Study on Influence Factors and Governance Countermeasures of Movable Gel Prepared with Backfilling Waste Water

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Gao, Shanshan^1 ; Zhang, Jianzhong^2 ; Zhang, Tiantian^1 ; Cui, Yanjie^1 ; Wang, Zhiqiang^1 ; Sun, Xinrui^3 ; Li, Jing^3 ; Zhang, Lianchao^3

Petroleum Production Engineering Research Institute of PetroChina Huabei Oilfield Company, Renqiu, Hebei, China^1

Erlian Filiale of Huabei Oilfield Company, Xilinhaote, Neimeng, China^2

Fifth Exploit Factory of PetroChina Huabei Oilfield Company, Xinji, Hebei, China^3

关键词: Development trends;    Formation temperature;    Huabei oilfield;    Polymer concentrations;    Poor stability;    Profile control;    Tertiary oil recovery;    Treatment measures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/6/062074/pdf
DOI  :  10.1088/1755-1315/153/6/062074

来源: IOP

【 摘 要 】

Movable gel as profile control and flooding is one of the main measures in tertiary oil recovery in Huabei Oilfield. Many blocks have tight fresh water supplies, but produced waste water can not be discharged. Therefore, preparing movable gel with backfilling waste water has become an inevitable development trend of profile control and flooding. Three different quality of sewage water named SW, YW and ZW were used to prepare gel and then compared with gel prepared clean water. The results showed that the gel viscosity prepared with clean water was 1.5-5.6 times of sewage water at the same formula concentration. For this reason, the effect of Na+, Ca2+, Fe2+ on the gel performance were analyzed. The above ions lead to a decrease in the gel viscosity and poor stability, which can not even be crosslinked. According to the sewage water characteristics, corresponding treatment measures were developed respectively. The best treatment of SW and ZW was increasing polymer concentration followed by the addition of thiourea. The best treatment of YW was also increasing polymer concentration followed by stirring and aeration. The gel viscosity reached to 1800-2500mPa⋅s and maintained at 800-1200mPa⋅s after 90 days at formation temperature. It showed that the treatment can effectively improve the gel viscosity and stability prepared with sewage water. The results provide valuable experiences for the preparation of movable gel with different quality waste water.