Method for sealing channeling using gas channeling temperature of fire flood production well and application thereof

Abstract

The application provides a method for sealing gas channeling by using the gas channeling temperature of a fire flooding production well and application thereof, and belongs to the technical field of heavy oil fire flooding exploitation. The method comprises the following steps: injecting air into an injection well, regularly monitoring the parameters and output gas components of the injection well and surrounding production wells; when a gas overlap phenomenon occurs in any production well in the early stage, the monitoring frequency of the production well is increased; when a high-temperature production well appears, the monitoring frequency is increased; if the wellhead temperature is in a first preset range, and the wellhead temperature of the high-temperature production well remains unchanged or continuously increases, the monitoring is intensified; when the output gas components are abnormal, the well is shut down, otherwise, oxygen-reduced air is injected to form low-temperature coke to seal the gas channeling layer; if the wellhead temperature is in a second preset range, oxygen-reduced air is injected to form low-temperature coke to seal the gas channeling layer according to the dynamic liquid level and the position of the gas channeling layer. The application provides a method for chemically sealing gas channeling, reduces gas channeling, and has great significance for large-scale development.

Description

Technical Field

[0001] This invention relates to the field of heavy oil fire-flooding extraction technology, and in particular to a method for sealing gas channeling using the gas channeling temperature of fire-flooding production wells and its application. Background Technology

[0002] Fire flooding technology has long been considered a highly promising method for extracting heavy and extra-heavy oil. It involves injecting air into the oil reservoir from an injection well, igniting the reservoir with an igniter or chemical agent, and generating heat, gas, water vapor, and gaseous hydrocarbons through combustion. This process creates various displacement effects, offering advantages such as high recovery rates, low energy consumption, and low pollution. After years of research and development, fire flooding has been widely adopted and proven to be a highly efficient method for enhancing heavy oil recovery. Compared to other enhanced oil recovery methods, fire-firing technology offers advantages such as low cost, abundant gas supply, high crude oil displacement efficiency, safety, environmental friendliness, and complete combustion.

[0003] In the actual development of the oilfield, after continuously injecting oxygen-containing gas into the fuel layer from the injection well, the uneven advancement of the leading edge of the fire line and the large differences in the effectiveness of the well group are caused by a combination of factors such as reservoir physical property differences, heterogeneity, gas channeling, gas over-coverage and production control.

[0004] During field trials, some production wells around the injection wells showed signs of effective fire-driven operation, while others showed delayed or prolonged ineffectiveness. Influenced by factors such as gas channeling, flue gas inrush, and injection-production ratio during the initial steam injection phase, some effective production wells experienced high daily gas production. Due to channel grade limitations, some wells exhibited high wellhead temperatures, threatening well shutdown. Without appropriate measures, this gas channeling would worsen, severely impacting production. Therefore, timely management and effective utilization of production wells exhibiting gas channeling and high temperatures after reservoir ignition are crucial. Theoretically, due to the gas over-coverage effect during the injection phase, most gas channeling channels are located in the upper and middle parts of the oil layer. However, specific details require confirmation based on tested production fluid and gas profiles, which presents significant challenges due to the diverse types and large volumes of gases involved.

[0005] Chinese patent application CN111827920A discloses a layered gas channeling plugging process for fire-driven production wells, comprising: (1) lowering the layered gas channeling plugging string of the fire-driven production well to the designed position, and then injecting a certain amount of gel composition into the oil layer from the tubing; (2) injecting a certain amount of high-strength gel particles from the tubing; (3) injecting an inorganic sealing agent plugging system, replacing the injection with clean water, and then excessively replacing the clean water. This solution solves the problems of unsatisfactory plugging effect, complex construction procedures, long construction time, and high operating costs of the original technology. However, it provides a method of physical plugging using a plugging string, but does not utilize the wellhead temperature of the production well to achieve plugging through chemical means.

