Gamma Ray- CCL

– Gamma Ray ‘Hot’ zones due to
radioactive scale deposition in association
with water production.
– Direct evidence of water production at the second perfs – 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 perfs shows water disappearing to the high side of the well. This causes water fall-back and eddying causing the spinner to have a negative offset.
– As more oil comes in from the 3rd perfs 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 perfs, which are restricted by scale.