SAGD High-Temperature Electrical Submersible Pump Well Selection Method

Abstract

The present invention provides a method for selecting wells for SAGD high-temperature electrical submersible pumps. The method for selecting wells for SAGD high-temperature electrical submersible pumps includes: Step S1: Collecting and recording the well data of multiple faulty wells in a preset area; Step S2: Setting multiple well selection conditions according to the performance parameters of the high-temperature electrical submersible pump; Step S3: Conducting a preliminary screening of the multiple faulty wells in sequence according to a single well selection condition; Step S4: Performing mechanical analysis on the faulty wells selected after the preliminary screening using mechanical analysis software for secondary screening; Step S5: Conducting a trial lowering on the faulty wells selected after the secondary screening using a simulated pipe string to determine the faulty wells where the high-temperature electrical submersible pump will ultimately be lowered. The present invention effectively solves the problems of low well selection efficiency for electrical submersible pumps and easy damage to electrical submersible pumps in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of SAGD oil production, and more specifically, to a method for selecting wells for SAGD high-temperature electrical submersible pumps. Background Art

[0002] Currently, the development of shallow viscous ultra-heavy oil reservoirs in the Xinjiang Oilfield mainly uses the SAGD production process. However, the intermittent pumping force generated by the reciprocating motion of the sucker rod up and down will cause pressure fluctuations between the SAGD injection and production wells, which is not conducive to regulation. Moreover, there are problems such as oil leakage from the stuffing box at the wellhead, frequent replacement, and high labor intensity of workers, resulting in the inapplicability of the sucker rod pump.

[0003] In the prior art, in order to improve the above problems, a high-temperature electrical submersible pump lifting system is used to lift the sucker rod. The electrical submersible pump lifting system operates smoothly during production, maintains the pressure difference balance between the SAGD injection and production wells, and at the same time, the wellhead is sealed for gathering and transportation, avoiding problems such as oil leakage from the stuffing box at the wellhead, and can meet the production requirements of SAGD wells. Among them, the electrical submersible pump lifting system has strict requirements for well conditions such as wellbore trajectory, wellbore space, pump setting depth, oil well production, and downhole temperature. If the well selection is inappropriate, the electrical submersible pump lifting system cannot be installed, or it cannot operate normally after installation, or even fails frequently after operation and cannot maintain normal production.

[0004] However, in the prior art, the selection of oil wells is usually carried out by directly lowering the electrical submersible pump, that is, the staff directly lowers the electrical submersible pump into the oil well. If the electrical submersible pump cannot be lowered to the preset position, a new well is selected. This not only reduces the well selection efficiency, but also easily damages the electrical submersible pump and affects its service life. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for selecting wells for SAGD high-temperature electrical submersible pumps to solve the problems of low well selection efficiency and easy damage to the electrical submersible pump in the prior art.

[0006] To achieve the above purpose, the present invention provides a method for selecting wells for SAGD high-temperature electrical submersible pumps, including: Step S1: Collect and record the well data of multiple faulty oil wells in a preset area; Step S2: Set multiple well selection conditions according to the performance parameters of the high-temperature electrical submersible pump; Step S3: Conduct a preliminary screening of the multiple faulty oil wells according to a single well selection condition in sequence; Step S4: Use mechanical analysis software to conduct a mechanical analysis of the faulty oil wells selected after the preliminary screening for a secondary screening; Step S5: Use a simulated pipe string to conduct a trial lowering of the faulty oil wells selected after the secondary screening to determine the faulty oil wells for finally lowering the high-temperature electrical submersible pump.

[0007] Further, in step S1, the oil well data includes the oil well status, and / or the oil well production, and / or the pump setting temperature, and / or the length of the pump setting stabilizer section, and / or the pump setting depth, and / or the maximum dogleg severity of the section above the pump setting.

