EVALUATION OF ELASTIC-STRENGTH PROPERTIES OF CEMENT-EPOXY SYSTEMS

Abstract

The relevance of the study is determined by the conditions of operation and completion of wells in modern conditions. In the process of well construction, the plugging material used to fasten casing strings experiences dynamic loads, as a result of which it loses its integrity, which leads to leakage of the annulus and subsequent crossflows of formation fluids. Dynamic loads include the dynamics of the drilling tool during normalization, operations for secondary opening, hydraulic fracturing, casing pressure testing after the waiting period for the cement stone to harden. The elastic properties of cement stone from various compositions were determined using ultrasonic evaluation methods, the strength properties were determined by destructive testing methods according to API 10B-2 / ISO 10426-2 standards. There are a number of works and industry solutions of well cementing contractors related to the creation of elastic cement systems, however, in many respects, these developments do not fully solve the identified problems and are dependent on imported components. The main aim: development of the composition of a cement slurry with increased elastic-strength properties from Russian components. Object: cement stone and its elastic-strength properties. Results. In the course of experimental studies, an increase in the bending strength and improvement in the elastic properties of cement-epoxy stone are noted when using epoxy resin as part of the cement system, the distribution of the resin in the composition of the cement stone using 3D X-ray scanning methods is determined, the advantages and disadvantages of additives-elasticizers are noted, concentrations of additives that improve the technological properties of cement mortar and stone are selected.

Keywords

• cement stone
• young's modulus
• poisson's ratio
• ultrasound
• compressive strength
• flexural strength
• permeability
• elastic cements
• elasticizers