Online measuring method for dynamic liquid level under sucker rod oil well

Abstract

An online measuring method for dynamic liquid level under a sucker rod oil well includes the steps of collecting production data in the process of oil pumping of the sucker rod oil well; building functions of the flowing pressure and dynamic liquid level under the sucker rod oil well; solving the functions to get the value of the dynamic liquid level under the sucker rod oil well in a certain area; optimizing parameters to parameters from the functions of the flowing pressure under the sucker rod oil well; collecting the new liquid production capacity of the sucker rod oil well and the surface casing pressure of the sucker rod oil well; going through the procedures of matching in sample database so as to obtain optimal parameters of the current working condition; and assuring the current dynamic liquid level under the sucker rod oil well based on functions of the flowing pressure and dynamic liquid level under the sucker rod oil well. On the basis of measurable production data related to the dynamic liquid level under the sucker rod oil well, functions of the flowing pressure and the dynamic liquid level under the sucker rod oil well are built, and thus the safety, reliability and economic efficiency of the production of the sucker rod oil well can be improved.

Description

technical field [0001] The invention belongs to the technical field of soft measurement and detection, and in particular relates to an online measurement method for dynamic liquid level downhole of a rod pump oil well. Background technique [0002] The dynamic liquid level of the rod pumped well directly reflects the liquid supply situation of the formation and the downhole supply and drainage relationship, and is one of the key data for evaluating and optimizing the adaptability of the oil production process. The existing dynamic liquid level measurement method is generally to install a sound wave measuring device at the wellhead of the oil well, transmit sound waves downhole through manual operation, and then collect echo signals, which are analyzed by technicians to realize the measurement of the dynamic liquid level downhole. [0003] The existing dynamic liquid level measurement method of rod pump oil well needs to install the measuring instrument on the wellhead casing...

AI Technical Summary

Problems solved by technology

[0003] The existing dynamic liquid level measurement method of rod pump oil well needs to install the measuring instrument on the wellhead casing, which will cause pressure leakage and affect the normal production of the oil well; frequent operation of the measuring instrument will reduce the service life of the equipment, and at the same time manually The way of operation also has certain potential safety hazards; in addition, the installation and operation of the measuring device will increase the labor intensity of the workers, and the maintenance of the device will increase the production cost.

Images