[0006] Currently, there is no effective chemical solution to the gas channeling that occurs when the wellhead temperature of a fire-driven production well is high. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps: utilizing the heat of the gas channeling channel in the fire-driven production well to cause crude oil and hot air to undergo a low-temperature oxidation reaction, forming low-temperature coke, and sealing the gas channeling layer. Specifically, this includes: Gas injection steps: Injecting air into the injection well, periodically monitoring and recording the parameters and produced gas composition of the injection well and surrounding production wells; Monitoring steps: When any production well surrounding the injection well has previously experienced gas over-coverage, increase the monitoring and recording frequency for that production well; When a high-temperature production well appears around the injection well, increase the monitoring and recording frequency; If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, intensify monitoring of the produced gas composition; If the produced gas composition is abnormal for a consecutive preset number of monitoring values, shut down the well; otherwise, inject deoxygenated air into the high-temperature production well to form low-temperature coke and seal the gas channeling layer; If the wellhead temperature of the high-temperature production well is within the second preset range, intensify monitoring of the produced gas composition, simultaneously monitor the wellbore dynamic fluid level, and based on the dynamic fluid level and the location of the gas channeling layer, inject deoxygenated air into the high-temperature production well to conduct a low-temperature oxidation reaction, forming low-temperature coke and sealing the gas channeling layer.

[0008] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0009] The heat from the gas channel of the fire-driven production well is used to cause crude oil to undergo a low-temperature oxidation reaction with hot air, forming low-temperature coke to seal the gas channeling layer; the low temperature is below 200°C.

[0010] Preferably, the heat from the gas channel of the fire-driven production well is used to cause a low-temperature oxidation reaction between crude oil and hot air, forming low-temperature coke, specifically including:

[0011] Gas injection steps:

[0012] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well.

[0013] Monitoring steps:

[0014] If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well.

[0015] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0016] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains unchanged or continues to rise, the composition of the produced gas is monitored more frequently. If the composition of the produced gas is abnormal for a preset number of consecutive monitoring values, the well is shut down. Otherwise, oxygen-reduced air is injected into the high-temperature production well to form low-temperature coke and block the gas channeling layer.

[0017] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is monitored at the same time. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-reduced air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to block the gas channeling layer.

[0018] Preferably, the conditions that cause gas over-coverage include at least one of the following: the number of initial churn cycles of production wells around the injection well exceeds the preset churn cycle threshold; the production-injection ratio of production wells around the injection well is higher than the preset production-injection ratio threshold; the distance between production wells around the injection well and the injection well is less than the preset distance threshold; and there are high-permeability channels or dominant channels in production wells around the injection well.

[0019] Preferably, the conditions that cause gas over-coverage include at least one of the following: the number of inflow and outflow cycles of production wells around the injection well is greater than 10 in the early stage; the production-injection ratio of production wells around the injection well is higher than 1.0 in the early stage; and the distance between production wells around the injection well and the injection well is less than 100m.

[0020] Preferably, the parameters of the injection well and the production wells surrounding the injection well include the injected gas volume, injection time, distance between the production wells surrounding the injection well and the injection well, daily gas production of the production wells surrounding the injection well, and wellhead temperature.

[0021] Preferably, when the daily gas production of production wells around a certain injection well gradually increases and the wellhead temperature gradually rises to more than 200°C, the production well is considered to be a high-temperature production well.

[0022] Preferably, when the CO2 concentration is still higher than the preset CO2 concentration threshold, there is no oxygen, and the combustible gas concentration is lower than the preset combustible gas concentration threshold, the composition of the produced gas is abnormal.

[0023] Preferably, the CO2 concentration threshold is 12%, the combustible gas concentration threshold is 10%, and the oxygen concentration of the deoxygenated air is greater than 5% and less than 10%.

[0024] Preferably, if the wellhead temperature of the high-temperature production well is within a first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas is monitored more intensively, specifically as follows:

[0025] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0026] If the oil pressure or casing temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas.

[0027] Preferably, if the wellhead temperature of the high-temperature production well is within the first preset range, 80-100℃, the well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified; if the oil pressure or casing pressure temperature reaches 120℃, observe for 1-2 days; if the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas; if the monitored values ​​of the produced gas composition are abnormal for a preset number of consecutive times, the well is shut down; otherwise, oxygen-depleted air is injected into the high-temperature production well to form low-temperature coke and seal the gas channeling layers.

