TY - JOUR AU - Gomaa, Sayed PY - 2016/11/30 Y2 - 2024/03/29 TI - A new relationship for calculating the exponential integral used for constant-terminal-rate solution of diffusivity equation JF - IJRDO -JOURNAL OF MATHEMATICS JA - m VL - 2 IS - 11 SE - Articles DO - 10.53555/m.v2i11.1619 UR - https://www.ijrdo.org/index.php/m/article/view/1619 SP - 09-26 AB - The constant-terminal-rate solution of diffusivity equation is an integralpart of most transient test analysis techniques, such as with drawdown andpressure buildup analyses. Most of these tests involve producing the well at aconstant flow rate and recording the flowing pressure as a function of time.There are two commonly used forms of the constant-terminal-rate solution:the ER -