Rotary Liner Drilling for Depleted Reservoirs

Sinor, L.A.; Tybero, Pal; Eide, O.; Wenande, Bill

doi:10.2118/39399-ms

Cited by 20 publications

(4 citation statements)

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“…5,6 During this program, a total of seven drill-in liners were run with lengths up to 3,524-ft and at angles to 60º. Penetrations into the Arun ranged from 5-ft to 60-ft. Several of these liners did not effectively prevent further wellbore failure due to limited penetration into the Arun and leakage of the Baong Shale around an improperly cemented liner shoe and into the productive interval.…”

Section: Drill-in Linermentioning

confidence: 99%

Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Benesch

Nor

Ngatijan³

2004

IADC/SPE Drilling Conference

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fax 01-972-952-9435. AbstractA Big-Bore HTHP drilling and completion program of seven wells was undertaken under challenging conditions in a low pressure carbonate reef in Indonesia. Significant enhancements made during the program substantially reduced well times and cost. These wells incorporated the largest tubingless gas completions in the world. Higher than anticipated initial flow rates were achieved through an innovative strategy to decrease formation damage. The wells were completed open-hole without pumping kill weight fluids at the end of underbalanced drilling operations. These wells are the first to combine Big-Bore completions, drill-in liners and underbalanced drilling in individual wellbores.

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Section: Drill-in Linermentioning

confidence: 99%

Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Benesch

Nor

Ngatijan³

2004

IADC/SPE Drilling Conference

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“…The activity of a creeping formation may cause a stuck in the drilling string (Montilva et al, 2002;Tao and Ghassemi, 2007). Several ways and methods have been proposed so far for overcoming the above problems that, include of Aphron drilling fluid (Brown, 2002;Montilva et al, 2002), contingency casing (li, 1998;Sinor et al, 1998), underbalanced drilling (Marbun et al, 2011), but these methods are not economic mainly. The gap in considering wellbore stability by geo-mechanics in a depleted reservoir is significant.…”

Section: Introductionmentioning

confidence: 99%

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Pirhadi,

Kianoush,

Ebrahimabadi

et al. 2023

Preprint

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Maintaining wellbore stability in depleted reservoirs is a critical problem. With production from hydrocarbon reservoirs, the pore pressure of the reservoir is reduced over time, and the reservoir is depleted since field development is one of the main purposes for oil companies. Heavy mud weight in depleted reservoir caused fracture due to reduced fracture gradient, and low mud weight caused blow out in high-pressure zone or well collapse due to shale beds that required high mud weight to prevent collapse. Considering geomechanics and coupled equilibrium equation, continuity equation, Hook’s law, compatibility equation, Darcy’s law, and thermal relation, the Thermo-poro-elastic equation was derived in this research. A finite element method has been developed to implement the fully coupled thermo-poro-elastic non-linear models. The finite element model was validated by comparing it to the available analytical solutions for the thermo-poro-elastic wellbore problems in shale. The non-linear thermal-poro-elasticity finite element model was used to analyze wellbore stability in a depleted reservoir during drilling. The numerical results showed that a decrease drilling fluid’s temperature (cooling) causes to increase in the potential for tensile failure and reduces the potential of shear failure. Due to the depletion reservoir, the potential of tensile failure increased than shear failure, so heating the drilling fluid could cause wellbore stability in the depleted reservoir. Furthermore, based on the numerical results, it may be concluded that the drilling fluid’s temperature is one of the important factors in the wellbore stability analysis in depleted reservoirs.

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“…Multiple solutions are proposed for diffusion equations in simple geometric conditions. Typically, coupled equations have been solved using a semi-analytical solution for a vertical borehole in non-hydrostatic conditions (Aboustit et al, 1985;Brown, 2002;Kaliakin, 1994;li, 1998;Price et al, 1968;Sinor et al, 1998;Vaziri, 1996). Another factor affecting wellbore stability is the thermal stress effect from the temperature difference between mud and formation.…”

Section: Introductionmentioning

confidence: 99%

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Pirhadi,

Kianoush,

Ebrahimabadi

et al. 2023

Preprint

View full text Add to dashboard Cite

Maintaining wellbore stability in depleted reservoirs is a critical problem. With production from hydrocarbon reservoirs, the pore pressure of the reservoir is reduced over time, and the reservoir is depleted since field development is one of the main purposes for oil companies. Heavy mud weight in depleted reservoir caused fracture due to reduced fracture gradient, and low mud weight caused blow out in high-pressure zone or well collapse due to shale beds that required high mud weight to prevent collapse. Considering geomechanics and coupled equilibrium equation, continuity equation, Hook’s law, compatibility equation, Darcy’s law, and thermal relation, the Thermo-poro-elastic equation was derived in this research. A finite element method has been developed to implement the fully coupled thermo-poro-elastic non-linear models. The finite element model was validated by comparing it to the available analytical solutions for the thermo-poro-elastic wellbore problems in shale. The non-linear thermal-poro-elasticity finite element model was used to analyze wellbore stability in a depleted limestone reservoir during drilling. The numerical results showed that a decrease drilling fluid’s temperature (cooling) causes to increase in the potential for tensile failure and reduces the potential of shear failure. Due to the depletion reservoir, the potential of tensile failure increased than shear failure, so heating the drilling fluid could cause wellbore stability in the depleted reservoir. Furthermore, based on the numerical results, it may be concluded that the drilling fluid’s temperature is one of the important factors in the wellbore stability analysis in depleted reservoirs.

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Rotary Liner Drilling for Depleted Reservoirs

Cited by 20 publications

References 0 publications

Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Optimization of Big-Bore HTHP Wells to Exploit a Low Pressure Reservoir in Indonesia

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

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