Case Study: Single-Trip Multizone Cased-hole Frac Packs and Intelligent Completions Improve Recovery in Subsea Gas Field

Advanced completion solution enables wells to remain fully functional after five years of production

Challenge – The operator needed to improve operational efficiencies for this complex subsea field of shallow, low pressure, and weakly consolidated gas reservoirs. The field required a method of dealing with unconsolidated sands, along with the ability to monitor and control each of the six potential layers as the economics of the project required a single wellbore to access multiple reservoirs. Early water breakthrough was also a concern, with the potential impact of loading the production string with heavy water and curtailing ultimate recovery.

Solution – The Halliburton Enhanced Single-Trip Multizone (ESTMZ™) completion system was chosen for its ability to significantly improve operational efficiency. The system allows the sand control service tools and frac pack to be run in a single trip, and enables the intelligent completion system to be run inside the ESTMZ sand control system to monitor and control each reservoir. The Halliburton HS-ICVs (interval control valves) and ROCTM pressure and temperature gauges provided the operator the advantage of multi-rate testing and cleaning up each zone individually. The HS-ICVs were also used to permanently shut in several zones that were producing excessive water that would have jeopardized recovery from offset zones.

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