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Technical Paper: Successful Application of Fiber-Optic-Enabled Coiled Tubing and Inflatable Packer Used for Testing the Formation's Upper Zone

Society: ICoTA
Paper Number: 168262
Presentation Date: 2014
 Download: Successful Application of Fiber-Optic-Enabled Coiled Tubing and Inflatable Packer Used for Testing the Formation's Upper Zone (3.86 MB PDF) Login | Register

 

Abstract

Floreña field, located north of the Cusiana and Cupiagua fields, has been producing since 2001. Floreña field is part of the series of thrust sheets developed as result of the Eastern Cordillera uplifting.

In order to determine pressure depletion, establish connectivity between wells, reduce the risks of geological uncertainty along the field, and meet Ministry of Mines data acquisition commitments, we performed a pressure buildup test using inflatable packers as the isolation method.

In the past, when a pressure buildup test was required in the well’s upper formation, operators had to set up a bridge plug in the lowest part of the tested formation, set up a sand plug, and finally, pump a cement plug. These extra steps increased HSE risks and project costs.

A synergistic approach using real-time downhole measurements from fiber optic coiled tubing were combined with the cased hole inflatable packer to improve operation reliability while reducing risk of failure and time.

The availability of real-time logging casing collar locator (CCL), annular, coiled tubing (CT) bottomhole pressure, and bottomhole temperature data allowed the inflatable packer to be set properly. The measurements helped ensure adequate packer inflation, monitor the maximum draw down without exceeding the packer integrity, and perform a well test to a specific formation in just one run. In addition, the BHA configuration allows a memory tool down the packer to record the lowest formation static pressure.

After the pressure buildup test was performed, the results showed well connectivity with Floreña Field. The test also confirmed reservoir pressure and permeability which helped in future job and field planning.

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