Mud Logging Services

The primary function of this service is to detect and position with respect to depth all Hydrocarbon accumulations while drilling a well. This is accomplished by continuous monitoring and analysis of hydrocarbons in the drilling fluid. A Total Gas Detector (an instrument that measures the Total Hydrocarbon content) is used along with or in combination with a High Speed Chromatograph (an instrument that identifies and provides relative concentrations of each hydrocarbon component) (c1- c8 plus co2 and nitrogen)). The data obtained from these instruments allows for rapid formation evaluation of all prospective zones with respect to Hydrocarbon accumulations. The detailed data is then submitted on a computer generated comprehensive Hydrocarbon log along with a complete interpretive well review done by a senior Continental representative.


Some of the applications of these services would be to determine Gas / Oil / Water contact zones on vertical and horizontal wells. Can be used on Exploration / Wildcat wells where no offset data is available. These services can be used for rapid formation evaluation when time is crucial for making logging or casing decisions. These services are readily used for meeting Government Board safety requirements when drilling in highly sensitive areas. Extremely beneficial when drilling in Over-Pressured Fault Zones (Foothills Wells) and in areas with High Hydrogen Sulfide (H2S) zones where Safety is of the utmost importance. These services would also be beneficial in helping a wellsite geologist keep up with sample processing on high speed wells.


  • Continuous Twenty Four Hour Hydrocarbon Monitoring (Two Analysts Provided)
  • Total Hydrocarbon Detection.
  • Chromatographic Gas Analysis (C1 - C8) + He + N2 + N2O + C2H4 + C3H6 + CO2 + Benzene+Toluene.
  • Transmission Of Data From Wellsite To Our Secure Data Hub.
  • All Hydrocarbon Data Provided In LAS or ASCII Format.
  • Computer Generated Comprehensive Hydrocarbon Log.
  • Complete Interpretive Log Review by Continental Representative.


  • Approximately Twelve Hours of Continuous Hydrocarbon Monitoring ( One Analyst Provided)          Responsible for Twenty Four Hours of Data Coverage).
  • Total Hydrocarbon Detection.
  • Chromatographic Gas Analysis (C1 - C8) + (CO2).
  • Transmission of Data from Wellsite to our Secure Data Hub.
  • All Hydrocarbon Data provided in LAS or ASCII format.
  • Computer Generated Comprehensive Hydrocarbon Log.
  • Complete Interpretive Log Review by Continental Representative.


  • Approximately Twelve Hours of Hydrocarbon Monitoring ( One Analyst Provided) (Responsible for Twenty Four Hours of Data Coverage).
  • Total Hydrocarbon Detection.
  • Computer Generated Hydrocarbon Log.
  • Transmission of Data from Wellsite to our Secure Data Hub.
  • All Hydrocarbon Data provided in LAS or ASCII format.
  • Complete Interpretive Log Review by Continental Representative.


This service is typically provided for special projects (down-spacing wells, coal-bed methane projects) or wells as a cost saving alternative to having a wellsite geologist on site when no sample descriptions are required. The client will still receive hydrocarbon data and samples can still be processed and collected by the analyst for client review at a later date and for Government board requirements. This service would be beneficial for clients that have wells in areas with good offset data and good well control.


Results of the total gas data, chromatographic analysis and the sample examination are presented on our computer generated comprehensive hydrocarbon well log. This log is plotted on a 1:240 API wireline equivalent scale to promote rapid correlation between the hydrocarbon well log and the wireline logs.

Distinctive features include:

* Total Gas, Chromatography and Oil Indicator curves.
* Penetration Rate Curve (which can be plotted on a linear or semi-logarithmic scale).
* Engineering and Drilling Fluid parameters.
* Lithology in per cent as well as the Interpretive Lithology.
* Porosity and Visual Show indicators.
* Total Show Evaluator (provides swift location and indicates the quality of the most significant shows based on the analyst's evaluation of the hydrocarbon data).


In addition to the hydrocarbon log, an in-depth analysis is provided of all instrument charts derived from the hydrocarbon detection equipment. This analysis will be performed by supervisory personnel, normally in consultation with the unit manager, at selected intervals and at the conclusion of the well. These intervals are usually intermediate log and casing runs or zones of particular geological interest. Detailed annotations arising from this analysis are carefully plotted on a print of the log and, together with the actual instrument chart data, comprise the basis for an in-depth conference with the well operator. This conference will result in the fullest understanding and utilization of the hydrocarbon logging data as it applies to the well evaluation program. This interpretive service is provided at no additional cost.


As a supplement to the hydrocarbon well log Continental Laboratories utilizes a chromatographic ratio plot to help determine the character of the reservoir fluids. A plot of the wetness, balance and character ratios reveals trends, which allow the type of reservoir fluids to be recognized. Significant shifts in these trends can help locate contact points between different reservoir fluids. Contact points between gas, oil, solvent and water have been located through the use of these ratio plots. Check our technical paper section, for related papers.


The Canadian Well Logging Society has developed the Log ASCII Standard (LAS) in order to standardize the organization of digital log curve information for floppy disks. Information from Continental Laboratories Hydrocarbon Well Log can be digitized in the LAS format and stored on a floppy disk. This allows digitized data from the hydrocarbon log to be merged with other digitized log data. The Alberta Energy Utility Board intends to require the submission of log digits. The current procedure of submitting paper logs is to continue but plans are to slowly phase this out and replace it with a digital database.


For nearly Fifty years Continental Laboratories Ltd. has been providing a complete line of rental portable Hydrocarbon Detector's (Gas Detectors) to the wellsite geologist(s) in the Oil and Gas industry. The line of portable detectors includes the MP2300 , the MP2500 remote Single filament and the new MP2500 remote Dual Filament. All portable gas detectors provided by Continental Labs Ltd. are CSA approved to meet all safety standards and are calibrated for linear response with known concentrations of gases to ensure accurate and reliable hydrocarbon data.


The Mud Duck is the only instrument providing continuous, in the drilling fluid, measurement of total soluble sulfides, pH and H2S hazard potential. "At the source" measurement of these three parameters provides both an early warning system for the onset of H2S and means for managing sulfides in solution. This instrument is often combined as a supplementary addition to our limited & complete logging service as a safety measure when drilling a sour gas well.


Over the years, Continental Laboratories has accumulated over 3000 hydrocarbon well logs in our library. The library contains well logs throughout the Western Canadian Sedimentary Basin, Eastern Canada(onshore/offshore) , the Northwest Territories, the arctic, and the United States. A list of logs from specific locations/areas can be obtained by contacting Continental Laboratories Ltd. Please check the log library link for available wells and locations. Copies of logs can be provided for a cost to your invoice .


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