Integrated full-life-cycle rodless pump oil extraction method for unconventional oil reservoir oil well

Abstract

The invention relates to the technical field of oil field oil extraction, in particular to an unconventional oil reservoir oil well integrated full-life-cycle rodless pump oil extraction method. The method comprises the steps that a target well is determined, the target well is made to conduct self-spraying, basic data and a well track table of the target well are obtained, the pump setting depth is calculated, a continuous non-metal cable laying oil pipe is adopted in the whole oil extraction process, and when self-spraying of the target well reaches a limited range, first-displacement well fluid flow-back is conducted through an electric submersible centrifugal pump; when the first displacement reaches a limited range, second displacement well fluid flow-back and oil extraction are carried out through the electric submersible multiphase pump; when the second displacement reaches a limited range, third displacement oil extraction is carried out through the electric submersible screw pump; and when the third displacement reaches the limited range, fourth displacement oil extraction is conducted through the electric submersible diaphragm pump, and integrated full-life-cycle oil extraction of the target well is achieved. According to the method provided by the invention, a rodless lifting process with different displacement ranges and a continuous pipe cable technology are integrated, and full-life-cycle oil extraction is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of oil field production, and in particular to an integrated full-life cycle rodless pump production method for unconventional oil reservoirs and oil wells. Background Art

[0002] Unconventional oil reservoirs refer to oil reservoirs whose reservoir formation mechanism, reservoir characteristics and exploitation technology are different from those of conventional oil reservoirs. At present, in the middle and late stages of oil field development, the development of unconventional oil reservoirs has become a continuous force for sustained and stable production. Generally speaking, the medium of unconventional oil reservoirs is high in gas and sand, and the proportion of high-angle wells and horizontal wells is high. Rod pump systems are commonly used for the development of unconventional oil reservoirs. In actual production, rod pump systems have problems such as eccentric wear, sand and wax sticking, and low efficiency. Due to the rapid decline in production capacity of rod pump systems under the elastic development mode, they cannot be exploited throughout their life cycle. Therefore, in response to the above shortcomings, a rodless pump oil production method for unconventional oil reservoirs and oil wells throughout their life cycle is proposed. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides an integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells, so as to overcome the problems of low cable reuse rate, complicated procedures, wax deposition in oil pipes and the like in the prior art during the exploitation of unconventional oil reservoirs, and the problem that rodless lifting cannot produce oil in the full life cycle.

[0005] (II) Technical solution

[0006] In order to solve the above problems, the present invention provides an integrated full life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells, comprising:

[0007] Step S1: determine the oil well in the unconventional oil reservoir as the target well, make the target well flow, obtain the basic data and wellbore trajectory table of the target well, calculate the pump depth according to the basic data, and when the target well reaches the limited range of self-flowing, use the electric submersible centrifugal pump to return the well fluid at the first displacement, and use continuous non-metallic cabled oil pipe;

[0008] Step S2: when the target well reaches the limited range of the first displacement return well fluid in step S1, basic data of the target well portion is obtained, and the second displacement return well fluid and oil production are performed by an electric submersible oil mixed pump, and a continuous non-metallic cabled oil pipe is used;

[0009] Step S3: when the target well reaches the limited range of the second displacement flowback well fluid and oil production in step S2, the same type of basic data as in step S2 is obtained, and the third displacement oil production is performed by an electric submersible screw pump, and a continuous non-metallic cabled oil pipe is used;

[0010] Step S4: When the target well reaches the limited range of the third displacement oil production in step S3, the basic data of the target well is obtained again, and the fourth displacement oil production is carried out by an electric submersible diaphragm pump, and continuous non-metallic cabled oil pipe is used to realize integrated full life cycle oil production of the target well.

[0011] Preferably, during the entire process of oil production, the first displacement is greater than the second displacement, the second displacement is greater than the third displacement, and the third displacement is greater than the fourth displacement.

[0012] Preferably, in step S1, the basic data of the target well includes the self-flowing production B x , m 3 / d; gas production G x , m 3 / d; oil density γ o , g / cm 3 ; Total mineralization L i , mg / L; middle depth temperature, T z ,℃; Middle oil layer H z , m; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the well trajectory table includes: well depth D c , m, dogleg degree D g , (deg / 30m); the pump depth H P , m.

