大庆油区聚合物驱矿场合理停注聚时机及实施方法  

Reasonable polymer injection stopping-time and methods for polymer flooding in the field of Daqing oilfield

作　　者：张晓芹[1] 关文婷[1] 李霞[1] 谢蕊泽 

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中国石油大庆油田有限责任公司第一采油厂,黑龙江大庆163461

出　　处：《油气地质与采收率》2015年第1期88-92,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"大型油气田及煤层气开发"之"松辽盆地喇;萨;杏高含水率油田提高采收率示范工程"(2008ZX05052);中国石油天然气股份有限公司科技重大专项"大庆油田原油4000万吨持续稳产关键技术研究"(2011E-1207)

摘　　要：为避免矿场聚合物溶液低效、无效循环,合理优化油田化学剂用量,提高吨聚产油量、吨聚增油量等指标值,对大庆油区矿场注聚后期各井组间聚合物用量、综合含水率、采聚质量浓度、增油倍数等开采指标变化规律进行了深入分析.考虑经济效益和地质条件的差异性,确定区块综合含水率为92%时应着手编制停注聚方案,单井综合含水率为94%是合理停注聚时机;对于综合含水率为92%-94%的生产井,可应用采收率提高值和聚合物用量导数曲线与经济界限曲线的交点判定停注聚时机;建立了停层不停井、停井不停站、停站不停区的停注聚实施方法,及时实施停注聚,提高聚合物利用率,改善聚合物驱开发效果.In order to avoid the inefficient or invalid polymer solution cycle,optimize oilfield chemical dosage reasonably,improve oil production and increase oil production per ton of polymer and other parameter values,the change rule of development indexes,including polymer volume,composite water cut,polymer concentration of production and increased multiple of oil,were analyzed thoroughly among each well groups in later polymer injection period in Daqing oilfield. Considering economical benefit and geological condition differences between wells and between layers,the plan of polymer injection should be stopped when the composite water cut of the block is 92%. Polymer injection should be stopped when the composite water cut of single well is 94%. For the producers with composite water cut of 92%-94%,the time of polymer injection stopping can be determined from the intersection point of the three curves:the recovery increment curve,the derivative curve of polymer consumption and the economic limit curve. Polymer injection implementation method was established as'oil layers stop while wells keeping,and wells stop while stations working,and stations stop while blocks working'. On this basis,the utilization rate of polymer and the effect of polymer flooding development will be improved.

关 键 词：聚合物驱 综合含水率 停注聚时机 聚合物驱控制程度 采收率 大庆油区 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]