Thursday, September 11, 2008

LWD/MWD, Baker Hughes INTEQ

I used to work with Baker Hughes INTEQ (BHI) as a LWD/MWD or Logging Geologist (Mudlogger). Baker Hughes is a global oilfield service company with operations in over 90 countries. BHI used to known as Exploration Logging, founded in 1952 to provide formation evaluation services in the oil and gas provinces of California. Then in July 1979, Exploration Logging merged with Smith Corp. under the name Exlog/Smith. Being a Mudlogger is not an easy task. They have to recording all the geological data that obtained while drilling, interpreting the findings and informing the client in a timely manner of significant changes in the well. At the time of drilling a well, the most important thing to those are directly concerned with the drilling operation is to drill a hole as quickly and safe as possible at the specified location/direction and to the specified depth. Mudlogger must inspect the drilling mud and cuttings for traces of oil and gas. It is important to detect any of hazardous drilling conditions such as blowout.The log is recorded simultaneously with the drilling of the hole. Detailed data on the physical characteristic of the subsurface strata is collected and analyzed. Mudlogger provided the following information:
  • Direct measurement of HC gases from the drilling mud.
  • Chromatographic analysis of the drilling mud for individual HC gas content.
  • Total combustible gas from drill cuttings.
  • Datailed rate of penetration curve.
  • Lithology log and description.
  • Drilling mud characteristic.
  • Data pertinent to the well's operation.
  • Collect bit data, deviation and other pertinent engineering information
As a drilling well monitor, they have to familiar with the lag determinations (time interval required for pumping the samples from a particular depth to the surface), monitor the pump stroke counters, record the depth and drill rate, determine the mud gas from the drilling mud, gas trap, the gas detector, trip and connection gases, mud press, pit level indicators, collecting and examining the cuttings and provide mud logging log. Mud logging is not complex in principle and does not interfere with the drilling process, and the results are available almost immediately.

Now it was 6 years since I leave this profession, but all the memories in oil and gas fields still remain in my mind and I really missed it!

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