HIGHLY VISCOUS OIL FIELDS PRODUCTION METHOD Russian patent published in 2010 - IPC E21B43/24 

FIELD: oil-and-gas production.

SUBSTANCE: according to the method use vapors of horizontal production and injection wells. Those wells horizontal sections locate in parallel one over another in the production reservoir vertical plane. Wells equips with tubing string, which allows simultaneous heat transfer agent pumping in and product withdrawal, heat transfer agent pumping in, reservoir heating with a steam chamber creation, product withdrawal through production well and the reservoir and the well process parametres control. According to the invention locate tubing string endings on the opposite ends of the well relative horizontal section. Start reservoir heating with pumping steam inside of the both wells, heat reservoirs between well area, decrease highly viscous oil viscosity. Create the steam chamber by pumping in the heat transfer agent, which distributes in the reservoir top part. Increase the steam chamber dimensions, during product withdrawal process, periodically, 2-3 times a week, define withdrawal water salinity as well. Analyse withdrawal water salinity change influence on steam chamber heating evenness. Taking into account the withdrawal water salinity change execute the steam chamber even heating by regulating heat transfer agent pumping in regime or the well product withdrawal till the withdrawal water salinity value gets stable.

EFFECT: field production efficiency increase because of reservoir heat treatment coverage increase, more precise control of steam chamber heating evenness by heat transfer agent pumping in and product withdrawal regimes regulation.

3 ex, 5 dwg