41 PERFORATION RUNS INCREASES EFFCIENCY, OMAN

Well Tractor for CONVEYANCE SOLUTIONS

Background

Welltec®’s ability to conduct operations safer and more sustainably made an operator in Oman change intervention strategy. They had been conducting perforations using coiled tubing technology, which was successful but also timeconsuming as the rig-up procedure was lengthy and the operating times extended. With a view to optimizing their interventions the operator decided to use Welltec’s e-line Well Tractor® instead for their perforating requirements.

OPERATION

The job consisted of perforating a 1,916 ft (584 m) long total interval. The operation was to be executed over four phases as the operator wanted to test the flow between the different perforation stages.

The first phase was conducted in June 2014 where the total perforation interval was 517 ft (157.5 m). First run was a dummy run with the Well Tractor 218 in order to establish a clear path; second run was for correlation to determine the exact perforating depths.

On the third run, the Well Tractor 218 was activated to convey the perforation guns into the horizontal interval which was successfully perforated.

Phase 2 took place one month later. Here the Well Tractor 218 was requested to perforate a 415 ft (126.5 m) long interval. Over eight runs the Well Tractor successfully conveyed the perforating guns to total depth (TD).

After this accomplishment, Phase 3 began in August 2014 with the plan to perforate a 485 ft (148 m) interval. During the initial four runs the operator experienced a few issues due to the hole conditions, which put a limitation on the length of the guns that could be rigged up. The intended interval was perforated successfully.

Later that same month Phase 4 was also completed using the Well Tractor 218 to perforate a 499 ft (152 meter) interval.

ACHIEVEMENTS

Welltec’s services were applied exactly as the customer expected and proofed to be a reliable and valid approach for perforating long intervals. Conducting all the perforations on e-line secured a much more efficient operation both in terms of time and costs compared to the alternative methods. Risks were significantly reduced as considerably fewer people were required on location just like Welltec’s lightweight, e-line technology eliminated heavy lifts.

WELL TYPE: PRODUCER
MAX. DEVIATION: 89.9°
MAX. DEPTH: 14,518 FT (4,425 M)
MAX. PRESSURE: 54,900 KPA
MAX. TEMPERATURE: 163°F (73°C)

 

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Risks were significantly reduced as considerably fewer people were required on location just like Welltec’s lightweight, e-line technology eliminated heavy lifts.