Test parameter regulation and control method of stratum test lifting device and stratum test lifting device

Abstract

The invention relates to the technical field of formation fluid exploitation, in particular to a test parameter regulation and control method of a formation test lifting device and the formation test lifting device.The test parameter regulation and control method comprises the steps that A, the pump pressure of a power liquid pump is set; s101, pressure distribution of return liquid from a return liquid outlet of the jet pump to an upper port of the first annulus is calculated, and whether the pressure of the return liquid at the upper port of the first annulus is not smaller than 0 or not is judged; s102, when the return liquid pressure of the upper port of the first annulus is smaller than 0, the pump pressure of a power liquid pump is set, and the step S101 and the step S102 are executed; and when the return liquid pressure of the upper port of the first annulus is not smaller than 0, the final pump pressure of the power liquid pump is output. The final pumping pressure Pinj is output under the condition that the return liquid pressure of the upper port of the first annulus 104 is not smaller than 0, it is ensured that the formation fluid can be stably conveyed to the ground, and the formation fluid yield testing accuracy is improved.

Description

Technical Field

[0001] This application relates to the field of formation fluid extraction technology, specifically to a method for adjusting test parameters of a formation testing lifting device and the formation testing lifting device itself. Background Technology

[0002] The relevant test parameters in the formation testing lifting device are all adjusted based on experience, resulting in low accuracy in testing formation fluid production. Summary of the Invention

[0003] The purpose of this application is to provide a method for adjusting test parameters of a formation testing lifting device and a formation testing lifting device, so as to solve the problem of low accuracy in testing formation fluid production.

[0004] To address the aforementioned technical problems, this application provides a method for adjusting test parameters of a formation testing lifting device. The formation testing lifting device includes a hydraulic pump, an outer tube, an inner tube, and a jet pump. The inner tube is inserted inside the outer tube, forming a first annulus between the outer tube and the inner tube. The upper port of the inner tube is connected to the hydraulic pump, the hydraulic inlet of the jet pump is connected to the lower port of the inner tube, and the return fluid outlet of the jet pump is connected to the lower port of the first annulus. The parameter adjustment method includes step A:

[0005] Step S100: Set the pump pressure P of the power hydraulic pump. inj ;

[0006] Step S101: Calculate the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus, and determine whether the return liquid pressure at the upper port of the first annulus is not less than 0.

[0007] Step S102: When the return liquid pressure at the upper port of the first annulus is less than 0, set the pump pressure of the power hydraulic pump. The process repeats steps S101 and S102; when the return liquid pressure at the upper port of the first annulus is not less than 0, the final pump pressure P of the power hydraulic pump is output. inj .

[0008] Optionally, the jet pump includes a nozzle;

[0009] Step S100 further includes: setting the displacement Q of the power hydraulic pump. inj Set the diameter d of the nozzle. m ;

[0010] Step A, following step S101, further includes:

[0011] Step S102: Set the displacement of the power hydraulic pump. ;

[0012] Step S103: Recalculate the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus, and determine whether the return liquid pressure at the upper port of the first annulus is not less than 0.

[0013] Step S104: When the return liquid pressure at the upper port of the first annulus is less than 0, output the final displacement of the power hydraulic pump. The final diameter d of the nozzle m If the return liquid pressure at the upper port of the first annulus is not less than 0, proceed to step S105.

[0014] Step S105: Set the displacement of the power hydraulic pump. And determine the displacement Q of the power hydraulic pump. inj Is it not less than the maximum displacement on site; the displacement Q of the power hydraulic pump inj If the displacement is less than the maximum displacement on site, repeat step S105; when the displacement Q of the power hydraulic pump is less than the maximum displacement on site... inj If the displacement is not less than the maximum displacement on site, proceed to step S106;

[0015] Step S106: Set the diameter of the nozzle And repeat steps S103-S106.

[0016] Optionally, step S100 further includes: setting the injection temperature T of the power fluid. inj ;

[0017] Step A further includes:

[0018] Step S200: Calculate the temperature distribution of the returned liquid from the outlet of the jet pump to the upper port of the first annulus, and determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid; if the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, set the injection temperature of the power fluid. And repeat step S200; if the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid, execute step S201;

[0019] Step S201: Set the injection temperature of the power fluid. , The temperature distribution of the returned liquid from the outlet of the jet pump to the upper port of the first annulus is recalculated to determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid. If the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid, step S201 is repeated. If the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, the final injection temperature of the power fluid is output. .

