The objective of this work was to investigate the viability of converting existing conventional vertical wells to horizontal wells with multiple transverse fractures in targeted reservoirs. These reservoirs can be characterized as two thin, low permeability layers with no crossflow between them. The productivity of these reservoirs was very limited when producing by conventional vertical wells.

Reservoir simulation was used to evaluate various combinations of transverse fractures in horizontal wells. These results were compared with simulation results for conventional vertical wells, with and without vertical fractures. Only infinite conductivity fractures were considered. Early transient behavior as well as pseudosteady-state behavior were simulated.

The results show that horizontal wells with transverse fractures appear to make production of the targeted reservoirs economically feasible.

It has been shown that the productivity index of horizontal wells with transverse fractures is mainly affected by the distance between the outermost fractures and not by the number of fractures nor the spacing between them. Between fractures perforations has been shown to have negligible effects on increasing the productivity of horizontal wells with transverse fractures in these reservoirs. Decline type curves are presented, for horizontal wells with transverse fractures, for future performance prediction and reserves estimates.

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