Physico-chemical treatment of the productive reservoirs with the acid and alkali solutions is an important method of oil and gas recovery enhancement. Bottomhole area acid treatment is used in Western Siberia at the majority of oil and gas wells right after drilling or after such wells have been idle for a long time. After the acid treatment the wells are put into operation.

However, in order to make such physico-chemical treatment highly efficient it is necessary to take into account the material composition of the reservoir formation and perform all the technological operations at the well in full compliance with the technology developed for each specific oil or gas filed and each specific productive formation. Non-compliance with the abovementioned requirements can lead to low efficiency of such works, or to even negative results.

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