Study on CO2 EOR and its geological sequestration potential in oil field around Yulin city

Li-zhong, HE; Shen, Pingping; Li, Xinwei; Gao, Qichao; Wang, Chengsheng; Li, Fangfang

doi:10.1016/j.petrol.2015.06.002

Cited by 44 publications

(10 citation statements)

References 10 publications

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“…Among different gases injected to the reservoir, CO 2 has received the most attention. Due to its lower solubility pressure and higher solubility in brine it is the most widely injected EOR gas. − This has the additional benefit of mitigating climate effects, which CO 2 would otherwise produce. − CO 2 injection into oil and gas reservoirs improve oil and gas recovery from these reservoirs as well as securing CO 2 from the atmosphere, however the technical challenges still. − …”

Section: Introductionmentioning

confidence: 99%

“…One of the critical challenges associated with any CO 2 flooding is the high velocity of the injected CO 2 , which causes viscous fingering and poor sweep. , In addition, because of high mobility of injected CO 2 and the risk of CO 2 leakage from the reservoir, the efficiency of CO 2 sequestration could be affected. ,− The use of water to reduce and control the mobility of injected gas has been proposed to improve the performance of gas injection; however, technical challenges are still present. The presence of water reduces the rate of CO 2 mass transfer, oil swelling, and viscosity reduction and, thus, lowers the oil recovery. − …”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Interfacial Tension Measurement and Oil Recovery by Carbonated Water Injection: A Case Study Using Core Samples from an Iranian Carbonate Oil Reservoir

et al. 2017

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Low volumetric sweep efficiency, early breakthrough of injected fluid, and high risk of gas leakage from the reservoir are the major technical challenges associated with direct gas and water injection into oil reservoirs. Injection of carbonated water (CW) into oil reservoirs is a carbon dioxide-augmented water injection technique, which results in improved oil recovery and possible CO 2 storage in the reservoir. In this paper, the potential of carbonated water injection (CWI) into an Iranian carbonate reservoir for the purpose of improving oil recovery was investigated. In addition, the interfacial tension (IFT) of crude oil and two different carbonated brines (carbonated formation brine and carbonated seawater) as well as CO 2 solubility in these two carbonated brines was determined. Experimental results showed that CO 2 solubility in both brines increases with pressure and decreases with temperature. However, CO 2 solubility was more promising in seawater compared to formation brine because of the lower salinity. The IFT results showed that increasing the temperature from 40 to 100°C and increasing the pressure from 1000 to 2500 psi had a positive impact on reducing the IFT between carbonated brines and oil. In addition, core flooding experiments showed that oil recovery increased with CWI as compared to conventional water flooding (WF). However, secondary carbonated water injection (SCWI) resulted in higher oil recovery compared to tertiary carbonated water injection (TCWI). A maximum oil recovery of 21.75%, 61.63%, and 52.58% was achieved with conventional WF, SCWI, and TCWI, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Interfacial Tension Measurement and Oil Recovery by Carbonated Water Injection: A Case Study Using Core Samples from an Iranian Carbonate Oil Reservoir

et al. 2017

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“…Air permeability was then determined at the remaining water saturation (S wf ) level. These experiments were repeated by changing the different parameters such as different temperatures (27-100 °C), different injection pressures (1-7 MPa), and different confining pressures (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The effect of the brine types on permeability was investigated by using three different brines which comprise formation brine, sea water and fresh water.…”

Section: Methodsmentioning

confidence: 99%

“…Numerous studies [9][10][11][12][13][14][15] have examined CO 2 sequestration in saline aquifers with a focus on CO 2 solubility trapping mechanisms. Their findings showed that CO 2 solubility is greatly influenced by CO 2 pressure, temperature, and salinity.…”

Section: Introductionmentioning

confidence: 99%

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Karaei

Honarvar

Azdarpour

et al. 2019

Period. Polytech. Chem. Eng.

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The lack of fundamental experimental studies on low permeable carbonate reservoirs for CO2 sequestration purposes is essential for further application of CO2 sequestration as a highly-anticipated CO2 mitigation method in deep saline aquifers, specifically those with low permeabilities. The core samples were taken from a carbonate reservoir in Iran and the brine composition was based on that of the same formation. The objective of this study is to investigate permeability alteration during CO2 sequestration in the aquifers of a low permeable Iranian carbonate reservoir. Various parameters have been investigated. The effects of different parameters such as injection pressure, confining pressure, and temperature on permeability alteration of the cores was investigated. Moreover, the interfacial tension (IFT) of CO2/brine was also determined at pressures and temperatures up to 7 MPa and 100 °C, respectively. The experimental results showed CO2 solubility and rock dissolution to be the governing mechanism when CO2 was injected into carbonate cores. The permeability measurements showed that permeability increases by increasing injection pressure and decreases by increasing confining pressure and temperature. The IFT measurement results showed that the IFT decreases significantly when there is an increase in pressure and temperature.

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“…Recently, Li-ping et al [39] conducted an evaluation study around Ordos Basin in Yulin city of China; this Basin was divided into 17 reservoirs and is considered as the first largest lowpermeability proliferous onshore basin in China with proved reserves more than 10 9 t. These authors conclude that Ordos Basin has good geographical and geological conditions for CO 2 storage, and it has nine reservoirs suitable for CO 2 immiscible flooding and eight reservoirs suitable for CO 2 miscible flooding. The average incremental oil recovery ratios for immiscible and miscible flooding are 6.44 and 12%, respectively.…”

Section: Mehrotra Andmentioning

confidence: 99%

A Review on the Application of Enhanced Oil/Gas Recovery through CO2 Sequestration

Atia¹,

Mohammedi²

2018

Carbon Dioxide Chemistry, Capture and Oil Recovery

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Global warming is considered as one of very important problems in the last few years. This phenomenon is caused primarily by increase in greenhouse gases such as carbon dioxide (CO 2). Natural events and human activities are believed to be the principal sources of this problem. A promising long-term solution for mitigating global heating is to inject CO 2 into oil field geological formations for combination between CO 2 sequestration and enhanced oil recovery. This chapter aims to give an extensive literature survey and examines research papers that focus on EOR-CO 2 processes and projects that have been tested in the field.

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Study on CO2 EOR and its geological sequestration potential in oil field around Yulin city

Cited by 44 publications

References 10 publications

Experimental Investigation of Interfacial Tension Measurement and Oil Recovery by Carbonated Water Injection: A Case Study Using Core Samples from an Iranian Carbonate Oil Reservoir

Experimental Investigation of Interfacial Tension Measurement and Oil Recovery by Carbonated Water Injection: A Case Study Using Core Samples from an Iranian Carbonate Oil Reservoir

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

A Review on the Application of Enhanced Oil/Gas Recovery through CO2 Sequestration

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