[0008] Further, in step S2, the multiple well selection conditions include: whether well workover is possible. When the oil well status of the faulty oil well is steam channeling, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well; and / or a production threshold. When the oil well production of the faulty oil well is less than the lower limit of the production threshold or greater than the upper limit of the production threshold, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well; and / or a temperature threshold. When the pump setting temperature of the faulty oil well is greater than the temperature threshold, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well; and / or a threshold for the length of the pump setting stabilizer section. When the length of the pump setting stabilizer section of the faulty oil well is less than the threshold for the length of the pump setting stabilizer section, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well; and / or a pump setting depth threshold. When the sum of the pump setting depth of the faulty oil well and the preset length is greater than the pump setting depth threshold, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well; and / or a threshold for the maximum dogleg severity of the section above the pump setting. When the maximum dogleg severity of the section above the pump setting of the faulty oil well is greater than the threshold for the maximum dogleg severity of the section above the pump setting, the high-temperature electric submersible pump cannot perform well workover operations on the faulty oil well.

[0009] Further, the lower limit of the production threshold is consistent with the minimum displacement of the high-temperature electric submersible pump, and the upper limit of the production threshold is consistent with the maximum displacement of the high-temperature electric submersible pump.

[0010] Further, the temperature threshold is equal to the maximum temperature resistance value of the high-temperature electric submersible pump.

[0011] Further, the threshold for the length of the pump setting stabilizer section is equal to the overall length of the high-temperature electric submersible pump.

[0012] Further, the pump setting depth threshold is equal to the cable length of the high-temperature electric submersible pump, and the preset length is greater than or equal to 30m and less than or equal to 50m.

[0013] Further, the threshold for the maximum dogleg severity of the section above the pump setting is less than or equal to 13.55° / 30m.

[0014] Further, in step S4, the model of the high-temperature electric submersible pump is imported into the model of the faulty oil well screened out after the preliminary screening, and through simulation to verify whether the high-temperature electric submersible pump can pass the maximum dogleg severity of the section above the pump setting of the faulty oil well. If the high-temperature electric submersible pump can pass the maximum dogleg severity of the section above the pump setting, the high-temperature electric submersible pump can perform well workover operations on the faulty oil well.

[0015] Further, in step S5, when the simulation string is successfully tested in the faulty oil well screened out after the secondary screening, the faulty oil well is the faulty oil well for finally installing the high-temperature electric submersible pump.

[0016] Applying the technical solution of the present invention, when selecting a faulty oil well, first collect the oil well data of multiple faulty oil wells in a preset area and record them, and then set multiple well selection conditions according to the performance parameters of the high-temperature electric submersible pump. Then, conduct a preliminary screening of multiple faulty oil wells in sequence according to a single well selection condition, and then use mechanical analysis software to conduct a mechanical analysis of the faulty oil wells screened after the preliminary screening for a secondary screening. Finally, use a simulated pipe string to conduct a trial run on the faulty oil wells screened after the secondary screening to determine the faulty oil wells into which the high-temperature electric submersible pump will ultimately be lowered, thereby making the selection of the faulty oil wells into which the high-temperature electric submersible pump is lowered more accurate and effective, so as to ensure that the ultimately screened faulty oil wells can meet the requirements for lowering the high-temperature electric submersible pump.

[0017] Compared with the direct lowering method in the prior art, the SAGD high-temperature electric submersible pump well selection method in the present application makes the selection of faulty oil wells for lowering the high-temperature electric submersible pump more effective, thereby avoiding structural damage to the high-temperature electric submersible pump lowered into the faulty oil well and affecting the normal use of the electric submersible pump, and solving the problems of low well selection efficiency for the electric submersible pump and easy damage to the electric submersible pump in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 Shows a flowchart of an embodiment of the SAGD high-temperature electric submersible pump well selection method according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0021] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0022] In the present invention, unless otherwise stated, the orientation words such as "upper, lower" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction; similarly, for the sake of easy understanding and description, "left, right" are generally left and right as shown in the drawings; "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words do not limit the present invention.

[0023] To solve the problems of low well selection efficiency for electrical submersible pumps and easy damage to electrical submersible pumps in the prior art, the present application provides a well selection method for SAGD high-temperature electrical submersible pumps.

