Automatic Liquid Level Monitoring Technology And Its Research On The Pressure Recovery Test In Oil And Gas Field

Formation pressure is an important parameter in reservoir dynamic analysis, which can provide basis for reservoir evaluation, decision making, effect evaluation, fine description and reserves estimation. Bottom hole pressure is an essential method for analyzing oil well production. The most accurate method of obtaining bottom hole pressure is directly under the pressure gauge, but the pressure test is limited. It can be used for eccentric wellhead. It is difficult to measure bottom hole pressure.This paper aims to solve the pumping oil pumping well liquid level test data transformation problems of bottom hole pressure calculation method. Through the comprehensive analysis of domestic and international level conversion bottomhole pressure method and application effect of, including the commonly used method, three section method. According to the distribution characteristics of fluid temperature and pressure, a new method is established to calculate the variation of fluid properties with temperature and pressure in the wellbore, and the results of the test data are used to measure the pressure at the same time. The results show that the relative error and absolute error of the newly established bottom hole pressure conversion method are significantly less than the two section and the three section method, which verifies the correctness, stability and reliability of the proposed method.