With the continuous deepening of oilfield development, nitrogen has been widely used in oil and gas well exploitation, completion and workover, and even uses the inert nature of high-pressure nitrogen for gas collection and pipeline system purging to prevent the combustion of flammable gases and oilfields Corrosion of underground pipelines. So, how does the nitrogen generator improve oilfield recovery?

One is that, under certain conditions, the gravitational differentiation of the oil field allows nitrogen to enter the oil-wet cracks that cannot be entered by the injected water, displacing the remaining oil.

The second is to rely on the gravity separation of the oil field to discharge the residual oil trapped in the fractures and caves by gravity.

The third is to dissolve the injected nitrogen in the crude oil to expand the volume of the crude oil and reduce the residual oil saturation of the formation under the condition of ground separation by its oil drainage effect.

The fourth is to change the direction of fluid flow to displace residual oil in the fracture channel.

Fifth, relying on the gravity differentiation of oil and gas, the remaining oil that cannot be affected by the injected water at the upper part of the structure is recovered.