list of sources below the horizontal or inclined well oriented along the main maximum horizontal stress is shown in fig2 while the horizontal or inclined well oriented transverse to the main maximum horizontal stress is shown in fig3 when the horizontal or inclined well is made in this manner then slots cavities 4 are made these cavities can be produced by a sand blasting perforator for example ap 6 24 the sand blasting provides ideal opening of the formation does not damage cement or casing and establishes an ideal communication between the well and rock of the formation the reduction of excessive when compared with normal geostatic stresses acting near the well leads to a possibility to increase permeability of productive formation and increase in flow of fluid to the well the formation of the slots or cavities 4 causes redistribution of stresses concentration of stresses around the well is redistributed to the edges of the slots or cavities and a corridor of unloading is formed in direction of the slot or cavity the combination of the above mentioned selection of the direction of making the horizontal or inclined well relative to horizontal stresses with the orientation of the slot shaped cavities increases the productivity of the well along its whole length and for a long time since the horizontal or inclined well has a great length cutting of continuous longitudinal slots is expensive and complicated in the present invention the cavities are made.