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Developing hardenable foam compositions for well tamping

Abstract

The aim of the work is to study the parameters of hardenable gas-liquid mixtures that can eliminate geological complications in well drilling, i.e. prevent and eliminate absorption, maintain the interval stability of loose rocks, and ensure trouble-free permafrost drilling-in. The study has been conducted for resins based on aggregate shale phenols, expanding mixtures based on phenol-formaldehyde FRV-1A resin and VAG-3 curing agent, and foams based on M-19-62 resin. The following properties of the foam compositions have been studied: viscosity, curing time, filterability, strength and its change over time, adhesion with the rock and metal casing surfaces, setting time, change in the mixture volume after polymerization, viscosity and elastic properties. The research methods include laboratory experiments and field tests at running wells. The study has shown an increase in the tamping quality, i.e. prevention of the gas-liquid mixture early curing and the power intensity reduction when injecting and forcing. A scheme of troublesome zones tamping with foam plastics has been developed. Based on the results of the study, the compositions of hardenable gas-liquid mixtures and their technological parameters have been developed for different geological-and-technical well-drilling conditions. The conclusion is that the developed hardenable gas-liquid compounds ensure higher performance of the drilling process and lower costs of the well construction.

About the Author

V. G. Zalivin
Irkutsk National Research Technical University
Russian Federation

Cand. Sci. (Eng.), Associate Professor, Oil and Gas Department, Institute of Subsoil Use

83, Lermontov St., Irkutsk, 664074, Russia



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Review

For citations:


Zalivin V.G. Developing hardenable foam compositions for well tamping. Earth sciences and subsoil use. 2019;42(3):336-348. (In Russ.)

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ISSN 2686-9993 (Print)
ISSN 2686-7931 (Online)