METHOD FOR DEVELOPING OIL DEPOSITS Russian patent published in 2024 - IPC E21B43/20 

FIELD: oil production industry.

SUBSTANCE: method for developing an oil deposit includes drilling out the deposit over the entire area with vertical production wells, identifying areas of the deposit with deteriorated filtration and reservoir properties in the top part of the formation, pumping water and withdrawing oil. In the process of drilling vertical production wells, geophysical research is carried out in the exposed section of the wells. Next, a vertical production well with an oil-saturated top part of the formation is selected, which has a phase permeability that is 3 or more times less than the phase permeability of the oil-saturated underlying part of the formation, while having a vertical oil-saturated thickness of at least 6 m. After that, a vertical production well is perforated in the interval of the oil-saturated underlying part of the formation and the well is put into operation. After achieving the minimum profitable flow rate, the vertical production well is stopped and a horizontal lateral trunk is drilled in the vertical production well in the oil-saturated top part of the formation. Next, a horizontal lateral wellbore is developed to obtain production and a connection is created between the lateral horizontal wellbore and the perforation interval of the vertical production well. After that, simultaneous and separate injection of water into the perforation interval of a vertical production well and production of products from a side horizontal well are carried out.

EFFECT: increases the efficiency of oil deposit development.

1 cl