Justification of the wells production conditions of the Cenomanian gas reservoir of the Kharampurskoye field based on the results of geomechanical modeling

DOI 10.24412/2076-6785-2021-2-41-46

Abstract
The risk assessment of sand production in the wells was carried out based on the results of a core study and hydro-geomechanical modeling of the formation. The paper presents and implements an algorithm for calculating the project indicators for the development of the Kharampurskoye oil and gas condensate field using combined hydro-geomechanical modeling, which makes it possible to take into account changes in reservoir properties and elastic-strength properties in deformed and bottomhole formation zones. Based on the results of the calculations, the risk of sand production and the collapse of the bottomhole formation zone was predicted throughout the development of the field. Recommendations were given to minimize the risks of sand production.

Materials and methods
Based on the results of laboratory studies, an assessment of the change in the elastic-strength properties of core samples when saturated with various fluids (natural saturation and water) was carried out. Based on the results of core testing on thick-walled cylinders, an estimate of the permissible depression was obtained. 3D/4D coupled hydrogeomechanical modeling was performed to assess the geomechanical effects associated with the change in the elastic-strength properties of rocks from saturation, which allows taking into account the effect of rock destruction on permeability.

Keywords
laboratory core studies, elastic-strength properties, different saturation,
depression assessment, associated hydro-geomechanical modelingс