[0020] Optionally, the pressure P1 at the return liquid outlet of the jet pump is obtained. Using the pressure P1 at the return liquid outlet of the jet pump as a boundary condition, the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus is calculated as follows:

[0021] ;

[0022] in:

[0023] P—Return fluid pressure, Pa;

[0024] —Returned liquid density, kg / m³ 3 ;

[0025] g—acceleration due to gravity;

[0026] A—Cross-sectional area of ​​the outer tube;

[0027] D—Inner diameter of the outer tube, in meters;

[0028] G m —Returned liquid mass flow rate, kg / s;

[0029] f m —The friction coefficient between two phases is dimensionless.

[0030] Optionally, using the temperature T3 at the inlet of the jet pump and the return fluid temperature T2 as boundary conditions, the return fluid temperature distribution from the outlet of the jet pump to the upper port of the first annulus is calculated as follows:

[0031] ;

[0032] in, ; ; ;

[0033] T a —Return liquid temperature, °C;

[0034] T w —Power fluid temperature, °C;

[0035] T e — Formation temperature, °C;

[0036] r lri —Inner diameter of the inner tube, in meters;

[0037] U ct —The overall heat transfer coefficient between the first annulus and the interior of the inner tube. ;

[0038] r ti —Inner diameter of the outer tube, in meters;

[0039] k e — Thermal conductivity of the formation ;

[0040] U a —The overall heat transfer coefficient between the wall portion forming the first annulus and the fluid. ;

[0041] f(t D — Dimensionless temperature.

[0042] Optionally, the jet pump has a formation fluid intake port, and obtaining the temperature T3 of the power fluid inlet of the jet pump includes:

[0043] The temperature T1 of the formation fluid inlet of the jet pump and the temperature T2 of the return fluid are obtained; the temperature T3 of the power fluid inlet of the jet pump is calculated as follows:

[0044] ;

[0045] in, The mass flow rate (kg / s) of the formation fluid, the mixture of formation fluid and kinetic fluid, and the kinetic fluid drawn into the jet pump; The specific heat capacity of formation fluids, mixtures of formation fluids and dynamic fluids, and dynamic fluids. .

[0046] Optionally, step A is performed at preset time intervals.

[0047] This application also provides a formation testing lifting device, applicable to the aforementioned formation testing lifting device test parameter control method. The formation testing lifting device includes a power hydraulic pump, an outer tube, an inner tube, and a jet pump. The inner tube is inserted inside the outer tube, and a first annulus is formed between the outer tube and the inner tube. The upper port of the inner tube is connected to the power hydraulic pump. The jet pump has a power hydraulic inlet and a return outlet. The power hydraulic inlet of the jet pump is connected to the lower port of the inner tube, and the return outlet of the jet pump is connected to the lower port of the first annulus.

[0048] Optionally, the jet pump has a formation fluid inlet, and the formation test lifting device further includes a temperature sensor disposed at the formation fluid inlet of the jet pump, and a temperature and pressure sensor disposed at the return liquid outlet of the jet pump.

[0049] And / or, the formation testing lifting device further includes a power fluid storage tank for storing power fluid, and a heating rod configured to heat the power fluid in the power fluid storage tank, the power fluid storage tank being connected to the power fluid pump;

[0050] And / or, the formation testing lifting device further includes a liquid flow meter connected between the power pump and the inner tube.

[0051] Optionally, the jet pump has a nozzle, and the formation testing lifting device further includes a control cabinet, which is electrically connected to the nozzle, the power hydraulic pump, the heating rod, the temperature sensor, and the temperature and pressure sensor.

[0052] The method for controlling the test parameters of the formation testing lifting device in this application involves accurately calculating the return fluid pressure distribution from the return fluid outlet of the jet pump to the upper port of the first annulus. When the return fluid pressure at the upper port of the first annulus is not less than 0, the final pump pressure P of the power hydraulic pump is output. inj This ensures that the returned fluid can fully overcome the sum of gravity pressure drop and frictional pressure drop during the lifting process. Gravity pressure drop is the downward pressure generated by the weight of the returned fluid itself during the lifting process, while frictional pressure drop is the frictional resistance between the returned fluid and the inner wall forming the first annulus during the lifting process. When the returned fluid pressure at the upper end of the first annulus is not less than 0, it indicates that the returned fluid has sufficient upward driving force, avoiding the inability of the returned fluid to be lifted smoothly due to insufficient driving force. This ensures that the formation fluid can be continuously and stably transported to the surface, thereby improving the accuracy of testing formation fluid production and solving the problem of low accuracy in testing formation fluid production.

