What is nitrogen?
Nitrogen is an element that exists abundantly in nature, accounting for 78% of air by volume and 75% by weight. It is an odorless, colorless, tasteless gas and is inert.
The industrial uses of nitrogen are diverse. However, our focus in this article will be on the oil and gas industry.
What is nitrogen used for?
Nitrogen is highly compressible, inert and miscible with water, making it suitable for a wide range of industrial applications. For example, pharmaceutical companies use high-purity nitrogen to synthesize and preserve compounds used in the production of drugs.
Food processing companies use nitrogen for packaging of perishable foods to increase shelf life. Metal manufacturers use nitrogen to prevent oxidation during the formation of new metal. Industries involved in the production of polymers use nitrogen to harden materials such as plastics and rubber. These are just a few of the industrial uses of nitrogen.
Nitrogen is incredibly useful in the upstream oil and gas industry for stimulating production from brownfield or low-permeability reservoirs. Because of its relatively inert nature, it does not cause underground combustion like carbon dioxide and methane gases.
Nitrogen Applications in the Oil and Gas Industry
Industrial uses of nitrogen span onshore and offshore applications, including.
- Nitrogen injection
- Pipe drying
- Nitrogen purge
- pressure test
- nitrogen blanket
- Nitrogen injection in oil and gas wells
Normally, after an oil and gas well continues to produce for a period of time, its formation pressure will decrease. During the primary recovery stage, this pressure is used along with pumping operations to move hydrocarbons toward the surface. At this stage, only 10-15% of the initial oil in IP (OIIP) is produced.
Over time, secondary oil recovery techniques such as gas lift (in the gas cap) and water injection (in the production area) will be used to stimulate production by sweeping more oil and gas towards the production lines, recovering another 20-40% .
When secondary oil recovery methods are insufficient to maintain production, enhanced oil recovery (EOR) methods can be used. When nitrogen is injected into reservoirs with insufficient pressure or low permeability, it can maintain or increase existing production. Carbon dioxide and methane can also be used, but nitrogen is more cost-effective because it can be produced on demand and does not require extensive pipeline injection. EOR using nitrogen injection can help operators recover up to 60% of OIIP.
To perform nitrogen injection, pressurized nitrogen gas is injected into the reservoir, stimulating the flow of hydrocarbons from hard-to-reach areas. Operate using nitrogen at a specified minimum mixing pressure. At very high pressures (up to 15,000 psi), nitrogen forms a miscible slug with powerful vaporization driving force, resulting in improved oil and gas recovery.
On-site nitrogen generation has several advantages over using cylinders, including:
Security and reliability. The on-site nitrogen generator is a modular, containerized system that does not require frequent maintenance. Unlike gas bottles, they are less prone to leaks and damage.
Unlimited supply. Unlike cylinders, which have a limited capacity, on-site nitrogen generation systems can produce a steady supply of product.
cut costs. Nitrogen generators (PSA nitrogen machines, nitrogen equipment) save operators from the excessive logistics costs involved in transporting bulky cylinders to and from the site.
In order to generate a stable supply of nitrogen from the atmosphere, a nitrogen generator (PSA nitrogen machine, nitrogen equipment) is required. Suzhou Hit Gas Company provides manufacturing services of nitrogen generators (PSA nitrogen machines, nitrogen equipment) for oilfield operations.
What is a nitrogen generator?
A nitrogen generator (PSA nitrogen machine, nitrogen equipment) is a device capable of producing on-demand high-purity industrial nitrogen from the atmosphere. Nitrogen generators (PSA nitrogen generators, nitrogen equipment) can be pressure swing absorption (PSA) or membrane types.
PSA nitrogen generators separate the various components in the air based on their molecular characteristics and affinity for adsorption media (such as zeolites or granular activated carbon), while membrane generators work by using a semipermeable membrane to separate pure nitrogen from the atmosphere. .