Monitoring on CO2 migration in a tight oil reservoir during CCS-EOR in Jilin Oilfield China

Ren, Bo; Ren, Shaoran; Zhang, Liang; Guoli, Chen; Zhang, Hua

doi:10.1016/j.energy.2016.01.028

Cited by 138 publications

(45 citation statements)

References 25 publications

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“…As a result, it is not seriously considered. Geological storage, which is different from surface mineralization and ocean storage, is widely accepted as the best short‐to‐medium term option to significantly reduce anthropogenic CO 2 from the atmosphere 8,11–15 . Geological storage refers to injecting CO 2 into geological structures and storing it permanently or for long periods of time, in the order up to millions of years 8 .…”

Section: Introductionmentioning

confidence: 99%

Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

et al. 2020

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Geological storage of CO 2 technologies has become an important and effective way to reduce the greenhouse gas emissions, especially when it is combined with CO 2 enhanced oil recovery (EOR), which can not only trap CO 2 but also enhance oil recovery. However, the risk of CO 2 leakage has always been a prominent issue. In this paper, the mechanisms and pathways of CO 2 leakage during geological storage in oil reservoirs were analyzed using fault tree analysis (FTR). Besides, monitoring technologies were discussed and deployed in a CO 2 EOR demonstration project. The analysis results showed that the sealing failures of oil producer and CO 2 injector wells, like well cement failure and casing failure, are the main reasons for the CO 2 leakage, which has been observed in the oil field monitoring project. The monitoring results indicated that there is no large-scale CO 2 leakage, while relatively high and abnormal CO 2 concentration in soil gas near some wellbores are observed, which indicates there is some leakage of CO 2 through incomplete cement ring and well casing string. FTR results provide guidelines for monitoring and preventing of CO 2 leakage during geological storage in oil reservoirs. The near-surface monitoring methods, especially the soil gas monitoring technologies, can effectively detect the leakage of CO 2 , and are a proper method for CO 2 leakage monitoring. C 2020

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Section: Introductionmentioning

confidence: 99%

Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

et al. 2020

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“…Therefore, CO 2 offers better injectivity to the rock matrix than the injected water, and it is more advantageous than other gases such as nitrogen gas. This makes CO 2 the best candidate for improving the tight oil recovery . Several studies report that it can achieve an incremental oil recovery in the range of 5%‐20% in the Bakken and Eagle ford reservoirs using the huff‐n‐puff gas process .…”

Section: Introductionmentioning

confidence: 99%

“…This makes CO 2 the best candidate for improving the tight oil recovery. 2,[15][16][17][18] Several studies report that it can achieve an incremental oil recovery in the range of 5%-20% in the Bakken and Eagle ford reservoirs using the huff-n-puff gas process. [19][20][21][22][23] However, some studies also indicate that CO 2 injection does have several drawbacks, 24,25 including the rapid decline of oil production.…”

Section: Introductionmentioning

confidence: 99%

Investigation of CO₂/N₂ injection in tight oil reservoirs with confinement effect

Wang

et al. 2019

Energy Science & Engineering

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This paper investigates the CO2/N2 injection process in tight oil reservoirs considering the confinement effect. To study the microscopic physical mechanisms, the confinement effect is characterized by properties shift and capillarity and introduced into the flash calculation to obtain the phase equilibrium of mixture fluids (tight oil/CO2/N2) in tight porous media. The results indicate that the injected nitrogen gas could effectively maintain the reservoir pressure, while it also weakens the effects of the CO2 injection recovery mechanisms, notably diffusivity and viscosity reduction. In addition, a dual‐pore tight oil reservoir model is set up to investigate the CO2/N2 injection with ultra‐low permeability and hydraulic fracturing. The basic CO2 injection parameters are optimized by the orthogonal method. Based on CO2 injection process, three injection schemes of CO2/N2 injection, which are mixed‐gas injection, CO2‐alternating‐N2 (CAN) injection, and N2‐alternating‐CO2 (NAC) injection, were investigated and a comparative analysis was made for the pressure distribution, CO2 mole fraction distribution, and cumulative oil production. Based on this analysis, the CAN injection process proved to be the best injection scheme. A parametric analysis further suggested that the nitrogen gas injection rate was the most important factor. Besides, the effect of gravity drainage, reservoir permeability, nature fractures, and permeability heterogeneity on the oil production of CAN injection process were also investigated in detail. The results show that tight oil reservoir with better vertical connectivity, poor fracture growth, and higher heterogeneity is more favorable for the CO2/N2 injection process.

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“…In the issue of monitoring CO 2 migration in CO 2 -EOR, Ren et al (2016) used gas tracer testing to examine the inter-well connectivity [10]. Sevik et al (2015), Guney et al (2017), and Cetin et al (2013) demonstrated that the migration of CO 2 has great effect on human health and plants [11][12][13].…”

Section: Literature Reviewmentioning

confidence: 99%

Life Cycle CO2 Emission Estimation of CCS-EOR System Using Different CO2 Sources

Jiang¹,

Lei²,

Yang³

et al. 2018

Pol. J. Environ. Stud.

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Monitoring on CO2 migration in a tight oil reservoir during CCS-EOR in Jilin Oilfield China

Cited by 138 publications

References 25 publications

Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Investigation of CO₂/N₂ injection in tight oil reservoirs with confinement effect

Life Cycle CO2 Emission Estimation of CCS-EOR System Using Different CO2 Sources

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Monitoring on CO2 migration in a tight oil reservoir during CCS-EOR in Jilin Oilfield China

Cited by 138 publications

References 25 publications

Identification of potential CO2 leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Identification of potential CO2 leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Investigation of CO2/N2 injection in tight oil reservoirs with confinement effect

Life Cycle CO2 Emission Estimation of CCS-EOR System Using Different CO2 Sources

Contact Info

Product

Resources

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Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Identification of potential CO₂ leakage pathways and mechanisms in oil reservoirs using fault tree analysis

Investigation of CO₂/N₂ injection in tight oil reservoirs with confinement effect