[0028] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0029] The oxygen-reduced air injection volume is less than or equal to Y / X.

[0030] Preferably, if the wellhead temperature of the high-temperature production well is within a second preset range, when the dynamic fluid level is below the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well according to the positions of the dynamic fluid level and the gas channeling layer, and crude oil containing heavy components is also injected.

[0031] Preferably, if the wellhead temperature of the high-temperature production well is within a second preset range, oxygen-depleted air is injected into the high-temperature production well according to the location of the dynamic fluid level and the gas channeling layer to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0032] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by oxygen-reduced air. After achieving low-temperature oxidation and combustion, the injection of oxygen-reduced air is stopped.

[0033] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by deoxygenated air, which causes a low-temperature oxidation reaction until low-temperature coke is formed using the gas channeling temperature at the bottom of the well, at which point the injection of deoxygenated air is stopped.

[0034] When gas channeling occurs in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, oxygen-depleted air is injected first to induce a low-temperature oxidation reaction until the wellhead temperature of the production well returns to normal, at which point the injection of oxygen-depleted air is stopped.

[0035] Preferably, if the wellhead temperature of the high-temperature production well is within a second preset range, oxygen-depleted air is injected into the high-temperature production well according to the location of the dynamic fluid level and the gas channeling layer. When the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components also needs to be injected to form low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0036] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0037] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer.

[0038] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer.

[0039] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

[0040] Preferably, if the wellhead temperature of a high-temperature production well is greater than or equal to 120°C, the wellhead temperature of the high-temperature production well is considered to be within the second preset range. At this time, the temperature of the gas channeling fluid in the production well is between 150-200°C.

[0041] Preferably, before the gas injection stage, the method further includes recording the ignition time of the injection well, and determining that the formation of the injection well has achieved high-temperature combustion after successful ignition.

[0042] Preferably, after successful ignition of the injection well, the composition and production volume of the gas produced at the wellhead are monitored. When the CO2 concentration in the produced gas tends to stabilize, it is determined that the injection well has achieved high-temperature combustion. A CO2 concentration >12% is considered to indicate that the CO2 concentration is tending to stabilize.

[0043] This invention provides an application of a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well. Any of the above-mentioned methods for sealing gas channeling using the gas channeling temperature of a fire-driven production well are applied to the fire-driven production well to seal the gas channeling layers.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0045] (1) This invention utilizes the heat of the gas channel in the high-temperature production well of fire-driven well to inject deoxygenated air or increase the injection of crude oil containing heavy components, and a low-temperature oxidation reaction occurs. The crude oil and hot air oxidize coke, which blocks the high-permeability and dominant channels, thereby reducing gas channeling. At the same time, it plays the role of air-driven recovery, which is of great significance for large-scale development and has a very broad application prospect. Attached Figure Description

[0046] Figure 1 A flowchart of a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, according to an embodiment of the present invention.

[0047] Figure 2 A flowchart of a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, according to another embodiment of the present invention. Detailed Implementation

[0048] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0050] By utilizing the heat from the gas channel in the fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas-channeling layers; the low temperature is below 200℃. 200-350℃ is considered medium-high temperature, and above 350℃ is considered high temperature.

[0051] According to a specific embodiment of the present invention, the heat from the gas channel of a fire-driven production well is used to cause crude oil to undergo a low-temperature oxidation reaction with hot air to form low-temperature coke, specifically including:

[0052] Gas injection steps:

[0053] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well.

[0054] Monitoring steps:

[0055] If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well.

[0056] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0057] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains unchanged or continues to rise, the composition of the produced gas is monitored more frequently. If the composition of the produced gas is abnormal for a preset number of consecutive monitoring values, the well is shut down. Otherwise, oxygen-reduced air is injected into the high-temperature production well to form low-temperature coke and block the gas channeling layer.

[0058] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is monitored at the same time. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-reduced air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to block the gas channeling layer.

