Geological-mechanical modeling and analysis of the inhomogeneous stress field when opening the reservoir by cumulative perforation
UDC: 622.276.1/.4.001.57:622.244.5
DOI: 10.33285/2413-5011-2022-11(371)-35-41
Authors:
POPOV SERGEY N.
1,
CHERNYSHOV SERGEY E.2,
KRIVOSHCHEKOV SERGEY N.2
1 Oil and Gas Research Institute Russian Academy of Sciences (OGRI RAS), Moscow, Russia
2 Perm National Research Polytechnic University, Perm, Russia
Keywords: cumulative perforation, limestone reservoir, near-wellbore zone, stress-strain state, effective stress, destruction zone
Annotation:
A numerical finite element model of the near-wellbore zone has been developed considering the geometric parameters of cumulative perforation holes. Multivariate calculations of an inhomogeneous stress field were carried out for the conditions of Tournaisian-Famennian limestone reservoirs in the south of the Perm Region after creation of perforation channels when creating various pressure drawdowns. The stress state of the reservoir near the well was analyzed and the sites of decrease and increase of the average effective stresses near the perforation openings were identified. Based on the Mohr – Coulomb criterion, the conditions of the destruction zones occurrence near the perforation interval are determined.
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