[0053] Meanwhile, the test parameter control method of the formation testing lifting device in this application adjusts the pump pressure P of the power hydraulic pump through step-by-step iterative adjustment. inj The pump pressure P of the power hydraulic pump inj The adjustment amount is ΔP, which can be set according to actual testing requirements to achieve the adjustment of the pump pressure P of the power hydraulic pump. inj Fine-tuning to avoid issues caused by variations in the pump pressure P of the power hydraulic pump. inj Excessive adjustment increases the energy consumption of the power hydraulic pump, thus hindering the economic efficiency of the formation testing lifting device. Attached Figure Description

[0054] Figure 1 A schematic diagram of a specific embodiment of the formation testing lifting device provided in this application;

[0055] Figure 2 A flowchart of a specific embodiment of the test parameter control method for the formation testing lifting device provided in this application;

[0056] Explanation of reference numerals in the attached figures:

[0057] 100 Power hydraulic pump; 101 Outer pipe; 102 Inner pipe; 103 Jet pump; 103-1- Nozzle; 104 First annulus; 105 Sleeve; 106 Second annulus; 107 Power hydraulic storage tank; 108 Heating rod; 109 Liquid flow meter; 110 Control cabinet. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0061] In this description, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0062] Please refer to Figures 1-2 , Figure 1 A schematic diagram of a specific embodiment of the formation testing lifting device provided in this application; Figure 2 This is a flowchart of a specific embodiment of the test parameter control method for the formation testing lifting device provided in this application.

[0063] This application provides a method for adjusting test parameters of a formation testing lifting device. The formation testing lifting device includes a hydraulic pump 100, an outer tube 101, an inner tube 102, and a jet pump 103. The inner tube 102 is inserted inside the outer tube 101, forming a first annulus 104 between the outer tube 101 and the inner tube 102. The upper port of the inner tube 102 is connected to the hydraulic pump 100, the hydraulic inlet of the jet pump 103 is connected to the lower port of the inner tube 102, and the return fluid outlet of the jet pump 103 is connected to the lower port of the first annulus 104. The hydraulic pump 100 provides hydraulic fluid. (Such as water), is transported downward through the inner pipe 102 to the power fluid inlet of the jet pump 103. The jet pump 103 usually also has a nozzle 103-1. When the high-speed power fluid is ejected from the nozzle 103-1, a local negative pressure is formed in the mixing chamber inside the jet pump 103, which draws the formation fluid into the mixing chamber. After the drawn formation fluid and the power fluid are mixed in the mixing chamber to form a return fluid, it enters the first annulus 104 through the return fluid outlet of the jet pump 103. Under the action of pressure, the return fluid flows upward along the first annulus 104 and is discharged back to the ground, completing the lifting of the formation fluid.

[0064] The test parameter adjustment method includes step A:

[0065] Step S100: Set the pump pressure P of the power hydraulic pump 100. inj ;

[0066] Step S101: Calculate the return liquid pressure distribution from the return liquid outlet of the jet pump 103 to the upper port of the first annulus 104, and determine whether the return liquid pressure at the upper port of the first annulus 104 is not less than 0; if the return liquid pressure at the upper port of the first annulus 104 is less than 0, set the pump pressure of the power hydraulic pump 100. And repeat step S101; when the return liquid pressure at the upper port of the first annular space 104 is not less than 0, output the final pump pressure P of the power pump 100. inj .