[0059] According to a specific embodiment of the present invention, the conditions that cause gas over-coverage include at least one of the following: the number of initial churn cycles of production wells around the injection well is more than a preset churn cycle threshold; the production-injection ratio of production wells around the injection well is higher than a preset production-injection ratio threshold; the distance between production wells around the injection well and the injection well is less than a preset distance threshold; and there are high-permeability channels or dominant channels in production wells around the injection well.

[0060] According to a specific embodiment of the present invention, the parameters of the injection well and the production wells surrounding the injection well include the injected gas volume, injection time, the distance between the production wells surrounding the injection well and the injection well, the daily gas production of the production wells surrounding the injection well, and the wellhead temperature.

[0061] According to a specific embodiment of the present invention, when the daily gas production of production wells around a certain injection well gradually increases and the wellhead temperature gradually rises to more than 200°C, the production well is considered to be a high-temperature production well.

[0062] According to a specific embodiment of the present invention, when the CO2 concentration is still higher than a preset CO2 concentration threshold, there is no oxygen, and the combustible gas concentration is lower than a preset combustible gas concentration threshold, the composition of the produced gas is abnormal.

[0063] According to a specific embodiment of the present invention, the CO2 concentration threshold is 12%, the combustible gas concentration threshold is 10%, and the oxygen concentration of the deoxygenated air is greater than 5% and less than 10%.

[0064] According to a specific embodiment of the present invention, if the wellhead temperature of the high-temperature production well is within a first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas is monitored more intensively, specifically as follows:

[0065] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0066] If the oil pressure or casing temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas.

[0067] According to a specific embodiment of the present invention, if the wellhead temperature of the high-temperature production well is within the first preset range, 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified; if the oil pressure or casing pressure temperature reaches 120℃, observe for 1-2 days; if the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas; if the monitored values ​​of the produced gas composition are abnormal for a preset number of consecutive times, shut down the well; otherwise, inject deoxygenated air into the high-temperature production well to form low-temperature coke and seal the gas channeling layer;

[0068] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0069] The oxygen-reduced air injection volume is less than or equal to Y / X.

[0070] According to a specific embodiment of the present invention, if the wellhead temperature of the high-temperature production well is within a second preset range, when the dynamic fluid level is below the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well according to the positions of the dynamic fluid level and the gas channeling layer, and crude oil containing heavy components is also injected.

[0071] According to a specific embodiment of the present invention, if the wellhead temperature of the high-temperature production well is within a second preset range, oxygen-depleted air is injected into the high-temperature production well based on the location of the dynamic fluid level and the gas channeling layer to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0072] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by oxygen-reduced air. After achieving low-temperature oxidation and combustion, the injection of oxygen-reduced air is stopped.

[0073] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by deoxygenated air, which causes a low-temperature oxidation reaction until low-temperature coke is formed using the gas channeling temperature at the bottom of the well, at which point the injection of deoxygenated air is stopped.

[0074] When gas channeling occurs in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, oxygen-depleted air is injected first to induce a low-temperature oxidation reaction until the wellhead temperature of the production well returns to normal, at which point the injection of oxygen-depleted air is stopped.

[0075] According to a specific embodiment of the present invention, if the wellhead temperature of the high-temperature production well is within a second preset range, oxygen-depleted air is injected into the high-temperature production well based on the location of the dynamic fluid level and the gas channeling layer. When the dynamic fluid level is located below the gas channeling layer, crude oil containing heavy components is also injected to form low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0076] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0077] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer.

[0078] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer.

[0079] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

[0080] According to a specific embodiment of the present invention, if the wellhead temperature of a high-temperature production well is greater than or equal to 120°C, the wellhead temperature of the high-temperature production well is considered to be in the second preset range. At this time, the temperature of the gas channeling fluid in the production well is between 150-200°C.

[0081] According to a specific embodiment of the present invention, before the gas injection stage, the method further includes recording the ignition time of the injection well, and determining that the formation of the injection well has achieved high-temperature combustion after successful ignition of the injection well.

[0082] According to a specific embodiment of the present invention, after successful ignition of the injection well, the composition and production volume of the gas produced at the wellhead of the production well are monitored. When the CO2 concentration in the produced gas tends to stabilize, it is determined that the injection well has achieved high-temperature combustion. A CO2 concentration >12% is considered to indicate that the CO2 concentration is tending to stabilize.

