HPHT Well Basis of Design Case Study: Offshore Thailand Advanced Tubular Analyses Experience

Rosland, Habil Akram; Effendhy, E.; Park, S.J.

doi:10.2523/17104-ms

Cited by 2 publications

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“…However, there are references to other parts of the world such as Canada (Law, et al, 2000), India (Kumar, et al, 2010), Norway (Fitnawan, et al, 2011) and Thailand (Rosland, et al, 2013) where HPHT completions and associated design analyses have been successfully applied. However, there are references to other parts of the world such as Canada (Law, et al, 2000), India (Kumar, et al, 2010), Norway (Fitnawan, et al, 2011) and Thailand (Rosland, et al, 2013) where HPHT completions and associated design analyses have been successfully applied.…”

Section: Introductionmentioning

confidence: 99%

Importance of Thermal/Stress Loading Analysis for Tubulars in HPHT Wells

Shahreyar¹,

Finley

2014

All Days

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The upstream oil and gas industry is experiencing increased interest in exploration and production from complex, hostile, and deeper geologic horizons that are classified as high-pressure/high-temperature (HPHT) wells. As a result, well completion planning and design has become increasingly more critical and challenging due to uncertainties that might occur during various operational scenarios in the well's lifecycle that could result from high pressure and temperature changes.The cost of typical tubing completion equipment may represent 15 to 25% of the overall well cost. High operating temperatures and pressures can cause the well to operate with significant pipe movement and high axial loads at the packer and tubing. For wells where design margins can be slim, a detailed and robust stress-loading analysis coupled with the aid of modern thermal/stress analytical software provides the opportunity to balance tubular equipment design versus risk. Proper application of this loading analysis can generate significant savings on tubular costs by optimizing the tubing design so that it will meet a company's design standards without being overdesigned.This paper provides an overview of an engineering design methodology that can be followed for tubular equipment sizing and selection for use in complex wells. A typical list of reservoir and well parameters that is required to set up the well model for thermal and stress-loading analysis is presented. The importance of estimated thermal simulation is highlighted for tubular selection and design. Furthermore, a full well casing and tubing design integrity analysis is performed on a complex, high rate, HPHT example well with various anticipated operating loads that include stimulation, production, and enhanced oil recovery (EOR) flooding during the life of the well. Results showing changes in temperature and pressures during well operating scenarios and impact of resultant temperature changes on tubular stress loading are presented. Sensitivity analysis is then performed with applied landing forces on the completion for further discussion on limitations on well operating conditions during the well life cycle.

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Section: Introductionmentioning

confidence: 99%

Importance of Thermal/Stress Loading Analysis for Tubulars in HPHT Wells

Shahreyar¹,

Finley

2014

All Days

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Batch Completion Operations Cost Reduction in a Segregated Drilling Campaign: Surface Equipment Requirements

Canny¹

2017

Day 3 Wed, May 03, 2017

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In an effort to reduce project construction and start-up costs, novel and alternative well construction models have been developed and adopted globally. One such approach is to adopt a segregated drilling campaign, the well construction and completions operations can be segregated into two distinct phases. A drilling and casing phase leaving a cased well in a Temporary Abandonment (TA) status, followed by a phase consisting of WBC (wellbore clean-up), completion and stimulation operations resulting in the handover of the well to production to bring hydrocarbon production online. As such this provides an opportunity to reduce surface equipment specification and costs, in comparison to that which is required for drilling activities. A potential solution exists by utilising alternative technology with the capability to perform perforation, multi-zone completion installation, stimulation, WBC operations and well testing, at comparatively lower cost than conventional drilling technology. This paper describes the collaborative development of such technology, and focuses on the definition of the surface equipment requirements and specification phase, pertaining to the typical downhole operations required to be executed during the multi-zone completion installation, stimulation, WBC operations and well testing. Each operation is assessed to give a base required capability, with further operations that are deemed to have a critical effect on the efficiency and duration, identified. A typical anticipated operations program is presented and the study focuses on the first principle requirements of each of the steps. Further operation considerations are presented and discussed for each operational step, forming the basis of discreet specifications per step. Further, the identification of operations not on the critical path that can be performed simultaneously or as an offline activity, have the potential to make high cost impacts. Collaboration between the Yangon based operator and service provider drives a design which provides a technically pragmatic and capable ICU (Intervention and Completion Unit) and as such attracting project cost savings allied to lower support equipment costs. Further, the deployment flexibility of the ICU allows it to perform operations ranging from well construction activities such as well slot preparation, completions and intervention, to well deconstruction activities such as heavy workover, Permanent Abandonment (PA) phases and slot recovery. The ability to perform multi-phase operations whilst mobilized to a platform brings further cost benefits and operational flexibility.

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HPHT Well Basis of Design Case Study: Offshore Thailand Advanced Tubular Analyses Experience

Cited by 2 publications

References 0 publications

Importance of Thermal/Stress Loading Analysis for Tubulars in HPHT Wells

Importance of Thermal/Stress Loading Analysis for Tubulars in HPHT Wells

Batch Completion Operations Cost Reduction in a Segregated Drilling Campaign: Surface Equipment Requirements

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