Table 3 Productivity equation summary table.
Phase | Productivity equation | Non-resistance flow /(104m3/d) | |||
|---|---|---|---|---|---|
Gas test stage | Binomial | Pressure squared | \({p}_{R}^{2}-{p}_{wf}^{2}=0.00091q+1.68\times 1{0}^{-11}{q}^{2}\) | 499 | |
Quasi-pressure | \({\varphi }_{R}^{2}-{\varphi }_{wf}^{2}=0.0158q+1.23\times 1{0}^{-9}{q}^{2}\) | 645 | |||
Exponential type | Pressure squared | \({q}_{sc}=1613.45\times ({p}_{R}^{2}-{p}_{wf}^{2}{)}^{0.9397}\) | 481 | ||
Quasi-pressure | \({q}_{sc}=160.88\times ({\varphi }_{R}^{2}-{\varphi }_{wf}^{2}{)}^{0.8948}\) | 704 | |||
One-point method | \({Q}_{AOF}=\frac{6qg}{\sqrt{1+48(\frac{{p}_{e}^{2}-{p}_{wf}^{2}}{{p}_{e}^{2}})}-1)}\) | 217 | |||
235 | |||||
256 | |||||
382 | |||||
Productivity test period | Test mining process | One-point method | Initial production | 366 | |
2023.1 | 341 | ||||
Stable point productivity binomial method | Initial production | \({p}_{R}^{2}-{p}_{wf}^{2}=7.53q+6.54\times 1{0}^{-6}{q}^{2}\) | 661 | ||
2023.1 | 638 | ||||
Current forecast | Binomial | Pressure squared | / | 339 | |
Quasi-pressure | \({\varphi }_{R}^{2}-{\varphi }_{wf}^{2}=0.03166q+1.82\times 1{0}^{-9}{q}^{2}\) | 405 | |||
Exponential type | Pressure squared | / | 299 | ||
Quasi-pressure | \({q}_{sc}=40.68\times ({\varphi }_{R}^{2}-{\varphi }_{wf}^{2}{)}^{0.9707}\) | 453 | |||
Recommend | \({\varphi }_{R}^{2}-{\varphi }_{wf}^{2}=0.03166q+1.82\times 1{0}^{-9}{q}^{2}\) | 405 | |||
