期刊
RHEOLOGICA ACTA
卷 54, 期 6, 页码 479-499出版社
SPRINGER
DOI: 10.1007/s00397-015-0835-1
关键词
Flow curve; Thixotropy; Rheometry; Yield stress
类别
资金
- CNPq (Conselho Nacional de Pesquisa e Desenvolvimento)
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior)
- ANP (Agencia Nacional de Petroleo)
- PETROBRAS
The yielding behavior of waxy crude oils below the gelation temperature is a fundamental aspect for the production in oil basins located in deep water. Under this state, the material exhibits a diversity of complex non-Newtonian features turning the determination of its rheology a challenging task. We performed different tests monitoring the critical stress and strain where a major rupture occurs. We could infer from these experiments a minimum critical stress value that can be associated to the static yield stress of the material. In addition, the material exhibited a remarkably constant critical strain value, turning this last parameter into a more representative fingerprint of the material.
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