METHOD OF DEVELOPMENT OF DEPOSITS OF HIGH VISCOSITY OIL WITH THE USE OF STEAM HORIZONTAL WELLS Russian patent published in 2018 - IPC E21B43/24 E21B7/04 E21B47/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry. Method for developing a high viscosity oil reservoir using paired horizontal wells includes constructing a horizontal injection well in the productive formation and a production well located lower and parallel to the injection well, descent into the injection well of two columns of tubing tubing of different diameters with the placement of the ends in different intervals of the horizontal barrel, descent into the production well of one or two tubing columns with displacement of the end or ends horizontally relative to the ends of the tubing of the injection well by at least 10 m, initial warming up of the productive formation by pumping the necessary for warming the inter-wellbore space of the deposit with the creation of a hydrodynamic coupling of the vapor volume, aging for thermocapillary impregnation and cooling of the wellbore, carrying out thermo-barometric measurements through geophysical studies in the production well. Based on the results of these studies, zones with extreme temperatures are identified in the horizontal wellbore of the production well. Among the identified zones, a zone is defined with a change in the angle of recruitment of curvature not more than 2 degrees by 10 m, placement of an electric centrifugal pump descending on the tubing string equipped with temperature and pressure sensors and a fiber optic cable along the entire length of the filter, further, the injection of steam through the injection well and the selection of products by the electric centrifugal pump in the production well. Initial heating of the productive formation is carried out by pumping the calculated volume of high-temperature steam into the production well, and exploration of the production well is carried out after thermocapillary impregnation and cooling of the wellbore below the maximum temperature for the pump. Pump is installed in a transition zone with a temperature between large and small heating, during operation of the pump, temperatures are monitored along the length of the production well and at the pump inlet. When the pump reaches the temperature close to the maximum temperature for the operation of the pump, it is moved to a nearby zone corresponding to the conditions for installing the pump, wherein the supply points of the steam in the injection well and the extraction point in the production well are located with a horizontal displacement of not less than 10 m in order to avoid steam breakthroughs.

EFFECT: acceleration of the commercial exploitation of the deposit, reduction of energy costs, efficient extraction of products.

1 cl, 1 ex