Staged fracturing tracing productivity analyzing and testing method

Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a staged fracturing tracing productivity analyzing and testing method which comprises the following steps: S1, calculating the dosage and injection speed of a tracer agent according to staged fracturing data; s2, preparing a tracer solution with a specified concentration, and adding the tracer solution into the feeding device; s3, the tracer agent is added into different layer sections in the fracturing process through the putting device; s4, in the fracturing fluid flowback period, continuous sampling is conducted from a sampling opening of a flowback fluid pipeline; s5, after the collected sample is treated, the sample is detected, and a tracer agent concentration curve is obtained; s6, carrying out comprehensive analysis processing, comprehensive interpretation and evaluation on the obtained data and curve, and giving a related analysis result; the tracer agent stirring device is simple in structure, tracer agent liquid in the box body can be stirred in the circumferential direction and the vertical direction at the same time, mutual contact of the tracer agent liquid in the box body is promoted, it is guaranteed that the tracer agent liquid is evenly mixed, and the conditions of layering and precipitation are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum exploitation, in particular to a staged fracturing tracer capacity analysis and testing method. Background Art

[0002] Tracer detection technology refers to injecting tracers from injection wells, then sampling in surrounding production wells according to certain sampling regulations, monitoring their production, analyzing the samples, and obtaining tracer production curves, which are then fitted to reflect the connectivity of oil and water wells during water injection development, and to grasp the advancement direction, displacement speed, swept area, reservoir heterogeneity and residual oil saturation distribution of injected water, thereby guiding the design of oil well exploitation and the adjustment of oil field development in the later stage.

[0003] When using the existing tracer injection device for staged fracturing wells, the tracer is mostly pre-mixed and stirred, and is simply pumped into the staged fracturing well by a pump during injection. The tracer in the container cannot be stirred and mixed during the injection process. When the tracer injection amount is large and the injection time is relatively long, the tracer in the container is prone to stratification and precipitation, resulting in the initial concentration of the injected tracer not meeting the standard or the tracer injection being uneven, which reduces the use effect of the injected tracer and affects the accuracy and precision of subsequent detection, as well as the final analysis results. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the tracer liquid in the box is stirred simultaneously in the circumferential direction and the vertical direction to promote the mutual contact of the tracer liquid in the box and ensure its uniform mixing without stratification and precipitation. The present invention proposes a staged fracturing tracer capacity analysis test method.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a staged fracturing tracer capacity analysis and testing method according to the present invention comprises the following steps: S1: Calculate the tracer dosage and tracer injection rate according to the staged fracturing data, such as the number of stages, the liquid volume in each stage, etc.; the tracer dosage calculation formula is: A=1000*μ*MDL*Vp, where: A—tracer dosage kg, μ—security factor 500, MDL—instrument minimum detection limit 10-9 g / mL, Vp—liquid volume in each stage m3; the tracer injection rate calculation formula is: Q=A / t, where: Q—injection pump flow mL / min, A—tracer solution volume mL, t—engineering liquid injection time min; S2: preparing a tracer solution of a specified concentration and adding the tracer solution to the delivery device; S3: adding tracers to different layers during the fracturing process through a delivery device; wherein, the tracers are delivered through a high-precision constant flow pump, and the tracer injection time is from the start of sand addition to the end of sand addition, and the oil phase tracer and the water phase tracer are added at the same time; during the tracer addition process, the tracer injection speed is adjusted in proportion to the fracturing fluid injection speed to ensure that the tracer addition amount is uniform; S4: During the fracturing fluid flowback period, continuous sampling is carried out from the sampling port of the flowback fluid pipeline; the sampling frequency is determined according to the flowback fluid volume, and the principle is to sample once every 30-50m3 of flowback fluid. At the same time, the termination or extension of the sampling time is determined according to the test results. The initial sampling time is expected to be 2-3 months; S5: After processing the collected samples, the samples are detected by inductively coupled plasma mass spectrometry to obtain a tracer concentration curve; during the sample processing, the oil-water samples are filtered, and the collected filtrate must be clear and transparent. At the same time, for samples with low water content or in the state of oil-in-water, dehydration treatment is first performed; S6: Comprehensively analyze and process the obtained data and curves, comprehensively interpret and evaluate them, and give relevant analysis results; The delivery device comprises a box body, an inlet pipe and an injection pipe are installed on the box body, a high-precision constant flow pump is installed on the injection pipe, a rotating shaft is installed in the box body, the rotating shaft is driven by a motor, a sleeve shaft is sleeved on the rotating shaft, the rotating shaft and the sleeve shaft are connected by a spline, and a dial plate is installed on the sleeve shaft; A mounting plate is installed at the upper end of the sleeve shaft, a spring is installed on the mounting plate, the other end of the spring is connected to the top surface of the box body, a mounting seat is installed on the bottom surface of the box body, a protrusion is arranged on the mounting seat, a stop block is installed at the lower end of the sleeve shaft, and the stop block and the protrusion cooperate with each other.

