西南石油大学学报(自然科学版)

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Calculation Method of Development Indexes for Multilayered Reservoir
with Starting Pressure Included

Feng Qihong1*, Wang Shoulei2, Han Xiaodong3, Bai Junwei4   

  1. 1. School of Petroleum Engineering,China University of Petroleum,Qingdao,Shandong 266555,China
    2. CNOOC Research Institute,Chaoyang,Beijing 100028,China
    3. Tianjin Branch Company,CNOOC,Tanggu,Tianjin 300452,China
    4. Shengli Branch Company,SINOPEC,Dongying,Shandong 257051,China
  • Online:2015-04-01 Published:2015-04-01

Abstract:

Now,many of the prediction methods of development indexes are suitable for the middle-high permeability oilfield,
which does not consider the effect of the starting pressure. In this paper,based on the model of the multilayered non-piston
water flooding reservoirs,and considering the impact of the starting pressure,he calculating method of the development indexes
in the constant flowrate production was derived. During commingling production,each layer of different permeability has
different production pressure drop and low permeability layer shows bad fluid supply capacity due to the effect of starting pressure.
A set of predicting method for constant flowrate production which can reflect the objective reality have been derived and
verified with field examples. Results show that,due to the change of water and oil seepage resistance in commingling production,
the production pressure drop decrease gradually,and the fluid production ratio of high permeability layer is increasingly
greater,which intensifies interlayer interference. This method reflects accurately the characteristics of reservoir production.
The feasibility of the method is confirmed theoretically and practically.

Key words: multilayered reservoirs, development index, starting pressure, accumulative injection pore volume factor, interlayer
interference