In-well vibration effect on cement stone impermeability

Abstract

Impermeability tests are carried out on cement stone under the influence of operating downhole vibration exciter. It is found that cement stone preserves its porofractured structure under the static force impact. Under the local vibration effects within 10 h, a the initial structure of microfractures becomes dynamic but the relative reduction in the proof-test pressure increases 2–3 times. The ingress of water is absent in cement stone, which means the absence of risk of behind-the-casing flow of fluid and water under the action of in-well vibrations.