Public joint-stock company Ukrnafta has conducted three successful hydraulic fracturing operations on its wells, the company's press service has reported.

"The company has already successfully performed three such operations. As a result, the 820-Dolynske well has increased daily production rate to 11 tonnes of oil (previously, the well was not producing). The 830-Dolynske well is ramping up to optimal parameters. The 188-Pivnichno-Dolynske well is completing preparations before re-launching production. The company will perform fracking in two more wells in the Dolynske field before the end of the year," the company said.

Ukrnafta seeks to produce an additional 9,000 tonnes of oil in 2018 as a result of these five fracking operations.

The crews and equipment performing the fracking operations come from Ukrnafta's own oilfield services business.