Selection of hydrocarbon gas for huff-n-puff IOR in shale oil reservoirs

Ozowe, Williams; Zheng, Shuang; Sharma, Mukul M.

doi:10.1016/j.petrol.2020.107683

Cited by 25 publications

(6 citation statements)

References 2 publications

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Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

“…In 2020, a valuable simulation study has been performed by Ozowe et al 186 to investigate then H-n-P process on a typical EF field. Their attention was primarily on the influence of phase behavior on the injection of C 1 , CO 2 , C 2 , and N 2 , and also on a mixture of hydrocarbon gas with different compositions of C 1 , C 2 , and C 3 .…”

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

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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: 99%

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

Section: Eor Methods In Shale/tight Oil Basinsmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2021

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“…Shale oil reservoirs are mostly featured with ultralow permeability as well as a high-temperature and high-pressure environment, which makes it difficult to inject water and/or chemical agents . As reported, the injection of gas, such as CO 2 , N 2 , hydrocarbon gas, etc., is more appropriate for the development of shale oil as a result of its better injectability and higher sweep efficiency. − Additionally, the feasibility of air injection in shale oil reservoirs was discussed by Jia et al, in which the oxidation reactions between shale oil and oxygen had been proven to play a significantly important role in air injection.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Characteristics and Kinetics of Shale Oil Using High-Pressure Differential Scanning Calorimetry

Zhao

et al. 2021

Energy Fuels

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In situ combustion (ISC) has received much attention in the area of the development of shale oil reservoirs in recent years. The primary mechanism of interest for ISC is the oxidation kinetics of the shale oil with injected oxygen. In this paper, the oxidation characteristics of one shale oil collected from the Xinjiang oilfield were researched using high-pressure differential scanning calorimetry (HP-DSC). Then, the influences of quartz sand and shale detritus on the heat liberated of shale oil were analyzed. Subsequently, the kinetic parameters were determined using two iso-conversional models, Friedman and Ozawa–Flynn–Wall (OFW). The differential scanning calorimetry (DSC) profiles peaked at 317 and 454 °C with heat flows of 4.38 and 7.16 mW/mg, respectively, while the HP-DSC profiles peaked at 301 and 431 °C with heat flows of 32.6 and 7.92 mW/mg, respectively. This finding showed that the heat release yielded by shale oil oxidation was enhanced at 5 MPa compared to 0.1 MPa, especially in the low-temperature oxidation (LTO) region. The shale oil was subjected to a fairly higher heat release yielded by LTO rather than high-temperature oxidation (HTO) at 5 MPa, contrary to the DSC results measured at 0.1 MPa. The shale detritus could accelerate the oxidation reactions of shale oil. At the HTO interval, the activation energy was reduced apparently after the addition of shale detritus, suggesting that shale detritus generated a strong catalytic effect on reducing combustion difficulty. Therefore, it is believed that spontaneous ignition may be achieved during shale oil oxidation.

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Cyclic gas injection

Noruzi

Sharifi²

2023

Gas Injection Methods

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Selection of hydrocarbon gas for huff-n-puff IOR in shale oil reservoirs

Cited by 25 publications

References 2 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

Oxidation Characteristics and Kinetics of Shale Oil Using High-Pressure Differential Scanning Calorimetry

Cyclic gas injection

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