フィージビリティスタディにおけるガスコンデンセート貯留層評価―コンデンセートバンキングの簡便な表現方法について―

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  • A reservoir modeling in feasibility study phase-Application for condensate banking modeling-
  • フィージビリティ スタディ ニ オケル ガス コンデンセート チョリュウソウ ヒョウカ コンデンセート バンキング ノ カンベン ナ ヒョウゲン ホウホウ ニ ツイテ
  • —Application for condensate banking modeling—
  • ―コンデンセートバンキングの簡便な表現方法について―

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A reservoir modeling using simulation software on the market is popular to evaluate production profile and has specific requirement in an each phase through a project. Generally, a simpler model is preferred to examine many cases about production scenarios for a commercial evaluation in feasibility study phase. So, it is very important how to express subsurface uncertainty in a simple reservoir model.<br>A condensate banking phenomenon which reduces productivity near the wellbore is a typical feature of gas reservoir, especially condensate rich gas reservoir. Evaluation of the condensate banking is an important issue from a viewpoint of production profile evaluation because of requirement from market to maintain plateau of production for the project. One of popular techniques to express the condensate baking is local grid refinement (LGR) method applied around each well in the compositional simulator.<br>However, LGR application may not be a preferable option in the feasibility study phase, because more complicated reservoir model requires more calculation time. So, PI multiplier method was introduced without LGR option to keep simplicity of the reservoir model.<br>An investigation of the PI multiplier applied in the coarse grided full field model without LGR to take into account productivity reduction by condensate baking has been presented in this paper.

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