阅读说明：本技术 一种高凝油油泥调剖地面注入加热保温系统及方法 (High-pour-point oil sludge profile control ground injection heating and heat preservation system and method ) 是由 韩锋 冷彪 刘大伟 周学金 王肖 杨轶博 彭继明 杨洪梅 邵堃 李松 王帅 于 2020-04-22 设计创作，主要内容包括：本发明公开了一种高凝油油泥调剖地面注入加热保温系统及方法。本发明提供了一种高凝油油泥调剖地面注入加热保温系统,包括油泥调剖剂配制装置、循环加热装置、过滤装置以及注入装置；其中,所述油泥调剖剂配制装置包括有第一加热组件和第一保温组件；所述过滤装置包括有第二加热组件和第二保温组件。本发明还提供了一种高凝油油泥调剖地面注入加热保温方法,包括如下步骤：1)配制油泥溶液：2)配制油泥调剖剂：3)循环加热油泥调剖剂：4)过滤并注入措施井。本发明经过地面五道加热保温工序,使高凝油处在良好的流态下注入井内,保证高凝油油泥调剖井的高效实施,实现污油泥排放的无害化处理,对油田降本增效起着积极作用。(The invention discloses a high-pour-point oil sludge profile control ground injection heating and heat preservation system and method. The invention provides a high-pour-point oil sludge profile control ground injection heating and heat preservation system, which comprises an oil sludge profile control agent preparation device, a circulating heating device, a filtering device and an injection device, wherein the oil sludge profile control agent preparation device is connected with the circulating heating device through a pipeline; the oil sludge profile control agent preparation device comprises a first heating assembly and a first heat preservation assembly; the filtering device comprises a second heating component and a second heat preservation component. The invention also provides a high-pour-point oil sludge profile control ground injection heating and heat preservation method, which comprises the following steps: 1) preparing an oil sludge solution: 2) preparing an oil sludge profile control agent: 3) cyclic heating oil sludge profile control agent: 4) filtered and injected into the service well. The invention has five heating and heat-preserving processes on the ground, so that the high-pour-point oil is injected into the well in a good flow state, the high-efficiency implementation of the high-pour-point oil sludge profile control well is ensured, the harmless treatment of the discharge of the oil sludge is realized, and the oil sludge profile control well plays a positive role in cost reduction and efficiency improvement of the oil field.)

1. A high-pour-point oil sludge profile control ground injection heating and heat preservation system is characterized by comprising an oil sludge profile control agent preparation device, a circulating heating device, a filtering device and an injection device;

the discharge hole of the oil sludge profile control agent preparation device is connected with the feed hole of the circulating heating device, the discharge hole of the circulating heating device is respectively connected with the feed hole of the oil sludge profile control agent preparation device and the feed hole of the filtering device, the discharge hole of the filtering device is connected with the injection device, and the injection device injects materials in the filtering device into the measure well; wherein the content of the first and second substances,

the oil sludge profile control agent preparation device comprises a first heating component and a first heat preservation component;

the filtering device comprises a second heating component and a second heat preservation component.

2. The high pour-point oil sludge profile control ground injection heating and heat preservation system according to claim 1, wherein the oil sludge profile control agent preparation device further comprises a stirring tank; wherein, a heating element locates the agitator tank inner chamber, and a heat preservation subassembly is located the agitator tank outside.

3. The high pour point oil sludge profile control ground injection heating and heat preservation system according to claim 2, wherein the filtering device further comprises a filtering tank and a filtering assembly; wherein, the second heating element and the filter element are arranged in the inner cavity of the filter tank, and the second heat-preserving element is arranged outside the filter tank.

4. The high pour point sludge profile control ground injection heating and holding system of claim 3, wherein the first heating assembly and the second heating assembly each comprise a coil.

5. The high pour point oil sludge profile control ground injection heating and thermal insulation system of claim 3, wherein the first thermal insulation assembly and the second thermal insulation assembly each comprise a thermal insulation layer.

6. A high pour-point oil sludge profile control ground injection heating and heat preservation system as claimed in claim 4, wherein the circulation heating device comprises a water jacket furnace and a liquid guide pump connected with a discharge port of the water jacket furnace, wherein the water heated in the water jacket furnace is connected with the coil pipe through a circulation water pipeline to provide hot water for the coil pipe; and the oil sludge profile control agent enters the water jacket furnace from the oil sludge profile control agent preparation device and is heated and then is respectively pumped into the oil sludge profile control agent preparation device and the filtering device through the liquid guide pump.

