Quantitative interpretation method for production profile of horizontal gas well

Abstract

The invention discloses a quantitative interpretation method for the production profile of a horizontal gas well. The method comprises the steps of in the position of the first perforation cluster which is close to a pithead, establishing the energy conservation model for the mixing process of the fluid (1) which flows into a wellbore from the position of the first perforation cluster and the fluid (2) which is located in the upstream of the first perforation cluster before mixing; establishing the energy conservation model of the fluid (1) during the gas-liquid mixing process in the position of the first perforation cluster; establishing the energy conservation model of the formation of the well section between two perforation clusters and the fluid in the wellbore, by applying the measured data of temperature, pressure and liquid holdup, calculating the mass flow rate of the natural gas in the fluid (2) and the mass flow rate of the liquid in the fluid (2), calculating the gas production rate and liquid production rate of the perforation cluster of the fluid (1) and the like. According to the quantitative interpretation method for the production profile of the horizontal gas well, the output situation of each perforation cluster of the horizontal gas well is calculated quantitatively by applying the data of temperature, pressure and liquid holdup, and the quantitative interpretation for the production profile of the horizontal gas well is completed by applying the fewest measuring parameters.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a method for quantitatively interpreting the production profile of a horizontal gas well. Background technique [0002] With the development of horizontal well drilling and production technology, horizontal well production has gradually become the main method of gas field development. Horizontal well testing is increasing year by year, while conventional vertical well testing techniques cannot meet the needs of horizontal well testing. In horizontal wells, production logging tools cannot It is lowered into the horizontal well section by its own gravity for testing. At present, the technologies used in the production testing of horizontal wells mainly include tubing transportation, coiled tubing transportation, and tractor transportation. However, since gas well production mostly adopts large-scale fracturing stimulation measures, there are many dril...

AI Technical Summary

Problems solved by technology

[0002] With the development of horizontal well drilling and production technology, horizontal well production has gradually become the main method of gas field development. Horizontal well testing is increasing year by year, while conventional vertical well testing techniques cannot meet the needs of horizontal well testing. In horizontal wells, production logging tools cannot Descend into the horizontal well section by its own gravity for testing

At present, the technologies used in the production testing of horizontal wells mainly include tubing transportation, coiled tubing transportation, and tractor transportation. However, since gas well production mostly adopts large-scale fracturing stimulation measures, there are many drill cuttings and fracturing sand left in the wellbore in the horizontal section. At the same time, the wellbore trajectory of horizontal wells is irregular, which makes it easy for conventional production logging tools to encounter resistance in the horizontal section. The rotameter or probe used to test the output of the horizontal section is easy to wear or sand stuck, and the test success rate is low. Application The special temperature, pressure and liquid holdup tester has a compact structure and no moving parts, so it is easier to measure the long horizontal section of the gas well, but there are few interpretation methods for the production profile using the temperature and pressure profile.

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