Research on Fracturing Effect of the Second Kind of Oil Layer Weak Alkali Ternary Composite Flooding

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Shuxia^1

Daqing Oilfield Co., Ltd., Third Oil Production Plant Test Brigade, Daqing

163000, China^1

关键词: Chemical flooding;    Effective thickness;    Formation pressure;    Precipitation effects;    Production wells;    Saturation pressure;    second oil layer;    Ternary composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022107/pdf
DOI  :  10.1088/1755-1315/300/2/022107

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The main reason for the low production of oil wells in the second type of oil wells is the poor development of the oil layer itself and the near-wellbore pollution caused by the scaling of the ternary composite system. By analyzing the dynamic and static factors affecting the fracturing of the production well, it is known that the fracturing effect is better when the formation pressure is higher than the saturation pressure after fracturing; the effective thickness is greater than 5 m, the first type of connectivity is greater than 30%, and the high water flooding thickness ratio is less than 40%, production liquids with a drop of more than 20%, a water cut of more than 5%, and a chemical flooding degree of less than 15% can achieve better oil and precipitation effects. For the weak alkali ternary composite flooding type II oil layer with permeability greater than 100×10-3μm2, the conductivity of fracturing has little effect on the fracturing effect, and the fracturing timing is the key factor to determine the fracturing effect.