Identifying Point of Failure and Repairing Damaged Sand Screens
- Karen Bybee (JPT Assistant Technology Editor)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- March 2010
- Document Type
- Journal Paper
- 57 - 59
- 2010. Society of Petroleum Engineers
- 4 in the last 30 days
- 125 since 2007
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This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 122153, "Identifying Point of Failure and Repairing Damaged Sand Screens in Gravel Packed Wells. A Case History From the Heidrun Field," by Per Einar Svela, SPE, Oyvind Gustavsen, Hilde Songstad Solli, SPE, and Oystein Brandal, StatoilHydro, originally prepared for the 2009 SPE European Formation Damage Conference, Scheveningen, The Netherlands, 27-29 May.
The full-length paper describes a method used on several wells in the Heidrun field to mitigate failures in gravel-packed screens. The method described includes how to identify sand production, the preferred way to run the well after sand production has been identified, and how to perform data acquisition to determine the point of failure. The data acquisition described includes gravel-pack logging, injection logging, and saturation logging.
The Heidrun field is located on Haltenbanken in the Norwegian Sea. The sea depth in the area is 350 m. The field has been developed with a floating concrete tension-leg platform installed over a subsea template with 56 well slots. The northern part of the field is developed with five subsea templates. Oil and gas production started in October 1995.
The reservoir consists of sandstones in the Garn, Ile, Tilje, and Aare formations of the Early and Middle Jurassic. The reservoir is heavily faulted. The Garn and Ile formations have good reservoir quality, while the Tilje and Aare formations are more complex. Most of the formations produced in the Heidrun field have a moderate-to-low sand strength and are prone to sand production. Several approaches to sand control have been tried, and the current base-case solution is openhole gravel-packed screens. The recovery strategy for the field is pressure maintenance using water and gas injection.
Sand production has both a production and a health, safety, and environmental (HSE) impact. Massive sand production can result in unwanted discharge into the environment during jetting of separators because oil coats the sand being jetted out. With regard to the safety aspects, gas velocity has to be considered. A high gas velocity means high erosion risk during sand production. Wells are divided into three categories, high-, medium-, and low-erosion risk, depending on the gas rate of the well.
|File Size||1 MB||Number of Pages||3|