Improved performance of casing perforation through application of reactive elements

UDK: 622.245.142

DOI: 10.24887/0028-2448-2025-7-13-17

Key words: well logging and well intervention, perforated casing completion, perforation, penetration depth, reactive elements, cement sheath, energy-saturated material

Authors: E.R. Asadullin TatNIPIneft, RF, Almetyevsk); А.V. Larionov TatNIPIneft, RF, Almetyevsk); А.А. Marsov (Kazan National Research University of Technology, RF, Kazan); А.А. Mokeev (Kazan National Research University of Technology, RF, Kazan); R.G. Shaidullin (TATNEFT PJSC, RF, Almetyevsk)

The problem of casing perforation during hydrocarbon production using shaped-charge perforating guns is associated with a number of process and geological challenges. The major disadvantage of typical shaped charges includes compaction of the rock surrounding the perforation channel. The paper describes an improved casing perforation method due to larger flow area. This method entails application of a reactive element (RE) fitted in front of the shaped charge and made up of solid fuel (energy-saturated material) which, upon detonation, releases high-temperature acids (hydrochloric and hydrofluoric) acting on the walls of the perforation channel to increase its permeability. The RE is designed with an axial channel and a conical cavity, which enables the shaped charge jet to form without any contact with the RE. The composition is based on ammonium perchlorate (AP), a strong oxidizer that releases hydrogen chloride (HCl) upon decomposition. To increase the acidity, chlorine- and fluorine-containing components. According to experimental data, the perforation channels formed by shaped charges loaded with RE exhibit larger dimensions and rock decompaction zone to improve the fluid flow. Test results confirmed the efficiency of the proposed solution: channels with RE have larger dimensions and improved flow performance. Thus, the combination of RE with shaped charges ensures increased well productivity due to improved permeability in the bottomhole zone and minimizes the need for post-treatments.

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