METHOD FOR ELIMINATION OF UNDERGROUND RESERVOIRS OF FORMATION HYDROCARBON RAW MATERIAL WITH RESERVOIRS CONSTRUCTED IN ROCK SALT AND OTHER ROCKS, INCLUDING PERMAFROST, AS WELL AS IN NATURAL FORMING KARSTIC CAVITIES Russian patent published in 2021 - IPC E21F17/16 

FIELD: environmental protection; oil and gas production industry.

SUBSTANCE: method involves preparation of a recycling product by mixing drilling mud, sand, cement and sorbent at the following ratio of components, wt %: drilling mud 50, cement 2–5, sorbent 2–5, sand—the rest. Prior to pumping, the recycling product is transferred into a movable state with introduction of liquid into it to moisture content of 20–60 %, wherein the working temperature of the obtained recycling product must be not less than 30 °C, and ambient temperature during pumping of recycling product is not lower than 5 °C. Obtained recycling product is pumped into the liquidated underground storage through the first production well bore, after which fluid is displaced from underground storage to second production well, wherein displaced liquid is used during subsequent transfer of recycling product into mobile state, process of underground storage filling is performed before displacement of injected recycling product is started from the second production well. At that, control of underground storage filling quality is carried out, for this purpose on day surface at least two control wells are drilled, after that, pumping process is resumed until complete pumping of pumped recovery product from all drilled wells. Finally, each said well is sealed by grouting of the shafts and bottomhole zones.

EFFECT: similar solution prevents negative impact on environment.

8 cl, 1 dwg, 2 tbl