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Abstract

The Norne Field is a mature oil field located on the Norwegian continental shelf in 380 meters water depth and it has been on production since November 1997. The reservoir drainage strategy in the oil zone has been WAG injection, followed by only water injection from 2007, and the pressure support is successfully achieved; however, the major challenge in this field is to optimize the vertical and areal sweep efficiency. Different methods and techniques have been applied to understand the current water injection strategy in order to optimize the macroscopic (vertical and areal) sweep efficiency: 1) Reviewing the historical well injection data. 2) Hall plot technique for evaluating the vertical sweep efficiency. 3) Tracer data to evaluate the areal sweep efficiency. 4) Spearman's rank correlation to investigate injection-production well relationships. 5) Full field and conceptual fine gridded simulation models. The major conclusions of these evaluations are: 1) The Hall plots can be used to better understand the water injection history and to make recommendations regarding which wells that should be logged (ILT/RST). 2) Spearman's rank correlation has been unsuccessful in finding injection-production well relationships. 3) The coarse full field model gives a reasonable prediction of drainage performance. 4) Conceptual simulation model indicates the vertical injection inflow profiles are of limited importance. Improving the field water injection strategy is important for maximizing the field recovery factor. In order to achieve this goal, several recommendations have been made for improving the current field water injection strategy.

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/content/papers/10.3997/2214-4609-pdb.293.G042
2012-06-04
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.293.G042
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