METHOD FOR DETERMINING SATURATION PRESSURE OF PRODUCED PRODUCT WITH GAS Russian patent published in 2021 - IPC E21B47/10 G01L9/00 E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, in particular to methods for determining the saturation pressure of oil with gas in downhole conditions. The method includes measuring the pressure of the liquid and the gas factor, determining by comparing these indicators of the saturation pressure of the produced product with gas. Data collection is carried out at all production wells of the formation in the selected area of the field, and pressure sensors are additionally equipped with gas analyzers located in the same interval of each well to determine the value of the gas factor in the produced product. The curves of the GOR change from the reservoir pressure are recorded after the start-up of each well in linear and nonlinear modes of oil inflow above and below the saturation pressure with the construction of a graph of dependences, on which two averaged straight lines are plotted, one - in the area of nonlinear modes according to maximum values, and the second - on the section of linear modes by minimum values, obtaining the point of intersection of these straight lines. The coordinates of this point show the saturation pressure of the produced product with gas and the corresponding gas factor, respectively, taking into account the measurement errors of the selected equipment.

EFFECT: invention increases accuracy of measuring the saturation pressure of the product with gas in downhole conditions by analyzing the gas-oil ratio and pressure in the well in one place and simultaneously with the subsequent comparison and analysis of the data obtained.

1 cl, 1 dwg