[0013] Preferably, in step S1, the target well has a limited range of 200m when flowing. 3 / d≤B x ≤500m 3 / d, according to B x Select the electric submersible centrifugal pump model and start the first displacement to return the well fluid.

[0014] Preferably, the calculation formula for the pumping depth is:

[0015]

[0016] Among them, H p is the pumping depth, m; H z is the middle part of the oil layer, m; γ o is the oil density, g / cm 3 ;P fs is the formation flow pressure, MPa; P λ is the pump suction pressure, MPa.

[0017] Preferably, the well depth D c and the pump depth H P Determine the pump depth, if Dc ≥6, then hang the upper pump to make H P The corresponding D c ≤6, ensure the unit passes smoothly; if D c ≤6, then the pump depth is determined to be H P ; According to the self-spraying output B x , Pump depth H p and the middle depth temperature T z Determine the power of the submersible motor according to the gas production G x Determine the gas separator according to the total mineralization L i Determine the coating material.

[0018] Preferably, in step S2, the basic data includes the self-spraying output B x , m 3 / d; oil density γ o , g / cm 3 ; Middle depth temperature, T z ,℃; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the limited range of the first displacement of the target well is 80m 3 / d≤B x ≤200m 3 / d, according to B x It is important to select the model of the electric submersible oil mixed flow pump and start the second displacement to return the well fluid and produce oil.

[0019] Preferably, in step S3, the second displacement of the target well is limited to a range of 10m 3 / d≤B x ≤80m 3 / d, according to B x It is important to select the model of electric submersible screw pump and start the third displacement oil production.

[0020] Preferably, in step S4, the type of the basic data is consistent with the basic type of step S1; the limited range of the target well during the third displacement oil production is 3m 3 / d≤B x ≤10m 3 / d, according to B x It is worth selecting the model of electric submersible diaphragm pump to start the fourth displacement oil production.

[0021] (III) Beneficial effects

[0022] The integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells provided by the present invention integrates the two technologies of rodless lifting technology with different displacement ranges and continuous pipe and cable, which not only solves the problems of low cable reuse rate, complicated procedures, and wax deposition in oil pipes, but also further solves the problem that rodless lifting cannot produce oil throughout the full life cycle during the exploitation of unconventional oil reservoirs. Efficient exploitation of unconventional oil reservoirs can be achieved according to the liquid volume and. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of an integrated full life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the cable laying of the conventional oil reservoir and oil well integrated full life cycle rodless pump oil production method according to an embodiment of the present invention.

[0025] Among them, 1-power cable; 2-heating cable; 3-signal cable. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Figure 1 Flow chart of the integrated full life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells according to an embodiment of the present invention. Figure 1 As shown, the present invention provides an integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells, comprising:

[0028] Step S1: determine the oil well in the unconventional oil reservoir as the target well, make the target well flow, obtain the basic data and wellbore trajectory table of the target well, calculate the pump depth according to the basic data, and when the target well reaches the limited range of self-flowing, use the electric submersible centrifugal pump to return the well fluid at the first displacement, and use continuous non-metallic cabled oil pipe;

[0029] Step S2: when the target well reaches the limited range of the first displacement return well fluid in step S1, basic data of the target well portion is obtained, and the second displacement return well fluid and oil production are performed by an electric submersible oil mixed pump, and a continuous non-metallic cabled oil pipe is used;

[0030] Step S3: when the target well reaches the limited range of the second displacement flowback well fluid and oil production in step S2, the same type of basic data as in step S2 is obtained, and the third displacement oil production is performed by an electric submersible screw pump, and a continuous non-metallic cabled oil pipe is used;

[0031] Step S4: When the target well reaches the limited range of the third displacement oil production in step S3, the basic data of the target well is obtained again, and the fourth displacement oil production is carried out by an electric submersible diaphragm pump, and continuous non-metallic cabled oil pipe is used to realize integrated full life cycle oil production of the target well.

