七东_1低渗砾岩油藏聚合物驱配方设计及应用  

Formula Design and Application of Polymer Flooding in Qidong-1 Conglomerate Reservoir with Low Permeability

作　　者：关丹 娄清香 任豪 阙庭丽 GUAN Dan;LOU Qingxiang;REN Hao;QUE Tingli(Research Institute of Experiment and Detection,Xinjiang Oilfield Branch Company,PetroChina,Karamay,Xinjiang 834000,P R of China)

机构地区：[1]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000

出　　处：《油田化学》2020年第2期287-291,共5页Oilfield Chemistry

摘　　要：为提高砾岩油藏采收率,针对七东1区砾岩低渗储层强非均质性、水驱采出程度低、剩余油饱和度较高等特点,在七东1区实施聚合物驱。通过理论计算、聚合物注入性及流动性分析、天然岩心驱油实验,对聚合物相对分子质量和注入浓度进行了筛选,并在七东1区进行了矿场应用。结果表明,七东1区低渗砾岩储层可注入浓度不高于1000 mg/L、相对分子质量400×10~4以下的聚合物,采收率可提高4%数9%。针对低渗透油藏特点,形成了驱油体系与油藏流体等黏驱替流度控制技术。试验区于2016年1月全面注入相对分子质量为350×10~4、质量浓度为800 mg/L的聚合物溶液。截至2019年2月,聚合物驱阶段产油8.01×10~4t,阶段采出程度14.5%,降水增油效果明显。图6表6参14。In order to improve the recovery factor of conglomerate reservoir,polymer flooding was carried out in Qidong-1 area in view of the strong heterogeneity of low permeability reservoir,low recovery degree of water driving and high residual oil saturation.Through theoretical calculation,polymer injectivity and fluidity analysis,and oil displacement experiment in natural core,the relative molecular weight and injection concentration of polymer were screened.Finally,the polymer flooding was applied in Qidong-1 area.The results showed that the recovery factor of Qidong-1 conglomerate reservoir with low permeability increased by 4%—9%when the polymer concentration was less than 1000 mg/L and the relative molecular weight was less than 400×104.According to the characteristics of low permeability reservoir,the fluidity control technology of equal viscosity displacement such as oil displacement system and reservoir fluid was formed.In the test area,polymer injection was carried out in January 2016,with a relative molecular weight of 350×104 and polymer injection concentration of 800 mg/L.Up to February 2019,the oil production in polymer flooding stage was 8.01×104 t,and the recovery factor was 14.5%.The effect of increasing oil production and decreasing water cut was obvious.

关 键 词：砾岩油藏 低渗透油藏 聚合物驱 采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]