Effect of Low Temperature Co2 Injection in High Temperature Oil Reservoirs Using Slimtube Experiment

Hamdi, Zakaria; Awang, Mokhtar

doi:10.11113/jt.v78.9018

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…It easily enters the miscible state and creates a massive reduction in viscosity of the gas-penetrated region. 224 The viscosity reduction could reach up to 70%. 3 CO 2 can reach the miscibility level at the pressure and temperature of most oil reservoirs; in other words, gas solubility plays a critical role in the CO 2 EOR process.…”

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 98%

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Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

et al. 2021

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In recent times, particularly in the 21st century, there has been an alarming increase in the demand for global energy, along with continuous depletion in conventional oil reservoirs. This necessity has incentivized interested scholars and operators worldwide to seek alternative oil resources. To secure such accelerating energy demand, considerable effort has been directed toward the development of previously unconventional oil formations that, in past decades, had remained sidelined. Although shale oil reservoirs have seen tremendous success over the past decade, the continued challenges of rapidly declining oil flow rates and oil retention in the pores continuously persist. Substantial attempts have been made to improve shale-bypassed oil recovery; however, there is little data about the accessibility on recovery mechanisms, especially in the oil field. Furthermore, approachesparticularly, Huff-n-Puff (H-n-P) experiments using conventional proceduresfail to properly represent field conditions and they generate deceptive findings, because the utilized cores are not simulated under realistic reservoir conditions, leaving the significance of critical factors unclear. Therefore, this review study comprehensively and specifically discusses the feasibility of enhanced oil recovery (EOR) methods in unconventional oil reservoirs. Beside addressing the validity of the currently applied H-n-P technology in shale/tight oil reservoirs and underlining some critical gaps regarding laboratory results, modified technology is proposed in this paper for a better field future performance. The study is divided into sections, and each section analyzes the role of one specific H-n-P portion in detail, such as preferable injected solvents, their mechanisms, and critical factors affecting H-n-P recovery. The exceptions to this are the first and second sections, which provide a brief introduction about shale and tight oil reservoirs, a history of applied technology, and the method’s current problem statement. In the Introduction section, the authors will justify why this Review fills a critical gap in the field. Within the assessment study, great focus is given to the H-n-P technique, its parameters, and effective processes. In the final sections, carefully chosen experimental results and tools are reviewed to highlight the controversy and state “the gap”.

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Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 98%

“…Aside from cost, other unique and attractive properties of CO 2 have attracted researchers. It easily enters the miscible state and creates a massive reduction in viscosity of the gas-penetrated region . The viscosity reduction could reach up to 70% .…”

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

et al. 2021

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“…To further extend their production life, enhanced oil recovery (EOR) is vital. EOR as a tertiary recovery mechanism has been proven to increase the recovery factor, therefore, allowing companies to meet the growing energy demand [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Within the domain of EOR lies a variety of methods that could be employed to boost and improve oil recovery from a maturing reservoir. In general, there are four different types of EOR methods: i) Thermal, ii) Gas, iii) Chemical and iv) Microbial [3]. Each comes with its respective purposes for different types of reservoirs with different operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of deep eutectic solvents for light oil recovery through spontaneous imbibition

Ganesan¹,

Hamdi²,

Cheong³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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With the rise in demand for energy, comes the need to extract oil from not only primary and secondary stages, but also from tertiary recovery methods to keep up with the current market. Enhanced oil recovery (EOR) has become more prevalent within maturing reservoirs. Ionic liquids (IL) were highly regarded for chemical EOR until researchers raised concerns about their expensive cost, toxicity, and environmental impacts. Recently, deep eutectic solvents (DES) were discovered as a potential replacement for ILs due to their non-toxic nature, being biodegradable, non-flammable, and cheaper. In this study, the effectiveness of DES is investigated by observing its ability to promote oil recovery through wettability alteration. Spontaneous Imbibition tests along with emulsion and thermogravimetric tests (TGA) are used to achieve the objectives. Results indicated that both DESs can recover oil that was not recoverable using brine only. At higher temperatures, the effectiveness of DES was higher, which allowed for more oil to be imbibed out. The effect of concentration suggested that at high concentrations, DESs exhibit self-destructive properties by increasing interfacial tension (IFT), which reduced the imbibition rate and recovery factor. TGA studies indicate that the thermal stability of DESs is highly dependent on the thermal stability of their hydrogen bond donor (HBD).

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Evaluating Liquid CO2 Injection Technique for Oil Recovery Using Core Flood Experiments

Hamdi

Awang

Ahmad

2016

Day 1 Tue, December 06, 2016

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CO2 injection has been used for several decades as a successful recovery method in enhanced oil recovery. The main impact of CO2 is on lowering minimum miscibility pressure. However, the unfavorable mobility of CO2 force us to use CO2 with other methods such as water alternating gas to minimize this effect. Low temperature CO2 injection may cover the role of the water and other fluids in this process. The injection of CO2 at low temperatures open a unique opportunity to investigate the potential for usage of low temperature CO2 as an enhanced oil recovery method. In this study, the effect of low temperature injection in a high temperature system is evaluated. Earlier studies suggested that this method could be beneficial. However, it is not verified by core flooding experiments. If proven effective, the usage of CO2 would add its advantage along with its current huge economic and environmental advantages against other EOR methods. The results show that injection of low temperature CO2 has a direct impact on recovery factor inside a high temperature system. The main outcome of this study is the proof for the effectiveness of low temperature CO2 usage as early as a reliable secondary recovery method in macro scale without any major unfavorable effects such as early breakthrough and gravity override. This study provides an economic way to increase the recovery while minimum modifications of available techniques are needed. No chemical agents were used as the production cost should be minimized. In addition, this study provides the ability for CO2 storage which also favors other conventional methods in terms of CO2 emission.

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Effect of Low Temperature Co2 Injection in High Temperature Oil Reservoirs Using Slimtube Experiment

Cited by 10 publications

References 14 publications

Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

Effectiveness of deep eutectic solvents for light oil recovery through spontaneous imbibition

Evaluating Liquid CO2 Injection Technique for Oil Recovery Using Core Flood Experiments

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