METHOD OF OIL FORMATION DEVELOPMENT Russian patent published in 2017 - IPC E21B43/20 E21B7/04 

FIELD: oil and gas industry.

SUBSTANCE: according to the method, it is envisaged to develop an oil formation area by the method of oil displacement with water by the means of a single well, equipped with two strings of tubes: a conventional tubing string and a string of flexible inserted coiled tubing tubes. Drilling an L-shaped well is carried out by opening an oil and an underlying aquifer formations with vertical well, vertically from the top down. Then, the wellbore is rotated by 90°, the aquifer formation in the rock is passed below, and both layers are crossed a second time, but in the direction from the bottom up. The first string of tubes in the form of a coiled tubing string is equipped with an electric centrifugal pump. With the help of this plant and thanks to two packer devices, water is taken from the aquifer formation and pumped into a productive oil horizon. The second string of tubes - the tubing string - is equipped with a deep-well pump and descended into the well at the required depth above the formation until the first crossing of the well with the formation. The oil formation is developed by pumping water from the underlying aquifer formation and taking out oil using a second pumping unit.

EFFECT: improving the efficiency of the method by reducing development costs through the use of a special well profile.

3 cl, 1 dwg