With the development of our economy and society, the growing demand for energy is huge. But the majority of our oil field has several decades of development, a gradual decline in production, increasing the difficulty of exploitation. Therefore, secondary recovery or tertiary oil recovery has been ca

As economic and social development of our country, the demand for energy. But most of our oil fields have already been several 10 step-by-step the development, production, and exploitation in difficulty. So, 2 times 3 times and even oil extraction has been known as the oil fields of the increase rat

Along with our country economic society development, is day by day huge to the energy demand.But our country most oil fields passed through the dozens of year development, the output drop gradually, mining difficulty enlarge.Therefore, two extraction three extractions has even been called various oi

As China's economic and social development, demand for energy is growing huge. But most of the oil fields in China have had decades of development, production gradually declined, mining difficulties. Therefore, secondary and even tertiary oil recovery has been referred to as the primary method of oi

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