[0032] It should be noted that in this oil production method, the entire oil production process of the target well uses continuous non-metallic cabled oil pipe, such as Figure 2 As shown, the continuous non-metallic cable-laid oil pipe has power cable 1, heating cable 2 and signal cable 3 placed inside, saving operating materials and costs. At the same time, it has its own wax cleaning and anti-wax heating cable, saving wax cleaning and anti-wax costs. In addition, during the entire oil production process, the first to fourth displacements show a decreasing trend, the first displacement is greater than the second displacement, the second displacement is greater than the third displacement, and the third displacement is greater than the fourth displacement, thereby realizing the integration of rodless lifting technology in different displacement ranges and continuous pipe and cable technology.

[0033] In practical applications, in step S1, the basic data of the target well includes the self-flowing production B x , m 3 / d; gas production G x , m 3 / d; oil density γ o , g / cm 3 ; Total mineralization L i , mg / L; middle depth temperature, T z ,℃; Middle oil layer H z , m; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the well trajectory table includes: well depth D c , m, dogleg degree D g , (deg / 30m); the pump depth H P , m.

[0034] The calculation formula for the pump depth is:

[0035]

[0036] In the formula, H p is the pumping depth, m; H z is the middle part of the oil layer, m; γ o is the oil density, g / cm 3 ;P fs is the formation flow pressure, MPa; P λ is the pump suction pressure, MPa.

[0037] In addition, the well depth D c and pump depth HP Determine the pump depth, if D c ≥6, then hang the upper pump so that H P The corresponding D c ≤6, ensure the unit passes smoothly; if D c ≤6, then the pump depth is determined to be H P ; According to the self-spraying output B x , Pump depth H p and the middle depth temperature T z Determine the power of the submersible motor according to the gas production G x Determine the gas separator according to the total mineralization L i Determine the coating material.

[0038] In this oil production method, in step S1, the target well has a limited range of 200m when it is flowing. 3 / d≤B x ≤500m 3 / d, according to B x Select the electric submersible centrifugal pump model and start the first displacement to return the well fluid.

[0039] In the present oil production method, in step S2, the basic data includes the self-flowing production B x , m 3 / d; oil density γ o , g / cm 3 ; Middle depth temperature, T z ,℃; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the first displacement of the target well is limited to 80m 3 / d≤B x ≤200m 3 / d, according to B x It is important to select the model of the electric submersible oil mixed pump and start the second displacement to return the well fluid and produce oil.

[0040] In practical applications, since part of the basic data in step S3 is compatible with part of the basic data in step S2, in step S3, part of the basic data includes the self-spraying output B x , m 3 / d; oil density γ o , g / cm 3 ; Middle depth temperature, T z ,℃; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the second displacement of the target well is limited to 10m 3 / d≤B x ≤80m3 / d, according to B x It is important to select the model of electric submersible screw pump and start the third displacement oil production.

[0041] In the present oil production method, in step S4, the type of basic data is consistent with the type of basic data in step S1. The basic data in step S4 includes the self-flowing production B x , m 3 / d; gas production G x , m 3 / d; oil density γ o , g / cm 3 ; Total mineralization L i , mg / L; middle depth temperature, T z ,℃; Middle oil layer H z , m; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the limited range of the target well during the third displacement oil production is 3m 3 / d≤B x ≤10m 3 / d, according to B x It is worth selecting the model of electric submersible diaphragm pump to start the fourth displacement oil production.

[0042] In practical applications, during the whole process of oil production, the power, type, and material of other tools at each stage can be selected according to the different data types obtained in each step. In step S1 and step S4, according to the self-flowing production B x , Pump depth H p and the middle depth temperature T z Determine the power of the submersible motor according to the gas production G x Determine the gas separator according to the total mineralization L i Determine the coating material; in steps S2 and S3, according to the self-spraying output B x , Pump depth H p and the middle depth temperature T z Determine the horsepower of the submersible motor.

