平面非均质油藏水驱模拟实验和剩余油分析  

Water drive simulation experiment and dynamic analysis of plane heterogeneous reservoir

作　　者：耿师江[1] 王明[1] GENG Shijiang;WANG Ming(Research Institute of Petroleum Exploration & Production, Zhongyuan Oilfield Company, SINOPEC, Puyang, Henan 457001, China)

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《中国科技论文》2020年第9期1058-1063,1076,共7页China Sciencepaper

摘　　要：为了探究剩余油的挖掘潜力,立足于濮城油田水驱开发实践,设计制作了“低注高采”和“高注低采”2种大尺度平面非均质组合物理模型,并结合水驱实验探讨了平面非均质油藏中水驱动态、水驱波及规律和水驱压力耗散规律,分析了剩余油形成动力学机制和“低注高采”“高注低采”2种开发模式对水驱开发效果的影响。研究表明:2种水驱模式下不同区域渗流阻力不同,水驱含水上升过程和采出程度差异明显;“低注高采”模式下,由于低渗区渗流阻力较大,压力衰减集中于低渗区,富集大量剩余油,低渗区无水采收率仅为8.64%,含水上升快;“高注低采”模式下,注入水在低渗区驱替能量充足,低渗区采出程度较高,其无水采收率为22.22%,最终采出程度高于“低注高采”的模式;油藏平面非均质性制约着水驱压力衰减过程和分布,对低渗区剩余油形成和驱动有直接关系,“高注低采”模式有利于注入水的均衡运移,为合理的水驱开发模式。In order to study the effective exploitation of remaining oil,based on the practice of water drive development in Pucheng oilfield,two large-scale plane heterogeneous combined physical models of low permeability area,high permeability area,medium permeability area,high permeability area and low permeability area are designed and made.Combined with the water drive experiment,the water drive performance,water drive sweep and water drive pressure dissipation in plane heterogeneous reservoir are discussed.The dynamic mechanism of the formation remaining oil analysis and the influence of two development modes on the development effect of water drive are analyzed.The results show that the seepage resistance is different in different regions of the two water drive models,and the water cut rising process and recovery degree are different obviously.Under the production mode of injection and high permeability area in low permeability area,due to the large seepage resistance in the low permeability area,the pressure attenuation is concentrated in the low permeability area,and a large amount of remaining oil is enriched.The anhydrous recovery rate in the low permeability area is only 8.64%,and the water cut rises rapidly.Under the production mode of injection and low permeability area in high permeability area,the displacement energy of injected water in low permeability area is sufficient,and the recovery degree in low permeability area is higher,its waterless recovery rate is 22.22%,and the final recovery degree is also higher than that in injection and high permeability area in low permeability area.The plane heterogeneity of reservoir restricts the attenuation process and distribution of water drive pressure,which has a direct relationship with the formation and driving of remaining oil in low permeability area.The production mode in high permeability area is conducive to the balanced migration of injected water,which is a reasonable water drive development mode.

关 键 词：平面非均质 大尺度平面非均质组合物理模型 注采方向调整 波及规律 水驱开发 

分 类 号：TE37[石油与天然气工程—油气田开发工程]