Application and prospect of nanotechnology for efficient development of tight reservoirs
With the continuous exploration and large-scale development of conventional oil and gas resources,unconventional oil and gas resources such as tight oil and gas have become a hot spot in the exploration and development of global oil and gas resources.In view of the characteristics of poor physical properties,such as small pore throat size,no natural capacity and low oil recovery of tight reservoirs,nano-materials with nano-size,low interfacial tension and good wedge-shaped permeability,have been widely used for efficient development of tight reservoirs.Nano-permeation displacement technology was gradually developed as a key technology to achieve high-efficient development of tight reservoirs.It can be considered that the integrated technology of permeability and energy enhancement,oil washing and oil flooding is promoted in tight reservoirs.The use of nano-permeation displacement technology in cooperation with large-scale hydraulic fracturing can increase fracturing scale and fracture density and length.At the same time,it realized the effective energy and injection increase of tight reservoirs,improving the distance of permeation distance and the oil washing effect.Therefore,the integrated technology of high-efficiency seam network modification and permeation to enhance oil recovery will be a new way to improve the recovery efficiency and comprehensive benefits of tight reservoirs development.
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