Wettability, hysteresis and fracture–matrix interaction during CO2 EOR and storage in fractured carbonate reservoirs

Agada, Simeon Sani; Geiger, Sebastian; Doster, Florian

doi:10.1016/j.ijggc.2015.12.035

Cited by 46 publications

(32 citation statements)

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“…Carbonate reservoirs do not generally possess an impermeable boundary or caprock, and therefore permanent trapping of CO 2 through geomechanical means is unrealistic [57]. Solubility storage decreases potential leakage in carbonate formations, as the dissolution of CO 2 into water promotes mineralization, but this will need to be studied further before carbonate reservoirs can be relied upon to properly sequester large volumes of CO 2 [56].…”

Section: Overcoming the High Risk Of Co 2 Leakage In Carbonate Reservmentioning

confidence: 99%

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Moghanloo¹,

Yan²,

Law³

et al. 2017

Recent Advances in Carbon Capture and Storage

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In the near-and midterm future, carbon capture and storage (CCS), also called CO 2 geosequestration, is likely to play a significant role in the reduction of atmospheric greenhouse gas. By expanding the set of possible sequestration targets, it is expected that CCS will enable larger quantities of CO 2 to be sequestered, mitigating human activity-driven climate change. In general, oil and gas reservoirs are ideal geologic storage sites for CO 2 because they have successfully held hydrocarbon molecules for millions of years. In addition to the significant and reliable storage capacity of hydrocarbon reservoirs, there is a considerable body of knowledge related to the behavior of hydrocarbon bearing reservoirs, and significant amounts of data are often acquired during their exploitation, factors which improve the economics and safety of any CCS project. By making use of existing and future oil and gas projects, CCS can become a major contributor in the fight against global warming, as well as a sizeable contributor to energy production worldwide. The CCS sequestration targets discussed in this study are sandstones, coal beds, shales, and carbonates. The potential and challenges associated with each of them are discussed in detail, and suggested topics for future research work are provided.

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Section: Overcoming the High Risk Of Co 2 Leakage In Carbonate Reservmentioning

confidence: 99%

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Moghanloo¹,

Yan²,

Law³

et al. 2017

Recent Advances in Carbon Capture and Storage

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“…A variabilidade da estrutura da matriz e conectividade da rede de fraturas é a principal razão para que os reservatórios carbonáticos apresentem uma grande variação do comportamento de escoamento, levando a significativas incertezas na previsão da distribuição de CO 2 e recuperação de hidrocarbonetos. Demostrou--se que as propriedades da rede de fraturas têm o maior impacto nos resultados de simulações realizadas (Agada et al, 2016), mas que os efeitos da molhabilidade não são negligenciáveis.…”

Section: Heterogeneidade Do Reservatóriounclassified

“…Portando, uma razão de mobilidades M < 1 é considerada favorável, enquanto razões de mobilidades M > 1 são consideradas desfavoráveis (Rosa et al, 2006). Em paralelo, na injeção WAG--CO 2 , a retenção residual de CO 2 é mais significante em rochas molháveis por água, pois o fenômeno de partição do gás ocorre e o CO 2 se torna progressivamente desconectado nos poros da fase contínua de CO 2 (Agada et al, 2016). Devido à redução da mobilidade do CO 2 , a retenção residual leva a uma maior recuperação de óleo.…”

Section: Razão De Mobilidadeunclassified

“…Para cenários com molhabilidade mista, a injeção WAG iniciada por gás resulta em melhor recuperação do que a iniciada por água. Agada et al, (2016) explicam que sistemas com rocha molhada por água têm melhor recuperação do que sistemas molhados por óleo e misto, pois as formações molhadas por água possuem alto potencial de embebição. A retenção da fase não--molhada é mais significante nesses sistemas pois partição do gás ocorre e ele se torna progressivamente preso nos poros e desconectado da fase contínua de gás.…”

Section: Molhabilidadeunclassified

“…A técnica também tem sido considerada como uma alternativa para armazenamento de carbono (Agada, Geiger, & Doster, 2016).…”

Section: Introductionunclassified

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Injeção Alternada Água-Gás Co2: Influência De Características De Reservatório E De Parâmetros Operacionais