[0043] In addition, in practical applications, the electric submersible mixed pump is not affected by gas, sand, and scale, and the electric submersible screw pump is not affected by gas, sand, and scale. The present invention provides an integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells, establishes a full-life cycle rodless lifting mode for unconventional oil reservoirs and oil wells, integrates rodless lifting processes with different displacement ranges and continuous pipe and cable technologies, solves the problems of low cable reuse rate, complex procedures, and wax deposition in oil pipes, and further realizes the full-life cycle successive exploitation of unconventional oil reservoirs and oil wells to meet full displacement coverage. The implementation process of this integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells is described in detail below:

[0044] Step 1: Identify the oil well in the unconventional oil reservoir as the target well, make the target well flow, obtain the basic data and wellbore trajectory table of the target well, calculate the pump depth based on the basic data and wellbore trajectory table, and when the target well reaches the limited range of self-flowing, use the electric submersible centrifugal pump to return the well fluid for the first displacement, and use continuous non-metallic cabled oil pipe.

[0045] In this embodiment, taking the target shale oil well X1 as an example, the self-flowing production B is obtained. x , 238.4m 3 / d; gas production G x , 1009m 3 / d; oil density γ o , 0.7902g / cm 3 ; Total mineralization L i , 15524.0mg / L; middle depth temperature Tz, 110℃; middle oil layer H z , 2560m; formation flow pressure P fs , 23MPa; pump suction pressure P λ , 18.5MPa; Wellbore trajectory table, Table 1 is the wellbore trajectory table, as shown in Table 1, including: Well depth D c , m, dogleg degree D g , (deg / 30m).

[0046] Table 1 Wellbore trajectory table

[0047] Depth(m) Well deviation (deg) Vertical depth(m) Dogleg degree (deg / 30m) 256.00 1.53 255.97 0.18 385.69 2.31 385.58 2.34 559.90 15.76 557.66 3.16 589.05 18.08 585.55 2.40 2208.58 2.23 2130.50 2.03 2237.93 0.21 2159.84 2.10 2316.24 1.03 2238.15 3.35 2325.91 2.55 2247.81 4.89 2335.57 4.11 2257.46 5.27 2345.23 5.89 2267.08 5.68 2354.89 7.60 2276.67 5.38 2374.24 10.81 2295.77 5.72 2383.91 12.86 2305.24 6.59 2393.57 14.88 2314.62 6.30

[0048] Step 101: The oil well in the unconventional oil reservoir has reached a flow rate of 200m 3 / d≤B x ≤500m 3 / d, the first displacement is carried out by the electric submersible centrifugal pump to return the well fluid;

[0049] Step 102, based on the daily volume of 238.4m 3 / d, select the production range to cover 238.4m 3 / d Corresponding electric submersible centrifugal pump, 80m 3 / d-500m 3 / d, design head 1800m;

[0050] Step 103, calculate H according to the pump depth formula P is 1990m, corresponding to D c Less than 3;

[0051] Step 104: If D c ≤6, the pump can be lowered to D c=5, which is 2325.91, and then lift up 80 meters to ensure that the suction port is in the right position, and determine that the pump depth is 2245m;

[0052] Step 105, based on the daily volume of 238.4m 3 / d, pump depth 2245m, middle depth temperature 110℃, select 100KW, 105mm outer diameter submersible motor;

[0053] Step 106, gas production 1009m 3 / d, select vortex gas separator, the separation efficiency reaches 90%;

[0054] Step 107, total mineralization L i , 15524.0mg / L, select Teflon coating treatment.

[0055] Step 2: When the target well reaches the limited range of the first displacement return well fluid, obtain the basic data of the target well part, carry out the second displacement return well fluid and oil production through the electric submersible oil mixed pump, and use continuous non-metallic cabled oil pipe.

[0056] In this embodiment, when the target well reaches the limited range of the first displacement flowback well fluid, the self-flowing production B is obtained. x , 172.8m 3 / d; oil density γ o , 0.774g / cm3; middle depth temperature T z , 111℃; formation flow pressure P fs , 21MPa; pump suction pressure P λ , 15Mpa.

