Integrated Separate Layer Injection Technology on Water-Polymer Full Term Flooding for II and III Kind Formation

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Li, Kuilong^1 ; Xu, Dekui^1 ; Zhou, Wanfu^1 ; Ma, Junzhe^1 ; Liu, Chongjiang^1 ; Song, Xingliang^1 ; Han, Yu^1 ; Qiu, Yadong^1 ; Wang, Chaoyi^1 ; Wu, Kan^1 ; Tang, Jundong^1

Production and Engineering Research Institute Daqing Oilfield Limited Liability Company, Heilongjiang Daqing

163453, China^1

关键词: Daqing oilfields;    Field application;    High viscosities;    Injection technology;    Low permeability;    Molecular weight regulators;    Polymer flooding;    Polymer injection;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042030/pdf
DOI  :  10.1088/1755-1315/310/4/042030

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

With the development of polymer flooding in Daqing oilfield, the II and III formation with low permeability and apparent interlamination contradictory has been developed for the main target. Due to the big difficulty of testing, the low successful ratio of running and fishing, the high cost of changing the strings for water flooding and polymer flooding, the original separate layer polymer injection failed to be applicated extensively. In order to resolve the problems mentioned above, the integrated separate layer injection technology on polymer flooding was researched in this paper. The eccentric injection regulator, the pressure regulator with low viscosity loss ratio and high pressure choke, the molecular weight regulator with high viscosity loss ratio and low pressure loss are designed, the injetion of high permeable interval and the molecular weight of medium and low permeable interval can be controlled at the same time. The separate injection string is compatible with water flooding technology and it can be satisfied the requirement of the blank water flooding, polymer flooding and sequent water flooding, the investment and operation cost are dropped. The field application of more than 1000injection wells show that the empoly degree of the II and III kind formation is improved obviously and the rude oil revovery enhanced 2 percent above after using the new style separated injection technology.