Mud Logging

By datalog|abril 26, 2017|Resources, Services, Sin categoría|

Our professionals are extensively experienced in management and interpretation of both, geological and engineering information, as well as in the immediate attention to the possible technical or interpretative difficulties that may occur; this guarantees our contribution and support to both the geologist and the engineer.
The Mudlogging Unit designed and built as a result of more than 25 years of experience, providing the environment and adequate space for the development of the work itself.


Lithological interpretation Sampling, processing and Data storage
Calcimetry Total and individual volume of pits and program for monitoring
Hydrocarbons continuous record, daily reports and graphs. Blowout monitoring and control
Gas detection by Total chromatography Drill sensors for depth, RPM, WOB, Saw weight, pump pressure torque, pump rate, return percentage, mud weight and temperature, pit volume, H2S, CO2 detector, pressure control.
Gas chromatography
CO2 and H2S Detection


HC manifestations analysis and evaluation according to specifications
Clay solubility Alarm for all installed sensors
Shale density Monitoring during: Drilling, circulation, travel, coating run, cementation and well logs.
Caving Description and types
Metal fragments Sampling and weight


Drilling Data

Drilling date and day Total depth, Total vertical depth of the bit, Weight on the bit, Stop number, Weight on the hook, Instant torque, Rotary speed, (instantaneous and average), Pressure on the stand pipe, Pressure in the coating, penetration rat, pump blows, effective time of the bit, feet drilled by the bit,

 Mud Data

Mud Weight – in/out, Temperature, Mud flow – in/out, difference, Volume of mud in the pits, (Pit volume total  (active/ gain and losses), and trip tank control volume (theoretical vrs. Real volume displacement), Reserve pits, Depth and lag time.

Resistividad del lodo entrando y saliendo

Monitoreo de gas:

Gas total combustible
Gases hidrocarburos

Gas monitoring:

Total gas detectionTotal

Relación de gases

Gas ratiosCO2H2SAlarms monitoring system(High-speed chromatograph which makes the analysis of C1 to C5 in 30 seconds)


Formation Evaluation:


Description, rates and detailed lithological interpretation of ditch samples. Rates of cavings and morphology, when presented and immediately report to the engineer and the geologist.
Evaluation of hydrocarbons including fluoroscopy techniques, gas chromatographic analysis, and analysis under white and ultraviolet light, of cuttings and mud samples, made in intervals.
Shale density. The method used is the measurement of clay density by using an electronic scale, which will
Lithology offset with hydrocarbons evaluation and gases.
·not generate any injure of health, safety or environmental regulations.
·Calcimetry It may be required every 50 feet or at intervals that the mudlogger considers required.
·Daily reports that include a summary of activities, drilled lithology, drilling conditions and other parameters according to requirements.
Geological evaluation of data obtained and computerized by the mudlogging unit.

DATALOG COLOMBIA SAS., Provides general and constant assistance to the geologist and the engineer in the well.


During the tripping monitoring the Software allows constant monitoring of displacement volume and prediction about the volume trend change. Those parameters will be measured, logged and displayed on screen in real time:

Date and day of the trip
Difference of volumes
Bit depth and lag time of bit Surge calculation
Weight on bit Average trip time
Number of stands in hole
Total Strokes
Hookload, (minimum, maximum and average)
Instantaneous and average pipeline speed
Differential hookload (overpull / underpull).
Reaming data, (pump strokes, torque, in / flow in/out, pressure).
Active volume, system, total, partial
ROP, Torque, RPM, SPP
Trip tank volume| Through WellWizard: Formation Evaluation Log FEL displayed on work stations (mudloggers, Company Man, Wellsite Geologist, Drill floor monitor, remote access)

During the wellcontrol activities as kick and blowouts, the following parameters are measured, logged and displayed on screen in real time and continuously:

Date and operational day, mud resistivity in/out, stand pipe pressure Pump strokes to the bit
Casing pressure
Pump strokes to surface
Active pit volume total – PVT
Wellwizard display of casing pressure, standpipe pressure and active PVT
Mud Weight in/out Total Gas
Mud flow in/out Gas Chromatography C1 to C5
Total barriles desplazados CO2 and H2S

Total strokes pumped
Analysis and evaluation of gases
Real time logs Time vs depth: Continuous data acquisition every 10 to 30 seconds, printable in PDF format “incident log” every 24 hours.
During the activities of fishing, rimming, cementation job, directional drilling and wireline logs, the parameters suggested by the engineers or the geologist are measured, recorded and displayed on screen in real time and continuously using wellwizard.


Engineering Programs
• Overpressure Package: This program graphs several values of Exponent “d”, such as series of points versus depth on a semilogarithmic scale
• Compressibility package: Calculates the overburden and Poisson coefficients (comprehensibility of the formation).
• Hydraulic Package: The following mathematical models are available: Power Law, Modified Power Law, Bingham, Modified Bingham, Alternative, Hughes, Power Law API.
• Swab and Surge: To calculate the maximum speed allowed during a trip to avoid pistoning effects.
• Bit Performance Package (bit performance): Analyze the costs per foot of each bit. Take into account effective drilling time and also total time.
• L.O.T Package: Monitor and display the graphics relevant to the Leak off testing.
• BHA Package: Produces reports of string configuration.
• Gas Package: It allows to see in graph format the values of the corrected and uncorrected gases.
The aforementioned parameters have their respective graphing charts.

Pore ​​pressure calculation service:

The computerized data acquisition and storage system has the following methods:

Calculation of corrected exponent “D”, calculation of pore pressure, fracture pressure calculations, graph of mud out temperature, graph of gas trend including trip and connection gases; Gas ratios, Determination of shale density.

Drilling Data Analysis:

The computerized data acquisition and storage system has the ability to process and handle large amounts of data from drilling and other types.The software used is managed in both on-line and off-line mode, and allows the use of mathematical functions for the calculation of direct drilling parameters and some derivatives.

Caving Analysis:


The system has a group of automatic alarms that must be activated to control stability parameters .


Metal shaving wear analysis:

This analysis allows determining metal shaving wear. It is made through measuring the metal fragments collected in the pocket of the shakers through of a magnet (with a magnet of 4 “X 3” X 30 “or similar, in each pocket of the shakers). These measurements are normally taken every 12 hours or less than intervals of time if the directional parameters so require, these data are stored in a computer and reported daily.

Torque monitoring and drag

Within the Software packages supplied by DATALOG COLOMBIA SAS, there is one that allows the calculation of the Overpull / Underpull and continuously monitors the torque produced in the drill string.For the analysis of vibrations we have a program whose main function is to calculate the Corrected Penetration Rat, which is the one that really is in the drill at the bottom of the well. This differs from that recorded on the surface due to some factors such as Young’s modulus of elasticity, the coefficient of elasticity of the steel, the geometry of the string, etc.

Detection and evaluation of vibrations

Detection and evaluation of vibrations in the drill string, to avoid operational incidents by taking timely technical decisions regarding changes in drilling parameters that prevent damage to the drill pipe, the BHA and damage to the equipment. surface.Alarms for each one of the parameters involved in the vibrations that allow in this way the immediate detection of the problem.The vibration information is stored and for later printing.


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