Wellbore salt deposition monitoring device and method for gas storage

Abstract

The invention provides a wellbore salt deposition monitoring device for a gas storage. The device comprises a monitoring tool which is used for transmitting ultrasonic waves to the periphery under the guidance of a collection instruction in an ascending process from a well bottom to top, and receiving a feedback signal, and a ground system which is used for sending the collection instruction to the monitoring tool, receiving a feedback signal transmitted by the monitoring tool, and measuring and calculating the position and the thickness of the wellbore salt deposition in real time according to the feedback signal and the thickness of the wellbore. According to the invention, the salt deposition degree and the salt deposition position of an oil pipe and a sleeve can be monitored; not only can wellbore salt deposition monitoring be realized, but also a cable can be cut off under necessary conditions when a tubular column cannot be pulled out by lifting, so that serious accidents are avoided; and according to the wellbore salt deposition monitoring device, required ground flow equipment is simple, and construction is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a wellbore salt accumulation monitoring device and method for a gas storage. Background technique [0002] With the continuous deepening of the development of the gas storage, the recovery degree of the gas storage is high and the formation pressure is low. After the exploitation, the salt accumulation of the gas well increases and the degree of salt accumulation increases, which leads to the reduction or shutdown of the gas well production, which greatly affects the production. . [0003] In the prior art, the salt formation prediction method is mainly through the finite element formula analysis of the formation depositional environment, such as reservoir lithology, physical properties, porosity, permeability, fluid flow velocity and rock surface properties, and only predicts However, there is no effective method for the monitoring method of wellbore salt accumula...

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Problems solved by technology

[0002] With the continuous deepening of the development of the gas storage, the recovery degree of the gas storage is high and the formation pressure is low. After the exploitation, the salt accumulation of the gas well increases and the degree of salt accumulation increases, which leads to the reduction or shutdown of the gas well production, which greatly affects the production.

[0003] In the prior art, the salt formation prediction method is mainly through the finite element formula analysis of the formation depositional environment, such as reservoir lithology, physical properties, porosity, permeability, fluid flow velocity and rock surface properties, and only predicts Formation salt accumulation method, but there is no effective means for wellbore salt accumulation monitoring method

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