西南石油大学学报(自然科学版)

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Research of Injection-production System Seepage Field Characteristics
and Well Spacing Optimization in Bohai M Oilfield

Wang Liqun1, Huang Kai1, Deng Qi1, Lü Dongliang2   

  1. 1. Tianjin Branch,China National Offshore Oil(China)Co. Ltd,Tanggu,Tianjin 300452,China
    2. School of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2013-10-20 Published:2013-10-20

Abstract:

Aimed at the lacks of the related theory and experience about horizontal well development Bohai conventional thin
oilfields. The four typical horizontal well injection-production systemswere studied with the conformal transforation and potential
superposition principle:one vertical well injection and one horizontal well production(I),one horizontal well injection and
one horizontal well production(II),one vertical well injection and two horizontal wells production(III),and one horizontal
well injection and two horizontal wells production(IV)in M Oilfield,we established the potential field equation,the corresponding
dimensionless productivity equation,and draw the equipotential line maps & dimensionless production change chart
by conformal mapping and potential superposition principle. Theoretical analysis results show that:the production of I~III
injection-production system is the most when producing wells directly face injecting wells. Nevertheless the production of IV
injection-production system is the most of them when horizontal well spacing staggers,and the optimum distance is 0.5~1.0
times the half length of horizontal segment while injector-producer spacing equals the length of actual horizontal section. The
oilfield application instances indicate that analysis results of theoretical production are consistent with the real production.

Key words: horizontal well, injection-production system, potential field, seepage flow characteristics, production