渤中34-1油田稳产挖潜与对策

Tapping the potential countermeasures for stabilized production in Bozhong 34-1 Oilfield

渤中34-1油田为复杂河流相油藏,以3%以上采油速度实现连续5年稳产高效开发。目前随着油藏含水上升,油田已进入中含水生产阶段,老井产量递减趋势加大,同时由于河流相非均质性影响,尤其受地震资料及测试资料少限制,剩余油分布复杂,油藏潜力认识不清,调整挖潜难度大,导致稳产难度加大。该文对于缺乏资料认识的区域,探索用流压与产量压降试井等方法落实储量潜力;对于油藏认识程度较高区域,采用油藏优势动用潜力丰度评价等方法对剩余油进行定量表征,同时开展精细注水研究,优选注入压力,提高单井注水效率;通过对储量潜力的系统研究,为下步调整提供科学依据,也为海上类似油藏开发提供了借鉴。

Bozhong 34-1 Oilfield is a complex fluvial facies reservoir,the oil recovery rate has been achieved stable and highly efficient development at 3% or more for five consecutive years.At present,with the increase of reservoir water content,the oilfield has entered the middle water-bearing production stage,the production decline of old wells increases.Due to the effects of fluvial facies heterogeneity,especially the restrictions of less seismic and test data and complex residual oil distribution,the reservoir potential is not clear,it is difficult to adjust potentials and stabilize production.For the areas of lacking information,the paper explored to use the methods of flowing pressure and production draw-down test to implement reserves potential,and for the areas with high reservoir recognition,the abundance evaluation of the dominant reservoir potential was used to quantitatively characterize the remaining oil.Meanwhile,carry out fine water injection study,optimize the injection pressure,improve the efficiency of single-well water injection.Studying the potential not only provides a scientific basis for the next adjustment but also provides a reference for similar offshore reservoir development.