The determination of the reasonable casing pressure value in high gas-oil ratio rod pump wells

In the process of high gas-oil ratio pumping wells production, the casing pressure value affect production of oil wells. When it is too high or low, the output will be less or the water content will increase quicker and affect the final recovery efficiency. Because there is a linear relationship between the casing pressure and the gas-oil ratio and water cut, relevant mathematical model can be setup by multiple element linear regression theory. The final similar relationship of the casing pressure and the crude output can be obtained by the data least square curve-fitting method, thus the liquid producing capacity can be changed by controlling casing pressure. The test result show that this method is simple and easy, the result is better after applied on site, it can provide the theoretical criteria for oil well production management.