FIELD: oil and gas industry.
SUBSTANCE: according to the method when the productivity of the well is reduced due to deposits of high-molecular compounds in the bottomhole zone, the regeneration of the bottomhole zone is carried out. It is performed by temporary transfer of the well from operational state to regenerative state. The bottomhole zone is first treated with supercritical fluid of carbon dioxide successively in dynamic and static modes. In dynamic mode of regeneration state, the injection periods of carbon dioxide supercritical fluid supplied to gas-bearing formation through the well are successively alternated with pressure change from the larger p1 to the smaller p2. In the static mode of regeneration state, the bottomhole is kept at the maximum pressure of supercritical fluid of carbon dioxide. Then the well is exposed to pressure equalization in the well and gas-bearing formation without further introduction of supercritical fluid of carbon dioxide under conditions of spontaneous movement of "high-molecular compounds-fluid" solution present in the gas-bearing formation, and returned to the production state.
EFFECT: increased well productivity due to intensification of dissolution and extraction of high-molecular compounds.
7 cl, 4 dwg
