METHOD FOR DEVELOPING OIL DEPOSITS Russian patent published in 2023 - IPC E21B43/30 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, namely the development of oil deposits by a joint grid of injection, production and horizontal wells. The method for developing an oil deposit includes a seismic uplift arch, structure strike lines, drilling a prospecting or exploration well on a seismic uplift arch and conducting geophysical studies in it, determining reservoir properties of the formation, saturation of the formation with fluids, water-oil contact boundary - WOC. After determining the reservoir properties of the reservoir, the saturation of the reservoir with fluids, the boundaries of the WOC, the line AB is drawn through the arch of the uplift, the line AB, perpendicular to the strike line of the structure, and the line CD, located along the strike line of the structure, the lengths of the AB and CD lines are measured to the WOC line on the scale of the structural map, then the structure coefficient is calculated by the formula: K_str= L₁/L₂, where L₁ is the length of the CD line, L₂ is the length of the AB line, then the total area of economically viable recoverable oil reserves is calculated for four vertical and one horizontal wells, then a rhombus with diagonals d₁ and d₂ is built , while the lengths of the diagonals d₁ and d₂ are determined by the formulas: , d₂=d₁⋅K_str, where S_rec is the area of economically viable recoverable oil reserves for four vertical and one horizontal wells, K_str is the structure coefficient, as well as the lengths of the diagonals d₁ and d₂ are converted to the map scale, then one vertical injection well is placed at the corners of the rhombus, and in the middle of each side rhombus, a vertical production well is placed, then at the ends of the larger diagonal of the rhombus, circles are built with a radius equal to half the length of the side of the rhombus, then a horizontal production well is placed along the longer diagonal of the rhombus, while the bottomhole and the entrance to the formation of the horizontal production well are located at the points intersection of the diagonal of the rhombus with the circle, then on the structural map any one vertical production well located on the side of the rhombus is combined with the bottom hole point of the drilled exploratory or exploration well, while orienting the trunk of the horizontal production well of the rhombus parallel to the strike line of the structure, passing the first row of rhombuses is drawn along the strike line of the structure to the boundaries of the WOC, combining the sides of adjacent rhombuses and orienting the horizontal wellbores of the production wells of the rhombuses parallel to the strike line of the structure, then the required number of rows of rhombuses is designed until the entire area of the structure is filled up to the WOC line.

EFFECT: increasing the efficiency of oil deposit development, uniformity of oil reserves production, maintaining high rates of reservoir recovery due to the optimal location of the bottomholes of vertical injection, vertical and horizontal production wells along the area of distribution of the oil-bearing reservoir, as well as expanding technological capabilities.

1 cl, 4 dwg