[0067] The method for adjusting the test parameters of the formation testing lifting device in this application embodiment, by accurately calculating the return fluid pressure distribution from the return fluid outlet of the jet pump 103 to the upper port of the first annulus 104, outputs the final pump pressure P of the power hydraulic pump 100 when the return fluid pressure at the upper port of the first annulus 104 is not less than 0. injThis ensures that the returned fluid can fully overcome the sum of gravity pressure drop and frictional pressure drop during the lifting process. Gravity pressure drop is the downward pressure generated by the weight of the returned fluid itself during the lifting process, while frictional pressure drop is the frictional resistance between the returned fluid and the inner wall of the first annulus 104 during the lifting process. When the returned fluid pressure at the upper port of the first annulus 104 is not less than 0, it indicates that the returned fluid has sufficient upward driving force. This avoids the return fluid from failing to lift smoothly due to insufficient driving force, ensuring that the formation fluid can be continuously and stably transported to the surface, thereby improving the accuracy of testing formation fluid production and solving the problem of low accuracy in testing formation fluid production.

[0068] Meanwhile, the test parameter control method of the formation testing lifting device in this application embodiment adjusts the pump pressure P of the power hydraulic pump 100 step by step through iterative adjustment. inj The pump pressure P of the power hydraulic pump 100 inj The single adjustment amount is ΔP, which can be set according to actual testing requirements. In some embodiments, ΔP is 1 Pa, achieving the pump pressure P of the power hydraulic pump 100. inj Fine-tuning is required to avoid pump pressure P of the power hydraulic pump 100. inj Excessive adjustment results in wasted power fluid energy, hindering the economic efficiency of formation testing lifting devices.

[0069] Please continue to refer to this. Figures 1-2 In this embodiment of the application, the jet pump 103 includes a nozzle 103-1;

[0070] Step S100 further includes: setting the displacement Q of the power hydraulic pump 100. inj Set the diameter d of nozzle 103-1 m ;

[0071] Step A, following step S101, further includes:

[0072] Step S102: Set the displacement of the power hydraulic pump 100. ;

[0073] Step S103: Recalculate the return liquid pressure distribution from the return liquid outlet of the jet pump 103 to the upper port of the first annulus 104, and determine whether the return liquid pressure at the upper port of the first annulus 104 is not less than 0.

[0074] In step S104, when the return liquid pressure at the upper port of the first annular cavity 104 is less than 0, the final displacement of the power hydraulic pump 100 is output. The final diameter d of nozzle 103-1 m If the return liquid pressure at the upper port of the first annular cavity 104 is not less than 0, proceed to step S105.

[0075] Step S105: Set the displacement of the power hydraulic pump 100. And determine the displacement Q of the power hydraulic pump 100. inj Is it not less than the maximum displacement on site; with a displacement Q of 100 for the power hydraulic pump? inj If the displacement is less than the maximum displacement on site, repeat step S105; when the displacement Q of the power hydraulic pump 100 is less than the maximum displacement on site. inj If the displacement is not less than the maximum displacement on site, proceed to step S106;

[0076] Step S106: Set the diameter of nozzle 103-1 And repeat steps S103-S106.

[0077] As set above, steps S102 to S105 affect the displacement Q of the power hydraulic pump 100. inj Adjustments were made by gradually increasing the displacement Q of the power hydraulic pump 100. inj The displacement Q of the power hydraulic pump 100 inj The single adjustment amount is ΔQ, which can be set according to actual testing requirements. In some embodiments, ΔQ is 0.1, thereby adjusting the displacement Q of the power hydraulic pump 100. inj The fine-tuning ensures that the return liquid pressure at the upper port of the first annulus 104 is not less than 0, and that the displacement Q of the power hydraulic pump 100 is [missing information]. inj To obtain the displacement Q of the power hydraulic pump 100 when the displacement is less than the maximum displacement on site. inj Maximum limit.

[0078] Step S106 introduces the diameter d of nozzle 103-1. m As an adjustment variable, the diameter d of nozzle 103-1 is reduced. m Under the condition that the return liquid pressure at the upper port of the first annular cavity 104 is not less than 0, the displacement Q of the power hydraulic pump 100 is obtained. inj Maximum limit and nozzle 103-1 diameter d m The minimum limit is set so that the formation fluid intake pressure of the jet pump 103 is sufficiently small, thereby increasing the difference between the formation fluid intake pressure and the production pressure of the jet pump 103, thus maximizing the intake efficiency and intake volume of the formation fluid, and improving the accuracy and reliability of the formation fluid production test.

[0079] As can be seen from the above description, the embodiments of this application address the displacement Q of the power hydraulic pump 100. inj and the diameter d of nozzle 103-1 m During regulation, the return fluid pressure at the upper port of the first annulus 104 should always be no less than 0, so as to ensure stable lifting of the return fluid while increasing the intake of formation fluid.