[0006] Preferably, the paddle plate consists of two parts, a horizontal portion and an inclined portion. The cross section of the paddle plate is in a "Z" shape. The horizontal portion is parallel to a horizontal plane, and an angle exists between the inclined portion and the horizontal portion.

[0007] Preferably, the inclined portion is provided with evenly distributed mesh holes.

[0008] Preferably, the end surface of one end of the protrusion is rounded, and the end surface of the other end of the protrusion is perpendicular to the upper surface of the mounting seat.

[0009] Preferably, a guide surface is provided at the edge of the bottom surface inside the box body, the bottom surface inside the box body is in an arc shape, the injection pipe is connected to the middle position of the bottom surface inside the box body, the mounting seat is located directly above the opening of the injection pipe in the box body, and the inlet pipe is installed on the top cover of the box body.

[0010] Preferably, a connecting shaft is installed at the lower end of the rotating shaft, and a blade is installed on the connecting shaft. The blade is located between the mounting seat and the opening of the injection pipe on the box body.

[0011] Preferably, the blades include an upper blade and a lower blade, the upper blade is fixedly mounted on the connecting shaft, and the lower blade is rotatably mounted on the connecting shaft. The upper blade is located above the opening of the injection pipe on the box body, and the lower blade is located inside the opening of the injection pipe on the box body, and the upper blade and the lower blade have opposite rotation directions.

[0012] Preferably, an isolation coating is provided inside the delivery device and on the surface of each component, and the isolation coating has good hydrophobic and oleophobic properties.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention discloses a staged fracturing tracer capacity analysis test method, which stirs the tracer liquid in the box in the circumferential direction and the vertical direction at the same time by setting a rotating shaft, a sleeve shaft, a mounting plate, a spring, a mounting seat, a protrusion, a block and a paddle, thereby promoting the mutual movement between the tracer liquids, thereby ensuring that the tracer liquid always maintains a uniformly mixed state to avoid affecting the subsequent detection and analysis results.

