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Technical Paper: Design, Qualification, and Installation of Openhole Gravel Packs: Mari B Field, Offshore Israel

Society: SPE
Paper Number: 158655
Presentation Date: 2012
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Abstract

A case history from offshore Israel is presented that describes the successful delivery of two ultra-high-rate gas wells (>200 MMscf/d) completed in a depleted gas reservoir with 9 5/8-in production tubing and an openhole gravel pack (OHGP). Maximizing gas off-take rates from a volumetric drive gas reservoir that possesses high flow capacity (kh) requires large internal diameter (ID) tubing coupled with efficient sandface completions. When sand control is required, the OHGP offers the most efficient as well as the most reliable long-term track record of performance. A global study of wells completed with 9 5/8-in production tubing ("big bore") determined that this design concept was feasible and deliverable in a short time frame while still maintaining engineering rigor. The paper will highlight key accomplishments within various phases of a completion delivery process with particular emphasis on the sand control design, testing, and execution. The completions were installed with minimal issues (NPT ~9%) and have produced without incident. The two wells, Mari-B #9 and #10, achieved a peak gas rate of 223 and 246 MMscf/d, respectively.

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