Patent ID: 9045978
Filing Date: 2015-06-02
Classification: E21B

Abstract:
1. A method of increasing productivity of oil, gas or water wells, comprising the steps of excavating of a horizontal or inclined wall; forming in the horizontal or inclined well a plurality of cavities which extend transversely to a direction of elongation of the horizontal or inclined well and are spaced from one another in the direction of elongation of the horizontal or inclined well so as to form a plurality of partitions therebetween; and executing hydrocracking by acting onto the partitions located between the cavities inside the horizontal or inclined well, making the cavities as disc-shaped cavities which redistribute stresses in a rock so that a concentration of stresses around the horizontal or inclined wall is substantially removed and directed to edges of the disc-shaped cavities; and forming the disc-shaped cavities so that the partitions between them have a length l corresponding to the following equation: where σ σ d is a diameter of well (cm), k=0.5-5.0 depending on geological conditions.