[0057] Step 201, when the first displacement reaches 80m 3 / d≤B x ≤200m 3 / d, the electric submersible mixed pump is used to return the well fluid and produce oil at the second displacement, and the second displacement is smaller than the first displacement;

[0058] Step 202, based on the daily volume of 172.8m 3 / d, select the production range to cover 172.8m 3 / d Corresponding electric submersible oil mixed pump, 100m 3 / d-300m 3 / d, design head 2000m;

[0059] Step 203, calculate H according to the pump depth formula P is 1784m, corresponding to D c Less than 3;

[0060] Step 204, if Dc ≤6, the pump can be lowered to D c =5, which is 2325.91, and then lift up 80 meters to ensure that the suction port is in the right position, and determine that the pump depth is 2245m;

[0061] Step 205, according to 172.8m 3 / d, 2245m, 111℃, select 150kW, 4500rpm high-speed submersible motor.

[0062] Step 3: When the target well reaches the limited range of the second displacement flowback well fluid and oil production, obtain the same type of basic data as in step 2, perform the third displacement oil production through an electric submersible screw pump, and use continuous non-metallic cabled oil pipe.

[0063] In this embodiment, when the target well reaches the limited range of the second displacement return well fluid and oil production, the self-flowing production B is obtained. x , 40.2m 3 / d; oil density γ o , 0.7757g / cm 3 ; Middle depth temperature T z , 112℃; formation flow pressure P fs , 19MPa; pump suction pressure P λ , 14MPa.

[0064] Step 301, the second displacement reaches 10m 3 / d≤B x ≤80m 3 / d range, the third displacement is carried out through the electric submersible screw pump, and the third displacement is smaller than the second displacement;

[0065] Step 302, based on the daily volume of 40.2m 3 / d, select the production range to cover 40.2m 3 / d Corresponding electric submersible oil mixed pump, 30m 3 / d-100m 3 / d, design head 1800m;

[0066] Step 303, calculate H according to the pump depth formula P is 1915m, corresponding to D c Less than 3;

[0067] Step 304, if D c ≤6, the pump can be lowered to D c =5, which is 2325.91, and then lift up 80 meters to ensure that the suction port is in the right position, and determine that the pump depth is 2245m;

[0068] Step 305, according to 40.2m3 / d, 2245m, 111℃, choose 50kW submersible motor.

[0069] Step 4: When the target well reaches the limited range of the third displacement oil production, the basic data of the target well is obtained again, and the fourth displacement oil production is carried out through the electric submersible diaphragm pump, and continuous non-metallic cabled oil pipe is used to realize the integrated full life cycle oil production of the target well.

[0070] In this embodiment, when the target well reaches the limited range of the third displacement oil production, the self-flowing production B is obtained. x , 6.3m 3 / d; gas production G x , 600m 3 / d; oil density γ o , 0.7714g / cm 3 ; Total mineralization L i , 14000mg / L; middle depth temperature T z , 113℃; formation flow pressure P fs , 15MPa; pump suction pressure P λ , 10MPa.

[0071] Step 401, the third displacement reaches 3m 3 / d≤B x ≤10m 3 / d range, the fourth displacement is carried out through the electric submersible diaphragm pump, and the fourth displacement is less than the third displacement;

[0072] Step 402, based on the daily volume of 6.3m 3 / d, select the production range to cover 6.3m 3 / d Corresponding electric submersible diaphragm pump, 3m 3 / d-10m 3 / d, design head 1600m;

[0073] Step 403, calculate H according to the pump depth formula P The depth of the reservoir is 1911m, the medium depth of the reservoir is 2560m, and the flow pressure can lift 1900m when it is lowered to the 2560m horizontal section. The pump head is 1600m, which meets the well fluid lifting requirements. The HP is determined to be 2560m;

[0074] Step 404, according to B x , H P , T z , select the corresponding power submersible motor;

[0075] Step 405, based on the daily volume of 6.3m 3 / d, pump depth 2560m, middle depth temperature 110℃, select 3KW submersible motor;

[0076] Step 406, based on the gas content of 600m 3 / d, select the deflector gas separator;

[0077] Step 407, according to the total mineralization L i , 14000mg / L, select Teflon coating treatment.

[0078] The integrated full-life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells provided by the present invention integrates the two technologies of rodless lifting technology with different displacement ranges and continuous pipe and cable, which not only solves the problems of low cable reuse rate, complicated procedures, and wax deposition in oil pipes, but also further solves the problem that rodless lifting cannot produce oil throughout the full life cycle during the exploitation of unconventional oil reservoirs. Efficient exploitation of unconventional oil reservoirs can be achieved according to the liquid volume and.

