低渗透油藏注气提高采收率评价
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摘要
针对低渗透油藏注气提高采收率,结合实际案例进行了评价。从实践效果来说,对于低渗透和特低渗透油藏,注入二氧化碳或者氮气用于提高原油采收率,能够获得不错的效果,但缺少成熟度高并且可靠性强的高压注气技术。套管长期带压注气存在着很大的井控风险,需积极创新注气技术,引入新技术和新设备,保证注气驱动采收率提高的效果。
The oil recovery in low permeability reservoirs is enhanced and combined with actual cases.In terms of practical effects,for low-permeability and ultra-low-permeability reservoirs,injecting carbon dioxide or nitrogen for enhanced oil recovery can achieve good results.However,due to the lack of high-precision and high-reliability high-pressure gas injection technology in the industry,there is a large risk of well control for long-term pressurized gas injection in casings.It is necessary to actively innovate gas injection technology and introduce new technologies and equipment to ensure The effect of gas injection driving recovery is improved.
The oil recovery in low permeability reservoirs is enhanced and combined with actual cases.In terms of practical effects,for low-permeability and ultra-low-permeability reservoirs,injecting carbon dioxide or nitrogen for enhanced oil recovery can achieve good results.However,due to the lack of high-precision and high-reliability high-pressure gas injection technology in the industry,there is a large risk of well control for long-term pressurized gas injection in casings.It is necessary to actively innovate gas injection technology and introduce new technologies and equipment to ensure The effect of gas injection driving recovery is improved.
引文
[1]张娟.陕北W油区延长组长4+5油藏注CO2驱油气窜规律研究及注气方式优选[D].西安:西北大学,2018.
[2]侯志.低渗透油藏聚合物驱注入性以及有效性研究[D].成都:西南石油大学,2018.
[3]张谦伟.二氧化碳-氮气混合气体与原油最小混相压力研究[D].大庆:东北石油大学,2018.
[2]侯志.低渗透油藏聚合物驱注入性以及有效性研究[D].成都:西南石油大学,2018.
[3]张谦伟.二氧化碳-氮气混合气体与原油最小混相压力研究[D].大庆:东北石油大学,2018.