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WELL TESTING INTERPRETATION AND EVALUATION OF PSEUDOSKINS FOR WELLS LOCATED IN THE HAOUD BERKAOUI FIELD, ALGERIA

Khaled Benyounes, Feriel Ouali, Djemaa MiloudiI, Kheira Gharbi

Abstract

The interpretation of well tests is a tool for the detection of well and reservoir problems, which based on the determination of several parameters such as permeability, skin, average reservoir pressure, flow capacity (kh ), effective length, boundary reservoir, and type of wellbore storage, etc. The knowledge of these parameters will allow us to make the production forecast and the resolution of production problems. For this, We have chosen six production wells located in the Haoud Berkaoui oil field, the interpretation of well tests was done by the use of software based on modern methodology of well testing. Skin factors measured during well tests can be caused by several parameters. In this work, the effects of pseudo skins such as, perforations, damage, deviation and partial perforations, multiphase, multilayer, injection and fissure are considered for each well. The study of skins and pseudo-skins allowed us to have the state of reservoir and wells. The obtained results concerning the skin and the various pseudo-skins show that the damage skin is the major component of the total skin values in comparison to other pseudo-skins. We note that the perforation skin is negative, this indicates that the perforation improve the production of wells. For all studied wells the partial penetration skin is positive, this confirms that the perforated part has an impact on the production. Given that the majority of wells are affected by a positive damage skin, these wells require stimulation

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DOI resolver: doi.org/10.5593/sgem2017/14/s06.126

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