In the process of mining oil field the water recovery with oil and gas

and its water chemical characteristics have important significance to the oil production process and oil and gas reservoir. The p H of the oilfield can provide the anti-acid and alkali index for the column composite material of the oil production process. The salinity can indicate the storage environment of the reservoir. The classification method and the trace element on characteristics of the formation water can indicate the oil and gas preservation environment

and the Shorel’s classification method also has the function of indicating the geological characteristics of the reservoir

thus revealing the physical and chemical characteristics of oil and gas reservoirs.The advantages of these three methods are analyzed to make the relevant reservoir environmental information more reliable in the application and provide the basis for oil and gas exploitation and prediction.