[0014] 2. The present invention discloses a staged fracturing tracer capacity analysis test method, which further stirs and guides the tracer liquid by setting a guide surface, a dial plate, a horizontal portion, an inclined portion, a connecting shaft, an upper blade and a lower blade, thereby reducing dead corners that may exist during the movement of the tracer liquid, ensuring that the tracer liquid is maintained in a uniformly mixed state, thereby avoiding affecting subsequent detection and analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 is a method step diagram of the analysis and testing method of the present invention; Figure 2 It is a front view of the delivery device of the present invention; Figure 3 It is a schematic diagram of the structure of the delivery device in the present invention; Figure 4 It is a schematic diagram of the structure of the paddle in the delivery device of the present invention; Figure 5 yes Figure 3 A partial enlarged view of the middle part; In the figure: box body 1, inlet pipe 11, injection pipe 12, high-precision constant flow pump 13, motor 14, guide surface 15, rotating shaft 2, sleeve shaft 3, mounting plate 31, spring 32, mounting seat 33, protrusion 331, block 332, dial plate 4, horizontal part 41, inclined part 42, connecting shaft 5, upper blade 51, lower blade 52. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figures 1 to 5 As shown, the present invention provides a staged fracturing tracer capacity analysis and testing method, the method comprising the following steps: S1: Calculate the tracer dosage and tracer injection rate according to the staged fracturing data, such as the number of stages, the liquid volume in each stage, etc.; the tracer dosage calculation formula is: A=1000*μ*MDL*Vp, where: A—tracer dosage kg, μ—security factor 500, MDL—instrument minimum detection limit 10-9 g / mL, Vp—liquid volume in each stage m3; the tracer injection rate calculation formula is: Q=A / t, where: Q—injection pump flow mL / min, A—tracer solution volume mL, t—engineering liquid injection time min; S2: preparing a tracer solution of a specified concentration and adding the tracer solution to the delivery device; S3: adding the tracer to different layers in the fracturing process through the delivery device; wherein the tracer is delivered through the high-precision constant flow pump 13, and the tracer injection time is from the start of sand addition to the end of sand addition, and the oil phase tracer and the water phase tracer are added at the same time; during the tracer addition process, the tracer injection speed is proportionally adjusted with the fracturing fluid injection speed to ensure that the tracer addition amount is uniform; S4: During the fracturing fluid flowback period, continuous sampling is carried out from the sampling port of the flowback fluid pipeline; the sampling frequency is determined according to the flowback fluid volume, and the principle is to sample once every 30-50m3 of flowback fluid. At the same time, the termination or extension of the sampling time is determined according to the test results. The initial sampling time is expected to be 2-3 months; S5: After processing the collected samples, the samples are detected by inductively coupled plasma mass spectrometry to obtain a tracer concentration curve; during the sample processing, the oil-water samples are filtered, and the collected filtrate must be clear and transparent. At the same time, for samples with low water content or in the state of oil-in-water, dehydration treatment is first performed; S6: Comprehensively analyze and process the obtained data and curves, comprehensively interpret and evaluate them, and give relevant analysis results; The delivery device includes a box body 1, on which an inlet pipe 11 and an injection pipe 12 are installed, on which a high-precision constant flow pump 13 is installed, a rotating shaft 2 is installed in the box body 1, and the rotating shaft 2 is driven by a motor 14, on which a sleeve shaft 3 is sleeved, the rotating shaft 2 and the sleeve shaft 3 are connected by a spline, and on which a dial plate 4 is installed; A mounting plate 31 is mounted on the upper end of the sleeve shaft 3, a spring 32 is mounted on the mounting plate 31, the other end of the spring 32 is connected to the top surface of the box body 1, a mounting seat 33 is mounted on the bottom surface of the box body 1, a protrusion 331 is arranged on the mounting seat 33, a stopper 332 is mounted on the lower end of the sleeve shaft 3, and the stopper 332 and the protrusion 331 cooperate with each other; During the analysis and testing process, the staff puts the prepared tracer solution in a container, and then adds the tracer solution from the inlet pipe 11 to the delivery device through a liquid pump. Then, the motor 14 is started through the controller installed on the delivery device, thereby driving the rotating shaft 2 and the sleeve shaft 3 to rotate, so that the paddle 4 stirs the tracer solution added to the box 1 to keep the tracer solution mixed evenly, and avoids stratification and precipitation of the tracer solution during long-term operation, resulting in uneven tracer injection, affecting subsequent detection and analysis results. At the same time, after the tracer solution is added to the delivery device, during the fracturing process, the high-precision constant flow pump 13 accurately extracts the tracer solution stirred and kept evenly mixed in the box 1 and injects it into the staged fracturing well to complete the tracer injection process. Afterwards, when the fracturing fluid is returned, the return fluid is sampled and tested to obtain a tracer concentration curve, and the relevant data and the concentration curve are comprehensively interpreted and evaluated to provide analysis results; At the same time, since the rotating shaft 2 and the sleeve shaft 3 are connected by a spline, under the action of the spring 32, the lower end of the sleeve shaft 3 is tightly attached to the mounting seat 33. Therefore, when the motor 14 drives the rotating shaft 2 and the sleeve shaft 3 to rotate, the stopper 332 on the sleeve shaft 3 will periodically contact and separate from the protrusion 331 on the mounting shaft, so that the sleeve shaft 3 moves back and forth on the rotating shaft 2. During this process, the paddle 4 on the sleeve shaft 3 will also move up and down, thereby further stirring the tracer in the box 1, reducing the four corners that may exist when the paddle 4 rotates in a circle and stirring the tracer in the box 1, thereby improving the ability to keep the tracer mixed evenly, avoiding the initial concentration of the tracer not meeting the standard or uneven delivery, which affects the subsequent detection and analysis results.

