What is in situ combustion?

What is in situ combustion?

In situ combustion, or fire flooding, is a unique EOR process because a portion of the oil-in-place is oxidized and used as a fuel to generate heat. In the in situ combustion process, the crude oil in the reservoir is ignited and the fire is sustained by air injection.

What is the reverse process of combustion?

A type of in-situ combustion in which the burning front moves in an opposite direction to the injected air. Initially, air is injected into a production well and the fire is ignited.

What is forward combustion?

Forward combustion involves movement of the hot front in the same direction as the injected air while reverse combustion involves movement of the hot front opposite to the direction of the injected air.

Is the heat loss in in situ combustion same as in steam injection *?

The process has some advantages over steam injection including higher thermal efficiency, relatively small heat loss to the overburden, no heat losses in the wellbore, and it can be applied in deeper and high-pressure reservoirs.

What is wet combustion?

An in situ combustion technique in which water is injected simultaneously or alternately with air into a formation. Wet combustion actually refers to wet forward combustion and was developed to use the great amount of heat that would otherwise be lost in the formation.

Is the combustion of methane reversible?

An example of a combustion reaction is the combustion of methane, where methane burns in oxygen to produce carbon dioxide and water. If this reaction were reversible, it would have to go in the reverse direction, where carbon dioxide reacts with water to form methane and oxygen.

Can we reverse the process of combustion why why not?

The chemical equation for a combustion reaction is: Fuel + O2 → CO2 + H2O. In a complete combustion reaction, fuel and oxygen are the reactants and the products are carbon dioxide and water. These two products cannot react to reform the fuel and oxygen, so the reaction is irreversible.

What is IOR and EOR?

Our Importer of Record – Exporter of Record (IOR/EOR) service is a global program that enables US based companies to export non-revenue international shipments to other countries without paying the taxes and duties associated with a Temporary Import License.

What is steam injection process?

Using this technique, wet saturated steam is first injected into a well under a high temperature and pressure. After enough steam has been injected, the steam is left to soak by keeping the well shut for a few days to heat the oil in the reservoir. Oil is then produced by reopening the well (hot-oil puffing).

What is steam injection in oil and gas?

Steam injection is a very well understood EOR method, used commercially since the 1960s. The injection of steam lets heat the crude oil in the formation thus lowering its viscosity and vaporizing some of the oil to increase its mobility.

Is burning of natural gas exothermic?

The combustion of methane or octane is exothermic; it releases energy.

Why is combustion irreversible?

What energy is released when we burn natural gas?

During the combustion reaction, the hydrocarbon molecules are converted to carbon dioxide and water. Every mole of methane (16 g) releases 810 KJ of energy on burning. Combustion energetics can be estimated from the bond energies for all the classifications of fossil fuels.

What does incomplete combustion?

Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. In general for incomplete combustion: hydrocarbon + oxygen → carbon monoxide + carbon + water. The carbon is released as soot .

What are the different techniques of EOR?

There are three primary techniques of EOR: gas injection, thermal injection, and chemical injection. Gas injection, which uses gases such as natural gas, nitrogen, or carbon dioxide (CO2), accounts for nearly 60 percent of EOR production in the United States.

What does IOR stand for?

Importer of record
The abbreviation IOR may refer to: Importer of record, term in import and export. inclusive or – as opposed to XOR (exclusive OR) Independent Order of Rechabites. Index of refraction.