Physico-chemical initiation of thermal stimulation with high-viscosity oil production

Abstract

The increasing number of fields with hard-recoverable reserves of high-viscosity oil require new and innovative approaches and methods for the development of such deposits. When choosing a method of exposure and development technologies the level of input heat energy use is important. Perfection of technologies of thermal methods and increase of their efficiency must be based on creation of the thermal edging due to physical and chemical initiation with subsequent their moving on a layer by other ousting agents with low heat conductivity and preset parameter of viscidity. The size of edging depends on geologo-physical descriptions of layer, rates of generation in it of warmth and distance between forcings and extractive mining holes. The new method was developed based on controlled catalytic heat stimulation using hydrogen peroxide, which in interaction with produced water releases the required amount of heat, which leads to reservoir thawing, reducing the thickness of the adsorption layer of surface active molecules of oil on the surface of the pore channels, thus increasing the permeability of the reservoir for oil, and oil viscosity is reduced, and, as a consequence, oil increases the mobility factor, which significantly increases the rate of participation. The developed technology is an alternative to current thermal methods applied in practice, and, in fact, has no restrictions as to reservoir depth and thickness, the content of linked or buried water. It does not require the use of injection wells of special design, special heat-insulating materials and energy intensive equipment.