[0019] As an embodiment of the present invention, the dial plate 4 is composed of a horizontal portion 41 and an inclined portion 42. The cross section of the dial plate 4 is in a "Z" shape. The horizontal portion 41 is parallel to the horizontal plane, and there is an angle between the inclined portion 42 and the horizontal portion 41. Since the paddle 4 includes a horizontal portion 41 and an inclined portion 42, when the paddle 4 rotates in a circle, the inclined portion 42 on the paddle 4 stirs the tracer liquid in the box 1 to promote the movement of the tracer liquid in the box 1. At this time, the tracer solution in the box 1 may have some dead angle areas when being stirred. The tracer solution in this area may be unevenly mixed, precipitated, and layered, which may affect the accuracy and correctness of subsequent detection and analysis results. At the same time, when the paddle 4 is affected by the protrusion 331 and the stopper 332 and reciprocates up and down, The horizontal portion 41 on the paddle 4 further stirs the tracer liquid in the box 1, so that the tracer liquid in the box 1 also moves up and down in the presence of a circular motion, so that the tracer liquid in the box 1 is fully stirred through the circular motion and the up and down motion, and the dead angle existing in the movement of the tracer liquid in the box 1 is avoided or reduced as much as possible, so as to ensure that the tracer solution added to the dosing device is still in a moving state during dosing, and ensure that the initial concentration of the dosing tracer meets the standard and the dosing is uniform, so as to avoid affecting the subsequent detection and analysis results; At the same time, by providing the horizontal portion 41 and the inclined portion 42 , the paddle 4 can fully paddle the tracer solution in the circumferential direction and the vertical direction, and ensure that the stirring effect of the two parts is relatively good, thereby eliminating the need to provide paddles 4 of various shapes and positions.

[0020] As an embodiment of the present invention, the inclined portion 42 is provided with evenly distributed mesh holes; The provided mesh holes allow the tracer solutions to be mixed as much as possible during the rotation of the paddle 4 and the up and down movement of the paddle 4 to maintain a uniformly mixed state. At the same time, the provided mesh holes reduce the force exerted by the paddle 4 on the tracer solution during the rotation process, thereby preventing the formation of a vortex in the tracer solution in the box 1, which causes the tracer solution to splash randomly inside the box 1.

[0021] As an embodiment of the present invention, the end surface of one end of the protrusion 331 is rounded, and the end surface of the other end of the protrusion 331 is perpendicular to the upper surface of the mounting seat 33; Due to the cooperation between the protrusion 331 and the stopper 332, when the stopper 332 moves from one end of the rounded corner of the protrusion 331 and passes over the other end, the stopper 332 will first gradually rise, then move along the upper surface of the protrusion 331, and finally the stopper 332 will suddenly and quickly fall from the upper surface of the protrusion 331 and contact the surface of the mounting seat 33, so that the sleeve plate can drive the dial plate 4 to rise relatively slowly and move downward relatively quickly, thereby reducing the possibility of the dial plate 4 driving the tracer solution to splash upward in the box 1, and causing the dial plate 4 to produce a downward impact on the tracer solution, so as to generate turbulence in the tracer solution in the box 1 through the impact, or increase the number of turbulence, thereby reducing the dead angle of the tracer solution movement in the box 1, and increasing the possibility of the tracer solution moving in the box 1 and maintaining uniform mixing, thereby ensuring that the subsequent detection and analysis results are accurate and correct.

