Fracture propagation in an initially stressed anisotropic reservoir under shear: Reorientation and fluid lag

Garagash, I.A.; Osiptsov, A.A.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 февраля 2021 г.

Авторы: Garagash I.A., Osiptsov A.A.
Журнал: Engineering Fracture Mechanics
Том: 242
Номер: 1
Год издания: 2021
Издательство: Pergamon Press Ltd.
Местоположение издательства: United Kingdom
Номер статьи: 107457
DOI: 10.1016/j.engfracmech.2020.107457
Аннотация: We study the propagation of a fracture in an initially stressed anisotropic reservoir under shear.The focus is made on the deviation of the fracture from the principal direction due to the shearingconditions. An asymptotic model is developed, which yields the solution in terms of the effectiveK2c and the deviation angle. Then, we analyse formation of the fluid lag during propagation of ahydraulic fracture in the cases of plane and radial fracture. It is shown that there is lag betweenthe fluid and the fract ure tip, which may be as large as half of the fracture at early stages offracture propagation and its actual length is highly dependent on the compressibility of thereservoir rock, tectonic strength and leak-off conditions at the fracture face. In this case the speedof the fracture tip exceeds that of the fluid and is related to the length of the lag. The influence ofthe fluid front structure on the law of fracture propagation is studied. It is revealed that themagnitude of pressure gradient and its distribution along the fracture have a significant impact onthe lag size.
Добавил в систему: Гарагаш Игорь Александрович

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Fracture propagation in an initially stressed anisotropic reservoir under shear: Reorientation and fluid lagстатья

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