Effect of Pulsed Jet on Pore Pressure of Deep Formation Rock | Zendy

Yong Wang | Zendy; Hongjian Ni | Zendy; Ruihe Wang | Zendy; Lei Peng | Zendy; Bin Huang | Zendy; Shubin Liu | Zendy; Ning Li | Zendy

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Effect of Pulsed Jet on Pore Pressure of Deep Formation Rock

Author(s) -

Yong Wang,

Hongjian Ni,

Ruihe Wang,

Lei Peng,

Bin Huang,

Shubin Liu,

Ning Li

Publication year - 2021

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2021/2217787

Subject(s) - jet (fluid) , borehole , pulse (music) , amplitude , pulse pressure , pore water pressure , materials science , mechanics , geology , chemistry , optics , geotechnical engineering , physics , medicine , detector , blood pressure , radiology

Pulsed jet significantly affects the pore pressure of deep formation and then affects the mechanical ROP. In this paper, the effect of jet pulsation on deep pore pressure in the formation is studied by the finite element method. Under the pulsed jet, the maximum relative negative pressure is along the wellbore axis, and the farther it is to the borehole axis, the smaller the relative negative pressure is. With the increase of pulse frequency, the relative negative pressure increases and the maximum point of relative negative pressure moves upward. The optimum pulse frequency is from 50 Hz to 500 Hz. There is a linear relationship between pulse amplitude and relative negative pressure.

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