| Product Name: | Nitrogen Microsphere Technology |
| Product introduction: |
Nitrogen micro-sphere drive technology is a new type of tertiary oil recovery technology, according to the current field implementation. It has certain promotion value, its detailed principle of action needs further study, at the same time, the applicable reservoir conditions are still in the exploratory stage..At present, it implementation and effect on Changqing low permeability fault block. 1、The Mechanism Action of Nitrogen Similar to nitrogen mechanism in nitrogen foam drive. 2、Oil Displacement Mechanism of Microsphere The elastic microspheres are in discontinuous dispersion state in aqueous solution, which has the characteristics of nano-scale and micro - scale. Due to the elastic deformation ability of the elastic microspheres, the elastic microspheres are subjected to displacement force in porous media, and they are extruded and deformed at the throat to realize breakthrough forward movement. The system forms a high-strength viscoelastic system, which has the triple functions of " regulating, blocking and driving". 3、Cases of Technical Application Petrophysical properties and production status of CNPC (China National Petroleum Corporation) A reservoir The average formation gradient of the reservoir is 5 - 10m / km, the sedimentary system is dominated by delta underwater distributary channel, the oil-bearing area is 35.51km2, and the geological reserves are 3632.20× 104 T. The average effective thickness is 13.9 m, the average porosity is less than 10 %, the average permeability is less than 1 × 10 - 3μ m2, and the reservoir heterogeneity is strong; Formation pressure 19 MPa, reservoir temperature < 70 ℃, crude oil viscosity is 2.14 mPa•s, gas-oil ratio 78.2 m3 / t. It belongs to the " low porosity, low permeability, low pressure, low viscosity, high saturation pressure" reservoir. The main production layer in the test area is a typical block of low permeability and ultra-low permeability reservoirs.
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