[0024] As Figure 1 shown, the well selection method for SAGD high-temperature electrical submersible pumps includes:

[0025] Step S1: Collect the well data of multiple faulty wells in a preset area and record them;

[0026] Step S2: Set multiple well selection conditions according to the performance parameters of the high-temperature electrical submersible pump;

[0027] Step S3: Conduct a preliminary screening of multiple faulty wells according to a single well selection condition in sequence;

[0028] Step S4: Use mechanical analysis software to conduct mechanical analysis on the faulty wells screened out after the preliminary screening for secondary screening;

[0029] Step S5: Use a simulated tubing string to conduct a trial run on the faulty wells screened out after the secondary screening to determine the faulty wells where the high-temperature electrical submersible pump will finally be lowered.

[0030] Applying the technical solution of this embodiment, when selecting faulty wells, first collect the well data of multiple faulty wells in a preset area and record them, and then set multiple well selection conditions according to the performance parameters of the high-temperature electrical submersible pump. After that, conduct a preliminary screening of multiple faulty wells according to a single well selection condition in sequence, and then use mechanical analysis software to conduct mechanical analysis on the faulty wells screened out after the preliminary screening for secondary screening. Finally, use a simulated tubing string to conduct a trial run on the faulty wells screened out after the secondary screening to determine the faulty wells where the high-temperature electrical submersible pump will finally be lowered, thereby making the selection of faulty wells where the high-temperature electrical submersible pump is lowered more accurate and effective, so as to ensure that the finally screened faulty wells can meet the requirements for lowering the high-temperature electrical submersible pump.

[0031] Compared with the direct lowering method in the prior art, the SAGD high-temperature electrical submersible pump well selection method in this embodiment makes the selection of faulty wells where the high-temperature electrical submersible pump is lowered more effective, thereby avoiding structural damage to the high-temperature electrical submersible pump lowered into the faulty well and affecting the normal use of the electrical submersible pump, and solving the problems of low well selection efficiency for electrical submersible pumps and easy damage to electrical submersible pumps in the prior art.

[0032] In this embodiment, SAGD, short for Steam Assisted Gravity Drainage, is an oil production method in which steam is injected into the reservoir from a vertical well or a horizontal well above a horizontal production well near the bottom of the reservoir, and the heated crude oil and steam condensate are produced from the horizontal well at the bottom of the reservoir.

[0033] In this embodiment, the well selection method for SAGD high-temperature electrical submersible pumps can meet the requirements for the installation and startup operation of SAGD well high-temperature electrical submersible pumps.

[0034] In this embodiment, in step S1, the well data includes well status, well production, pump setting temperature, pump setting stabilized inclination section length, pump setting depth, and maximum dogleg severity of the section above the pump setting. Thus, in step S1, after collecting and recording the well data of multiple faulty wells in the preset area, the influencing factors are determined. Among them, the influencing factors include: drilling factors, workover factors, and oil production factors. Specifically, the influencing factors include the following parameters: well status, well production, pump setting temperature, pump setting stabilized inclination section length, pump setting depth, and maximum dogleg severity of the section above the pump setting. Among them, the well status includes rod sticking, sand sticking, sand plugging, steam channeling, liquid discharging, etc.

[0035] Specifically, when the well status is steam channeling, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well.

[0036] It should be noted that the parameters included in the influencing factors are not limited to this, and can be adjusted accordingly according to the actual situation.

[0037] In this embodiment, the well data of 12 faulty wells in the Fengcheng SAGD block in Xinjiang is collected, and the specific values are shown in Table 1.

[0038] Table 1 Statistical table of faulty wells in Fengcheng SAGD, Xinjiang

[0039]

[0040]

[0041] In this embodiment, in step S2, the multiple well selection conditions include whether workover can be performed, production threshold, temperature threshold, pump setting stabilized inclination section length threshold, pump setting depth threshold, and maximum dogleg severity threshold of the section above the pump setting. Among them, when the well status of the faulty well is steam channeling, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well. When the well production of the faulty well is less than the lower limit of the production threshold or higher than the upper limit of the production threshold, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well. When the pump setting temperature of the faulty well is greater than the temperature threshold, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well. When the pump setting stabilized inclination section length of the faulty well is less than the pump setting stabilized inclination section length threshold, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well. When the sum of the pump setting depth of the faulty well and the preset length is greater than the pump setting depth threshold, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well. When the maximum dogleg severity of the section above the pump setting of the faulty well is greater than the maximum dogleg severity threshold of the section above the pump setting, the high-temperature electrical submersible pump cannot perform a workover operation on this faulty well.

