摘要
聚合物驱在混合提高采收率(EOR)中发挥着重要作用。低矿化度聚合物驱(LSPF)的聚合物对盐水p H非常敏感。实验研究了酸性碳酸盐岩油藏中不同盐度和硫酸盐离子(SO_(4)^(2-))质量浓度的影响。结果表明:矿化度越低,聚合物的稳定性越好,聚合物吸附越少,润湿性变化越大,最终采收率越高。然而,当注入的液体中没有含有足量的硫酸盐离子,低盐度可能不适合LSPF。聚合物效率分析结果表明,在聚合物质量浓度相同的条件下,通过调整SO_(4)^(2-)的质量浓度可以获得更高的产油量。
Polymer drive plays an important role in hybrid enhanced recovery(EOR).The polymer of low mineralization polymer drive(LSPF)is very sensitive to brine pH.In this study,the effects of different salinity and mass concentration in sour carbonate reservoirs were experimentally investigated.The results showed that the lower the mineralization,the better the polymer stability,the less polymer adsorption,the greater the change in wettability,and the higher the final recovery.However,the injected fluid did not contain sufficient amount of sulfate ions(),and the low salinity may not be suitable for LSPF.The polymer efficiency analysis showed that higher oil production could be obtained by adjusting the mass concentration of under the same condition of polymer mass concentration.
作者
郑志刚
豆涛涛
刘涛
李治杰
ZHENG Zhigang;DOU Taotao;LIU Tao;LI Zhijie(PetroChina Changqing Oilfield Branch No.10 Oil Production Plant,Qingyang Gansu 745100,China)
出处
《当代化工》
CAS
2024年第8期1886-1890,共5页
Contemporary Chemical Industry
基金
中国石油天然气基础研究计划项目(项目编号:2022KW-2512)。
关键词
提高采收率
聚合物驱
吸附性
稳定性
Enhanced recovery
Polymer drive
Adsorption
Stability
