For heavy and extra-heavy oil, in-situ combustion method is a fire flooding process applied as an enhanced oil recovery method to recover oil from the reservoir. In typical practice, for extra heavy oil which has viscosity in the hundreds of thousands to millions of cP, thermal recovery methods such as ISC are used to recover to oil. Most heavy oil reservoirs cannot be produced by conventional methods due to the high viscosity of the oil which is typically in the hundreds to thousands to tens of thousands of cP. Using a combustion or oxidation tube as in injection well for injection and production well for fluid production. For the injection of air/water into the reservoir requires to study and understand the reservoir and its parameters like the oil viscosity, fuel, combustion parameters. It is believable that for free oxygen escaped is because of the channellings with which many corrosion problems could be predicted. The amount of heat generated in reservoir is to hold up the combustion process. The process is fuel dominant, where the ignition takes place as quickly as the fuel is absorbed by the oxygen present in the injected air. The objective of this page is to describe the potential of in-situ combustion as an economically viable oil recovery technique for a variety of reservoirs.įor a more complete review, the work of Sarathi, Prats, and Burger et al. Most of those failures came from the application of a good process to the wrong reservoirs or the poorest prospects. In general, there are two variations of the in-situ combustion process which are the Reverse & Forward combustion. On the other hand, ISC can generated severe corrosion, toxic gas production, and gravity override and can be hard to control within the reservoir. 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. There are two major of the in-situ combustion process namely, Reverse combustion & Forward combustion. It 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. EOR processes can be divided into thermal and non-thermal recovery processes and ISC is a thermal process. Enhanced oil recovery (EOR) techniques are needed when unfavourable conditions such as heavy-oil, high IFT, low matrix permeability, oil wet matrix and poorly connected fracture network exist in an oil reservoir. The most common fluid injected is air but there are some cases in which enriched oxygen gas or air is injected. Heavy oil is suppressed in naturally fractured reservoirs in many places around the world and might possibly provide to the world’s energy supply. In situ combustion (ISC) is applied as one of the oldest methods of enhanced oil recovery process in petroleum industry. The most common fluid injected is air but there are some cases in which oxygen enriched gas or air is injected. In-situ combustion (ISC) is an Enhanced oil recovery process for heavy oil in which an oxygen-containing gas is injected into a reservoir where it reacts with crude oil to create a high-temperature combustion zone that generates combustion gases and creates a heated front that propagates through the reservoir. In-situ combustion (ISC) is a displacement process in which an oxygen-containing gas is injected into a reservoir where it reacts with crude oil to create a high-temperature combustion zone that generates combustion gases and creates a heated front that propagates through the reservoir. In-situ combustion is regarded as a high-risk process by many, primarily because of the many failures of early field tests. It has been used for more than nine decades with many economically successful projects. In-situ combustion is the oldest thermal recovery technique.
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