Characterization of mineral-formation water interactions in Carboniferous sandstones and shales of the Illinois sedimentary basin

1980 ◽  
Vol 280 (7) ◽  
pp. 607-630 ◽  
Author(s):  
H. W. Nesbitt
1968 ◽  
Vol 5 (3) ◽  
pp. 523-543 ◽  
Author(s):  
R. O. van Everdingen

The existence of major flow systems in the Western Sedimentary Basin of Canada is reflected in the chemical composition and degree of concentration of the formation waters involved. Subsurface salt solution and collapse, and accumulation and destruction of hydrocarbon 'deposits' are directly related to such flow systems. Many occurrences of 'anomalies' in pressure, chemical composition, and concentration may be explained on the basis of membrane behavior of shales. The presence of organic matter may have an important influence on the composition of the formation waters. More sophisticated sampling techniques combined with more detailed analysis of formation waters are needed to develop the full potential benefit of formation-water studies for the petroleum industry.


2017 ◽  
Vol 18 (3.1) ◽  
pp. 123-131
Author(s):  
U.I. Arutunov ◽  
A.O. Efremov ◽  
L.A. Onuchak ◽  
V.S. Dudikov

The paper presents the experimental research of distribution of nine С1–С5 aliphatic monoatomic alcohols of normal and isomeric structure in a two-phased heterogenous system ”formation water–n-dodecane” using gas-chromatography method for the purpose of a choice of the most effective tracers for the characterization of filtrational streams and oil saturation when waterflooding. There were defined distribution constants K_с in interval of temperatures 25–75С on which basis appeared the conclusion that alcohols С1–С3 can be used as water (non-partitioning) tracers whereas alcohols С4–С5 approach for a role of partitioning tracers.


2014 ◽  
Vol 32 (3) ◽  
pp. 531
Author(s):  
Danilo R. Sá Teles ◽  
Antônio Expedito G. de Azevedo ◽  
Alexandre B. Costa ◽  
Maria R. Zucchi ◽  
Alexandre A. Ferreira

ABSTRACT. This paper presents a study of the physicochemical and isotopic characteristics of formation waters from the Castanhal, Siririzinho and Aguilhadafields in the Sergipe Basin, northeastern Brazil. In each of the samples, pH, conductivity, concentration of dissolved inorganic carbon (DIC), δ18O, δ2H, and δ13C weremeasured. These measurements are used to identify isotopic similarities among waters from local aquifers, which can be used as a proxy for groundwater connectivitywith formation water. Formation waters from the Castanhal and Siririzinho fields are enriched in deuterium, as evidenced by their δ2H values above the Global MeteoricWater Line (GMWL), which may be a result of significant isotopic exchange between water and H2S. These measurements are in accordance with the large enrichment in13C of DIC resulting from biodegradation, with the formation of methane depleted in 13C and CO2 enriched in 13C. These results indicate interaction between formationwater with rocks and other fluids.Keywords: stable isotopes, dissolved inorganic carbon, biodegradation. RESUMO. Este trabalho apresenta um estudo das características físico-químicas e isotópicas de águas de formação dos campos Castanhal, Siririzinho e Aguilhada, localizados na Bacia de Sergipe, nordeste do Brasil. Em cada uma das amostras foram medidos os parâmetros pH, condutividade elétrica, concentração de carbonoinorgânico dissolvido (CID), δ18O, δ2H e δ13C. A partir dos resultados obtidos, foi possível identificar a similaridade isotópica com as águas de aquíferos locais,indicando conexão de água subterrânea com água de formação. As águas de formação dos campos Castanhal e Siririzinho apresentaram um enriquecimento em deutério,resultado da troca isotópica entre a água e o H2S. Também foi verificado, um grande enriquecimento no δ13C do CID, resultado dos processos de biodegradação coma formação de metano empobrecido em 13C e CO2 enriquecido neste isótopo. Os resultados encontrados indicam interação entre a água de formação com as rochas ecom outros fluidos.Palavras-chave: isótopos estáveis, carbono inorgânico dissolvido, biodegradação.


2016 ◽  
Vol 110 ◽  
pp. 123-133 ◽  
Author(s):  
Shaoqiang Guo ◽  
Lining Xu ◽  
Lei Zhang ◽  
Wei Chang ◽  
Minxu Lu

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