A Regression Analysis Approach to Van Everdingen-Hurst Dimensionless Water Influx Variables for Infinite and Finite Aquifers

Muhammad Taufiq Fathaddin (Universitas Trisakti)
Yarra Sutadiwiria (Universitas Trisakti)
Taufan Marhaendrajana (Institut Teknologi Bandung)
Sonny Irawan (Kabanbay batyr Ave., Astana, Kazakhstan)
Onnie Ridaliani Prapansya (Universitas Trisakti)
Asri Nugrahanti (Universitas Trisakti)

Scientific Contributions Oil and Gas
Vol 47 No 1 (2024)

Water influx calculations have relied on accurate values of the Van Everdingen-Hurst WeD dimensionless variables. For programming and hand calculators, equations are needed to determine WeD. Previous models provide equations for WeD calculations for infinite aquifer cases. This paper presents two sets of regression equations that are simple to apply to obtain accurate values of WeD for either infinite or finite aquifer cases. The proposed equations have good agreement with the Van Everdingen-Hurst method with an average difference of 0.77% and 1.18% for the cases of infinite aquifer and finite aquifer, respectively