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Giving the Old Idea a New Lease of Life |
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New ideas are not always accepted immediately after birth. Whether for personal reasons or through the workings of circumstances, new ideas and technologies often stay unnoticed for long periods of time. However, life moves on and creates new opportunities where such ideas can be implemented.
This seems to be the case with the Y-tool, a Y-shaped by-pass device used to lower logging equipment into the wellbore. It allows to run logging tools past the ESP to carry out production logging operations without the need to pull the completion. The idea was first voiced a long time ago – back in the 1970s, but had not transformed into a commercial technology. One reason was additional costs required to use larger casing strings to give room for both the logging tool and the electrical submersible pump (ESP).
With time, oil production companies gradually started to use the Y-tool, so has SPD in its operations at the Salym fields. Before making the choice, the company studied other options for production logging operations: placing the tool into the pump assembly and logging under pressure. However, those other options proved less attractive in terms of safety and efficiency.
SPD is now one of the few oil production companies that uses the Y-tool in a 7” casing. The whole process from the design stage has been coordinated by the well services department, including the selection of an optimum size of the ESP and by-pass system to allow for the operation of modern logging equipment.
The first Y-tool assembly was installed in a J-shaped well in West Salym last July. The task included the removal of the plug and running a logging tool on a wireline in a 50o well and was successfully accomplished. The logging tool was placed under the ESP to allow for the well logging operation irrespective of the status of the ESP.
Flow rates in different perforation intervals and other valuable geophysical information will now be collected for production optimization and enhanced recovery plans. The solution also helps comply with the Technological Schema that requires that flow rates be recorded in all reference wells.
At this point in time, 7 wells in West Salym and Vadelyp have been completed using the Y-tool technology, and more are coming. SPD has contracted a company to improve the design of the Y-shaped by-pass tool, giving that old idea a new lease of life.
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INFORMATION |
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Copyright © 2004 Salym Petroleum Development N. V.
// Russia, 31, Novinsky blvd, Moscow,
Tel.: +7 (495) 518-97-20,
Email: info@spdnv.ru |
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