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Expandable Tubulars Enable Multi-Zone Frac-Packing in the Open Hole
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Abstract
Investigation is underway to enhance potential production rates by actualizing a method of frac-packing multi-zone slim holes and sidetracks using solid and slotted expandable casing. This innovative technique replaces the production liner and the cementing and perforating phases in a normal completion. The increased completion ID and flow areas provided by the expandable completion allow a significant increase in the frac-pack sand-screen size and associated production tubulars. The expanded completion liner itself offers more than a ten-fold increase in inflow area over a conventional perforated liner. These two factors, when combined, allow both reliable and improved production rates from 6 in. openhole sidetracked sand control wells requiring frac-packing.
By utilizing these expandable slotted completion liners in conjunction with a newly developed solid expandable openhole packer system, the operator can selectively expand discrete production (or injection) zones and, with an appropriate frac-pack screen design, effectively control flow from the individual zones. Using selectively-expandable isolation devices allows the end user to decide their placement after the well evaluation data has been analyzed. This flexibility enables the end user to optimize the effectiveness of the completion.
This paper will review the completion challenges with perforating and frac-packing inside small completion liners or open holes, the available technologies to perform isolation in the open hole, and the process and features associated with an expandable completion run prior to frac-packing. The results of ongoing testing and field trials of the expandable packer system will be presented and analyzed along with supporting modeling and simulation work.
In effect, the new system allows an operator to perform an open-hole frac-pack inside a 6 in. sidetracked hole, obtain higher sustained production rates, and thereby, improve project economics over conventional techniques. This system, in some cases, will allow additional reserves recovery in difficult sand-control environments and revitalize maturing fields.
Title: Expandable Tubulars Enable Multi-Zone Frac-Packing in the Open Hole
Description:
Abstract
Investigation is underway to enhance potential production rates by actualizing a method of frac-packing multi-zone slim holes and sidetracks using solid and slotted expandable casing.
This innovative technique replaces the production liner and the cementing and perforating phases in a normal completion.
The increased completion ID and flow areas provided by the expandable completion allow a significant increase in the frac-pack sand-screen size and associated production tubulars.
The expanded completion liner itself offers more than a ten-fold increase in inflow area over a conventional perforated liner.
These two factors, when combined, allow both reliable and improved production rates from 6 in.
openhole sidetracked sand control wells requiring frac-packing.
By utilizing these expandable slotted completion liners in conjunction with a newly developed solid expandable openhole packer system, the operator can selectively expand discrete production (or injection) zones and, with an appropriate frac-pack screen design, effectively control flow from the individual zones.
Using selectively-expandable isolation devices allows the end user to decide their placement after the well evaluation data has been analyzed.
This flexibility enables the end user to optimize the effectiveness of the completion.
This paper will review the completion challenges with perforating and frac-packing inside small completion liners or open holes, the available technologies to perform isolation in the open hole, and the process and features associated with an expandable completion run prior to frac-packing.
The results of ongoing testing and field trials of the expandable packer system will be presented and analyzed along with supporting modeling and simulation work.
In effect, the new system allows an operator to perform an open-hole frac-pack inside a 6 in.
sidetracked hole, obtain higher sustained production rates, and thereby, improve project economics over conventional techniques.
This system, in some cases, will allow additional reserves recovery in difficult sand-control environments and revitalize maturing fields.
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