7. The high pour-point oil sludge profile control ground injection heating and heat preservation system according to claim 6, further comprising a water replenishing device, wherein the water replenishing device replenishes circulating water for the water jacket furnace through a circulating water pipeline, and hot water in the coil enters the water replenishing device after being subjected to heat exchange and temperature reduction.

8. The system of claim 7, wherein a bypass line is further included in a circulating water line between the coil pipe in the filtering tank and the water replenishing device, the bypass line extends to the filtering assembly, and a port of the bypass line includes a control switch for providing high-temperature shower water for the filtering assembly to assist in filtering the oil sludge.

9. The high pour point oil sludge profile control ground injection heating and heat preservation system according to claim 1, wherein a discharge port of the oil sludge profile control agent preparation device is connected with a feed port of the circulation heating device through a first heat preservation pipeline.

10. The high pour point oil sludge profile control ground injection heating and heat preservation system according to claim 1, wherein a discharge port of the circulation heating device is respectively connected with a feed port of the oil sludge profile control agent preparation device and a feed port of the filtering device through a second heat preservation pipeline.

11. The high pour point oil sludge profile control ground injection heating and heat preservation system according to claim 1, wherein the injection device is a slurry pump or a cement truck.

12. The high pour point sludge profile control ground injection heating and insulation system of claim 11, wherein the discharge port of the filter device is connected to the slurry pump through a third insulation line.

13. The high pour point sludge profile control surface injection heating and holding system of claim 12, wherein the mud pump pumps material from the filtration unit through a fourth holding line into a service well.

14. The high-pour-point oil sludge profile control ground injection heating and heat preservation method is characterized by adopting the high-pour-point oil sludge profile control ground injection heating and heat preservation system as defined in any one of claims 1 to 13, and comprises the following steps:

1) preparing an oil sludge solution:

mixing hot water with the water temperature not lower than 75 ℃ with high-condensation oil sludge to obtain an oil sludge solution;

2) preparing an oil sludge profile control agent:

inputting the oil sludge solution into an oil sludge profile control agent preparation device, adding an additive, heating by adopting a heating assembly, preserving heat by adopting a heat preservation assembly, and stirring under a certain temperature condition to obtain an oil sludge profile control agent;

3) cyclic heating oil sludge profile control agent:

inputting the oil sludge profile control agent into a circulating heating device for circulating heating, inputting part of the heated oil sludge profile control agent into an oil sludge profile control agent preparation device, and inputting part of the heated oil sludge profile control agent into a filtering device;

4) filtration and injection into the disposal well:

the heated oil sludge profile control agent is filtered by a filtering device and is injected into a measure well by an injection device.

Technical Field

The invention relates to the technical field of oil extraction. More particularly, the invention relates to a high-pour-point oil sludge profile control ground injection heating and heat preservation system and a method.

Background

At present, the annual treatment of oil-containing sewage in oil fields in China has high content, the annual production of oil sludge is large, the treatment of the oil sludge has high cost and is easy to cause environmental pollution, and how to effectively utilize the oil sludge is particularly important for changing waste into treasure.

The oil sludge profile control technology is particle blocking physical profile control, the mechanism of which is mainly to improve fluidity ratio and physical blocking and has the functions of adsorption and residual resistance. The dirty oil sludge with high pour-point oil content has complex components and poor fluidity, so the oil sludge profile control technology needs to be researched and improved to realize deep profile control of the high pour-point oil sludge, control the plunging speed of injected water in a high permeable stratum, explore the feasibility of increasing the yield of a buried hill fracture oil reservoir and realize the reutilization of high pour-point oil sludge resources. However, because of the properties of high pour point oils, the solidification point is high and the oil is solid at room temperature, and therefore, heating and heat preservation measures must be taken during injection.

Therefore, the invention provides a high-pour-point oil sludge profile control ground injection heating and heat preservation system and a method, which aim to solve the problems.

Disclosure of Invention

The invention aims to provide a high-pour-point oil sludge profile control ground injection heating and heat preservation system, which solves the problem that high-pour-point oil sludge cannot be injected normally at normal temperature.

