Source : https://en.wikipedia.org/wiki/Natural_gas_in_Ukraine
Russia ...wants those Gas resources and they do not want the West to fund the development of those resources, because that will threaten their market share in Europe. The current conflict is not about Political influence.... but rather about "Money"
Europe should have reduced their dependency on Russian Oil and Gas, but it was convenient for them and it was a cheaper source for Oil and Gas.... but this conflict has hastened their efforts to do it now. (It was the kick in the butt that they needed)
Hydraulic fracturing was used in the USSR and is used in Russia, but the only limitation has been and remains technological backwardness, because in this area there is complete dependence on Western technologies.
"In the Soviet Union, the first hydraulic fracturing began in 1952. The peak of the use of hydraulic fracturing in the USSR fell on 1958–1962, when the number of operations exceeded 1500 per year (and in 1959 three thousand operations were performed). With the discovery of large high-rate fields in Western Siberia, the use of hydraulic fracturing was practically abandoned - "light" oil made it possible to do without additional stimulation methods. And in the meantime, technology has developed in the world.
During the period of lack of demand, domestic equipment and experience in the use of hydraulic fracturing lagged far behind. Back in 1980, at a meeting of the scientific and technical council of the USSR Ministry of Gas Industry, the head of the laboratory of SevKavNIPIgaz D.F. Matveev noted: “Hydraulic fracturing is widely used abroad and, unfortunately, on a much smaller scale in the domestic gas industry. This is due to a number of reasons, the main of which are: lack of developed technology; very limited choice of working fluids; the absence in the initial period of industrial testing of pumping units with high productivity and high pressure, which did not make it possible to carry out work with significant efficiency; in connection with the exploitation of high-yield deposits, the issue of increasing the efficiency of developing low-yield and low-permeability reservoirs was not so acute.
In recent history, hydraulic fracturing in Russian fields has become the prerogative of foreign service companies. Domestic specialists are working in this direction, but so far, new technological trends are still coming from abroad."