[0022] As an embodiment of the present invention, a guide surface 15 is provided at the edge of the bottom surface of the box body 1, the bottom surface of the box body 1 is in an arc shape, the injection pipe 12 is connected to the middle position of the bottom surface of the box body 1, the mounting seat 33 is located directly above the opening of the injection pipe 12 in the box body 1, and the inlet pipe 11 is installed on the top cover of the box body 1; A guide surface 15 is provided at the edge of the bottom surface of the box body 1, which is conducive to the tracer solution in the box body 1 being extracted from the injection pipe 12 by the high-precision constant flow pump 13 and injected into the staged fracturing well. At the same time, by providing the guide surface 15, the bottom surface of the box body 1 is in an arc shape. The arc shape is used to guide the flow of the tracer liquid when the paddle 4 stirs the tracer liquid, so that the tracer liquid can flow smoothly, reducing the situation where the liquid flow speed in the corners and angles in the box body 1 slows down or even dead corners appear, and further ensuring that the tracer solution maintains a uniformly mixed state until it is extracted and injected into the staged fracturing well.

[0023] As an embodiment of the present invention, a connecting shaft 5 is installed at the lower end of the rotating shaft 2, and a blade is installed on the connecting shaft 5, and the blade is located between the mounting seat 33 and the opening of the injection pipe 12 on the box body 1; When the motor 14 drives the rotating shaft 2 to rotate, the connecting shaft 5 and the blades on the connecting shaft 5 will also rotate synchronously, so that the tracer solution between the mounting seat 33 and the opening of the injection tube 12 on the housing 1 is stirred, avoiding a dead angle below the mounting seat 33. At the same time, the connecting shaft 5 and the blades rotate at the opening of the injection tube 12 on the housing 1, and the tracer solution is also stirred for the last time, so that the tracer solution is still stirred at the last moment before being discharged from the injection tube 12, so that it remains in a uniformly mixed state. At the same time, the particles that may have settled to the bottom or the lumps that have gathered to the bottom during the stirring process can be stirred and dispersed, so as to keep the tracer solution in a uniformly mixed state as much as possible, thereby improving the accuracy of subsequent detection and analysis.

[0024] As an embodiment of the present invention, the blades include an upper blade 51 and a lower blade 52, wherein the upper blade 51 is fixedly mounted on the connecting shaft 5, and the lower blade 52 is rotatably mounted on the connecting shaft 5. The upper blade 51 is located above the opening of the injection pipe 12 on the box body 1, and the lower blade 52 is located inside the opening of the injection pipe 12 on the box body 1, and the upper blade 51 rotates in opposite directions to the lower blade 52; When the tracer solution is not extracted and discharged by the high-precision constant-current pump 13, since the lower blade 52 is located in the opening of the injection tube 12 on the housing 1, the lower blade 52 is hardly affected by the tracer liquid driven by the upper blade 51. Therefore, at this time, only the upper blade 51 rotates alone to stir and push the tracer solution below the mounting seat 33, thereby promoting the tracer solution to be mixed evenly. At the same time, when the tracer solution is extracted and discharged by the high-precision constant-current pump 13, liquid will flow in the opening of the injection tube 12 on the housing 1. At this time, the lower blade 52 will rotate under the influence of the flowing liquid. Combined with the influence of the rotation of the upper blade 51 on the liquid flow, the tracer solution between the upper blade 51 and the lower blade 52 and the nearby area will be fully stirred and mixed, thereby ensuring that the tracer solution is mixed evenly as much as possible, and ensuring the accuracy of subsequent detection and analysis.

[0025] As an embodiment of the present invention, an isolation coating is provided inside the delivery device and on the surface of each component, and the isolation coating has good hydrophobic and oleophobic properties; By setting up the isolation coating, the tracer solution residue in the delivery device is reduced, and the cleaning process of the subsequent delivery device when it is used again is facilitated, thereby avoiding the residual tracer from interfering with the subsequent detection and analysis process and affecting its accuracy. At the same time, by reducing the adhesion and residue of the tracer through the isolation coating, the waste of the tracer can also be reduced.

