白狼城油田长2水驱储层变化规律及对油田开发的影响  

Changes in the Chang 2 Water Drive Reservoir of Bailangcheng Oilfield and Their Impact on Oilfield Development

作　　者：宁涛[1] 刘磊峰 张志春 王晓辉[1] NING Tao;LIU Leifeng;ZHANG Zhichun;WANG Xiaohui(Water Injection project Area Management Headquarters,Yanchang Oilfield Co.,Ltd.,Yan'an 716000,China)

机构地区：[1]延长油田股份有限公司注水项目区管理指挥部,陕西延安716000

出　　处：《西安文理学院学报(自然科学版)》2025年第1期38-44,共7页Journal of Xi’an University(Natural Science Edition)

摘　　要：白狼城油田是延长油田注水开发最早的一批油田,近年来含水逐步上升,技改挖潜难度增大,深层次地开展水驱储层方面的试验研究能够更好地指导油田后期注水开发.通过注水前后邻井同层位储层取心,以铸体薄片、扫描电镜、水驱油实验、试采数据等手段综合研究注水前后储层特征的变化规律以及对注水开发的影响,以便调整注水开发策略,确保后续精细注水开发顺利开展.通过研究发现水驱后相渗曲线整体明显向左偏移,储层两相共流范围变窄,说明油区已形成局部注水通道,在后期的开发中应更注重顺物源方向油水井参数调控,同时应注意水井注入量不应高于其井控范围内孔隙总体积的5倍,否则容易造成水淹水窜,同时增加注水成本,在物性较差的井区应注意注入水堵塞孔喉影响开发效果.The Bailangcheng Oilfield is one of the earlier oilfields developed by water injection in the Yanchang Oilfield.In recent years,the water content has gradually increased,and the difficulty of technical transformation and potential exploration has increased.Conducting indepth experimental research on waterdriven reservoirs can better guide the subsequent water injection development in the oilfield.By taking cores from adjacent wells and reservoirs at the same layer before and after water injection,the changes in reservoir characteristics before and after water injection,as well as their impact on water injection development,are comprehensively studied through methods such as casting thin sections,scanning electron microscopy,water flooding oil experiments,and trialing production data,in order to adjust the water injection development strategy and ensure the smooth implementation of subsequent fine water injection operation.Through this study,it was found that the overall permeability curve after water flooding deviates significantly to the left,and the range of two-phase co flow in the reservoir becomes narrower,indicating that a local water injection channel has formed in the oil area.In future development,more attention should be paid to adjusting oil and water well parameters in the direction of the material source.At the same time,it should be noted that the injection volume of the water well should not exceed five times the total pore volume within the well control range,otherwise it is easy to cause water flooding and water channeling,and increase the cost of water injection.In areas with poor physical properties,attention should be paid to the blockage of the pore throat by injection water,which can negatively impact development effectiveness.

关 键 词：低渗透油藏 水驱规律 储层特征 开发调整 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]