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Reservoir Fluids Evaluation of Cretaceous Succession in the Bijeel-7 Well, Aqra Area, Iraqi-Kurdistan Region: Revealed by Gas Chromatography Logs Data
Evaluación de fluidos de reservorio en la sucesión cretácica del pozo Bijeel-7, área de Aqra, región del Kurdistán iraquí, a través de datos de registros cromatográficos de gases
DOI:
https://doi.org/10.15446/esrj.v29n4.120653Keywords:
Chromatographic Gas Ratio, Reservoir Fluid Evaluation, Bijell-7 (Sharafuna-1),, Aqra- Iraqi-Kurdistan Region. (en)Relación cromatográfica de gases, evaluación de fluidos de reservorio, Bijeel-7 (Sharafuna-1), Aqra - Región del Kurdistán iraquí (es)
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This study evaluates the hydrocarbon potential of the Cretaceous succession in the Bijeel-7 (Sharafuna-1) Well, located in the Aqra area of Iraqi Kurdistan, through gas chromatographic analysis of hydrocarbons (C1–C5). The analysis focused on calculating key ratios for wetness (Wh), balance (Bh), and character (Ch) to identify hydrocarbon phases within the Shiranish, Aqra, Bekhme, Qamchuqa, Sarmord, and Chia Gara formations. The results revealed that the Shiranish Formation predominantly contains residual oil in its upper intervals and oil in its lower sections. The Aqra and Bekhme formations exhibited a mix of residual oil and oil-dominated intervals, with occasional gas or gas/oil phases identified in specific depths of the Bekhme Formation. The Qamchuqa Formation is primarily residual oil-dominated, with a transition to dry gas observed in its lower intervals. The Sarmord and Chia Gara formations showed a mixture of residual oil and oil phases, with a clear shift to oil dominance in their deeper sections. These findings provide valuable insights into the hydrocarbon potential and phase distributions across the studied formations, contributing to a better understanding of the petroleum system in the region. The present investigation can offer preliminary indications regarding the existence of hydrocarbons. This lowers the possibility of drilling dry Wells and aids in locating possible productive zones.
Este estudio evalúa el potencial de hidrocarburos de la sucesión Cretácica en el pozo Bijeel-7 (Sharafuna-1), ubicado en la zona de Aqra, Kurdistán iraquí, mediante análisis cromatográfico de gases de hidrocarburos (C1–C5). El análisis se centró en el cálculo de relaciones clave de humedad (Wh), balance (Bh) y carácter (Ch) para identificar las fases de hidrocarburos dentro de las formaciones Shiranish, Aqra, Bekhme, Qamchuqa, Sarmord y Chia Gara. Los resultados revelaron que la Formación Shiranish contiene predominantemente aceite residual en sus intervalos superiores y aceite en sus secciones inferiores. Las formaciones Aqra y Bekhme mostraron una mezcla de intervalos dominados por aceite residual y aceite, con fases ocasionales de gas o gas/aceite identificadas en ciertas profundidades de la Formación Bekhme. La Formación Qamchuqa está principalmente dominada por aceite residual, con una transición hacia gas seco observada en sus intervalos inferiores. Las formaciones Sarmord y Chia Gara presentaron una mezcla de fases de aceite residual y aceite, con un claro cambio hacia el dominio del aceite en sus secciones más profundas. Estos hallazgos proporcionan información valiosa sobre el potencial de hidrocarburos y la distribución de fases en las formaciones estudiadas, contribuyendo a una mejor comprensión del sistema petrolero en la región. La presente investigación puede ofrecer indicaciones preliminares respecto a la existencia de hidrocarburos, lo que reduce la posibilidad de perforar pozos secos y ayuda en la localización de posibles zonas productivas.
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