Evaluation of the behaviour of the lateral boreholes in the Gorm chalk field

Medetbekova, Maiya; Hajiabadi, Mohammad Reza; Christensen, H.F.; Brovelli, Alessandro; Shamsolhodaei, A.; Sørensen, Henning Osholm; Müter, Dirk; Nick, Hamidreza M.

doi:10.1016/j.ijrmms.2020.104499

Cited by 7 publications

(2 citation statements)

References 30 publications

(35 reference statements)

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“…We demonstrated the effect of viscous deformation on breakout development around the wellbore in SLH tests. This results can be compared with those of (Medetbekova et al, 2020b) for a similar test, but under lower stress condition on a chalk sample of a similar reservoir. The temporal evolution of stresses and axial strain in their work are shown in Fig.…”

Section: Discussionmentioning

confidence: 98%

An evaluation of viscous deformation of chalk on wellbore stability

Hajiabadi

Afrough

Nick

2022

Journal of Natural Gas Science and Engineering

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Section: Discussionmentioning

confidence: 98%

An evaluation of viscous deformation of chalk on wellbore stability

Hajiabadi

Afrough

Nick

2022

Journal of Natural Gas Science and Engineering

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“…As such, soft formations like chalk pose significant wellbore instability issues during drilling and production due to their complex geomechanics 2 , 5 – 8 . It has been reported that chalk formations experience viscous deformations under constant stresses, leading to the breakdown of the rock structure 2 , 9 , 10 . Common methods of wellbore instability prevention include extensive geomechanics modeling of the target formation and selection of appropriate drilling and completion strategies 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

In-situ micro-CT scanning and compressive strength assessment of diammonium hydrogen phosphate (DAP) treated chalk

Samarkin,

Amao,

Aljawad

et al. 2023

Sci Rep

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The occurrence of wellbore mechanical failure is a consequence of the interaction among factors such as in situ stress, rock strength, and engineering procedures. The process of hydrocarbons production, causing reduction of pore pressure, alters the effective stresses in the vicinity of a borehole, leading to borehole instability issues. Estimating the rocks’ elastic modulus and compressive strength is essential to comprehend the rock matrix’s mechanical response during drilling and production operations. This study aimed to assess the practicality of Diammonium Hydrogen Phosphate (DAP) application as a chemical for strengthening chalk in hydrocarbon reservoirs, to make it resistant to high stresses and failure during drilling and production. The mechanical and physical properties of Austin chalk rock samples treated with DAP under mimicked reservoir conditions were studied. The results showed that DAP is a highly effective carbonate rock consolidating agent that improves the mechanical strength of the chalk. Compressive test measurements conducted on rocks treated at two different temperatures (ambient and 50 °C) showed that DAP effectively strengthened the rock matrix, resulting in an increase in its compressive strength (22–24%) and elastic modulus (up to 115%) compared to the untreated sample. The favorable outcomes of this research suggest that the DAP solution holds promise as a consolidation agent in hydrocarbon reservoirs. This contributes to the advancement of knowledge regarding effective strategies for mitigating mechanical failures of the wellbore during drilling and production.

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