УДК 622.245.422

STUDY OF REINFORCED EXPANDABLE CEMENT MATERIALS

Egorova E.V. – Candidate of Technical Sciences, Director of JV "Caspian Educational Center of Oil and Gas Technologies", Astrakhan State Technical University, egorova _ ev@list.ru

Minchenko Yu.S. – Candidate of Technical Sciences, Associate Professor of the department of development and operation of oil and gas fields, Astrakhan State Technical University, minchenko.yuliya@inbox.ru

Belozerov V.S. – Doctor of Geological Sciences, Director of the Institute of Geosciences of the North Caucasian Federal University, vbelozerov@ncfu.ru

Key words: cement slurry, cement stone, dispersed reinforcement, basalt fiber, polypropylene fiber, coefficient of linear expansion, crack resistance.

High quality of well casing will be ensured only with reliable contact of the cement stone with its limiting surfaces (casing and rock), therefore, the use of expanding plugging materials during cementing is generally accepted. At the same time, it is obvious that their application will not give positive results in intervals with a thick mud cake or in intervals of caverns, i.e. where the space for expansion is greater than the magnitude of the expansion itself. When the cement slurry hardens with a fibrous filler, a dispersed-reinforced cement stone is formed, which is characterized by increased strength and crack resistance. The article examines the influence of basalt and polypropylene fibers on the deformative properties of cement stone.