Volume 8 – Mechanical and Electrical Services - Malaysia Geoportal

Chapter 3 GROUND WATER FACILITIES
Testing for specific gravity can be achieved by using mud balance which consist of the balance arm,
the lid for mud cup and the base which support the fulcrum
Fig. 3.2 Mud Mixing
Figure 3.3 Mud Balance
3.7 SAMPLING AND LOG RECORDING
The engineer, geologist or client relies heavily on the information provided by the driller. The drill log
reveals the full history of the full drilling operations and variations in the formation drill. The
information log by the driller therefore should be accurate and truly representative of the hole or site
conditions. The information fall into three broad categories:
- The strata penetrated.
- The actual occurrences. The driller may see, hear, feel, smell or even sense that something has
occurred or occurring.
- The driller interpretation. The driller’s log must record this information and conclusion. The event
of occurrences covered by the driller’s log fall in to three categories:
- Machine behaviour
- Borehole behaviour
- Formation fluid behaviour
Many tasks are simplified if we have check list to remind us of the point covered. Printed form for
driller’s log is a type of checklist.
3-4 March 2009