Thin-oil-doped heavy oil gas lift technology pipe column and implementation method

Abstract

The invention provides a thin-oil-doped heavy oil gas lift technology pipe column. The thin-oil-doped heavy oil gas lift technology pipe column includes a double-layer concentric oil pipe column arranged in a casing pipe, one or more gas lift valves and working barrels are arranged on a pipe column of a small oil column of the concentric oil pipe column, the bottom end of the small pipe column isconnected with a mixing device, a first annular space is formed between the casing pipe and the oil pipe of the concentric oil pipe column, and a second annular space is formed between the oil pipe and the small oil pipe. At the same time, the invention provides an implementation method of the thin-oil-doped heavy oil gas lift technology pipe column. According to the thin-oil-doped heavy oil gas lift technology pipe column, the remaining energy of the formation is effectively utilized to change the production pipe column under the premise of no well killing and no pressure, the thin-oil dopingand mixing effects are improved, injected gas is dissolved in crude oil, density and viscosity of the crude oil are further decreased, the lifting effect of a heavy oil well is improved, the cost oflifting is lowered, and the economic benefit is increased.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation, in particular to a thick oil mixed with dilute gas lift process string and an implementation method. Background technique [0002] my country is rich in heavy oil resources and is the fourth largest producer of heavy oil in the world after the United States, Canada and Venezuela. With the gradual depletion of conventional oil reservoirs, major oil fields have entered a period of high water production or even ultra-high water production, and the exploitation of heavy oil will play an important role in supporting the maintenance and growth of my country's crude oil production. However, heavy oil has a high content of heavy components and is extremely temperature sensitive. During the flow of thousands of meters of wellbore, as the wellbore temperature gradually decreases, the viscosity of crude oil increases greatly, the fluidity becomes poor, and production becomes difficult...

AI Technical Summary

Problems solved by technology

[0003] Due to the current gas lift oil recovery technology and heavy oil lifting technology applied to heavy oil lifting, there are problems such as low dilution efficiency, large amount of thin oil, and unsuitable technology.

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