Neftyanaya Provintsiya
electronic peer-reviewed scholarly publication
Neftyanaya provintsiya No.3(31),2022

Testing of diverting agents based on solid dispersion systems aimed at leakage reduction, fracture and cavern plugging during matrix acidizing and acid fracturing

R.R. Zakirov, R.L. Budkevich, G.R. Yusupova, A.A. Garipova


Acid treatment is one of the simplest and most common chemical methods for stimulating of production, rejuvenation of productivity of producer wells and injection capacity of wells. Despite the simplicity of the method, it is worth taking seriously the planning and conduct of acid treatments. [1]
In the process of bottomhole treatment and acid fracturing with hydrochloric acid, maximum effect on the rock occurs in the near-wellbore zone. In the remote zone of the formation, the reaction of the acid with the rock is less intense due to the loss of part of its activity. As a result, the effectiveness of hydrochloric acid treatments decreases rapidly with the growth of repeated treatments carried out on one well. Hence, the need for inhibition of the chemical interaction between acid and rock is obvious. For this, in practice, are widely used flow deviation systems. [2]
Flow deviation systems are usually used in acid fracturing operations and bottom-hole formation zone treatment to create a more uniform impact and deepen the penetration of acid.
Diverting agents can be divided into mechanical, solid and liquid (chemical). Mechanical methods are considered to be the most effective and guaranteed methods of directional acidizing. From this point of view, chemical methods are universal and, in fact, the only ones capable of regulating the processes occurring in the bottom - hole formation zone (acid emulsions, acid foam treatments, etc.). Flow deviation technologies with solid particles are based on the injection of limited volumes of organic polymer fibers into injection wells, designed to reduce the permeability of high-permeability layers of the formation, in order to equalize the injectivity of the well along the section of the formation. [1]
This article presents the results of testing diverting agents based on solid fine-dispersed systems of 4 companies, designed to reduce leaks, plugging natural fractures, caverns during bottomhole treatment, acid fracturing for use in the wells of PJSC TATNEFT.

Key words:

fibers, flow deviation systems, bottomhole treatment, acid fracturing, destruction, filtration


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R.R. Zakirov, Graduate Student, Engineer, Almetyevsk State Oil Institute
2, Lenin st., Almetyevsk, 423450, Russian Federation

R.L. Budkevich, PhD, Head of Laboratory, Almetyevsk State Oil Institute
2, Lenin st., Almetyevsk, 423450, Russian Federation

G.R. Yusupova, Senior Engineer, Almetyevsk State Oil Institute
2, Lenin st., Almetyevsk, 423450, Russian Federation

A.A. Garipova, Engineer, Almetyevsk State Oil Institute
2, Lenin st., Almetyevsk, 423450, Russian Federation

For citation:

R.R. Zakirov, R.L.Budkevich, G.R.Iusupova, A.A.Garipova Testirovaniye otkloniteley na osnove tverdykh melkodispersnykh sistem, prednaznachennykh dlya uluchsheniya sostoyaniya ute-chek, zakuporivaniya krupnykh treshchin, zasoreniya pri proverke kislotnykh OPZ, KGRP [Testing of diverting agents based on solid fine-dispersed systems designed to reduce leaks, plugging natural fractures, caverns during acid bottom hole formation zone treatment, acid fracturing]. Neftyanaya Provintsiya, No. 3(31), 2022. pp. 119-128. DOI EDN GVPQAZ (in Russian)

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