Example of a PL log in an Inclined Well
• Gamma Ray ‘Hot’ zones due to radioactive scale deposition in association with water production.
• Direct evidence of water production at the second perforation – the spinner shows flow across the whole interval but the capacitance tool (scales reversed) shows that only the top section is producing oil.
• The capacitance curve above the lowest perforation shows water disappearing to the high side of the well. This causes water fall-back and eddying which results in the spinner curves showing apparent down flow.
• As more oil comes in from the 3rd perforation oil bubbles coalesce to form slug flow. Water entry above reverts flow to bubble flow.
• There is frictional heating as flow passes through the lowest perforation, which is restricted by scale.
These logs were run using standard Sondex memory PL tools in a well in the Far East.
