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A method for determining the amount of acid liquid in the process of plugging removal in gas wells

A determination method and technology for gas wells, which are used in earth-moving drilling, wellbore/well components, cleaning appliances, etc., can solve the problems of acid reservoir impact, increased descaling cost, poor descaling effect, etc., to avoid Reservoir damage, efficient plug removal, and beneficial control effects

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, the amount of acid solution is determined by the experience of the operator. When the amount of acid solution is too small, the descaling effect will be poor; Reservoirs have a certain degree of impact

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  • A method for determining the amount of acid liquid in the process of plugging removal in gas wells
  • A method for determining the amount of acid liquid in the process of plugging removal in gas wells
  • A method for determining the amount of acid liquid in the process of plugging removal in gas wells

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the implementation of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In the process of oil and gas exploitation, when the formation pressure or production pressure changes, scaling may form in the underground reservoir, perforation hole, wellbore, downhole pump, and surface oil and gas gathering and transportation equipment pipeline. For example, gas wells are developing and producing During the process, as the formation pressur...

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Abstract

The invention provides a method for determining the amount of acid liquid in the process of unblocking a gas well, which includes: obtaining the volume of the reservoir in the gas well; obtaining the volume of the tubing string; obtaining the correction parameter of the volume of the tubing string; The volume and correction parameters are used to determine the amount of acid liquid in the process of plugging removal of gas wells. The method can accurately calculate the amount of acid liquid required for plugging removal of gas wells, which can not only effectively achieve plugging removal of gas wells, but also control the cost of plugging removal reasonably, and avoid excessive costs caused by excessive acid liquid and adverse effects on the reservoir environment. s damage.

Description

technical field [0001] The invention relates to a method for determining the amount of acid liquid in the process of removing plugging of gas wells, and belongs to the technical field of oil and gas field development. Background technique [0002] In the process of oil and gas exploitation, when the formation pressure or production pressure changes, scaling will form in the underground reservoir, perforation hole, wellbore, downhole pump, and surface oil and gas gathering and transportation equipment pipelines, resulting in the formation of oil and gas strings, production pipelines and pipelines. The blockage of the equipment and the blockage of the tubing string will directly lead to low production capacity or no production. [0003] Currently, chemical methods of acidification are commonly used for descaling. Acidification, also known as matrix acidification or pore acidification, is the process of injecting acid liquid into pores or fractures of the formation under the f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/06
CPCE21B37/06
Inventor 赵力彬崔陶峰何元元聂海峰刘明球王鹏程桑利军
Owner PETROCHINA CO LTD
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