[0042] In this embodiment, the performance parameters of the high-temperature electric submersible pump include: temperature resistance level, displacement range, length, and cable length; the well selection threshold parameters include: whether well workover is possible, production threshold, temperature threshold, threshold for the length of the stable-inclination section of the pump setting depth, threshold for the pump setting depth, and threshold for the maximum dogleg severity of the section above the pump setting. Step S2 includes the following steps:

[0043] Step S21: Analyze the operating status of the faulty well, and screen out the faulty wells with workover conditions according to whether well workover is possible;

[0044] Step S22: Compare the well production of the faulty well with the displacement range of the high-temperature electric submersible pump, and screen out the faulty wells with matching production according to the production threshold;

[0045] Step S23: Compare the pump setting temperature of the faulty well with the temperature resistance level of the high-temperature electric submersible pump, and screen out the faulty wells with pump setting temperature less than or equal to the temperature resistance level of the high-temperature electric submersible pump according to the temperature threshold;

[0046] Step S24: Compare the length of the stable-inclination section of the pump setting of the faulty well with the length of the high-temperature electric submersible pump, and screen out the faulty wells with the length of the stable-inclination section of the pump setting greater than the length of the high-temperature electric submersible pump according to the threshold for the length of the stable-inclination section;

[0047] Step S25: Compare the pump setting depth of the faulty well with the cable length of the high-temperature electric submersible pump, and screen out the faulty wells with cable length greater than or equal to 30 m above the pump setting depth according to the threshold for the pump setting depth;

[0048] Step S26: Compare the maximum dogleg severity of the section above the pump setting of the faulty well, and screen out the faulty wells with the maximum dogleg severity of the section above the pump setting less than or equal to 13.55° / 30 m according to the threshold for the maximum dogleg severity of the section above the pump setting.

[0049] In this way, the faulty wells screened out through the above steps meet the preliminary screening conditions. Among them, the production threshold is consistent with the minimum displacement of the high-temperature electric submersible pump, the temperature threshold is equal to the maximum temperature resistance value of the high-temperature electric submersible pump, and the threshold for the length of the stable-inclination section of the pump setting is equal to the overall length of the high-temperature electric submersible pump.

[0050] Optionally, the threshold for the pump setting depth is equal to the cable length of the high-temperature electric submersible pump, and the preset length is greater than or equal to 30 m and less than or equal to 50 m. In this embodiment, the preset length is 30 m. It should be noted that the size setting of the preset length is not limited to this and can be adjusted according to production.

[0051] In this embodiment, the threshold for the maximum dogleg severity of the section above the pump setting is less than or equal to 13.55° / 30 m. It should be noted that the size setting of the threshold for the maximum dogleg severity of the section above the pump setting is not limited to this and can be adjusted according to production.

[0052] In this embodiment, the steps for preliminary screening according to the single-parameter elimination method are as follows:

[0053] Step S21: Check whether well repair is possible. For Well XX6 and Well XX7, steam channeling makes well repair impossible, so 2 wells are eliminated, and 10 wells remain.

[0054] Step S22: Check against the production limit. The production of Well XX1, Well XX2, Well XX8, Well XX9, and Well XX10 is < 50 t / d, so 5 wells are eliminated, and the production of the remaining wells is in the range of 50 t / d to 200 t / d, and 5 wells remain.

[0055] Step S23: Check against the temperature limit. The pump setting temperature of Well XX5 > 218 °C, so 1 well is eliminated, and 4 wells remain.

[0056] Step S24: Check against the limit of the stable-inclination section length of the pump setting. The stable-inclination section lengths of the pump settings of Well XX3 and Well XX12 are < 11 m, so 2 wells are eliminated, and 2 wells remain.

