Modeling the time and cost to drill an offshore well

Kaiser, Mark J.

doi:10.1016/j.energy.2009.02.017

Cited by 53 publications

(16 citation statements)

References 26 publications

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“…Some drilling site features such as depth, operator and workforce experience, and the environmental situation can significantly impact the operator's decision regarding the rig type and contract selection. Other contingencies like stuck pipe and mechanical equipment failure are not predictable; but, they can greatly affect the cost and time of drilling [5]. Geothermal drilling technologies have developed from a combination of oil and gas and hydrothermal drilling technology as their equipment and materials are similar.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study and economic analysis of geothermal well drilling

Shamoushaki

Fiaschi

Manfrida

et al. 2021

International Journal of Environmental Studies

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This paper reports a comprehensive survey of well drilling time and cost. The models include both specific correlations on various well types and generalised correlations for rough estimation. The models are derived from robust multivariable regression to minimise the residuals. Africa has the highest construction cost component in well drilling and the United States has the lowest. Data in various regions are compared with European and World average drilling data. Drilling time in Italy is similar to Europe and world averages. The proposed model directly estimates both the drilling cost and time to be used in fundamental research and feasibility studies for geothermal power plants applicable worldwide.

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Section: Introductionmentioning

confidence: 99%

Feasibility study and economic analysis of geothermal well drilling

Shamoushaki

Fiaschi

Manfrida

et al. 2021

International Journal of Environmental Studies

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“…The temperature is one of the most prominent factors affecting 2 of 33 production operations, including reservoir characterization and the qualitative or quantitative interpretation of fluid rheology, cementing quality, thermal fatigue failure, pressure control and stability for wellbore, etc. [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A Coupled Model of Two-Phase Fluid Flow and Heat Transfer to Transient Temperature Distribution and Seepage Characteristics for Water-Flooding Production Well with Multiple Pay Zones

Huang

et al. 2019

Energies

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Temperature is one of the most prominent factors affecting production operations, predicting the accurate wellbore-formation temperature in a water-flooding production well is of great importance for multiple applications. In this paper, an improved coupled model of oil–water two-phase fluid flow and heat transfer was developed to investigate the transient temperature behavior for a producing well with multiple pay zones. Firstly, a novel method was derived to simulate the water saturation and the water breakthrough time (WBT) for tubing, which are key monitoring parameters in the process of water flooding. Then, we incorporated water saturation and an equation set for immiscible displacement to calculate the seepage velocity and the pressure of the two-phase fluid in the pay zones. Next, the upward seepage velocity of the tubing fluid change with depth was focused on, and the proper coupled initial and boundary conditions are presented at the interfaces, therewith the implicit finite difference method was used to compute the transient temperature with the input of the seepage characteristics for the reservoirs. Meanwhile, the validity of the proposed model has been verified by the typical model. Finally, a sensitivity analysis delineated that the production rate and the production time had a significant impact on the tubing fluid temperature. The overburden was hotter with a lower volumetric heat capacity or a higher thermal conductivity. In addition, the sensitivity of the porosity and the irreducible water saturation to formation temperature was significantly different before and after the WBT. The coupled model presented herein helps to advance the transient seepage characteristics analysis of pay zones, the precise temperature prediction is very useful for reservoir characterization and production analysis purposes and provides insight for designing the exploitation scheme in deep reservoirs and geothermal resources.

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“…A construção de poços marítimos tem se mostrado uma atividade complexa e de alto risco [Kaiser, 2009]. Para efetuar esta atividade as empresas operadoras se valem principalmente das unidades de intervenção de poços, também conhecidas como sondas marítimas.…”

Section: Introductionunclassified

Classificação de falhas de equipamentos de unidade de intervenção em construção de poços marítimos por meio de mineração textual

Cesar¹,

Vellasco²,

Figueiredo³

2019

Anais Do XVI Encontro Nacional De Inteligência Artificial E Computacional (ENIAC 2019)

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This paper proposes the development of a tool to optimize classification of textual records related to failures in offshore drilling rig equipment. Given the high cost of offshore drilling rigs and the high amount of time spent reading and interpreting textual data, this tool translates into a practical and efficient way to tackle this type of data. After some adjustments on the database, the tools performance achieved outstanding results.

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Modeling the time and cost to drill an offshore well

Cited by 53 publications

References 26 publications

Feasibility study and economic analysis of geothermal well drilling

Feasibility study and economic analysis of geothermal well drilling

A Coupled Model of Two-Phase Fluid Flow and Heat Transfer to Transient Temperature Distribution and Seepage Characteristics for Water-Flooding Production Well with Multiple Pay Zones

Classificação de falhas de equipamentos de unidade de intervenção em construção de poços marítimos por meio de mineração textual

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