«Oilfield engineering»

Determination of the drainage dynamic zone of a well and monitoring of the edge water activity in a volatile oil reservoir

UDC: 622.276.2.038
DOI: 10.33285/0207-2351-2022-7(643)-59-64

Authors:

¹ SOCAR "Oil Gas Scientific Research Project" Institute, Baku, Azerbaijan
² SOCAR, Baku, Azerbaijan

Keywords: volatile oil, edge water activity, well external boundary, drainage area, field data analysis, well-testing

Annotation:

The article proposes a method for interpreting the results of field studies in three steady-state modes to determine the dynamic radius of a well external boundary, draining a reservoir with volatile oil. The method takes into account the deformation properties of the reservoir and the thermodynamic properties of the hydrocarbon system. The results of testing carried out in the deformed and non-deformed reservoirs under a wide range of formation pressure changes showed that the proposed method has a satisfactory degree of reliability and accuracy. Well, application of the method on the example of PVT-data of the volatile oil of the "Russkiy Khutor" field (Russia) at various reservoir and bottomhole pressures revealed the fact that deviation of the calculated values of the reservoir radius from the actual values varied within 0,39...0,77 % in case of a non-deformable reservoir and 0,47...0,72 % in case of a deformable reservoir. For the well under consideration, a formula for monitoring the edge water activity was derived.

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