METHOD OF PRODUCTION OF OILS, GAS CONDENSATES AND GASES FROM DEPOSITS AND PROVISION OF CONTINUOUS OPERATION OF PRODUCTION AND INJECTION WELLS Russian patent published in 2014 - IPC E21B43/22 E21B37/06 

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with this process, working fluid is injected in wells for processing of well bottom zones and displacement of oils from beds. Wells are repaired while pipes and equipment are subjected to antirust treatment. Pipes at production well top sections are cleaned of pyrobitumen and coal-tar-paraffin sediments. Working is composed of complex organic solvent consisting of derived aromatic hydrocarbons, ethers of carbonic and organic acids with density and viscosity to be varied subject to varying conditions of particular deposits. Beds are processed by said solvent many times in preset time intervals to keep up the required level of oil and gas production. For cleaning, said solvent is pumped many timed with antirust additives of phosphates via pipes from well bottom to surface and back in closed cycle. For gas production at deposits with highly-flooded beds and low bed pressure, organic solvent density is changed to displacement of formation fluids inside formations. To up oil production with processing by complex organic solvent, the latter used to plug all injection wells to displace oil towards production wells. Note here that volumes on organic solvent injection in injection wells alternate with volumes of formation fluids at the ratio of 1:1 at the beginning of injection to at least 1:20 as total volume of injection increases.

EFFECT: higher yield, continuous operation of wells with outages in repair.

2 dwg