Gas reservoir water-producing gas well parameter prediction method and device, electronic equipment and medium

Abstract

The invention discloses a gas reservoir water-producing gas well parameter prediction method and device, electronic equipment and a medium. The method comprises the following steps: calculating the relative permeability of a water phase and a gas phase; establishing an equivalent phase seepage equation of a water phase and a gas phase, and further determining an equivalent phase Blasingame yield analysis chart; calculating equivalent phase material balance quasi-time and equivalent phase regularized yield related parameters, and drawing a relation curve between the equivalent phase regularized yield related parameters and the material balance quasi-time; the relation curve is fitted in an equivalent phase Blasingame yield analysis chart, and a fitting value is determined; and gas well parameters are calculated through the fitting values. According to the method, dynamic analysis of the water-producing gas well is achieved, the result obtained through fitting better conforms to the actual stratum and production condition, and the method is easy to operate, fast in parameter obtaining and high in practicability.

Description

technical field [0001] The invention relates to the field of oil and gas field development, and more specifically, to a method, device, electronic equipment and medium for predicting parameters of water-producing gas wells in gas reservoirs. Background technique [0002] With the gradual development of oil and gas fields to unconventional gas reservoirs, the research on water-bearing gas reservoirs has gradually increased. For gas reservoirs with high movable water saturation, formation water is also produced during gas well production, presenting gas-water two-phase flow in gas wells. For the development of such water-bearing gas reservoirs, there will be large errors in the parameter evaluation using the modern production decline analysis method of conventional single-phase gas wells, so the research on the dynamic parameters of water-producing gas wells and the quantitative evaluation methods of reservoir parameters are very important for the development of such gas reser...

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Problems solved by technology

If the water body impact stage curve of the production data cannot be reasonably divided, there will be large errors in the evaluation results

At the same time, this method cannot evaluate reservoirs with high movable water saturation, that is, reservoirs containing movable formation water. At this time, the gas well has been in the stage of formation water influence of two-phase flow from the beginning of production, so this method cannot be used for evaluation

[0014] (3) The modern production decline analysis method of gas-water two-phase flow: the research on gas-water two-phase flow mostly focuses on the material balance method of two-phase flow flow. Evaluation of other reservoir parameters and gas well parameters

Moreover, most of the only pattern matching methods are pattern fitting methods for dealing with pressure, and there are few pattern fitting methods for output.

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