Unconventional reservoirs, due to their complexity, are among the greatest challenges to the oil and gas industry. After years of research, shale gas and tight gas reservoirs are now proven to be one of the unconventional reservoirs that are economically viable to fulfill the crucial energy requirements. Due to their low permeability and several other factors, they require advance techniques on both operational and simulation fronts.

We performed several different simulations, both numerical and analytical, covering a variety of scenarios to compare shale gas and tight gas production forecasts. Both vertical and horizontal completions were analyzed. For horizontal completions, different hydraulic fracturing stage density was evaluated to identify the best possible production profile for a well and the entire field. The simulations show that Langmuir pressure, volume, rock density, well spacing, completion type, lateral length, and reservoir thickness have a large effect on production forecasts as well as simulations. The simulation results also show the effect of permeability in different cases. The aforementioned are key factors in development plan for a shale gas asset. All the values used for forecasting, both numerical and analytical, are typical for worldwide shales and belong to open source data. They have been selected carefully due to their close resemblance to unconventional reservoirs in Pakistan.

You can access this article if you purchase or spend a download.