FLOW OF GAS-CONDENSATE SYSTEM IN A TIME-DEPENDENT DEFORMABLE RESERVOIR WITH ROCK CREEP EFFECT IN THE WELL BOTTOMHOLE ZONE

Document Type : Research Paper

Authors

1 Institute of Applied Mathematics, Baku State University, Baku, Azerbaijan.

2 SOCAR Oil Gas Scientific Research Project Institute, Baku, Azerbaijan.

3 Military Institute named after Heydar Aliyev, Baku, Azerbaijan.

Abstract

The problem of filtration of a gas-condensate system to a well-draining a time-dependent de-
formable formation is considered in the case when the laws of compressibility of reservoir rocks in the bot-
tomhole zone and in the part of the reservoir remote from the well are different. Using the idea of a binary
representation of a gas-condensate system, a semi-analytical solution to the considered problem is obtained,
an algorithm is proposed for calculating the main indicators of depletion of a gas-condensate reservoir, for the
case when near the well (inner zone) the formation undergoes creep, and in the distant part of the reservoir
(outer zone) elastic deformation occurs. Based on this algorithm, a computer simulator of the considered
process created.
The results of a study of the influence of the noted factor on the main indicators of the depletion process of
gas-condensate deposits represented by time-dependent (relaxing) reservoirs showed that taking into account
the rheological characteristics of the reservoir in the well bottom-hole zone significantly refines the forecasting
of the main development indicators. It has been established that when the creep effect of formation rocks
in the near-wellbore zone is taken into account, the maximum difference in the current values of formation
pressures reaches up to 12.53%. It corresponds to a gas recovery factor value of 0.55.

Keywords

Main Subjects

Computational Methods for Differential Equations

Articles in Press, Accepted Manuscript
Available Online from 28 October 2024

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History

  • Receive Date: 05 July 2024
  • Revise Date: 09 October 2024
  • Accept Date: 27 October 2024

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