Experimental Studies of Water Injection Process into Sandstone Reservoir Rock Sample with an Emphasis on Created Fracture Effect on Formation Damage

Document Type : Research Paper

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Abstract

Water injection process has inevitably been scaling process associated. One of the important discussions in this field is to evaluate formation damage. In the current paper, the effect of some parameters on permeability reduction is investigated. In this study, the fracture effect on formation damage in reservoir rock is studied using a physical model. In addition, injection rate and pressure effects are considered in the physical model. Rock structure and heterogeneity restrict investigating formation damage phenomena. We selected some core samples in one of the oil fields injecting water in aquifer for the simulation of the physical model in laboratory. We tried to perform different scenarios using injected water sample in core flooding process. Although, permeability reduction is observed in no fractured samples, injection pressure increasing is not concluded in injection process in the fractured sample. On the other hand, fracture creation in samples, especially the sandstone sample with weak cementation, can be cause of particle movement or formation damage transfer through reservoir (far from injection well). This subject create problems later after injection especially in production wells where they depend on more parameters e.g. rock structure, texture, pore and particle size distribution, and reservoir heterogeneity.
 

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References

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Journal of Petroleum Research
Volume 24, Issue 80 - Serial Number 80
March and April 2015
Pages 41-53

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