[0057] Step S25: Check against the limit of the pump setting depth. The cable length of 335 m is more than 30 m longer than the pump settings of Well XX4 and Well XX11, and 2 wells remain.

[0058] Step S26: Check against the limit of the maximum dogleg severity of the section above the pump setting of the oil well. The maximum dogleg severity of the section above the pump setting of Well XX11 > 13.55 ° / 30 m, so 1 well is eliminated, and 1 well remains.

[0059] In this embodiment, in Step S4, the model of the high-temperature electric submersible pump is imported into the model of the fault oil well selected after preliminary screening, and through simulation to verify whether the high-temperature electric submersible pump can pass through the maximum dogleg severity of the section above the pump setting of the fault oil well. If the high-temperature electric submersible pump can pass through the maximum dogleg severity of the section above the pump setting, the high-temperature electric submersible pump can perform well repair operations on the fault oil well. Among them, the mechanical analysis software includes the simulation verification of the passing ability of the high-temperature electric submersible pump entering the well, the performance evaluation after the high-temperature electric submersible pump enters the well, and the simulation evaluation of the operation of the high-temperature electric pump in the stable-inclination section. The secondary screening limits include the passing of the high-temperature electric submersible pump entering the well, the qualified performance after the high-temperature electric submersible pump enters the well, and the normal simulation of the operation of the high-temperature electric pump in the stable-inclination section.

[0060] Specifically, after three-dimensional mechanical analysis and simulation of the electric submersible pump string of Well XX4, it shows that the high-temperature electric submersible pump can pass through the maximum dogleg severity of 13.55 ° / 30 m after entering the well, the performance of the high-temperature electric submersible pump after entering the well is within the acceptable limit, and the simulation of the operation of the high-temperature electric pump in the stable-inclination section is normal.

[0061] In this embodiment, in step S5, when the simulation string is successfully tested in the fault wells selected after the second screening, the fault well is the one where the high-temperature electric submersible pump will ultimately be lowered. Among them, a simulation string with the same outer diameter and the same length as the high-temperature electric submersible pump is processed and tested before the operation, and the ultimately determined fault well is based on the successful testing of the simulation string.

[0062] Specifically, after the simulation string was successfully tested in Well XX4, it was ultimately determined that a high-temperature electric submersible pump would be lowered into Well XX4.

[0063] Specifically, the well selection method for the SAGD high-temperature electric submersible pump in this embodiment is mainly applied to 12 fault wells in the Xinjiang Fengcheng SAGD block. The buried depth of the shallow, viscous, and extra-heavy oil reservoir in Xinjiang Fengcheng is ≤500 m, the oil layer thickness is 10 - 20 m, and SAGD dual horizontal wells are used for development. Steam is injected into the upper horizontal well, and oil is produced from the lower horizontal well. High-temperature electric submersible pumps are used for lifting in SAGD production wells.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0065] When selecting fault wells, first collect and record the well data of multiple fault wells in the preset area, and then set multiple well selection conditions according to the performance parameters of the high-temperature electric submersible pump. Then, conduct a preliminary screening of multiple fault wells in sequence according to a single well selection condition, and then use mechanical analysis software to conduct a mechanical analysis of the fault wells selected after the preliminary screening for a second screening. Finally, use a simulation string to test the fault wells selected after the second screening to determine the fault wells where the high-temperature electric submersible pump will ultimately be lowered, thereby making the selection of the fault wells where the high-temperature electric submersible pump is lowered more accurate and effective, so as to ensure that the ultimately selected fault wells can meet the requirements for lowering the high-temperature electric submersible pump.

[0066] Compared with the direct lowering method in the prior art, the well selection method for the SAGD high-temperature electric submersible pump in this application makes the selection of the fault wells where the high-temperature electric submersible pump is lowered more effective, thereby avoiding structural damage to the high-temperature electric submersible pump lowered into the fault well and affecting the normal use of the electric submersible pump, and solving the problems of low well selection efficiency for the electric submersible pump and easy damage to the electric submersible pump in the prior art.