[0079] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. An integrated full life cycle rodless pump oil production method for unconventional oil reservoirs and oil wells, characterized in that: include: Step S1: determine the oil well in the unconventional oil reservoir as the target well, make the target well flow, obtain the basic data and wellbore trajectory table of the target well, calculate the pump depth according to the basic data, and when the target well reaches the limited range of self-flowing, use the electric submersible centrifugal pump to return the well fluid at the first displacement, and use continuous non-metallic cabled oil pipe; Step S2: when the target well reaches the limited range of the first displacement return well fluid in step S1, basic data of the target well portion is obtained, and the second displacement return well fluid and oil production are performed by an electric submersible oil mixed pump, and a continuous non-metallic cabled oil pipe is used; Step S3: when the target well reaches the limited range of the second displacement flowback well fluid and oil production in step S2, the same type of basic data as in step S2 is obtained, and the third displacement oil production is performed by an electric submersible screw pump, and a continuous non-metallic cabled oil pipe is used; Step S4: When the target well reaches the limited range of the third displacement oil production in step S3, the basic data of the target well is obtained again, and the fourth displacement oil production is carried out by an electric submersible diaphragm pump, and continuous non-metallic cabled oil pipe is used to realize integrated full life cycle oil production of the target well.

2. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 1, characterized in that: During the entire process of oil production, the first displacement is greater than the second displacement, the second displacement is greater than the third displacement, and the third displacement is greater than the fourth displacement.

3. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 1, characterized in that: In step S1, the basic data of the target well includes the self-flowing production B x , m 3 / d; gas production G x , m 3 / d; oil density γ o , g / cm 3 ; Total mineralization L i , mg / L; middle depth temperature, T z ,℃; Middle oil layer H z , m; formation flow pressure P fs , MPa; Pump suction pressure P λ , MPa; the well trajectory table includes: well depth D c , m, dogleg degree D g , (deg / 30m); the pump depth H P , m.

4. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 3, characterized in that: In step S1, the target well has a limited range of 200m when it is flowing. 3 / d≤B x ≤500m 3 / d, according to B x Select the electric submersible centrifugal pump model and start the first displacement to return the well fluid.

5. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 3, characterized in that: The calculation formula of the pump depth is as follows: Among them, H p is the pumping depth, m; H z is the middle part of the oil layer, m; γ o is the oil density, g / cm 3 ;P fs is the formation flow pressure, MPa; P λ is the pump suction pressure, MPa.

6. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 3, characterized in that: The well depth D c and the pump depth H P Determine the pump depth, if D c ≥6, then hang the upper pump to make H P The corresponding D c ≤6, ensure the unit passes smoothly; if D c ≤6, then the pump depth is determined to be H P ; According to the self-spraying output B x , Pump depth H p and the middle depth temperature T z Determine the power of the submersible motor according to the gas production G x Determine the gas separator according to the total mineralization L i Determine the coating material.

7. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 1, characterized in that: In step S2, the basic data includes the self-spraying output B x , m 3 / d; oil density γ o , g / cm 3 ; Middle depth temperature, T z ,℃; formation flow pressure P fs , MPa; pump suction pressure P λ , MPa; the limited range of the target well during the first return of well fluid is 80m 3 / d≤B x ≤200m 3 / d, according to B x It is important to select the model of the electric submersible oil mixed flow pump and start the second displacement to return the well fluid and produce oil.

8. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 1, characterized in that: In step S3, the second return flow of well fluid and the first oil production of the target well are limited to 10m 3 / d≤B x ≤80m 3 / d, according to B x It is important to select the model of electric submersible screw pump and start the third displacement oil production.

9. The unconventional oil reservoir oil well integrated full life cycle rodless pump oil production method according to claim 1, characterized in that: In step S4, the type of the basic data and the basic data of step S1 are The target well's third displacement oil production limit range is 3m 3 / d≤B x ≤10m 3 / d, According to B x It is worth selecting the model of electric submersible diaphragm pump to start the fourth displacement oil production.

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