Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (5): 134-139.doi: 10.3969/j.issn.1673-8926.2017.05.016

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Productivity prediction method of shallow reservoir inWeibei Oilfield

CHEN Mingqiang1, WANG Ning1, ZHANG Yang2, REN Long1   

  1. 1. College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, China;
    2. No. 1 Gas Production Plant, North China Oil and Gas Company, Sinopec, Zhengzhou 450000, China
  • Received:2017-04-06 Revised:2017-05-12 Online:2017-09-21 Published:2017-09-21

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Abstract: Natural fractures have great influences on the productivity of oil wells in shallow and low permeability reservoir in Weibei Oilfield. Based on the percolation theory and fractal theory,the permeability of natural fractures was characterized by introducing fractal dimension and analyzing the development degree of natural fractures influences of the specific productivity index per-meter in shallow reservoir of Weibei Oilfield,and a productivity forecast mathematical model of vertically fractured well was established in low permeability and fractured reservoir to reveals the productivity characteristics. The results show that the permeability of the low permeability reservoir is improved effectively by natural fractures,and the productivity of the oil wells is almost increased exponentially along with the development degree of the natural fractures after fracturing. Consequently,enlarging the fracturing scale appropriately can greatly improve the productivity in natural fracture development zones when reforming the shallow reservoir. Meanwhile,it's the best to minimize the damage and pollution to the natural fractures. The results have a certain reference value for the rational development of similar reservoirs.

Key words: seismic post-stack data, Contourlet transform, image enhancement, small-scale faults, fracture prediction

CLC Number: 

  • TE35
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