[0083] Example 1

[0084] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0085] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0086] The heat from the gas channel of the fire-driven production well is used to cause crude oil to undergo a low-temperature oxidation reaction with hot air, forming low-temperature coke to seal the gas channeling layer; the low temperature is below 200°C.

[0087] Example 2

[0088] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0089] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0090] Utilizing the heat from the gas channel of a fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas channeling layers; the low temperature is below 200℃; specifically including:

[0091] Gas injection steps:

[0092] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well.

[0093] Monitoring steps:

[0094] If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well.

[0095] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0096] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains unchanged or continues to rise, the composition of the produced gas is monitored more frequently. If the composition of the produced gas is abnormal for a preset number of consecutive monitoring values, the well is shut down. Otherwise, oxygen-reduced air is injected into the high-temperature production well to form low-temperature coke and block the gas channeling layer.

[0097] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is monitored at the same time. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-reduced air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to block the gas channeling layer.

[0098] Example 3

[0099] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0100] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0101] Utilizing the heat from the gas channel of a fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas channeling layers; the low temperature is below 200℃; specifically including:

[0102] Gas injection steps:

[0103] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well.

[0104] Monitoring steps:

[0105] If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well.

[0106] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0107] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas will be monitored more intensively, specifically as follows:

[0108] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0109] If the oil pressure or casing temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas.

[0110] If the monitored values ​​of the produced gas composition are abnormal for a preset number of consecutive times, the well will be shut down; otherwise, oxygen-reduced air will be injected into the high-temperature production well to form low-temperature coke and seal the gas channeling layer.

[0111] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is also monitored. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0112] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by oxygen-reduced air. After achieving low-temperature oxidation and combustion, the injection of oxygen-reduced air is stopped.

[0113] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by deoxygenated air, which causes a low-temperature oxidation reaction until low-temperature coke is formed using the gas channeling temperature at the bottom of the well, at which point the injection of deoxygenated air is stopped.

[0114] When gas channeling occurs in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, oxygen-depleted air is injected first to induce a low-temperature oxidation reaction until the wellhead temperature of the production well returns to normal, at which point the injection of oxygen-depleted air is stopped.

[0115] Example 4

[0116] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0117] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0118] Utilizing the heat from the gas channel of a fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas channeling layers; the low temperature is below 200℃; specifically including:

[0119] Gas injection steps:

[0120] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well.

[0121] Monitoring steps:

[0122] If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well.

[0123] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0124] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas will be monitored more intensively, specifically as follows:

[0125] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0126] If the oil pressure or casing pressure temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas. If the production gas composition is abnormal for the preset number of consecutive monitoring values, shut down the well. Otherwise, inject deoxygenated air into the high-temperature production well to form low-temperature coke and seal the gas channeling layer.

[0127] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0128] The oxygen-reduced air injection volume is less than or equal to Y / X.

[0129] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is also monitored. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0130] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0131] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer.

[0132] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer.

[0133] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

[0134] Example 5

[0135] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0136] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0137] Utilizing the heat from the gas channel of a fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas channeling layers; the low temperature is below 200℃; specifically including:

[0138] Gas injection steps:

[0139] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells around the injection well include those located 50-200m away from the injection well. The parameters include the amount of gas injected, the injection time, the distance between the production wells around the injection well and the injection well, the daily gas production of the production wells around the injection well, and the wellhead temperature.

[0140] Monitoring steps:

[0141] If any of the following situations have occurred in the production wells surrounding an injection well in the early stage: the number of throughput cycles of the production wells surrounding the injection well in the early stage is more than the preset throughput cycle threshold, the production-injection ratio of the production wells surrounding the injection well in the early stage is higher than the preset production-injection ratio threshold, the distance between the production wells surrounding the injection well and the injection well is less than the preset distance threshold, or there is a high-permeability channel or dominant channel in the production wells surrounding the injection well, the monitoring and recording frequency of the production well will be increased.

[0142] When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃.

