Analysis of wellbore instability in vertical, directional, and horizontal wells using field data

Mohiuddin, Mohammad; Khan, Khaleel Ur Rahman; Abdulraheem, Abdulazeez; Al-Majed, Abdulaziz; Awal, M.R.

doi:10.1016/j.petrol.2006.04.021

Cited by 79 publications

(35 citation statements)

References 6 publications

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“…The diffusion of water into shale results in swelling, delaminating, and fracturing (van Oort 1994). Otherwise, horizontal drilling requires drilling fluids with better performance to achieve wellbore stability due to the long period of interaction of waterbased drilling fluids with shale formations (Mohiuddin et al 2007). Inhibitors are commonly used in drilling fluids to prevent clay swelling.…”

Section: Introductionmentioning

confidence: 99%

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Weijia

et al. 2018

Pet. Sci.

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Graphene oxide (GO) nano-sheets were synthesized using a modified Hummers' method from graphite powder. The Raman spectrum of GO displayed a D-band at 1359 cm -1 and a G-band at 1594 cm -1 . The I D /I G value of GO was calculated to be 0.97, suggesting the formation of new sp 2 clusters upon reduction. A method was designed to investigate the assembly of the GO/montmorillonite (MMT) composite. After the addition of GO, the typical peaks of montmorillonite in FT-IR spectra shifted, indicating the assembly between GO and MMT. The D-band and G-band reduced sharply in the GO/MMT composite. More importantly, the D-band (1344 cm -1 ) and G-band (1574 cm -1 ) shifted significantly and the I D / I G value of the GO/MMT composite was calculated to be 1.13, showing a change in the GO structure. In the addition of 0.04 wt% GO to MMT, the value of interlayer space (d) was up to 13.0 Å measured by XRD due to the insertion of GO into MMT. The evident increases in contents of carbon atoms (26.59%) and nitrogen atoms (3.44%) indicate that GO was successfully combined with MMT. The nano-pores and clay sheets were not observed in the SEM image of GO/clay, but obvious wrinkles, while flexible sheets were observed in the typical scanning electron microscopy images of GO. This further proves that GO was combining with clay. The TEM image shows that the GO nano-sheets were tiled on the surface of MMT sheets. This observation suggests that a stable assembly structure was formed between GO sheets and MMT sheets. The change in particle size of MMT with the addition of GO shows that interaction occurred between GO sheets and MMT sheets, which was further confirmed by the results of zeta potential. Adsorption and insertion were the main mechanisms to assemble GO and MMT.

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Section: Introductionmentioning

confidence: 99%

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Weijia

et al. 2018

Pet. Sci.

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“…[1]. In particular, wellbore instability sometimes leads to the pipe becoming stuck, which may require plugging and side tracking, significantly driving up the cost of reservoir development [7]. Moreover, the driller's ability to maintain tool face control and to Following this, the superimposed pressure pulses propagate to the axial oscillation assembly, where they are converted into an axial oscillating motion.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Fluidic Axial Oscillation Tool for Friction Reduction with the Absence of a Throttling Plate

et al. 2017

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An axial oscillation tool is proved to be effective in solving problems associated with high friction and torque in the sliding drilling of a complex well. The fluidic axial oscillation tool, based on an output-fed bistable fluidic oscillator, is a type of axial oscillation tool which has become increasingly popular in recent years. The aim of this paper is to analyze the dynamic flow behavior of a fluidic axial oscillation tool with the absence of a throttling plate in order to evaluate its overall performance. In particular, the differences between the original design with a throttling plate and the current default design are profoundly analyzed, and an improvement is expected to be recorded for the latter. A commercial computational fluid dynamics code, Fluent, was used to predict the pressure drop and oscillation frequency of a fluidic axial oscillation tool. The results of the numerical simulations agree well with corresponding experimental results. A sufficient pressure pulse amplitude with a low pressure drop is desired in this study. Therefore, a relative pulse amplitude of pressure drop and displacement are introduced in our study. A comparison analysis between the two designs with and without a throttling plate indicates that when the supply flow rate is relatively low or higher than a certain value, the fluidic axial oscillation tool with a throttling plate exhibits a better performance; otherwise, the fluidic axial oscillation tool without a throttling plate seems to be a preferred alternative. In most of the operating circumstances in terms of the supply flow rate and pressure drop, the fluidic axial oscillation tool performs better than the original design.

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“…Wellbore stability and formation damage are the critical issue in the drilling industry, and the drilling fluid engineers and experts have been plagued by that problems encountered in shale formation all the time [1][2][3]. When drilling an oil well, adequate filtration for the drilling fluid is essential to prevent drilling problems such as excessive torque and drag; differential pressure sticking; borehole instability; and formation damage.…”

Section: Introductionmentioning

confidence: 99%

Fluid loss additive base on Nano flexible polymer

Qi¹,

Jiang²,

An³

et al. 2017

Advanced Materials and Energy Sustainability

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In this paper, Nano-fluid loss additive was synthesized and characterized using Transmission Electron Microscopy (TEM) and the particle size analyzer. The TEM results have shown the formation of microspheres and the linkage of molecular polymer chains with hydrogen and ionic bonding. Particle size analysis indicated the presence of flexible Nano material in water and the stability of the Nano material in drilling fluid. The fluid property tests demonstrated that the filtration of Nano polymer was fairly good with the usage of common fluid loss agent. In addition, there was only a small change of filtration volumes before and after the administering of the aging test at 180°C, indicating high thermal stability.

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Analysis of wellbore instability in vertical, directional, and horizontal wells using field data

Cited by 79 publications

References 6 publications

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

The assembly of a composite based on nano-sheet graphene oxide and montmorillonite

Performance Analysis of a Fluidic Axial Oscillation Tool for Friction Reduction with the Absence of a Throttling Plate

Fluid loss additive base on Nano flexible polymer

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