Experimental device and method for measuring layered gas production of multilayered gas wells

Abstract

The invention relates to an experimental device and a method for measuring the layered gas production rate of a multilayered gas well. The device includes: a stratum simulator, in which multiple layers of rock cores are stacked, and an airtight partition is arranged between adjacent rock cores, and between the top wall and the bottom wall of the stratum simulator and the corresponding rock cores Deformable gaskets are arranged between them so as to form overburden fluid chambers between the top wall and / or bottom wall and the corresponding gaskets, and a plurality of corresponding rock chambers are arranged on the shell side wall of the formation simulator The measurement gas inlet connected to the core is provided with an overburden fluid inlet connected with the overburden fluid chamber on the bottom wall of the casing of the formation simulator, which extends through the top wall of the formation simulator and the lower end opening extends into the rock core to be tested Under the constant superficial pressure of the measured gas in the core to be tested, the stable gas output from the core to be tested is the gas production rate of the layer of the multi-layer gas production well.

Description

technical field [0001] The invention relates to oil and gas well engineering, in particular to an experimental device for measuring the layered gas production of multi-layered gas wells. The invention also relates to a method for measuring stratified gas production using the experimental device. Background technique [0002] Most of the tight low-permeability gas reservoirs develop multiple sets of reservoirs. In order to increase the gas production of a single well, gas wells often exploit multiple reservoirs at the same time. The simultaneous gas production of multiple underground reservoirs is represented as the output of one wellhead on the surface, but the individual gas production of each reservoir cannot be known. [0003] At present, in most cases, the individual gas production of each reservoir can be measured and calculated through engineering field production logging, and the gas well reservoir model can also be studied through numerical simulation software, so a...

AI Technical Summary

Problems solved by technology

However, the cost of the test operation on the engineering site is relatively high, and it will also cause gas waste and pollute the environment

Numerical simulation software is restricted by the accuracy of the reservoir model of the gas well, and its intuition is poor, making it difficult to accurately calculate the individual gas production of each reservoir in the laboratory

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