PROJECT SHOWCASE

Well Development - Feasibility Studies

Shwe & Shwe Phyu Development Feasibility Study

Client:

Daewoo International E&P

Country:

Myanmar

Year:

2005/06

Project Summary

Add IPS provided drilling input to a study group led by Genesis Oil & Gas (London, UK). The Operator, Daewoo International E&P, had discovered significant gas resources in moderate water depths (90 – 400 m) offshore Myanmar and wanted to evaluate a range of development scenarios from a commercial, feasibility and schedule standpoint with a view to selecting a development concept to take forward to the FEED stage.

The study group produced a comprehensive evaluation and recommendation that was adopted by the client. The selected development concept included an integrated drilling and production platform, additional subsea wells, a subsea export pipeline to an onshore facility and an onshore pipeline from there to Western China.

Add IPS provided all drilling input to this study and was subsequently retained by the client to assist with further appraisal drilling, planning and execution of the subsea development wells (completed October 2011) and planning and execution of the platform wells (drilling to commence in Q1 2013).

What We Did

Add IPS’ work scope including the following main activities:

  • A detailed offset well review.
  • High level designs for platform and subsea development wells, including material recommendations.
  • Well time and cost estimates, incorporating seasonal (weather related) and technical contingency factors.
  • Evaluation of optimum placement of wellhead platform(s) and subsea wells/clusters. A particular challenge in this field was a water depth that was right on the limit of large jack‐up access and reservoir(s) that covered a relative large area requiring extended reach drilling with most wells having to be drilled in a direction that was suboptimal in relation to the earth stress regime.

 

  • Evaluate ERD opportunities and constraints, including benchmarking of world‐wide ERD experience.
  • Identification of well related risks and mitigation measures.
  • Time and cost estimates for drilling and completions and also life of field well intervention.
  • Input to the project master schedule.

Software Employed

  • In‐house developed model for scenario based drilling time and cost estimates.
  • In‐house developed model for estimation of optimum placement of wellhead platforms and subsea templates.

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Chim Sao and Blackbird Development Study

Client:

Premier Oil

Country:

Vietnam

Year:

2007

Project Summary

Add IPS provided a development drilling feasibility study directly to Premier Oil Vietnam. The Operator had discovered a mid‐sized oil field in around 90 m water depth and wanted to investigate a range of development drilling options for wells placed in two separate structures. Using in‐house developed software models Add IPS investigated a range of drilling and development options involving both 1 and 2 wellhead platforms and several optional subsea wells. A comprehensive report with recommendations was produced and this provided input to the integrated pre‐FEED study that started shortly thereafter.

Phase 1 development drilling from a jack‐up over a wellhead platform commenced in 2010 and the field was brought on stream in November 2011.

What We Did

Add IPS’ work scope including the following main activities:

  • A detailed offset well review.
  • High level designs for platform and subsea development wells.
  • Well time and cost estimates, incorporating seasonal (weather related) and technical contingency factors.
  • Evaluation of optimum placement of wellhead platform(s) and subsea wells/clusters. A particular challenge in this field was a water depth that was right on the limit of large jack‐up access and reservoir(s) that covered a relative large area requiring extended reach drilling with most wells having to be drilled in a direction that was suboptimal in relation to the earth stress regime.

 

  • Identification of well related risks and mitigation measures.
  • Time and cost estimates for drilling and completions and also life of field well intervention.
  • Evaluation of rig options, rig availability and rig rate projections.
  • Input to the project master schedule.

Software Employed

  • In‐house developed model for scenario based drilling time and cost estimates.
  • In‐house developed model for estimation of optimum placement of wellhead platforms and subsea templates.

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Zawtika Subsea Development Study

Client:

PTTEP

Country:

Myanmar

Year:

2011

Project Summary

Add IPS provided drilling, completions and subsea technology input to a study group led by Technip (Kuala Lumpur, Malaysia and Perth, Western Australia). The Operator, PTTEP had discovered a significant gas field offshore Myanmar and had defined a base field development case which first phase included an integrated production platform and a second phase which required one or more additional wellhead platforms. As sensitivity PTTEP wanted to thoroughly investigate an alternative second development phase which incorporated subsea wells rather than additional wellhead platforms.

The study group produced a comprehensive evaluation of the subsea development option. Add IPS provided all the drilling completions and subsea well input to this study. The client is currently considering the input provided by the study group in order to decide on a final phase two development concept.

What We Did

Add IPS’ work scope including the following main activities:

  • A detailed offset well review
  • Drilling and Completions design for subsea development wells
  • Well time and cost estimates, incorporating relevant technical contingency factors.
  • Evaluation of optimum placement of subsea wells/clusters considering well and tie‐back costs and drilling technical challenges.

 

  • Identification of well related risks and mitigation measures
  • Time and cost estimates for drilling and completions and also life of field well intervention.
  • Input to the project master schedule.

Software Employed

  • In‐house developed model for scenario based drilling time and cost estimates.
  • Landmark software for casing design and directional well planning.

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Rong Doi Moi Development Study

Client:

KNOC

Country:

Vietnam

Year:

2011

Project Summary

Add IPS provided drilling and completions input to a study group led by Upstream Advisors (London, UK). The Operator, KNOC, had previously developed the Rong Doi gas field offshore Vietnam using an integrated production platform. It engaged to study group to investigate various options for development of the adjacent Rong Doi Moi gas prospect.

The study investigated several options for development of the Rong Doi Moi prospect using relatively simple subsea wells and also development by drilling of complex ERD wells from the existing platform with several well paths considered due to the presence of a potentially troublesome fault between the platform and the target prospect.

The study group produced a comprehensive report with field architectures, relative costing, risk evaluations and recommendations for future work. The study was completed in November 2011 and the Operator is currently evaluating the data and recommendations presented.

What We Did

Add IPS’ work scope including the following main activities:

  • A detailed offset well review
  • Drilling and Completions design for both subsea and platform ERD development wells
  • Drilling risk analysis
  • Probabilistic well time and cost estimates, considering the relative technical risks associated with each option studied.
  • Development of well intervention cost estimates.

 

  • Identification of well related risks and mitigation measures
  • Identification of drilling rig minimum technical specifications for each case considered.
  • Recommendation of scope of work for further studies.
  • Input to the project master schedule.

Software Employed

  • In‐house developed model for scenario based drilling time and cost estimates.
  • Landmark software for casing design and directional well planning.

Learn More - Drilling and Wells Operations

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