Formentin

Schiozer

Moreno

2017

HOLOS

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RESUMOInjeção alternada de água e gás (WAG) é proposta para melhorar a eficiência de varredura do óleo em relação à injeção contínua de gás ou água. Recentemente, a injeção WAG--CO 2 ganhou notoriedade por diversas razões, entre elas a possibilidade de (1) melhorar a recuperação do óleo por proporcionar uma condição próxima a de miscibilidade ou de miscibilidade no reservatório, (2) utilizar o gás CO 2 associado à produção de óleo para reinjeção, e (3) armazenar um gás de efeito estufa. O principal objetivo desde estudo é examinar a influência de características de reservatório e parâmetros operacionais no processo WAG--CO 2 a fim de introduzir a dinâmica desse processo no contexto dos desafios atuais. Doze tópicos principais foram analisados: seis características do reservatório, que possuem grau de incerteza relacionado com a maturidade do reservatório; e seis parâmetros operacionais, que são controlados pelos operadores. As pesquisas recentes mostram um melhor entendimento da distribuição e do comportamento dos fluidos em reservatório como o caso do fenômeno de histerese, entretanto, dados experimentais ainda são críticos para a modelagem direta do comportamento trifásico. Dentre os parâmetros operacionais, o controle sobre a pressão e sobre a formação de escala é fator crítico para a melhora da recuperação e para a manutenção da injetividade e da produtividade dos poços. Faixas usuais de aplicação para alguns parâmetros foram levantadas. Conclui--se com uma lista das principais referências recentes estudadas sobre o tema, que podem fundar estudos mais aprofundados sobre os temas específicos. PALAVRAS--CHAVE:Injeção Alternada Água -Gás CO 2 , Condições de Reservatório, Parâmetros Operacionais. WATER--ALTERNATING--GAS--CO 2 INJECTION: INFLUENCE OF RESERVOIR CHARACTERISTICS AND OPERATING PARAMETERS ABSTRACTWater--Alternating--Gas--CO 2 injection (WAG--CO 2 ) is a technique to improve the oil sweep efficiency compared to gas or water continuous injection. Recently, WAG--CO 2 injection gained notoriety for various reasons, including the possibility of (1) improving oil recovery by providing a condition of miscibility or close to miscibility in the reservoir; (2) using the CO 2 gas associated with the production oil for reinjection; and (3) storing a greenhouse gas. The main objective of this study is to examine the influence of reservoir characteristics and operational parameters in WAG--CO 2 process to introduce its dynamics in the context of the current challenges. Twelve main topics are analyzed: six characteristics of the reservoir, which have degrees of uncertainty related to the maturity of the reservoir; and six operational parameters, which are controlled by operators. Recent research shows a better understanding of the distribution and behavior of reservoir fluids as the case of hysteresis phenomenon. However, experimental data are also critical to the direct modeling of phase behavior. Among the operating parameters, control over the pressure and the formation of scale is critical for the improvement of...

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Assessment of CO₂ Storage Potential in Naturally Fractured Reservoirs With Dual‐Porosity Models

March

Doster

Geiger

2018

Water Resources Research

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Naturally Fractured Reservoirs (NFR's) have received little attention as potential CO2 storage sites. Two main facts deter from storage projects in fractured reservoirs: (1) CO2 tends to be nonwetting in target formations and capillary forces will keep CO2 in the fractures, which typically have low pore volume; and (2) the high conductivity of the fractures may lead to increased spatial spreading of the CO2 plume. Numerical simulations are a powerful tool to understand the physics behind brine‐CO2 flow in NFR's. Dual‐porosity models are typically used to simulate multiphase flow in fractured formations. However, existing dual‐porosity models are based on crude approximations of the matrix‐fracture fluid transfer processes and often fail to capture the dynamics of fluid exchange accurately. Therefore, more accurate transfer functions are needed in order to evaluate the CO2 transfer to the matrix. This work presents an assessment of CO2 storage potential in NFR's using dual‐porosity models. We investigate the impact of a system of fractures on storage in a saline aquifer, by analyzing the time scales of brine drainage by CO2 in the matrix blocks and the maximum CO2 that can be stored in the rock matrix. A new model to estimate drainage time scales is developed and used in a transfer function for dual‐porosity simulations. We then analyze how injection rates should be limited in order to avoid early spill of CO2 (lost control of the plume) on a conceptual anticline model. Numerical simulations on the anticline show that naturally fractured reservoirs may be used to store CO2.

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Wettability, hysteresis and fracture–matrix interaction during CO2 EOR and storage in fractured carbonate reservoirs

Cited by 46 publications

References 91 publications

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Injeção Alternada Água-Gás Co2: Influência De Características De Reservatório E De Parâmetros Operacionais

Assessment of CO₂ Storage Potential in Naturally Fractured Reservoirs With Dual‐Porosity Models

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Wettability, hysteresis and fracture–matrix interaction during CO2 EOR and storage in fractured carbonate reservoirs

Cited by 46 publications

References 91 publications

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Challenges Associated with CO2 Sequestration and Hydrocarbon Recovery

Injeção Alternada Água-Gás Co2: Influência De Características De Reservatório E De Parâmetros Operacionais

Assessment of CO2 Storage Potential in Naturally Fractured Reservoirs With Dual‐Porosity Models

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Product

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Assessment of CO₂ Storage Potential in Naturally Fractured Reservoirs With Dual‐Porosity Models