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采用长岩心流动试验装置研究了自行研制的IPNG颗粒溶液调驱剂在多孔介质中的运移模式、在注入过程中岩心各测压点的压力变化规律以及岩心各段的残余阻力变化规律;采用并联岩心流动试验装置研究了IPNG颗粒溶液调驱剂在高低渗透层的选择性进入能力。结果表明,IPNG颗粒在多孔介质中通常有顺利通过、破碎通过、堵塞喉道3种运移模式,对应的IPNG颗粒粒径分别为粒径/孔喉<4、4<粒径/孔喉<6时、粒径/孔喉>6,在现场施工中应该采用具有破碎通过模式的凝胶颗粒。IPNG颗粒溶液调驱剂在高低渗透层具有良好的选择性进入能力。在注入过程中实际进入低渗层的颗粒溶液调驱剂很少,而且进入低渗层的颗粒只在入口端很短的距离。IPNG颗粒溶液调驱技术是一种能治理地层深部大孔道的应用前景广阔的提高采收率技术。
The long core flow test device was used to study the migration modes of self-developed IPNG granule solution in porous media, the variation of pressure at each pressure point during core injection and the variation of residual resistance in each section of core. The parallel core flow test device was used to study the selective penetration ability of IPNG particle solution in high and low permeable layers. The results show that the IPNG particles usually pass through the porous media successfully and break through the throats and block the throats. The corresponding IPNG particles have particle size / pore throat <4, 6, in the field of construction should be used with broken through the pattern of gel particles. IPNG particle solution conditioner has good selective penetration ability in high and low permeable layers. Particulate solutions that actually enter the low-permeability layer during injection are very poor in tuning-control agent, and the particles entering the low-permeability layer are only a short distance from the inlet end. IPNG Particle Solution Flooding Technology is a promising oil recovery technology that can deal with large large pores in deep strata.