A NEW AND PRACTICAL METHOD FOR ZONE SELECTION IN HYDRAULIC FRACTURING OPERATION: A CASE STUDY IN SIRRI-A RESERVOIR

Javad Barat, Mohammad Ghafoori, Khalil Shahbazi, Gholamreza Ferdowsi

Resumen


Hydraulic fracturing creates a high conductivity channel within a large area of formation and bypasses any damage that may exist in the near wellbore region. Moreover, it has been one of the major well stimulation techniques to increase well production. Accurate knowledge of parameters affecting fracture initiation pressure provides essential information to assess the identification of fracture initiation zones and hydraulic fracture strategies as well as completion design requirements. In order to study the feasibility of implementing this method, Sirii-A reservoir is selected and an extensive literature survey was carried out. Geomechanical model factors are calculated by poroelastic methods and normal stress regime (σν > σH > σh) is diagnosed for the reservoir rock. Based on the crucial factors such as in situ stress, porosity, water saturation and uniaxial compressive strength, best layers for hydraulic fracturing operation are selected and their fracture pressures are estimated. A simulation of hydraulic fracturing job in these zones and comparison of the results by predicting the production and investigating Net Present Value (NPV) for these cases is carried out. Using the results we decide which one of these candidates is the best case for a hydraulic fracturing operation.


Palabras clave


Hydraulic fracturing; geomechanical; petrophysics; zone; formation

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Referencias


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