[0026] The specific workflow is as follows: During the analysis and testing process, the staff puts the prepared tracer solution in a container, and then adds the tracer solution from the inlet pipe 11 to the delivery device through a liquid pump. Then, the motor 14 is started through the controller installed on the delivery device, thereby driving the rotating shaft 2 and the sleeve shaft 3 to rotate, so that the paddle 4 stirs the tracer solution added to the box 1. At the same time, after the tracer solution is added to the delivery device, during the fracturing process, the high-precision constant flow pump 13 accurately extracts the tracer solution stirred and kept uniformly mixed in the box 1 and injects it into the staged fracturing well to complete the tracer injection process. Afterwards, when the fracturing fluid is returned, the return fluid is sampled and tested to obtain a tracer concentration curve, and the relevant data and the concentration curve are comprehensively interpreted and evaluated to provide an analysis result; At the same time, since the rotating shaft 2 and the sleeve shaft 3 are connected by a spline, the lower end of the sleeve shaft 3 is tightly attached to the mounting seat 33 under the action of the spring 32. Therefore, when the motor 14 drives the rotating shaft 2 and the sleeve shaft 3 to rotate, the stopper 332 on the sleeve shaft 3 will periodically contact and separate from the protrusion 331 on the mounting shaft, so that the sleeve shaft 3 moves back and forth on the rotating shaft 2. During this process, the paddle 4 on the sleeve shaft 3 will also move up and down, thereby further stirring the tracer in the box body 1. Since the paddle plate 4 includes a horizontal portion 41 and an inclined portion 42, when the paddle plate 4 rotates in a circular motion, the inclined portion 42 on the paddle plate 4 stirs the tracer liquid in the box 1. At the same time, when the paddle plate 4 is acted upon by the protrusion 331 and the stopper 332 and reciprocates up and down, the horizontal portion 41 on the paddle plate 4 further stirs the tracer liquid in the box 1, so that the tracer liquid in the box 1 also moves up and down when there is a circular motion, so that the tracer liquid in the box 1 is fully stirred by the circular motion and the up and down motion. Through the mesh holes, the tracer solutions are mixed as much as possible during the rotation of the dial plate 4 and the up and down movement of the dial plate 4, so as to maintain a uniform mixing state; Due to the cooperation between the protrusion 331 and the stopper 332, when the stopper 332 moves from one end of the protrusion 331 and passes over the other end, the stopper 332 will first gradually rise, then move along the upper surface of the protrusion 331, and finally the stopper 332 will suddenly and quickly fall from the upper surface of the protrusion 331 and contact the surface of the mounting seat 33, so that the sleeve plate can drive the dial plate 4 to rise relatively slowly and move downward relatively quickly; By providing the guide surface 15, the bottom surface of the box body 1 is in an arc shape. The arc shape is used to guide the flow of the tracer liquid when the paddle 4 stirs the tracer liquid, so that the tracer liquid can flow smoothly, thereby reducing the situation where the liquid flow speed slows down or even dead corners appear in the corners and included angles of the box body 1. When the motor 14 drives the rotating shaft 2 to rotate, the connecting shaft 5 and the blades on the connecting shaft 5 will also rotate synchronously, so that the tracer solution between the mounting seat 33 and the opening of the injection pipe 12 on the box body 1 is stirred; When the tracer solution is not extracted and discharged by the high-precision constant-current pump 13, since the lower blade 52 is located in the opening of the injection pipe 12 on the housing 1, the lower blade 52 is hardly affected by the tracer liquid driven by the upper blade 51. Therefore, at this time, only the upper blade 51 rotates alone to stir and push the tracer solution below the mounting seat 33. At the same time, when the tracer solution is extracted and discharged by the high-precision constant-current pump 13, liquid will flow in the opening of the injection pipe 12 on the housing 1. At this time, the lower blade 52 will rotate under the influence of the flowing liquid. In combination with the influence of the rotation of the upper blade 51 on the liquid flow, the tracer solution between the upper blade 51 and the lower blade 52 and the nearby area will be fully stirred and mixed. By providing an isolation coating, the tracer solution residue in the delivery device is reduced, and the cleaning process when the delivery device is used again is facilitated.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A staged fracturing tracer capacity analysis test method, characterized in that: The method comprises the following steps: S1: Calculate the tracer dosage and tracer injection rate based on the staged fracturing data, such as the number of stages, the amount of fluid in each stage, etc. S2: preparing a tracer solution of a specified concentration and adding the tracer solution to the delivery device; S3: adding tracers to different layers during the fracturing process through the delivery device; S4: During the fracturing fluid flowback period, continuous sampling is performed from the sampling port of the flowback fluid pipeline; S5: After processing the collected samples, the samples are detected using an inductively coupled plasma mass spectrometer to obtain a tracer concentration curve; S6: Comprehensively analyze and process the obtained data and curves, comprehensively interpret and evaluate them, and give relevant analysis results; The delivery device comprises a box (1), an inlet pipe (11) and an injection pipe (12) are installed on the box (1), a high-precision constant-current pump (13) is installed on the injection pipe (12), a rotating shaft (2) is installed in the box (1), the rotating shaft (2) is driven by a motor (14), a sleeve shaft (3) is sleeved on the rotating shaft (2), the rotating shaft (2) and the sleeve shaft (3) are connected by a spline, and a dial plate (4) is installed on the sleeve shaft (3); A mounting plate (31) is mounted on the upper end of the sleeve shaft (3), a spring (32) is mounted on the mounting plate (31), the other end of the spring (32) is connected to the top surface of the box body (1), a mounting seat (33) is mounted on the bottom surface of the box body (1), a protrusion (331) is provided on the mounting seat (33), a stopper (332) is mounted on the lower end of the sleeve shaft (3), and the stopper (332) and the protrusion (331) cooperate with each other.

