This paper describes the planning, execution, improvements, and results from a multi-well fishing campaign using a snubbing unit on pressurized H2S wells for a national oil company (NOC) in the Middle East. A suitable blow out preventer (BOP) stack is shown for fishing coiled tubing, wireline tools, and milling along with the contingencies considered and how these were incorporated into the design of the stack. The challenges encountered during the execution phase are explained along with the solutions implemented. The key performance indicators used and how these improved the operational efficiency during the campaign are discussed. The well problems, desired results, and actual results of the interventions on the wells completed to date are shown.

Keywords:
downhole intervention, Upstream Oil & Gas, Drilling Equipment, Well Intervention, BOP stack, well control equipment, production enhancement, multi-well fishing campaign, operation, coiled tubing
Subjects:
Drilling Equipment, Well control equipment, Well Intervention
Copyright 2019, Society of Petroleum Engineers
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