Abstract
Engineers need to estimate the expected productivity of horizontal wells. We need to know how long it takes to reach pseudosteady-state to accept that estimation. When all boundaries influence the pressure distribution in the drainage area, then we can say we have reached pseudosteady- state. Reservoir simulation with fine gridblocks has been performed to produce accurate pressure transient responses, and from those results the pseudosteady-state time has been determined. When all boundaries influence the pressure distribution in the drainage area. then a graph of the rate of change of pressure vs time [ ] will exhibit slope equal unity. The equation for pseudosteady-state dimensionless time has been defined properly and tabulated, and plotted values for dimensionless time have been produced with variations in well location, well length, and drainage dimensions with a simulator that has been validated and compared with known results. Most of the horizontal well flow regimes in the literature have been observed and analyzed.
Al-Kahtani, Abdulghafour (1998). The time to reach pseudosteady-state in horizontal wells. Master's thesis, Texas A&M University. Available electronically from
https : / /hdl .handle .net /1969 .1 /ETD -TAMU -1998 -THESIS -A45.