Deepwater development drilling is going to be one of the main keys to revitalize oil and gas industry in Malaysia as most of the shallow water reserves are heading towards their end-of-field life. However, this region's deepwater shallow seismic studies and findings from exploration and appraisal drilling shows that the subsea environment here comprises set of challenges, that if not carefully tackled, will turn the project to be un-attractive and irrelevant. This paper will explain the "collaborative" method that is used by the Deepwater Field Development Plan team during the well planning phase in detail and show how this method helped the team overcome a set of challenges efficiently, making the project able to progress to next stage.

The approach is to utilize different technology platforms where multiple disciplines gathered in collaborative well planning sessions to share their expertise in determining the optimum well placement that better suit the well trajectory, subsea facilities equipment placement and pipeline installation; whilst at the same time fulfilling the subsurface target requirement. This development field encompass enormous challenges such as presence of shallow gas, hydrates pocket, seafloor roughness, slope and slope failure, mud volcano, gulleys and pockmarks. All concerns are evaluated in detail on their risk ratings and associated impacts on the well design. The entire well plan is shared live during the session for better view and understanding, and any amendment is done and evaluated in real time to accommodate all parties’ requirement.

In conclusion, this paper will discuss the step-by-step method used to achieve the best engineering design for subsea development producer and injector wells in a complex seabed environment. Iterative collaborative sessions have proven to provide a platform to achieve a collective agreement to safely place the development wells efficiently. These sessions are key to unlock the opportunities and identifying threats at a very preliminary stage of the Field Development Plan (FDP). This paper would provide a greater insight of deepwater development well planning strategy in a challenging oil and gas environment with lessons learnt and best practices recommendation for future complex subsea FDP planning references.

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