Yield increasing method for reducing pressure loss in gas well by using compressor

Abstract

The invention belongs to the technical field of gas field opening, and particularly relates to a yield increasing method for reducing pressure loss in a gas well by using a compressor. The method is characterized by comprising the following steps: (1) matching construction transformation; (2) observing and recording; (3) supplying gas to a trunk line, and adjusting the outlet pressure of a separator; (4) closing an oil casing pipe, carrying out pressurizing injection, and pressing a liquid level; (5) positively pushing a foam scrubbing agent to reduce the wellbore density for the next blowoutdrainage; (6) adjusting the discharge capacity, keeping the discharge capacity higher than the critical liquid carrying flow, continuously discharging the liquid, and performing self-spraying production; (7) finishing liquid drainage, and finishing gas lift construction after the oil pressure is increased; and (8) after the gas lift discharge aiding well is continuously produced, observing the instantaneous flow and pressure change. According to the invention, the discharge aiding process is additionally provided, so that the conventional compressor can continuously lift and stop production and low-yield well accumulated liquid by adopting the modes of forward lifting, reverse lifting, combined lifting and liquid dropping, open flow and the like, and the requirement of wellbore liquid column re-production under the condition of maximum exhaust pressure of the natural gas compressor is met.

Description

technical field [0001] The invention belongs to the technical field of gas field opening, and in particular relates to a method for increasing production by using a compressor to reduce pressure loss in a gas well. Background technique [0002] During the production process of gas wells, water and condensate in the form of mist flow are accompanied by natural gas overflow. At present, gas wells in domestic gas fields in the middle and later stages of development are depleted of formation energy, and the production capacity of gas wells decreases, and the water-carrying capacity also decreases. When the gas flow rate drops to a certain When the critical liquid-carrying flow rate is not reached, the gas state will change from mist flow to annular flow to slug flow, and finally deposits will accumulate at the bottom of the wellbore, and the accumulation of liquid in the wellbore will increase the bottomhole pressure, resulting in a decrease in the formation gas overflow capabili...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem in the prior art that the exhaust pressure of the compressor is less than or equal to 25MPa, and the gas well with a fluid column exceeding 2500m cannot be reversed to discharge liquid, and provides a method of connecting a single well through on-site supporting compressors, separators and other equipment , a production stimulation method to reduce the pressure loss in the gas well, realize the continuous and effective drainage and shutdown of conventional compressors, the wellbore of low-production gas wells and the accumulation of liquid in formations, and restore the production capacity of gas wells , increase the production of gas wells, and improve the ultimate recovery of gas wells

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