Water which is produced from the water reservoir and hence not adding to the hydrocarbons sweep.
It is a opposite to Good Water which is produced from the same reservoir as hydrocarbons and hence helping to sweep hydrocarbons.
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Fig. 1.1. Perforated reservoir A2 producing bad water as this water is not coming along with hydrocarbons. Compare with good water production from A1, where water is coming along with hydrocarbons. | Fig. 1.2. Non-perforated reservoir A2 producing bad water as this water is not coming along with hydrocarbons. Compare with good water production in A1 which is linked to A2 through behind-casing channel. |
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis / Watercut Diagnostics
[ Good Water ]