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Increased Oil Recovery from a Mature Oil Field by Gas Injection

机译：通过气体注射从成熟的油田中提高了石油回收

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Increased oil recovery from a mature oil field by gas injection. The Varg field is located offshore Norway. The field is produced through a fixed well head platform and a leased FPSO. Late life reservoir management has proven challenging due to complex geological setting, marginal resource and production rates The Varg field has first oil in 1998 and was sanction with a 33 mmstb reserves in the PDO Currently 100 mstb is produced. The increases in reserves are mainly due to infill drilling and putting new segments of the field on production, but also trough IOR and reservoir management. Field life could be extended further trough successful infill drilling. 3rd party tie in, effective reservoir management or cost reductions. Gas based IOR has been successfully applied in several wells on Varg. In the East segment WAG in the well pair A07C-A10A has resulted in more than 2 mmstb incremental oil. The paper will show comprehensive analysis of the production results, a discussion of recovery mechanism and modelling results. In other parts of the field huff n puff gas injection has been used. This has been an opportunistic and cost effective way to get gas injection benefits without having gas injectors Gas has been injected into the reservoir using the gas lift system The objectives have been reduction of water production, deeper lift and displacing attic oil. Analysis has been carried out to optimize oil production from From February 2014 Gas Export started from the Varg field. The gas injection; the value of sales gas has to be evaluated against value of incremental oil from gas injection. These economic evaluations are based on a simple cash flow analysis which in some cases favours gas export and in other gas injection.
机译：通过气体注射从成熟的油田中提高了石油回收。 Varg领域位于挪威海上。该领域通过固定井头平台和租用的FPSO制造。由于复杂的地质环境，边际资源和生产率达到了挑战，瓦尔格领域于1998年拥有第一石油，并在目前提供了33 MMStB储备，制定了33 MMStB储备。储备的增加主要是由于填充钻井和生产领域的新段，也是低谷IOR和水库管理。场面生活可以延伸进一步的低谷成功的漏洞。第三方领带，有效的水库管理或成本降低。基于天然气的IOR已成功应用于Varg上的几个井。在井对中的东部脉冲中，A07C-A10A导致了2个以上的MMSTB增量油。本文将综合分析生产结果，讨论恢复机制和建模结果。在其他部分的领域，已经使用了困难的困难。这是一种机会主义和成本效益的方法来获得气体注入效益，而不使用气体喷射器使用气体升力系统注入水库，目的已经减少了水生产，更深的升力和阁楼油。已经进行了分析，以优化2014年2月的石油产量，从Varg领域开始。气体注射;必须评估销售气体的价值免于气体注入的增量油的价值。这些经济评估基于简单的现金流量分析，在某些情况下有利于燃气出口和其他气体注入。

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