Determination of the input parameters of the working stream of the oil-gas jet pump operated simultaneously with the sucker-rod pump

  • Olga Dubei ІФНТУНГ
Keywords: oil well; jet pump; thermobaric parameters; gas-liquid mixture; tandem installation

Abstract

In order to calculate the operating mode of a sucker-rod pump driven by the beam pumping unit and a jet pump during their simultaneous operation, pressure and temperature distribution along the wellbore from the bottom to the wellhead was determined for the real oil well 753-D "Dolynanaftogaz" Field Office. Herein an improved methodology of calculating these parameters is used, which is based on known methods of Poettman-Carpenter and Baxendel. As a result, the imperfection of these methods was eliminated, namely the assumption that the characteristic of the pressure and temperature changing along the wellbore is linear. This led to obtaining more accurate results mainly for pressure values ​​up to 23%. In addition, using the algorithm for determining the density of an ideal gas-liquid mixture, the calculation of the gas-water-oil and water-oil mixtures’ velocities was conducted for a number of sections along the production tubing at different angles of the crank’s position in the beam pumping unit. The indicated values ​​make it possible to determine the location depth of the oil-gas jet pump in the well, and, consequently, the parameters at its input (pressure, temperature, velocity of the gas-liquid mixture, its density, etc.). Besides that, dependences, which describe the change in the density of the gas-liquid mixture along the wellbore, were obtained, as well as the relations between density of the free oil gas, the consumption gas content and the placement of the cross-section being considered. All of the above-mentioned algorithms were implemented using developed computer programs. The obtained results allow us to estimate the most advantageous location of the jet pump in the well to ensure that they maximize the pressure gain and reduce the load on the stem.

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Published
2019-03-29
How to Cite
Dubei, O. (2019). Determination of the input parameters of the working stream of the oil-gas jet pump operated simultaneously with the sucker-rod pump. Prospecting and Development of Oil and Gas Fields, (1(70), 60-69. https://doi.org/10.31471/1993-9973-2019-1(70)-60-69