How to Store PetroleumOil Storage in Tanks: This is the most common and widely used method of oil storage. Oil tanks can be divided into above-ground oil tanks and underground oil tanks, as well as floating-roof tanks and fixed-roof tanks. Above-ground oil tanks are easy to construct and maintain, but they occupy a relatively large area. Underground oil tanks, on the other hand, are more concealed and have a high level of safety. Floating-roof tanks can reduce the evaporation loss of oil products and improve economic benefits.
Oil Storage in Tankers: When onshore storage facilities are insufficient, large tankers can serve as floating oil storage facilities, especially suitable for short-term storage needs in the international market. This method is highly flexible, but the storage cost is relatively high.
Oil Storage in Underground Salt Caverns: Huge caverns are excavated or dissolved in geologically stable salt rock layers to store petroleum. This method is safe, has good sealing performance, and is suitable for long-term storage.
Oil Storage in Lakes or Abandoned Mines: Under specific conditions, emptied lakes or abandoned mines can be used for the temporary storage of petroleum. However, this is usually not the preferred option, and it may pose certain environmental risks.
Underground Water-Sealed Rock Cavern Oil Depots: Caverns are excavated for oil storage in rock areas with stable groundwater. Sealed by the groundwater layer, this method is suitable for safe and long-term storage.
When choosing a storage method, factors such as cost, safety, environmental impact, geographical location, the nature of the petroleum, and the storage duration are taken into consideration. Countries and enterprises may adopt a strategy of combining one or more methods to store petroleum according to their own needs and resource conditions.
Methods of Petroleum Storage
The storage methods of petroleum usually vary according to scale, purpose, and safety considerations. The main methods include the following:
Underground Storage: Underground storage involves storing petroleum in underground storage facilities, including underground oil depots, salt caverns, oil and gas fields, etc. Underground storage can effectively protect petroleum from the influence of the external environment and, at the same time, reduce the risks of petroleum volatilization and leakage.
Surface Storage: Surface storage includes facilities such as storage tanks and oil storage ponds, which are usually used for temporary storage or distributed storage. For surface storage facilities, safety measures such as fire prevention, explosion prevention, and corrosion prevention need to be considered.
Marine Vessel Storage: Petroleum can be stored on vessels such as tankers, which is suitable for marine storage or temporary storage. When it comes to marine vessel storage, the marine environment and safety issues usually need to be considered.
Transportation Pipelines: Transportation pipelines can be used for the long-term storage and transportation of petroleum. The petroleum in the pipelines can serve as temporary storage, but the safety of the pipelines and the issue of leakage need to be considered.
Storage Tanks: Storage tanks are large containers specifically designed for storing petroleum, usually used for the transfer and distribution of petroleum products. Storage tanks need to be regularly inspected and maintained to ensure safety.
How Long Can Petroleum Be Stored?
Petroleum generally does not have a fixed shelf life because the composition of petroleum is extremely complex, consisting of a mixture of a large number of substances such as alkenes, alkynes, hydrocarbons, and alkanes, and its composition is not constant.
Underground petroleum has existed for hundreds of millions of years, and its composition is changing. However, humans manufacture refined oil by separating various chemical substances, which can be achieved even if the composition changes. Therefore, there is no issue of expiration for petroleum itself. However, if petroleum is stored outdoors for a long time, some unpredictable and irreversible changes will occur in its composition, leading to the loss of valuable substances in the petroleum itself. Therefore, although petroleum itself has no shelf life, when storing it, attention still needs to be paid to avoiding long-term outdoor storage to ensure its quality and value.
