3D numerical modeling of the effect of the drill string vibration cyclic loads on the wellbore natural fracture growth

Lenwoue, Arnaud Regis Kamgue; Deng, Jingen; Feng, Yongcun; Li, Zhonghui; Oloruntoba, Adefarati; Li, H.; Selabi, Naomie Beolle Songwe; Micheal, Marembo

doi:10.1016/j.petrol.2021.109481

Cited by 5 publications

(1 citation statement)

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“…Heisig and Neubert 38 also analyzed the actual downhole vibration data and found that the phenomenon of drilling jumping and bit bouncing will be happened in the event of severe vibration. Kamgue Lenwoue et al 39 developed a 3D finite element model using poro-elastoplastic theory to investigate the effect of drill-string vibration cyclic load on the propagation of natural fractures on the wall of wellbore, the results indicated that there is a clear relationship between fracture diameter, leakage rate and drill-string vibration cyclic load. Rafezi and Hassani 40 developed a novel qualitative method based on extensive field studies to investigate the relations between drilling vibration as well as electric motor current signals and bit wear, introduced bit failure vibration frequencies, regardless of the geological conditions.…”

Section: Introductionmentioning

confidence: 99%

Influence of drill-string lateral collision on wellbore stability of a horizontal well

Huang

et al. 2022

Advances in Mechanical Engineering

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A finite element model of wellbore stability was proposed for a horizontal well, and drill-string friction and lateral collision in the process of rotary motion were taken into account. An unconfined compression test was used for model validation, the normalized yielded zone area (NYZA) was employed to analyze wellbore stability, and the influence of a lateral collision on wellbore stability was simulated. The results indicated that the stress-strain curve of numerical simulation consists with unconfined compression test, and the maximum relative error is <2.2%. The evolution of NYZA can be divided into three typical stages: stage I (static balance), stage II (dynamic growth), and stage III (dynamic balance). Both normal and shear stresses reach to the peak value in stage II, while they always fluctuate in a relatively small range in stage III, so that the wellbore stability mainly affected by the first collision of drill-string. Both lateral acceleration and friction effects have significant impact on wellbore stability. The initial collision position and the size of drilling tool have a certain influence on wellbore stability, while the revolving speed of drill-string almost has no impact. The present paper has guiding significance for wellbore collapse prevention and drilling parameter optimization.

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Section: Introductionmentioning

confidence: 99%