproof and explosion-proof components.

For extremely hazardous locations, mudlogging units are constructed of steel plate, pressurized to prevent gas entry, and equipped with insulating fireproof and explosion-proof components.

Standard mudlogging services include the following:

Standard mudlogging services include the following:

* Monitoring rate of penetration (including factors that can affect ROP response, such as changes in weight on bit, revolutions per minute, and pump pressure) (see chapter on “Rate of Penetration”)

* Monitoring rate of penetration (including factors that can affect ROP response, such as changes in weight on bit, revolutions per minute, and pump pressure) (see [[Rate of penetration]])

* Monitoring of drilling activity

* Monitoring of drilling activity

* Monitoring of gas (see chapter on “Mudlogging: Gas Extraction and Monitoring”)

* Monitoring of gas (see [[Mudlogging: gas extraction and monitoring]])

* Drill cuttings analysis (including lithology breakdown and observed versus interpreted lithology) (see chapter on [[Mudlogging: Drill cuttings analysis]])

* Drill cuttings analysis (including lithology breakdown and observed versus interpreted lithology) (see [[Mudlogging: drill cuttings analysis]])

* [[Show evaluation]] (factoring in data such as ROP, lifhology, cut type, and intensity) (see chapter on [[Show evaluation]])

* [[Show evaluation]] (factoring in data such as ROP, lithology, cut type, and intensity)

* Safety considerations, such as checking for flow and sudden gas increases

* Safety considerations, such as checking for flow and sudden gas increases

During periods of rapid drilling or when multiple special analyses are run, an additional logger or sample catcher is often added to each tour.

During periods of rapid drilling or when multiple special analyses are run, an additional logger or sample catcher is often added to each tour.

In some mature exploitation areas, companies will hire one mudlogging contractor to monitor several wells at a time. In such cases, rig crews are required to catch cuttings samples for later analysis by the logger. These samples are often caught as time allows and are not as useful as cuttings that have been systematically caught and lagged (see chapter on [[Wellsite math]]).

In some mature exploitation areas, companies will hire one mudlogging contractor to monitor several wells at a time. In such cases, rig crews are required to catch cuttings samples for later analysis by the logger. These samples are often caught as time allows and are not as useful as cuttings that have been systematically caught and lagged (see [[Wellsite math]]).

==See also==

==See also==

* [[Wellsite math]]

* [[Wellsite math]]

* [[Core handling]]

* [[Core handling]]

* [[Core alteration and preservation]]

* [[Core alteration and preservation]]

* [[Wellsite safety]]

* [[Wellsite safety]]

[[Category:Wellsite methods]]

[[Category:Wellsite methods]]