Production_from_Naturally_Fractured_Rese.docx - Production...

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Production from Naturally Fractured Reservoirs Fractured reservoirs are reservoirs that have macroscopic planar discontinuity due to the rock deformation or physical diagenesis (Izuwa, et al. 2015). A fractured reservoir is called naturally fractured when the fracture distribution has a substantial influence on the fluid flow. According to Spence, et al. (2014), the distribution of fracture in naturally fractured reservoirs is known as “fracture stratigraphy or fracture network”. A naturally fractured reservoir is divided into two parts namely the matrix and the fracture. The matrix is more porous with a lower permeability, and it serves as the storage part of the reservoir. The fractured part is highly permeable and less porous compared to the matrix. The fractured part of the reservoir mostly controls the fluid flow during production. Unlike conventional reservoirs where the production behavior can be easily predicted, production from naturally fractured reservoirs is not easy because the matrix and fractured parts of the producing reservoirs have different properties (porosity, permeability, and fluid saturation). There are constraints faced while producing naturally fractured reservoirs because it is not easy to develop the flow model of those reservoirs. Some of the constraints faced while producing oil and gas from naturally fractured reservoirs are centered on obtaining the information needed to characterize the reservoirs. According to Aguilera(2003), the information needed to characterize naturally fractured reservoir relies on both direct and indirect source. Direct sources are very important because it provides more information about the fracture in the reservoir. Coring is one of the direct sources of information, and it plays a huge role in studying the matrix and fracture distribution. Although the information about the fracture can be obtained from drilling cuttings, coring is the most reliable source of information because in some reservoirs drilling cuttings can show no sign of 1
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fracture while the reservoir is fractured. Indirect sources include production history, seismic information, as well as well testing. Both direct and indirect sources of information play a huge
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