The invention also aims to provide a high-pour-point oil sludge profile control ground injection heating and heat preservation method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high pour-point oil sludge profile control ground injection heating and heat preservation system comprises: the oil sludge profile control agent preparation device, the circulating heating device, the filtering device and the injection device;

the discharge hole of the oil sludge profile control agent preparation device is connected with the feed hole of the circulating heating device, the discharge hole of the circulating heating device is respectively connected with the feed hole of the oil sludge profile control agent preparation device and the feed hole of the filtering device, the discharge hole of the filtering device is connected with the injection device, and the injection device injects materials in the filtering device into the measure well;

the oil sludge profile control agent preparation device comprises a first heating assembly and a first heat preservation assembly;

the filtering device comprises a second heating component and a second heat preservation component.

According to the invention, the oil sludge profile control agent preparation device is used for preparing an oil sludge profile control agent from an oil sludge solution containing high pour point oil sludge; the circulating heating device is used for circularly heating the oil sludge profile control agent, and the heated oil sludge profile control agent is respectively input into the oil sludge profile control agent preparation device and the filtering device; the filtering device is used for filtering the heated oil sludge profile control agent; the first heating assembly is used for providing the temperature required by preparing the oil sludge profile control agent, and the temperature is not lower than 55 ℃; the first heat preservation assembly is used for enabling the temperature of the oil sludge profile control agent in the oil sludge profile control agent preparation device to be not lower than 50 ℃, so that the uniform preparation and smooth injection of the profile control agent are realized; the second heating assembly is used for enabling the temperature of the oil sludge profile control agent in the oil sludge profile control agent preparation device to be not lower than 75 ℃, and the second heat preservation assembly is used for reducing heat loss of the oil sludge profile control agent and guaranteeing that the temperature of the oil sludge profile control agent in a final injection well is not lower than 70 ℃.

Preferably, the oil sludge profile control agent preparation device further comprises a stirring tank; the first heating assembly is arranged in the inner cavity of the stirring tank, and the first heat-preserving assembly is arranged outside the stirring tank; the stirring tank is used for adding polyacrylamide, a cross-linking agent and a dispersing agent into the oil sludge solution to prepare an oil sludge profile control agent.

Preferably, the inner cavity of the stirring tank is also provided with a stirrer.

Preferably, the filtering device further comprises a filtering tank and a filtering component; wherein, the second heating element and the filter element are arranged in the inner cavity of the filter tank, and the second heat-preserving element is arranged outside the filter tank.

Preferably, the filter assembly comprises a filter screen; the filter screen is used for filtering the heated oil sludge profile control agent, and filtering out oil blocks and other impurities which are not completely melted.

Preferably, the first heating assembly and the second heating assembly each comprise a coil.

Preferably, the first heat-insulating component and the second heat-insulating component both comprise heat-insulating layers.

Preferably, the insulation layer comprises insulation cotton.

Preferably, the circulating heating device comprises a water jacket furnace and a liquid guide pump connected with a discharge port of the water jacket furnace, wherein water heated in the water jacket furnace is connected with the coil pipe through a circulating water pipeline to provide hot water for the coil pipe; and the oil sludge profile control agent enters the water jacket furnace from the oil sludge profile control agent preparation device and is heated and then is respectively pumped into the oil sludge profile control agent preparation device and the filtering device through the liquid guide pump.

Preferably, the high pour-point oil sludge profile control ground injection heating heat preservation system further comprises a water supplementing device, the water supplementing device is used for supplementing circulating water to the water jacket furnace through a circulating water pipeline, and the hot water in the coil pipe enters the water supplementing device after being cooled through heat exchange.

Preferably, the coil pipe in the filtering tank to the circulating water pipeline between the water replenishing devices further comprises a bypass pipeline, the bypass pipeline extends to the position of the filtering component, and a port of the bypass pipeline comprises a control switch, so as to provide high-temperature spray water for the filtering component and assist in filtering oil sludge.

Preferably, the water replenishing device comprises a water replenishing tank.

Preferably, the discharge hole of the oil sludge profile control agent preparation device is connected with the feed hole of the circulation heating device through a first heat preservation pipeline.

Preferably, the discharge hole of the circulation heating device is respectively connected with the feed inlet of the oil sludge profile control agent preparation device and the feed inlet of the filtering device through a second heat preservation pipeline.

Preferably, the injection device is a mud pump or a cement truck.

