1. Improve the temperature and salt resistance of the product
As the development of oilfields in eastern China becomes more difficult, the geological conditions of the oil reservoirs used are becoming more and more complicated, mainly manifested by high formation temperature and high formation salinity. The geological reserves of the Shengli Oilfield with high temperature and high salinity have reached Shengli Oilfield through statistics. 43%, and due to technical limitations, it has not been effectively developed. At the same time, Sinopec, CNOOC, and China National Petroleum Corporation are actively engaged in offshore oil production, and have put forward higher requirements for the salt tolerance of polyacrylamide. Therefore, to further improve the temperature and salt resistance of the products, there is an urgent need to stabilize the output of the old oilfields in the east, especially the Shengli Oilfield, and reduce the development cost.
2. Improve the dissolution rate of the product, especially the dissolution rate in salt water
At present, the oilfield polymer injection process generally adopts clean water dissolution and sewage injection process. By increasing the dissolution rate of the product, it can reduce the investment of polymer injection equipment, reduce the oilfield’s demand for clean water, and reduce production costs; reduce the discharge of produced fluids and reduce Environmental pollution; at the same time, due to the lack of offshore fresh water and relatively limited platforms for offshore oilfield polymers, it is more necessary to increase the dissolution rate in high-concentration salt water.
3. Research on the synthesis of viscoelastic polymers
Through the accumulation of polymer flooding experience in Shengli Oilfield for many years, it is believed that: 1. The one-sided pursuit of high viscosity and high molecular weight may not necessarily adapt to reservoir conditions during oil recovery; 2. The oil displacement effect of polymer flooding fluid is mainly manifested in increasing the swept volume. , But it also has a microscopic oil displacement effect. Therefore, studying and improving the rheological properties of polymer solutions, improving the viscoelasticity of polymers, and enhancing the oil displacement effect of polymers are one of the main directions of polymer synthesis research in the future.
4. Strengthen the research on the compatibility of the product and other oil-displacing agents
With the development of polymer flooding, technologies such as binary combination flooding and ternary combination flooding have been gradually adopted. Polymers, surfactants, and other oil displacements are increasingly used in combination to deepen the synergy of oil displacement agents. Research to improve the compatibility of products and put forward higher requirements for product performance.