METHOD FOR DEVELOPMENT OF OIL AND GAS DEPOSITS Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this relates to problems of protecting underground fresh water from salinization in operation of oil and gas wells. According to method, displacing liquid is injected through injection wells and bed product is recovered through producing wells. Created in zones of location of injection wells is network of observation wells. Observation wells are drilled until opening of first water-bearing bed with mineralized water. This water-bearing bed is disposed below surface casing of injection wells which expect their liquidation. This also includes creation of bridge below water-bearing bed with mineralized water. Hollows of observation wells are connected by secondary opening with aforesaid bed for measuring static level in observation wells. Determined is cause of breakthrough of liquid and carried out are repair and isolation operations in injection wells. After that, observation wells are left for relieving pressure which is created at leakage of injected liquid through depressurized parts of production strings of injection wells. Outflowing liquid is collected at grouped pumping stations. Application of aforesaid method prevents salinization of underground drinking water. EFFECT: higher efficiency. 3 dwg