[0067] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0068] It should be noted that the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for selecting wells for SAGD high-temperature electric submersible pumps, characterized in that, it includes: Step S1: Collect the well data of multiple faulty wells within a preset area and record them; Step S2: Set multiple well selection conditions according to the performance parameters of the high-temperature electric submersible pump; Step S3: Conduct a preliminary screening of the multiple faulty wells in sequence according to a single well selection condition; Step S4: Use mechanical analysis software to conduct mechanical analysis on the faulty wells selected after the preliminary screening for secondary screening; Step S5: Use a simulated tubing string to conduct a trial lowering on the faulty wells selected after the secondary screening to determine the faulty wells for finally lowering the high-temperature electric submersible pump; The multiple well selection conditions include at least one of whether well repair is possible, production threshold, temperature threshold, pump setting stable inclination section length threshold, pump setting depth threshold, and maximum dogleg severity threshold of the section above the pump setting.

2. The method for selecting wells for SAGD high-temperature electric submersible pumps according to claim 1, characterized in that, in the step S1, the well data includes well status, and / or well production, and / or pump setting temperature, and / or pump setting stable inclination section length, and / or pump setting depth, and / or maximum dogleg severity of the section above the pump setting.

3. The method for selecting wells for SAGD high-temperature electric submersible pumps according to claim 1 or 2, characterized in that, in the step S2, the multiple well selection conditions include: Whether well repair is possible. When the well status of the faulty well is steam channeling, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well; and / or Production threshold. When the well production of the faulty well is less than the lower limit of the production threshold or higher than the upper limit of the production threshold, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well; and / or Temperature threshold. When the pump setting temperature of the faulty well is greater than the temperature threshold, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well; and / or Pump setting stable inclination section length threshold. When the pump setting stable inclination section length of the faulty well is less than the pump setting stable inclination section length threshold, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well; and / or Pump setting depth threshold. When the sum of the pump setting depth of the faulty well and the preset length is greater than the pump setting depth threshold, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well; and / or Maximum dogleg severity threshold of the section above the pump setting. When the maximum dogleg severity of the section above the pump setting of the faulty well is greater than the maximum dogleg severity threshold of the section above the pump setting, the high-temperature electric submersible pump cannot perform well repair operations on this faulty well.

4. The method for selecting wells for SAGD high-temperature electric submersible pumps according to claim 3, characterized in that, the lower limit of the production threshold is consistent with the minimum displacement of the high-temperature electric submersible pump, and the upper limit of the production threshold is consistent with the maximum displacement of the high-temperature electric submersible pump.

5. The method for selecting wells for SAGD high-temperature electric submersible pumps according to claim 3, characterized in that, the temperature threshold is equal to the maximum temperature resistance value of the high-temperature electric submersible pump.

6. The method for selecting wells for SAGD high-temperature electric submersible pumps according to claim 3, characterized in that, the pump setting stable inclination section length threshold is equal to the overall length of the high-temperature electric submersible pump.

7. The SAGD high temperature electric submersible pump well selection method according to claim 3, It is characterized in that The pump hanging depth threshold is equal to the cable length of the high temperature electric submersible pump, and the preset length is greater than or equal to 30m and less than or equal to 50m.

8. The SAGD high temperature electric submersible pump well selection method according to claim 3, It is characterized in that The maximum dogleg angle threshold of the well section above the pump hanger is less than or equal to 13.55° / 30m.

9. The SAGD high temperature electric submersible pump well selection method according to claim 1, It is characterized in that In step S4, the model of the high-temperature electric submersible pump is imported into the model of the faulty oil well selected after preliminary screening, and simulation is performed to verify whether the high-temperature electric submersible pump can pass the maximum dogleg degree of the well section above the pump hanging of the faulty oil well. If the high-temperature electric submersible pump can pass the maximum dogleg degree of the well section above the pump hanging, the high-temperature electric submersible pump can perform well repair operations on the faulty oil well.

10. The SAGD high temperature electric submersible pump well selection method according to claim 1, It is characterized in that In the step S5, when the simulated pipe string is successfully tested in the faulty oil well selected after the secondary screening, the faulty oil well is the faulty oil well into which the high-temperature electric submersible pump is finally lowered.

Images