FIELD: oil and gas industry.
SUBSTANCE: invention relates to construction of oil and gas wells, in particular, to environmentally safe disposal of drilling wastewater during onshore drilling operations. The method includes experimental investigation which is used as a basis for permissible rate setting for disposal of drilling wastewater and permitted concentration of salts for soils in the respective area. Pretreated drilling wastewater is disposed periodically in several cycles in the process of the well deepening and after completion of drilling. Before disposal of drilling wastewater it is treated by means of plants irrigation at the premises neighbouring to the drilling site with acidification up to pH value of 6.0-8.5 and then diluted with fresh water up to irrigable permitted concentration of salts (1 g/dm3).
EFFECT: improving environmental safety, reducing time period for liquidation of accumulator with drilling wastewater.
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