OIL FIELD DEVELOPMENT METHOD Russian patent published in 2022 - IPC E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the field of the oil industry and can be used to develop oil fields with a grid of directional injection and horizontal production wells. According to the method, at the design stage, a directional injection well located perpendicular to the center of the responsive horizontal production well is determined. The bottomhole pressure is set to be 1-2 MPa higher than the saturation pressure for a horizontal production well. In the center of the horizontal wellbore of the production well, the vertical capacities of the oil-saturated formation are determined from the center of the horizontal wellbore to the roof of the oil-saturated formation h1n and from the center of the horizontal wellbore to the bottom of the oil-saturated formation h2f. Next, in a directional injection well, the vertical thickness of the oil-saturated formation Hf is determined. The perforation of a directional injection wellbore is carried out in three zones of an oil-saturated formation with a certain perforation density, the length of the first zone is determined by the formula: Lzone1 = (h1f : (h1f + h2f)) * Hf - (0,05 * Hf), h1h - vertical thickness of the oil-saturated formation from the center of the horizontal wellbore to the roof of the oil-saturated formation in a horizontal production well, h2f - vertical thickness of the oil-saturated formation from the center of the horizontal wellbore to the bottom of the oil-saturated formation in a horizontal production well, Hf - vertical thickness of the oil-saturated formation in a directional injection well. The length of the third zone is determined by the formula: Lzone3 = (h2f: (h1f + h2f)) * Hf - (0.05 * Hf), m, the length of the second zone is determined by the formula: Lzone2 = Hh - (Lzone1 + Lzone3), m.

EFFECT: proposed method for the development of an oil field makes it possible to increase the efficiency of the development of an oil field, maintain high rates of recovery of recoverable reserves by organizing the injection control process in an influencing directional injection well with optimal secondary opening by the method for cumulative perforation of an oil-saturated reservoir for uniform advancement of the oil displacement front by the injected agent to the producing horizontal well.

1 cl, 1 dwg