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Method for determining amount of acid liquor in gas well plugging removing process

A method for determining gas wells, which is applied in earthwork drilling, wellbore/well parts, and cleaning tools, etc., which can solve problems such as the influence of acid reservoirs, increased cost of descaling, and poor descaling effect, so as to avoid Reservoir damage, efficient plugging removal, beneficial effects of control

Active Publication Date: 2020-11-20
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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  • Method for determining amount of acid liquor in gas well plugging removing process
  • Method for determining amount of acid liquor in gas well plugging removing process
  • Method for determining amount of acid liquor in gas well plugging removing process

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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. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] In the process of oil and gas extraction, when the formation pressure or production pressure changes, scaling may form in underground reservoirs, perforated holes, wellbore, downhole pumps, and pipelines of surface oil and gas gathering and transportation equipment. For example, gas wells are developing and producing During the process, as the formation pressure dr...

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Abstract

The invention provides a method for determining the amount of acid liquor in a gas well plugging removing process. The method comprises the following steps of acquiring the volume of a reservoir in agas well, acquiring the volume of a tubing string, acquiring a corrected parameter of the volume of the tubing string, and determining the amount of the acid liquor in the gas well plugging removing process according to the volume of the reservoir, the volume of the tubing string and the corrected parameter. The method can accurately calculate the amount of the acid liquor required for gas well plugging removing, gas well plugging removing can be effectively realized, and the plugging removing cost can be further reasonably controlled, so that too high cost and damage to an environment of thereservoir due to excessive acid liquor are avoided.

Description

technical field [0001] The invention relates to a method for determining the amount of acid liquid used in the process of unblocking gas wells, and belongs to the technical field of oil and gas field development. Background technique [0002] In the process of oil and gas extraction, when formation pressure or production pressure changes, scaling will form in underground reservoirs, perforated holes, wellbores, downhole pumps, and pipelines of surface oil and gas gathering and transportation equipment, resulting Blockage of equipment, and blockage of tubing string will directly lead to low production capacity or no production. [0003] Currently, the chemical method of acidification is usually used for descaling. Acidizing, also known as matrix acidizing or pore acidizing, is to inject acid liquid into the pores or fractures of the formation below the fracture pressure of the reservoir rock, and dissolve the rock minerals or plugging substances through the reaction between ...

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Application Information

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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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