Preferably, the discharge port of the filtering device is connected with the mud pump through a third heat preservation pipeline.

Preferably, the mud pump pumps the material in the filter unit through a fourth insulated line into the service well.

Preferably, the first heat-preservation pipeline, the second heat-preservation pipeline, the third heat-preservation pipeline and the fourth heat-preservation pipeline are all insulated by adopting electric heating tapes and used for reducing heat loss of pipelines in the process of conveying the profile control liquid, so that the heat loss of the heated profile control liquid is minimized; especially in winter construction, if the heat insulation cotton is not used for heat insulation, the temperature of the profile control liquid after being heated may not meet the injection requirement due to heat loss.

The invention also provides a high-pour-point oil sludge profile control ground injection heating and heat preservation method, which adopts the system and comprises the following steps:

1) preparing an oil sludge solution:

mixing hot water with the water temperature not lower than 75 ℃ with high-condensation oil sludge to obtain an oil sludge solution;

2) preparing an oil sludge profile control agent:

inputting the oil sludge solution into an oil sludge profile control agent preparation device, adding an additive, heating by adopting a heating assembly, preserving heat by adopting a heat preservation assembly, and stirring under a certain temperature condition to obtain an oil sludge profile control agent;

3) cyclic heating oil sludge profile control agent:

inputting the oil sludge profile control agent into a circulating heating device for circulating heating, inputting part of the heated oil sludge profile control agent into an oil sludge profile control agent preparation device, and inputting part of the heated oil sludge profile control agent into a filtering device;

4) filtration and injection into the disposal well:

the heated oil sludge profile control agent is filtered by a filtering device and is injected into a measure well by an injection device.

Preferably, the mass ratio of the hot water to the high pour point oil sludge in the step 1) is 2: 1-3: 1, and the mixing ratio is determined by the temperature, concentration and the like of the sludge transported to the site.

Preferably, the additives in step 2) include polyacrylamide, a cross-linking agent and a dispersing agent; wherein the mass ratio of the oil sludge solution, the polyacrylamide, the cross-linking agent and the dispersing agent is 450:1:3:1, and the optimal profile control effect can be achieved by the ratio.

Preferably, the temperature condition during stirring in the step 2) is 50-55 ℃, so that the fluidity of the profile control liquid is ensured.

Preferably, the stirring speed in the step 2) is 100 revolutions per minute, and the oil sludge solution, the polyacrylamide, the cross-linking agent and the dispersing agent are fully mixed.

Preferably, the temperature in the circulating heating device in the step 3) is 70-75 ℃, so that the solidification and the formation blockage caused by the solidification can be avoided in the process of injecting the profile control liquid into the formation.

The invention has the following beneficial effects:

the high-pour-point oil sludge profile control ground injection heating and heat preservation system provided by the invention has the advantages that through five ground heating and heat preservation processes, high-pour-point oil is injected into a well in a good flow state, the high-pour-point oil sludge profile control well is ensured to be efficiently implemented, the harmless treatment of sludge discharge is realized, and positive effects on cost reduction and efficiency improvement of an oil field are achieved.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 shows a schematic diagram of a high pour point sludge profile control ground injection heating and holding system of the present invention;

the system comprises a first heating assembly, a first heat preservation assembly, a stirring tank, a stirrer, a water jacket furnace, a 22 liquid guide pump, a second heating assembly, a second heat preservation assembly, a filtering tank, a 34 filtering assembly, a filtering screen, a 41-slurry pump, a 5-water supplementing device, a first heat preservation pipeline, a second heat preservation pipeline, a third heat preservation pipeline, a 8-third heat preservation pipeline and a fourth heat preservation pipeline, wherein the first heating assembly is 11-the first heating assembly, the stirring tank is 13-the stirrer, the filtering tank is 21-the water jacket furnace, the second heat preservation assembly is 31-the filtering tank, the filtering tank is 34-the filtering assembly, the filtering screen is 35-the 41-slurry pump, the 5-water supplementing device is 6-the first heat preservation pipeline, the second heat preservation pipeline is 7-the third heat preservation pipeline, and the 9-the fourth heat preservation pipeline.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

The invention provides a high-pour-point oil sludge profile control ground injection heating and heat preservation system, which solves the problem that high-pour-point oil sludge cannot be normally injected at normal temperature because the high-pour-point oil has oil properties and high freezing point and is in a solid state at normal temperature, and heating and heat preservation measures must be taken on the ground during injection.

