Chemical-assisted minimum miscibility pressure reduction between oil and methane

Almobarak, Mohamed; Wu, Zangyuan; Myers, Matthew; Wood, Colin D.; Maskari, Nasser S. Al; Liu, Yongbing; Rommerskirchen, Renke; Saeedi, Ali; Xie, Quan

doi:10.1016/j.petrol.2020.108094

Cited by 13 publications

(10 citation statements)

References 53 publications

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“…It worth mentioning that the chemicals were tested to be thermally stable under high temperature conditions (up to 150 °C). In this work, a chemical concentration of 2 wt % in the oil phase at 373 K has been used in all experiments, and we have detailed the rationale for this approach previously …”

Section: Methodsmentioning

confidence: 99%

“…Figure shows a schematic diagram of the experimental apparatus used in this study. The IFT values were calculated using the axisymmetric drop shape analysis (ADSA) technique through the pendant drop method. , The same procedures used in a prior study were also used for this study …”

Section: Experimental Section and Proceduresmentioning

confidence: 99%

“…This is particularly evident in the methane-oil system which typically has a higher initial MMP compared to other gases. Previously, we have shown that surfactant molecules based on alkoxylated alcohols could reduce the MMP by up to 9% for a methane-crude oil system at 373 K …”

Section: Introductionmentioning

confidence: 99%

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Effect of Functional Groups on Chemical-Assisted MMP Reduction of a Methane-Oil System

et al. 2021

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Natural gas injection (i.e., recycling) is a commonly used for enhanced oil recovery method and is potentially costeffective and efficient. However, natural gas injection, particularly methane, often has a high minimum miscibility pressure (MMP) which likely exceeds the fracture pressure of many otherwise viable reservoirs. Therefore, this work aims to investigate the potential of chemical-assisted MMP reduction of the methane-oil system to expand the application of miscible natural gas injection to more candidate reservoirs. In this context, we performed a study to test six potential surfactant-like chemicals with different polar headgroups (i.e., morpholine, aromatic sulfonic acid, aromatic carboxylic acid, and 2-oxypyrrolidine). The intent is to reduce the methane-oil interfacial tension using the vanishing interfacial tension method at a constant temperature of 373 K. First, at a concentration of 2 wt %, we tested the effect of the polar headgroups with the same hydrocarbon chain. Then, we investigated the effect of increasing the hydrocarbon chain length on the methane-oil miscibility. Our results show that chemical additives with the 2oxopyrrolidine and aromatic sulfonic acid functional groups give higher MMP reductions (8.7−9.6%, respectively) compared with aromatic carboxylic acid and morpholine groups, which only give limited or no MMP reduction. Moreover, the results show that the reduction in first contact miscibility pressure is higher (12.8−19.1%) compared to MMP. Furthermore, increasing the hydrocarbon chain length (from 10 to 13) of the 2-oxopyrrolidine and aromatic sulfonic acid molecules seems to decrease the efficiency in reducing MMP. Our results screen the potential of a combinatorial chemistry approach (where two molecules with differing sizes and functional groups can be readily joined together to make a large library of compounds) that can be used to identify chemical additives for reducing MMP of methane-oil. This approach underscores the importance of optimizing the functional group and hydrocarbon chain length in potential chemicals for MMP reduction. The outlined research results likely expand the application of miscible natural gas injection to deep and/or high-temperature reservoirs, in addition to the environmental benefits of reducing gas flaring and greenhouse gas emissions through natural-gas recycling.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Section and Proceduresmentioning

confidence: 99%

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Effect of Functional Groups on Chemical-Assisted MMP Reduction of a Methane-Oil System

et al. 2021

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“…For methanol-treated CO 2 , IFTdifference varied from 0.02 to 0.2 mN/m; whereas for ethanoltreated CO 2 , IFT-difference varied from 0.02 to 1.42 mN/m. IFT reduction was more pronounced using ethanol-treated CO 2 because longer-chain alcohols can extract heavier components of hydrocarbons more readily than can shorter-chain alcohols (Rudyk et al, 2013;Almobarak et al, 2021).…”

Section: Effect Of Alcohol-treated Co 2 On Iftmentioning

confidence: 99%

“…They suggested that the pressure at which IFT becomes zero is MMP. This graphical approach to estimating MMP is called vanishing interfacial technique (VIT) (Rao, 1997;Ayirala et al, 2003;Ahmad et al, 2016;Almobarak et al, 2021). Yang et al (2019) further observed a 9.4 MPa reduction in MMP when alcohol-treated oil was used.…”

Section: Introductionmentioning

confidence: 99%

Effect of alcohol-treated CO2 on interfacial tension between CO2 and oil, and oil swelling

Saira

Yin

Le-Hussain

2021

Adv. Geo-Energy Res.

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Effects of CO2-philic nonionic polyether surfactants on miscibility behaviors of CO2–hydrocarbon systems: Experimental and simulation approach

Dong

Sarma

et al. 2023

Chemical Engineering Journal

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Chemical-assisted minimum miscibility pressure reduction between oil and methane

Cited by 13 publications

References 53 publications

Effect of Functional Groups on Chemical-Assisted MMP Reduction of a Methane-Oil System

Effect of Functional Groups on Chemical-Assisted MMP Reduction of a Methane-Oil System

Effect of alcohol-treated CO2 on interfacial tension between CO2 and oil, and oil swelling

Effects of CO2-philic nonionic polyether surfactants on miscibility behaviors of CO2–hydrocarbon systems: Experimental and simulation approach

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