[0143] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas will be monitored more intensively, specifically as follows:

[0144] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0145] If the oil pressure or casing pressure temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas. If the production gas composition is abnormal for the preset number of consecutive monitoring values, shut down the well. Otherwise, inject deoxygenated air into the high-temperature production well to form low-temperature coke and seal the gas channeling layer.

[0146] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0147] The oxygen-reduced air injection volume is less than or equal to Y / X.

[0148] If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is also monitored. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes:

[0149] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0150] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer.

[0151] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer.

[0152] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

[0153] Example 6

[0154] According to a specific embodiment of the present invention, the method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well will be described in detail below.

[0155] This invention provides a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, comprising the following steps:

[0156] Utilizing the heat from the gas channel of a fire-driven production well, crude oil undergoes a low-temperature oxidation reaction with hot air to form low-temperature coke, sealing the gas channeling layers; the low temperature is below 200℃; specifically including:

[0157] Record the ignition time of the injection well. After successful ignition, it is determined that the formation of the injection well has achieved high-temperature combustion. After successful ignition, monitor the gas composition and production volume of the gas produced at the wellhead of the production well. When the CO2 concentration in the produced gas tends to stabilize, it is determined that the injection well has achieved high-temperature combustion. A CO2 concentration >12% is considered to indicate that the CO2 concentration is tending to stabilize.

[0158] Gas injection steps:

[0159] Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells around the injection well include those located 50-200m away from the injection well. The parameters include the amount of gas injected, the injection time, the distance between the production wells around the injection well and the injection well, the daily gas production of the production wells around the injection well, and the wellhead temperature.

[0160] Monitoring steps:

[0161] If any of the following conditions have occurred in the production wells surrounding an injection well in the early stage: the production wells surrounding the injection well had more than 10 inflow / outflow cycles in the early stage; the production-injection ratio of the production wells surrounding the injection well was higher than 1.0 in the early stage; the distance between the production wells surrounding the injection well and the injection well was less than 100m; or there were high-permeability channels or dominant channels in the production wells surrounding the injection well, the monitoring and recording frequency of the production well should be increased.

[0162] When a high-temperature production well appears in the production wells around the injection well, the monitoring and recording frequency should be increased; the temperature of a high-temperature production well is greater than 200℃; when the daily gas production of a production well around a certain injection well gradually increases and the wellhead temperature gradually rises to greater than 200℃, the production well is considered to be a high-temperature production well.

[0163] If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas will be monitored more intensively, specifically as follows:

[0164] The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified.

[0165] If the oil pressure or casing temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas. If the produced gas composition is abnormal for a preset number of consecutive monitoring values, shut in the well. If the CO2 concentration is still higher than the preset CO2 concentration threshold, there is no oxygen, and the combustible gas concentration is lower than the preset combustible gas concentration threshold, the produced gas composition is abnormal. In this embodiment, the CO2 concentration threshold is 12%, and the combustible gas concentration threshold is 10%. Otherwise, inject deoxygenated air into the high-temperature production well. In this embodiment, the oxygen concentration of the deoxygenated air is greater than 5% and less than 10%, forming low-temperature coke to block gas channeling layers.

[0166] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0167] The oxygen-reduced air injection volume is less than or equal to Y / X.

[0168] If the wellhead temperature of the high-temperature production well is within the second preset range (if the wellhead temperature of the high-temperature production well is greater than or equal to 120°C, it is considered that the wellhead temperature of the high-temperature production well is within the second preset range, at which time the fluid temperature in the gas channeling layer of the production well is between 150-200°C), the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is monitored simultaneously. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well. In this embodiment, the oxygen concentration of the oxygen-depleted air is greater than 5% and less than 10%, and a low-temperature oxidation reaction is carried out to form low-temperature coke, which seals the gas channeling layer. Specifically, this includes:

[0169] Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well.

[0170] When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer.

[0171] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer.

[0172] When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

[0173] Example 7

[0174] According to a specific embodiment of the present invention, the application of the method of sealing gas channeling using the gas channeling temperature of a fire-driven production well will be described in detail below.

[0175] This invention provides an application of a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well. Any of the above-mentioned methods for sealing gas channeling using the gas channeling temperature of a fire-driven production well are applied to the fire-driven production well to seal the gas channeling layers.

