In-depth isolation of highly permeable zones for reservoir conformance control

Abstract

In-depth isolation of flooded-out reservoir zones is widely used in water injection and water production control in oilfields. This paper looks at the research results of a new technological solution – a method and mechanism of deep-penetrating insulation of highly permeable reservoir areas. Approximate mathematical models are used to describe oil-saturated reservoirs flooding with chemical compositions used as a displaced fluid. The mathematical model of the problem is reduced to a partial differential equation with initial boundary conditions. The article also presents the results of the numerical implementation of the transfer equations of concentrations of gel-forming components and a thickener. In a non-uniform grid domain, the problem at hand is replaced by a discrete problem using a combination of an explicit and implicit-difference scheme that increases the order of accuracy and is solved by the run-through method. Effective algorithms for solving the one-dimensional problem are obtained, taking into account the equations of adsorption and convective diffusion. The developed method increases the efficiency of the in-deep isolation treatment of flushed zones and can be applied to related reservoir flooding projects.

Graphical Abstract

Keywords:

• Isolation
• cross linking
• diffusion
• adsorption
• autohesion

Disclosure statement

The authors declare no competing financial interest regarding the publication of this paper.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.