Question:
In-situ combustion method for enhanced oil recovery is commonly used for
In-situ combustion method for enhanced oil recovery is commonly used for
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Thermal EOR (steam flooding, in-situ combustion) \Rightarrow\ think {heavy/extra-heavy oil}: the goal is to cut viscosity and mobilize the crude.
Updated On: Aug 29, 2025
- gas condensate reservoirs
- light oil reservoirs
- brown oil reservoirs
- heavy oil reservoirs
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The Correct Option is D
Solution and Explanation
Step 1: What is in-situ combustion?
It is a thermal EOR method where a portion of the reservoir oil is ignited; the combustion front moves through the formation, generating heat.
Step 2: Why for heavy oil?
Heavy oils are highly viscous; heating dramatically lowers viscosity and improves mobility and displacement efficiency. The generated flue gases also aid drive.
Step 3: Eliminate other options.
Gas condensate and light-oil reservoirs already have good mobility; thermal methods are unnecessary or inefficient compared to gas or miscible processes. “Brown oil” is not a distinct fluid type for which thermal EOR is preferred.
Conclusion: In-situ combustion is best suited to heavy oil reservoirs.
It is a thermal EOR method where a portion of the reservoir oil is ignited; the combustion front moves through the formation, generating heat.
Step 2: Why for heavy oil?
Heavy oils are highly viscous; heating dramatically lowers viscosity and improves mobility and displacement efficiency. The generated flue gases also aid drive.
Step 3: Eliminate other options.
Gas condensate and light-oil reservoirs already have good mobility; thermal methods are unnecessary or inefficient compared to gas or miscible processes. “Brown oil” is not a distinct fluid type for which thermal EOR is preferred.
Conclusion: In-situ combustion is best suited to heavy oil reservoirs.
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