Enhanced oil recovery processes in sandstone reservoirs containing light oil in offshore fields

Przybyłowicz, Joanna; Rychlicki, S.

doi:10.7494/drill.2014.31.1.99

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…The selection of appropriate EOR scheme depends on the reservoir fluids and rock properties. Therefore, enhanced oil recovery schemes are reservoir specific (Ali and Thomas 1989;Satter et al 2008;Przybylowicz and Rychlicki 2014). North Sea reservoirs are deep and have light and low viscosity oils (Watkins 2002).…”

Section: Introductionmentioning

confidence: 99%

A review of gas enhanced oil recovery schemes used in the North Sea

Gbadamosi

Kiwalabye

Junin

et al. 2018

J Petrol Explor Prod Technol

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The rate of replacement of produced oil and gas reserves by new discoveries is in a state of steady decline. Instead of searching for rare new oil fields, it is more economically justified to improve production from the existing and known fields. This is often achieved using enhanced oil recovery (EOR) technologies. The application of EOR in the North Sea dates to the mid-1970's with most of the fields being flooded with gas due to their light oils. Following a critical review of relevant published literature, the EOR methods in the past five decades are: water alternating gas (WAG), miscible gas injection (MGI), foam assisted water alternating gas (FAWAG), simultaneous water and gas (SWAG), and microbial enhanced oil recovery. The first part of this paper explores the advantages and limitations of the field implementation of gas EOR methods in North Sea oil fields. In the second part, new screening criteria of WAG, SWAG, MGI and FAWAG were developed by performing statistical analysis of the data from the past field experiences, especially in the North Sea. The screening criteria of the future methods are clearly documented in the literature and therefore not covered in this study. From the screening criteria, it has been identified that most North Sea fields qualify for WAG. This explains why WAG has been the most common scheme in the North Sea. FAWAG should also be implemented either after WAG or SWAG when the residual oil saturation is < 20%.

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Section: Introductionmentioning

confidence: 99%

A review of gas enhanced oil recovery schemes used in the North Sea

Gbadamosi

Kiwalabye

Junin

et al. 2018

J Petrol Explor Prod Technol

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2022

Artificial Intelligence and Data Analytics for Energy Exploration and Production

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Superactive Surfactant for Enhanced Oil Recovery

AlRadhwan¹,

Hamad²,

Abdallah³

2023

Day 2 Mon, February 20, 2023

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After primary and secondary oil recovery, a large amount of oil is left behind in the reservoir. Enhanced oil recovery (EOR) techniques are introduced to recover additional oil from the reservoir. Chemical EOR is one of the commonly used EOR techniques. It involves the use of chemical substances such as surfactants. Surfactants are commonly used in the petroleum industry because they have the ability to change the water-oil interface as well as the properties of the rock surface. The use of such surfactants depends on technical, financial, and environmental factors. In this study, the performance of a new superactive surfactant is evaluated for use as an oil recovery agent for carbonate and sandstone formations. The surfactant showed high stability in deionized water and seawater, with strong ability to lower the interfacial tension of different crude oils (light, medium, and heavy) at a very low concentration (i.e., 0.05 wt%). The maximum reduction in interfacial tension reached 99.5%. The surfactant also showed significant surface wettability alteration toward water-wet at the tested concentration, with maximum reduction of 87%. From the interfacial tension and wettability experiment results, the optimum system was obtained for the medium crude oil and seawater at surfactant concentration of 0.05 wt%. Therefore, the coreflooding experiments on carbonate and sandstone samples were carried out using this system. Results showed a significant additional oil recovery by the surfactant injection. Additional oil of 43% was recovered from the carbonate core samples, while 16% recovered from the sandstone sample. With these results, this new surfactant can be potentially considered as a new agent for enhancing oil recovery from carbonate and sandstone formations.

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Enhanced oil recovery processes in sandstone reservoirs containing light oil in offshore fields

Cited by 3 publications

References 12 publications

A review of gas enhanced oil recovery schemes used in the North Sea

A review of gas enhanced oil recovery schemes used in the North Sea

References

Superactive Surfactant for Enhanced Oil Recovery

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