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Hybrid Energy Systems for O&G Industries
Published in Yatish T. Shah, Hybrid Energy Systems, 2021
Thermal EOR consists of injecting steam into the oil reservoir to facilitate flow by reducing the viscosity of the oil. Natural gas is used as an energy source to produce steam, which is then injected into the reservoir. Solar thermal EOR substitutes natural gas with concentrated solar power (CSP) as the energy source for producing steam [32]. Trough-shaped mirrors, sometimes housed in a protective greenhouse, concentrate sunlight to generate steam with temperatures up to 640°F [33].
Formulation of a Stable Microemulsion Slug for Enhanced Oil Recovery in the Upper Assam Basin
Published in Subrata Borgohain Gogoi, Advances in Petroleum Technology, 2020
Shilpi Sarmah, Subrata Borgohain Gogoi, Fan Xianfeng
Currently, the demand for oil and gas is increasing worldwide. However, new exploration of oil and gas fields is reducing constantly. Oil recovery techniques play a vital role in solving this issue. The oil recovery process can be classified into three important stages, which are primary recovery, secondary recovery and tertiary recovery [64]. Enhanced oil recovery (EOR), also known as tertiary oil recovery, is a method for recovering the amount of residual oil left over in the reservoirs after primary and secondary oil recovery. EOR is a technique which improves oil production through injection of chemicals and gas to ease the mobility of hydrocarbons (HCs). There are three main types of EOR techniques which are used at present, which are thermal, miscible and chemical [65]. In recent years, microemulsion flooding is favoured among the EOR techniques. There are various companies which have implemented the application of microemulsion flooding, which is a better alternative method compared to other EOR techniques.
Application of Nanofluids in Enhanced Oil Recovery: A Systematic Literature Review and Organizing Framework
Published in K.R.V. Subramanian, Tubati Nageswara Rao, Avinash Balakrishnan, Nanofluids and Their Engineering Applications, 2019
Majid Mohammadi, Mehdi Sedighi, Abdolhossein Hemmati-Sarapardeh
In other words, EOR is a technique which allows the extraction of an increased percentage of the original oil in place into a reservoir after the first two extraction stages, as indicated in Figure 20.3.
Techno-economical optimization of water-alternating-CO2/dimethyl ether process for enhanced oil recovery
Published in Petroleum Science and Technology, 2023
Yoo Jin Choi, Kwangduk Seo, Kun Sang Lee
Enhanced oil recovery (EOR) is a technique that aims to extract more oil from reservoirs beyond what is recovered by primary and secondary methods. EOR involves injecting fluids such as steam, carbon dioxide, and chemicals into the reservoir to increase oil recovery. Recently, studies have extended to EOR using nanomaterials (El-Masry et al. 2023; Bou-Hamdan et al. 2022). This technique is crucial as it significantly increases the amount of oil that can be extracted, leading to improved energy security and increased revenue. Currently, EOR using CO2 is one of the most widely used methods. However, CO2 has a large difference in density and viscosity compared to oil, which reduces the sweep efficiency. Through extensive EOR studies conducted on various solvents, dimethyl ether (DME) is recognized as a potential solvent for EOR (Groot et al. 2016; Javanmard, Seyyedi, and Nielsen 2018; Cui, Qi, and Dindoruk 2020; Salimi, Ameri, and Nieuwerf 2022).
A systematic bibliometric review on enhanced oil recovery by gas injection
Published in Petroleum Science and Technology, 2022
There are three primary techniques of EOR: gas injection, thermal injection, and chemical injection. Gas injection, typically referring to miscible flooding, is presently the most-commonly used approach in EOR. The successful implementation of a gas injection project requires a comprehensive knowledge of fundamental theories and field experiences, which can be obtained from reviewing the pertinent literature. A considerable amount of literature has been published on EOR by gas injection in terms of miscible flooding theories, oil recovery mechanisms from experimental, simulation and modeling investigations, and field applications. Despite extensive research and significant applications of gas injection in hydrocarbon reservoirs, the existing literature is limited either to a particular aspect of gas injection such as CO2 flooding or general reviews on parts of the topics mentioned above. Furthermore, with the rapid expansion of relevant research fields of gas injection, it is critical for researchers to grasp the state of the art and emerging trends of collective knowledge.
Recent developments, challenges and opportunities for harnessing solar renewable energy for thermal Enhanced Oil Recovery (EOR)
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Ramesh V. K., V. Chintala, Suresh Kumar
The EOR refers to a method used to recover additional oil from a reservoir than by primary and secondary recoveries. The purpose of EOR is to increase Recovery Factor of the reservoir by moving the unmovable oil. Currently, a substantial fraction of total oil production is being contributed by EOR, and it shows an increasing trend. Among the worldwide-executed EOR projects, majority of EOR projects i.e., about 193 projects are being deployed in the United State (US) (Al-Mutairi, Kokal, and Aramco 2011). For instance, Venezuela is executing 49 EOR projects, followed by Canada and China, both of which are executing 39 EOR projects each. Not only in the US, several other EOR projects are being under process to extract the heavy crude oil resources around the world i.e., there are more than 300 live EOR projects running (Al-Mutairi, Kokal, and Aramco 2011).