Method for calculating real pressure and reserves of low-permeability gas reservoir by using production data
A technology for production data and gas reserves, applied in the directions of calculation, design optimization/simulation, electrical digital data processing, etc., can solve problems such as failure to represent the stratum, long-term shut-in recovery, and impact on production, etc.
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[0034] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0035] Such as figure 1 As shown, the method for calculating the true pressure and gas reserves of low-permeability gas reservoirs using production data includes the following steps:
[0036] 1. Export the production data information into an execl format file, such as figure 2 shown;
[0037] 2. Input execl related data: casing pressure, daily gas production, cumulative gas production, cumulative water production; use casing pressure to calculate bottomhole flow pressure Pwf;
[0038] 3. Assuming a formation pressure, calculate the formation apparent pressure, and obtain the productivity equation, so as to obtain the corresponding gas reservoi...
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