Thermal EOR Methods and Gas Displacement Processes

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Questions and Answers

Thermal EOR Methods include cyclic steam injection, steam flooding, steam assisted [gravity] drainage (SAGD), in-situ combustion, and electrical heating.

What are the five thermal EOR methods mentioned in the text?

The five thermal EOR methods mentioned in the text are cyclic steam injection, steam flooding, steam-assisted gravity drainage (SAGD), in-situ combustion, and electrical heating.

In-Situ combustion is a thermal recovery process that involves igniting the oil in place to create a fire front that moves through the reservoir, reducing the viscosity of the oil and improving [mobility].

What is the main oil recovery mechanism involved in in-situ combustion?

The main oil recovery mechanism involved in in-situ combustion is the oxidation of heavy oil fractions. Signup and view all the answers

What is the gas displacement process discussed in Chapter 5?

Chapter 5 discusses the gas displacement process, which involves injecting gas into an oil reservoir to displace the oil and improve recovery. Signup and view all the answers

Gas displacement processes involve injecting gas, such as natural gas or carbon dioxide, into the reservoir to [displace] the oil and force it towards production wells.

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What is the definition of EOR and what are the basic principles behind it?

EOR stands for Enhanced Oil Recovery, which refers to the process of extracting more oil from a reservoir than can be achieved through conventional methods. The basic principles behind EOR involve improving sweep efficiency and displacement efficiency, which can be achieved through various techniques such as polymer flooding, steam drive, in situ combustion, CO2 flooding, miscible HC flooding, surfactant flooding, and alkaline flooding. Signup and view all the answers

Why is EOR becoming increasingly important in the oil industry?

EOR is becoming increasingly important in the oil industry due to several reasons, including the continued global demand for energy, the maturing of existing oil fields, the decreasing number of new discoveries of 'giant' fields, and the fact that about half of the oil in place is still unrecoverable by conventional methods. Signup and view all the answers

What are some of the key parameters for IOR and EOR, and what are some of the techniques used for IOR?

Some of the key parameters for IOR and EOR include sweep efficiency, displacement efficiency, mobility ratio, and capillary number. Some of the techniques used for IOR include infill/step-out drilling, secondary recovery, gas flooding (CO2 and hydrocarbon-rich gas), optimizing artificial lift, recompletion, water flooding, increasing well stimulation, workover, reactivating idle wells, changing completion strategy, and microbial (MEOR) and dilute surfactant/chemical treatments. Signup and view all the answers

What is the primary reason for the need of EOR?

To meet global energy demand Signup and view all the answers

What is the difference between IOR and EOR?

IOR focuses on increasing oil production, whereas EOR focuses on increasing oil reserves Signup and view all the answers

What is the primary mechanism for improving sweep efficiency in EOR?

Increasing water viscosity Signup and view all the answers

What is the main reason for the implementation of Enhanced Oil Recovery (EOR)?

To recover unrecoverable oil by conventional methods Signup and view all the answers

Which of the following is NOT a method of Enhanced Oil Recovery (EOR)?

Oil flooding Signup and view all the answers

What is the action on sweep efficiency at the microscopic scale in Enhanced Oil Recovery (EOR)?

Reducing the interfacial tension Signup and view all the answers

Study Notes

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Description

Learn about the five thermal EOR methods including in-situ combustion, cyclic steam injection, steam flooding, SAGD, and electrical heating. Understand the main oil recovery mechanism involved in in-situ combustion and the gas displacement process discussed in Chapter 5.