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The characteristics of unconventional tight oil reservoir and its modification technology and productivity prediction
Características de reservorios de petróleo compactos no convencionales y sus tecnologías de modificación y de predicción de productividad
DOI:
https://doi.org/10.15446/esrj.v24n4.91473Keywords:
tight reservoir, volume fractured horizontal well, productivity model, start-up pressure gradient, productivity characteristics (en)modelo de productividad, reservorio compacto, pozo horizontal fracturado, presión inicial de gradiente, características de productividad (es)
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The zonal productivity prediction model of volume fractured horizontal wells in tight reservoirs is established in this study based on the physical model of volume fractured horizontal wells to study the near-well seepage law of volume fractured horizontal wells in unconventional tight reservoirs. The conformal transformation and iteration method are used to solve the problem. Compared with Fan Zifei's and Ning Zhengfu's method, the optimization of fractured horizontal wells' production parameters is studied. The effects of starting pressure gradient and fracture cluster number on horizontal wells' productivity with volume fracturing are analyzed. Multivariate regression analysis is used to rank the importance of influencing factors. The results show that the starting pressure gradient has the most significant impact on capacity. The application example of volume fractured horizontal wells in Lucaogou tight reservoir shows that the zonal productivity model established in this study can be used to predict the initial productivity of volume fractured horizontal wells. Thus, through theoretical analysis and numerical simulation, the productivity prediction model of horizontal wells with volume fracturing has certain guiding significance for the effective development of tight reservoirs.
En este estudio se establece el modelo de predicción de la productividad zonal en los pozos horizontales fracturados en reservorios compactos con base en un modelo fìsico de pozos horizontales fracturados para estudiar el regimen de filtración en reservorios compactos no convencionales. Los autores utilizaron la transformación conforme y el método de reiteración para resolver el problema. Se estudió la optimización de los parámetros de producción en pozos horizontales fracturados en comparación con los métodos de Fan Zifei y de Ning Zhengfu. Además, se analizaron los efectos de la presión inicial de la inclinación y el complejo de fracturas en la productividad de los pozos horizontales con el índice de fracturamiento. El análisis de regresión multivariante se utilizó para clasificar la importancia de los factores influenciadores. Los resultados muestran que la presión inicial de la inclinación tiene el mayor impacto en la capacidad. El ejemplo de aplicación de pozos horizontales fracturados en el reservorio compacto de Lucaogou muestra que el modelo de productividad zonal que se estableció en este estudio puede usarse para predecir la productividad inicial en estos pozos. De este modo, a través del análisis teórico y la simulación numérica, el modelo de predicción de productividad de pozos horizontales fracturados tiene una significancia para el desarrollo efectivo de reservorios compactos.
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1. Yuan Zhang, Jianyang Chen, Zhongbao Wu, Yuxiang Xiao, Ziyi Xu, Hanlie Cheng, Bin Zhang. (2024). Effect Evaluation of Staged Fracturing and Productivity Prediction of Horizontal Wells in Tight Reservoirs. Energies, 17(12), p.2894. https://doi.org/10.3390/en17122894.
2. Xinyu Zhao, Mofeng Li, Kai Yan, Li Yin. (2023). Revolutionizing Tight Reservoir Production: A Novel Dual-Medium Unsteady Seepage Model for Optimizing Volumetrically Fractured Horizontal Wells. Energy Engineering, 120(12), p.2933. https://doi.org/10.32604/ee.2023.041580.
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