Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (1): 117-120.doi: 10.3969/j.issn.1673-8926.2012.01.023

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Study on calculation of dynamic reserves and water influx in fractured condensate gas reservoir

CHEN Heng1， DU Jianfen1， GUO Ping1， LIU Donghua1， XIAO Feng2， YANG Zuoming3   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China； 2. No.1 Oil Production Plant， PetroChina Changqing Oilfield Company， Yan’an 716000， China； 3. Research Institute of Exploration and Development， PetroChina Xinjiang Oilfield Company， Karamay 834000， China
  • Online:2012-02-20 Published:2012-02-20

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Abstract:

Based on the principle of material balance, combined with the compressibility and irreducible water saturation differences between the matrix and fracture system, a new material balance equation for fractured gas condensate reservoir with low condensate oil content and active edge and bottom water was established. Moreover, a simple method of calculating dynamic reserves and water influx of fractured condensate gas reservoir was put forward by introducing elastic storativity ratio. A case study shows that the OGIP and water influx were too lager if calculated by using apparent formation pressure method and depending on the geological reserves method considering only the single porosity media. Therefore, the new material balance equation could calculate the OGIP and water influx more accurately due to considering double porosity media.

Key words: stratigraphic sequence, sedimentary cycle, maximum entropy spectrum estimation, prediction error, trend curve

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