Abstract
Tight oil has become a new growth point for global oil and gas reserves and production. Conventional tight oil reservoirs are mainly developed in depletion mode, and water flooding cannot effectively supplement formation energy. CO2 has strong advantages in terms of elasticity, mutual solubility with crude oil, etc., and is considered to be an effective way to supplement energy. At present, staged fracturing of horizontal wells has gradually become the main development method for tight oil reservoirs, but it still fails to meet production requirements. In this paper, taking the Chang 8 tight oil reservoir in the Ordos Basin as an example, it is the first time to use a combination of physical simulation and numerical simulation, and use an original large-scale physical simulation experiment system to focus on the impact of fractures on the CO2 huff-n-puff effect of staged fractured horizontal wells in tight oil reservoirs. Through the original large-scale physical simulation experiment system (which can simulate a 50 * 50 * 6 cm core), using a combination of physical simulation and numerical simulation to analyze the impact of fractures on the CO2 huff-n-puff effect of horizontal wells with staged fracturing. Studies have shown that fracture length and fracture density are the main controlling factors that affect the CO2 huff-n-puff effect of staged fracturing horizontal wells, and reasonable fracture parameters are the key to improving development efficiency.
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Zhou, T. et al. (2022). Influence of Fractures on CO2 Huff-n-Puff Effect of Staged Fractured Horizontal Wells in Tight Oil Reservoirs. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2021. IFEDC 2021. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2149-0_291
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DOI: https://doi.org/10.1007/978-981-19-2149-0_291
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