[0176] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, characterized in that, Includes the following steps: The heat from the gas channel of the fire-driven production well is used to cause crude oil to undergo a low-temperature oxidation reaction with hot air, forming low-temperature coke to seal the gas channeling layer; the low temperature is below 200°C. This includes utilizing the heat from the gas channel of the fire-driven production well to cause a low-temperature oxidation reaction between crude oil and hot air, forming low-temperature coke. Specifically, this includes: Gas injection steps: Air is injected into the injection well, and the parameters and composition of the produced gas of the injection well and the surrounding production wells are monitored and recorded regularly. The production wells surrounding the injection well include those located 50-200m away from the injection well. Monitoring steps: If any production well around an injection well has previously experienced gas overburden, increase the frequency of monitoring and recording for that production well. When high-temperature production wells appear around the injection well, increase the frequency of monitoring and recording; the temperature of the high-temperature production well is greater than 200℃. If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains unchanged or continues to rise, the composition of the produced gas is monitored more frequently. If the composition of the produced gas is abnormal for a preset number of consecutive monitoring values, the well is shut down. Otherwise, oxygen-reduced air is injected into the high-temperature production well to form low-temperature coke and block the gas channeling layer. If the wellhead temperature of the high-temperature production well is within the second preset range, the composition of the produced gas is monitored more intensively, and the dynamic fluid level in the wellbore is also monitored. Based on the dynamic fluid level and the location of the gas channeling layer, oxygen-reduced air is injected into the high-temperature production well to carry out a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer.

2. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 1, characterized in that, The conditions that cause gas over-coverage include at least one of the following: the number of initial blotting cycles of production wells around the injection well exceeds the preset blotting cycle threshold; the production-injection ratio of production wells around the injection well is higher than the preset production-injection ratio threshold; the distance between production wells around the injection well and the injection well is less than the preset distance threshold; and the existence of high-permeability channels or dominant channels in production wells around the injection well.

3. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 1, characterized in that, The parameters of the injection well and the production wells around it include the injected gas volume, injection time, distance between the injection well and the production wells around it, daily gas production of the production wells around it, and wellhead temperature.

4. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 3, characterized in that, When the daily gas production of production wells around a certain injection well gradually increases and the wellhead temperature gradually rises to more than 200°C, the production well is considered to be a high-temperature production well.

5. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 4, characterized in that, When the CO2 concentration is still higher than the preset CO2 concentration threshold, there is no oxygen, and the combustible gas concentration is lower than the preset combustible gas concentration threshold, the composition of the produced gas is abnormal.

6. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 5, characterized in that, The CO2 concentration threshold is 12%, the combustible gas concentration threshold is 10%, and the oxygen concentration of the deoxygenated air is greater than 5% and less than 10%.

7. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 5, characterized in that, If the wellhead temperature of the high-temperature production well is within the first preset range, and the wellhead temperature remains constant or continues to rise, the composition of the produced gas will be monitored more intensively, specifically as follows: The first preset range is 80-100℃. If the wellhead temperature of the high-temperature production well is between 80-100℃, the production well is considered a high-temperature production well, and the monitoring and recording of the high-temperature production well are intensified. If the oil pressure or casing temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas.

8. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 7, characterized in that, If the wellhead temperature of the high-temperature production well is within the first preset range, 80-100℃, the well is considered a high-temperature production well, and monitoring and recording of the high-temperature production well are intensified. If the oil pressure or casing pressure temperature reaches 120℃, observe for 1-2 days. If the wellhead temperature remains unchanged or continues to rise, monitor the composition of the produced gas. If the monitored values ​​of the produced gas composition are abnormal for a preset number of consecutive times, shut down the well. Otherwise, inject deoxygenated air into the high-temperature production well to form low-temperature coke and seal the gas channeling layers. Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well. The oxygen-reduced air injection volume is less than or equal to Y / X.

9. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 5, characterized in that, If the wellhead temperature of the high-temperature production well is within the second preset range, when the dynamic fluid level is below the gas channeling layer, oxygen-depleted air is injected into the high-temperature production well according to the positions of the dynamic fluid level and the gas channeling layer, and crude oil containing heavy components is also injected.

10. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 9, characterized in that, If the wellhead temperature of the high-temperature production well is within the second preset range, oxygen-depleted air is injected into the well based on the location of the dynamic fluid level and the gas channeling layer to conduct a low-temperature oxidation reaction, forming low-temperature coke to seal the gas channeling layer. Specifically, this includes: When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by oxygen-reduced air. After achieving low-temperature oxidation and combustion, the injection of oxygen-reduced air is stopped. When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components is injected first, followed by deoxygenated air, which causes a low-temperature oxidation reaction until low-temperature coke is formed using the gas channeling temperature at the bottom of the well, at which point the injection of deoxygenated air is stopped. When gas channeling occurs in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, oxygen-depleted air is injected first to induce a low-temperature oxidation reaction until the wellhead temperature of the production well returns to normal, at which point the injection of oxygen-depleted air is stopped.

11. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 10, characterized in that, If the wellhead temperature of the high-temperature production well is within the second preset range, oxygen-depleted air is injected into the well based on the location of the dynamic fluid level and the gas channeling layer. When the dynamic fluid level is below the gas channeling layer, crude oil containing heavy components also needs to be injected to form low-temperature coke to seal the gas channeling layer. Specifically, this includes: Let Y be the air injection volume of the injection well corresponding to the high-temperature production well, and let X be the production wells deployed around the injection well. When gas channeling is located in the upper part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject crude oil containing heavy components from the wellhead of the high-temperature production well to the gas channeling layer. Let the injected crude oil advance into the formation along the dominant channel. Then slowly inject deoxygenated air and inject with a slug for 5-7 days. The daily injection volume is less than or equal to Y / 5X. Utilize the high temperature of the gas channeling layer and the formation crude oil to achieve on-site low-temperature oxidation and combustion of the crude oil in the gas channeling channel of the high-temperature production well. Stop injecting oxygen and slowly establish a coking zone to seal the gas channeling layer. When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is below the gas channeling layer, connect the surface pipeline and inject oil-containing heavy crude oil from the wellhead of the high-temperature production well. When the crude oil level in the wellbore is equal to the gas channeling layer, slowly inject deoxygenated air. The injected air undergoes a low-temperature slow oxidation reaction with the crude oil in the gas channeling layer. Slug injection is performed for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The low-temperature solidified oxidized coke is formed by utilizing the gas channeling temperature at the bottom of the well to seal the gas channeling layer. When gas channeling is located in the lower part of the oil layer and the dynamic fluid level is above the gas channeling layer, connect the surface pipeline and slowly inject deoxygenated air. Use slug injection to inject the air and the crude oil in the gas channeling layer undergo a low-temperature oxidation reaction. Inject for 5-7 days, with the daily injection volume less than or equal to Y / 5X. The temperature at the production wellhead will then return to normal, forming low-temperature oxidized coke to seal the gas channeling layer.

12. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 11, characterized in that, If the wellhead temperature of a high-temperature production well is greater than or equal to 120℃, it is considered that the wellhead temperature of the high-temperature production well is in the second preset range. At this time, the temperature of the gas channeling fluid in the production well is between 150-200℃.

13. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 12, characterized in that, Before the gas injection stage, it also includes recording the ignition time of the injection well, and confirming that the formation of the injection well has achieved high-temperature combustion after successful ignition.

14. The method for sealing gas channeling using the gas channeling temperature of a fire-driven production well according to claim 13, characterized in that, After successful ignition of the injection well, the composition and production volume of the gas produced at the wellhead are monitored. When the CO2 concentration in the produced gas tends to stabilize, it is determined that the injection well has achieved high-temperature combustion. A CO2 concentration >12% is considered to indicate that the CO2 concentration is tending to stabilize.

15. An application of a method for sealing gas channeling using the gas channeling temperature of a fire-driven production well, characterized in that, The method of sealing gas channeling by utilizing the gas channeling temperature of a fire-driven production well, as described in any one of claims 1-14, is applied to a fire-driven production well to seal gas channeling layers.

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