Specifically, with reference to fig. 1, a high pour point oil sludge profile control ground injection heating and heat preservation system includes: the oil sludge profile control agent preparation device, the circulating heating device, the filtering device and the injection device;

the discharge hole of the oil sludge profile control agent preparation device is connected with the feed hole of the circulating heating device, the discharge hole of the circulating heating device is respectively connected with the feed hole of the oil sludge profile control agent preparation device and the feed hole of the filtering device, the discharge hole of the filtering device is connected with the injection device, and the injection device injects materials in the filtering device into the measure well; wherein the content of the first and second substances,

the oil sludge profile control agent preparation device comprises a first heating component 11 and a first heat preservation component 12;

the filtering device comprises a second heating component 31 and a second heat preservation component 32.

According to the invention, the oil sludge profile control agent preparation device is used for preparing an oil sludge profile control agent from an oil sludge solution containing high pour point oil sludge; the circulating heating device is used for circularly heating the oil sludge profile control agent, and the heated oil sludge profile control agent is respectively input into the oil sludge profile control agent preparation device and the filtering device; the filtering device is used for filtering the heated oil sludge profile control agent; the first heating assembly is used for providing the temperature required by preparing the oil sludge profile control agent, and the temperature is not lower than 55 ℃; the first heat preservation assembly is used for enabling the temperature of the oil sludge profile control agent in the oil sludge profile control agent preparation device to be not lower than 50 ℃, so that the uniform preparation and smooth injection of the profile control agent are realized; the second heating element is used for preparing the temperature of the oil sludge profile control agent in the device with the oil sludge profile control agent, and is not lower than 75 ℃, the second heat preservation element is used for reducing the heat loss of the oil sludge profile control agent, and the temperature of the oil sludge profile control agent in the final injection well is ensured to be not lower than 70 ℃.

In order to better prepare the oil sludge profile control agent, in a preferred embodiment of the invention, the oil sludge profile control agent preparation device further comprises a stirring tank 13; the first heating assembly 11 is arranged in an inner cavity of the stirring tank 13, and the first heat-preserving assembly 12 is arranged outside the stirring tank 13; the stirring tank is used for adding polyacrylamide, a cross-linking agent and a dispersing agent into the oil sludge solution to prepare an oil sludge profile control agent. It should be understood by those skilled in the art that the preparation method of the oil sludge profile control agent is a conventional method, and the detailed description of the invention is omitted.

In addition, in a preferred embodiment of the present invention, a stirrer 14 is further disposed in the inner cavity of the stirring tank 13, so as to further improve the stirring effect.

In order to enhance the filtering effect and further remove oil cake and other impurities, in a preferred embodiment of the present invention, the filtering apparatus further comprises a filtering tank 33 and a filtering assembly 34; the second heating component 31 and the filtering component 34 are arranged in the inner cavity 33 of the filter tank, and the second heat-preserving component 32 is arranged outside the filter tank 33; further, the filter assembly 34 includes a filter screen 35; the filter screen is used for filtering the heated oil sludge profile control agent, so that the filtering effect of oil blocks and other impurities which are not completely melted is improved.

In a preferred embodiment of the present invention, the first heating assembly 11 and the second heating assembly 31 each comprise a coil. The coil in the stirred tank is heated to ensure the fluidity of the oil sludge profile control agent so as to ensure that the oil sludge profile control agent can smoothly enter the pipeline. The heating of the coil of the filter tank is to supplement the heat loss when the oil sludge profile control agent enters the filter tank after being filtered.

In a preferred embodiment of the present invention, the first thermal insulation assembly 12 and the second thermal insulation assembly 32 each include an insulation layer; further, the heat-insulating layer comprises heat-insulating cotton. The heat preservation cotton mainly plays a role in heat preservation and reduces heat loss in the process of conveying the profile control liquid.

In a preferred embodiment of the invention, the circulation heating device comprises a water jacket furnace 21 and a liquid guide pump 22 connected with a discharge port of the water jacket furnace 21, wherein the water jacket furnace 21 is used for circularly heating the oil sludge profile control agent, is a key of the whole heating system, and can provide the highest temperature required by the oil sludge profile control agent; the water heated in the water jacket furnace 21 is connected with the coil pipe through a circulating water pipeline to provide hot water for the coil pipe; the oil sludge profile control agent enters the water jacket furnace 21 from the oil sludge profile control agent preparation device and is heated and then is respectively pumped into the oil sludge profile control agent preparation device and the filtering device through the liquid guide pump 22.

