Stability of transverse vibration of drillstring conveying drilling fluid

Tang, Shengjian; Zheng, Liang; Zhao, Guanghui

doi:10.15632/jtam-pl/127391

Cited by 8 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the reservoir shale imbibes the fluid, the mechanical characteristics change of hydration is obvious, and microscopically, it promotes the generation, propagation, and connection of secondary microcracks. In terms of macroscopic mechanical properties, the strength of shale decreases, and the Young's modulus reduces [11] (Figure 4).…”

Section: Reservoir Shale Characteristics Marine Shale In Southmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Wellbore Stability considering the Interaction between Fluid and Shale

et al. 2023

View full text Add to dashboard Cite

Reservoir shale has the characteristics of bedding planes, strong anisotropy, and strong imbibition ability under ultralow water saturation, which has an important impact on wellbore stability of horizontal wells. Therefore, the physical and chemical properties of reservoir shale were analyzed, and a mechanics model of wellbore stability was established considering the elasticity and strength anisotropy. The wellbore stability was analyzed considering the anisotropy parameters of formation elasticity and strength and imbibition conditions. The results show that the anisotropy of elasticity and strength under the condition of imbibition are important parameters for evaluating the stability of reservoir shale borehole. Considering the interaction between fluid and reservoir shale, the weakening of the strength of the bedding structure is the reason for wellbore instability of reservoir shale. Bedding planes and microfractures provide rapid imbibition channel, and the imbibition volume increases, which further causes fracture expansion and strength weakening, and then leads to wellbore instability. Multistage effective plugging of bedding, microcracks and macroholes during drilling is the key to maintain the stability of shale wellbore.

show abstract

Section: Reservoir Shale Characteristics Marine Shale In Southmentioning

confidence: 99%

“…In situ stress coordinate transformation equation: Figure 4: Changes in elastic modulus before and after soaked in water [11]. 4 Geofluids…”

Section: Coordinate Transformation Of In Situ Stressmentioning

confidence: 99%

Analysis of Wellbore Stability considering the Interaction between Fluid and Shale

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The performance of the developed models was verified through comparisons with field test results of stick-slip vibration. Taking into account the fluid power of drilling mud, Tang et al [9] established the control equation of drill string vibration by using the micro element method, and studied the dynamic stability of the drill string system. It was found that the flow rate of drilling fluid would affect the stiffness and damping of the drill string system at the same time.…”

Section: Introductionmentioning

confidence: 99%

Effects of Drilling Fluid Rheology on Nonlinear ALTC Vibration Response Characteristic of Rotary Drill String

Liu

Chen

Liang

et al. 2022

Preprint

View full text Add to dashboard Cite

The drilling mud shows strong non-Newtonian rheology due to mixing a large number of cuttings at well bottom during drilling, which has great influences on the vibration behavior of the drill string. To investigate this phenomenon, an axial-lateral-torsion coupling (ALTC) nonlinear dynamic model based on Hamilton's principle was established, taking into account the effect of drilling fluid viscous damping, Herschel-Bulkley non-Newtonian rheological (HBNR) damping, bit-rock interaction and drillstring-borehole contact. In the model, a Rayleigh damping matrix calculation method was proposed to describe the influence of drilling fluid on the damping of ALTC vibration, and the Newmark-β method was used to solved the nonlinear discrete equations of the system. The validity of the model was verified through the simulation data and the field measurement data. Using the nonlinear model, the effect of drilling fluid rheology on ALTC vibration response of rotary drill string was investigated. It was found that compared with viscous damping, HBNR damping can significantly suppress the axial, lateral and torsional vibration of drill string, maintain the stability of wellbore diameter and improve ROP. Both damping models indicate that lateral vibration signals are difficult to transmit to the wellhead, while axial vibration and torsional vibration signals can be observed near the wellhead. The results can provide a theoretically guidance for suppressing the drill string vibration and reducing the risk of premature failure of drill string.

show abstract