Horizontal well oil-gas-passing water blocking device

Abstract

The invention discloses a horizontal well oil-gas-passing water blocking device. The horizontal well oil-gas-passing water blocking device mainly comprises a device body (29), an inlet (1), a main runner (2), a first circular truncated cone runner (4), a buffering runner (6A), a second circular truncated cone runner (7), a third circular truncated cone runner (8), a fourth circular truncated conerunner (9), a fifth circular truncated cone runner (10), a cut-in runner (11), an outer cavity rotary runner (12), an inner cavity rotary runner (14), a first branch runner (19), a second branch runner (21), a third branch runner (23) and an outlet (15). The horizontal well oil-gas-passing water blocking device is designed according to the Bernoulli principle and the Y-shaped runner flow dividingand phase splitting principle, can be used for water blocking of low-viscosity and ultra-low-viscosity crude oil wells and can also be used for water blocking of gas wells. The horizontal well oil-gas-passing water blocking device is suitable for being installed on a new well to be used for balancing the inflow profile before formation water breaks through a shaft and installed on an old well to be used for greatly increasing the additional resistance of water after formation water breaks through the shaft, and the purposes of reducing the water content and improving the oil-gas recovery ratioare achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development in the petroleum industry. Specifically, it relates to a horizontal well passing oil and gas water blocking device. The device can be used for horizontal gas well water control and oil well water blocking, prolonging the service life of oil and gas wells and improving oil and gas recovery. Background technique [0002] Thanks to the improvement of directional drilling technology and the advantages of large drainage area, horizontal well completion is widely used in my country's onshore oilfields and offshore oilfields. However, due to the heterogeneity of interlayer, intralayer, and completion section permeability, different water-avoidance heights, and water ridge shapes, water ridges are prone to occur in edge-bottom water reservoirs when horizontal wells are used for development. When formation water in a certain section breaks through the wellbore, the water cut of oil a...

AI Technical Summary

Problems solved by technology

[0003] At present, the application reports of automatic inflow control devices are only applicable to oil wells with a viscosity greater than 10mpa.s. When the viscosity of crude oil is less than 10mpa.s, it is no longer applicable. However, the viscosity of crude oil in some offshore oilfields in my country is even as low as 0.3mpa.s. The breakthrough of the technical bottleneck is imminent; at the same time, when the water-gas ratio is relatively low in the process of gas well exploitation in my country, foam drainage technology can be used to discharge the accumulated water in the wellbore to the wellhead, but when the water-gas ratio is too high, the foam drainage technology is due to the cost. Substantial increase, no longer applicable

Images