In a preferred embodiment of the present invention, the high-solidity oil sludge profile control ground injection heating and heat preservation system further includes a water replenishing device 5, the water replenishing device 5 replenishes circulating water to the water jacket furnace 21 through a circulating water line, and hot water in the coils of the first heating assembly 11 and the second heating assembly 31 enters the water replenishing device 5 after being cooled by heat exchange.

Further, the coil of the second heating element 31 is connected to the circulating water line between the water replenishing devices 5, and a bypass line is further included, the bypass line extends to the position of the filtering element 34, and a control switch is included at the port, so as to provide high-temperature shower water for the filtering element 34 and assist in filtering oil sludge. When hot water is needed to be added for spraying, the control switch is turned on. Further, the water replenishing device 5 comprises a water replenishing tank.

In addition, in order to reduce the heat loss of the pipeline in the material conveying process, in a preferred embodiment of the invention, the discharge port of the oil sludge profile control agent preparation device is connected with the feed port of the circulation heating device through a first heat preservation pipeline 6; and the discharge hole of the circulating heating device is respectively connected with the feed inlet of the oil sludge profile control agent preparation device and the feed inlet of the filtering device through a second heat preservation pipeline 7.

In the present invention, a slurry pump 41 or a cement truck can be used as an injection device to inject the material in the filter into the service well.

In a preferred embodiment of the present invention, the discharge port of the filtering device is connected to the mud pump 41 through a third insulated line 8; the mud pump 41 pumps the material in the filter unit through the fourth insulated line 9 into the service well.

Further, the first heat preservation pipeline 6, the second heat preservation pipeline 7, the third heat preservation pipeline 8 and the fourth heat preservation pipeline 9 are all insulated by electric heating tapes and used for reducing heat loss of pipelines in the process of conveying the profile control liquid.

As another aspect of the present invention, the present invention further provides a high-pour-point oil sludge profile control ground injection heating and heat preservation method, which adopts the above system, and includes the following steps:

1) preparing an oil sludge solution:

mixing hot water with the water temperature not lower than 75 ℃ with high-pour-point oil sludge according to the mass ratio of 2: 1-3: 1 to obtain an oil sludge solution; hot water mixing is carried out in advance when the oil sludge is discharged, so that the preliminary dispersion of the oil sludge is realized;

2) preparing an oil sludge profile control agent:

inputting the oil sludge solution into an oil sludge profile control agent preparation device, adding an additive, heating by adopting a heating assembly, preserving heat by adopting a heat preservation assembly, and stirring under a certain temperature condition to obtain an oil sludge profile control agent;

3) cyclic heating oil sludge profile control agent:

inputting the oil sludge profile control agent into a circulating heating device for circulating heating, inputting part of the heated oil sludge profile control agent into an oil sludge profile control agent preparation device, and inputting part of the heated oil sludge profile control agent into a filtering device;

4) filtration and injection into the disposal well:

the heated oil sludge profile control agent is filtered by a filtering device and is injected into a measure well by an injection device.

Preferably, the additives in step 2) include polyacrylamide, a cross-linking agent and a dispersing agent; the mass ratio of the oil sludge solution to the polyacrylamide to the cross-linking agent to the dispersing agent is 450:1:3:1, and experiments prove that the optimal profile control effect can be achieved by the ratio.

Preferably, the temperature condition during stirring in the step 2) is 50-55 ℃, so that the fluidity of the profile control liquid is ensured.

Preferably, the stirring speed in the step 2) is 100 revolutions per minute, and the oil sludge solution, the polyacrylamide, the cross-linking agent and the dispersing agent are fully mixed.

Preferably, the temperature in the circulating heating device in the step 3) is 70-75 ℃, so that the solidification and the formation blockage caused by the solidification can be avoided in the process of injecting the profile control liquid into the formation.

In conclusion, the invention injects the high-condensation oil into the well under a good flow state through five heating and heat-preserving processes on the ground, ensures the high-efficiency implementation of the high-condensation oil sludge profile control well, realizes the harmless treatment of the sludge discharge, and plays a positive role in cost reduction and efficiency improvement of the oil field.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.