2. A staged fracturing tracer capacity analysis test method according to claim 1, characterized in that: The shift plate (4) is composed of two parts, a horizontal part (41) and an inclined part (42). The cross section of the shift plate (4) is in a "Z" shape. The horizontal part (41) is parallel to a horizontal plane, and an angle is formed between the inclined part (42) and the horizontal part (41).

3. A staged fracturing tracer capacity analysis test method according to claim 2, characterized in that: The inclined portion (42) is provided with evenly distributed mesh holes.

4. A staged fracturing tracer capacity analysis test method according to claim 2, characterized in that: The end surface of one end of the protrusion (331) is rounded, and the end surface of the other end of the protrusion (331) is perpendicular to the upper surface of the mounting seat (33).

5. The method for analyzing the production capacity of staged fracturing tracer according to claim 1, characterized in that: A guide surface (15) is provided at the edge of the bottom surface of the box body (1); the bottom surface of the box body (1) is in an arc shape; the injection pipe (12) is connected to the middle position of the bottom surface of the box body (1); the mounting seat (33) is located directly above the opening of the injection pipe (12) in the box body (1); and the inlet pipe (11) is mounted on the top cover of the box body (1).

6. A staged fracturing tracer capacity analysis test method according to claim 5, characterized in that: A connecting shaft (5) is mounted at the lower end of the rotating shaft (2), and a blade is mounted on the connecting shaft (5). The blade is located between the mounting seat (33) and the opening of the injection pipe (12) on the box body (1).

7. A staged fracturing tracer capacity analysis test method according to claim 6, characterized in that: The blades comprise an upper blade (51) and a lower blade (52); the upper blade (51) is fixedly mounted on the connecting shaft (5); and the lower blade (52) is rotatably mounted on the connecting shaft (5); the upper blade (51) is located above an opening of the injection pipe (12) on the casing (1); and the lower blade (52) is located inside the opening of the injection pipe (12) on the casing (1); and the upper blade (51) and the lower blade (52) rotate in opposite directions.

8. The method for analyzing and testing the production capacity of staged fracturing tracer according to claim 1, characterized in that: An isolation coating is arranged inside the delivery device and on the surface of each component, and the isolation coating has good hydrophobic and oleophobic properties.

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