Research on Deoxygenated Air Chemical Viscosity Reduction and Energy Enhancement Methods for Horizontal Wells in Tight Reservoir

Abstract Tight reservoir is an important replacement resource for oil field development. In recent years, elastic exploitation through volumetric fracturing of horizontal wells has obtained preferable effects, nevertheless, in the later period of elastic exploitation, the energy replenishment was lacking and the production of some horizontal wells declined rapidly, at the same time, due to the high content of wax and gum in tight reservoir, the fluidity of crude oil is poor and blockage is easy to be formed, seriously affect the development effect and benefit, so we urgently need to explore the effective can increase viscosity technology, improve the dense reservoir development effect. For this purpose, formulate implementation principles and well selection principles, optimize the technical plan, and determine the injection volume, finally, five horizontal Wells were selected for deoxygenated air chemical viscosity reduction and energy enhancement test, significant oil increase effect has been achieved. This paper has an overall understanding of the chemical viscosity reduction and energy increase method of deoxygenated air in elastic production of horizontal well in tight oil formation, and has a certain reference for improving oil recovery in the later stage of production [3] .