[0080] Among them, the diameter d of nozzle 103-1 m The single adjustment amount is △d, which can be set according to actual testing requirements. In some embodiments, △d is 0.1mm.

[0081] Please continue to refer to this. Figure 2 In this embodiment of the application, step S100 further includes: setting the injection temperature T of the power fluid. inj ;

[0082] Step A also includes:

[0083] Step S200: Calculate the temperature distribution of the returned liquid from the outlet of the jet pump 103 to the upper port of the first annulus 104, and determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid; if the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, set the injection temperature of the power fluid. And repeat step S200; if the minimum temperature of the returned fluid is not less than the freezing point temperature of the formation fluid, execute step S201;

[0084] Step S201: Set the injection temperature of the power fluid. , The temperature distribution of the returned liquid from the outlet of the jet pump 103 to the upper port of the first annulus 104 is recalculated to determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid. If the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid, step S201 is repeated. If the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, the final injection temperature of the power fluid is output. .

[0085] As set above, this embodiment of the application further specifies the injection temperature T of the power fluid. inj To regulate the flow, step S200 involves gradually increasing the injection temperature T of the power fluid. inj This ensures that the minimum temperature of the returned fluid is not lower than the freezing point temperature of the formation fluid, preventing the formation fluid from solidifying and depositing on the inner wall of the first annulus 104 due to excessively low temperature during the lift process. This improves the fluidity of the returned fluid and ensures that it can be continuously and smoothly transported upward along the first annulus 104, thereby improving the accuracy of testing the formation fluid production.

[0086] In step S200, the injection temperature T of the power fluid is... inj The single adjustment amount is △T1, which can be set according to actual testing requirements. In some embodiments, △T1 is 1℃.

[0087] Step S201, under the premise of ensuring that the formation fluid does not solidify, gradually reduces the injection temperature of the power fluid with a smaller single adjustment amount ΔT2, so as to achieve a more refined adjustment of the injection temperature of the power fluid, find the critical value of the injection temperature of the power fluid and use it as the final output value, and minimize energy consumption while ensuring that it does not solidify.

[0088] △T2 can be set according to actual testing requirements. In some embodiments, △T1 is 0.5℃.

[0089] In this embodiment, the pressure P1 of the return liquid outlet of the jet pump 103 is obtained. Taking the pressure P1 of the return liquid outlet of the jet pump 103 as a boundary condition, the return liquid pressure distribution from the return liquid outlet of the jet pump 103 to the upper port of the first annulus 104 is calculated as follows:

[0090] ;

[0091] in:

[0092] P—Return fluid pressure, Pa;

[0093] —Density of mixed phase, kg / m³ 3 ;

[0094] g—acceleration due to gravity;

[0095] A—Cross-sectional area of ​​the outer tube;

[0096] D—Inner diameter of the outer tube, in meters;

[0097] G m —Mass flow rate of gas-liquid mixture, kg / s;

[0098] f m —The friction coefficient between two phases is dimensionless.

[0099] As set above, this application embodiment fully considers the gas-liquid two-phase flow characteristics of the returned liquid, adopts a gas-liquid two-phase flow calculation model, and uses the Hagedorn-Brown method to calculate the pressure distribution of the returned liquid, which helps to improve the accuracy of pressure distribution calculation and ensure the stability of the returned liquid lifting process.

[0100] The pressure P1 at the return liquid outlet of the jet pump 103 can be obtained by a pressure sensor installed at the return liquid outlet of the jet pump 103.

[0101] In this embodiment of the application, with the temperature T3 at the inlet of the jet pump 103 and the return liquid temperature T2 as boundary conditions, the return liquid temperature distribution from the return liquid outlet of the jet pump 103 to the upper port of the first annulus 104 is calculated as follows:

[0102] ;

[0103] in, ; ; ;

[0104] T a —Return liquid temperature, °C;

[0105] T w —Power fluid temperature, °C;

[0106] T e — Formation temperature, °C;

[0107] r lri —Inner diameter of the inner tube, in meters;

[0108] U ct —The overall heat transfer coefficient between the first annulus and the interior of the inner tube. ;

[0109] r ti —Inner diameter of the outer tube, in meters;

[0110] k e — Thermal conductivity of the formation ;

[0111] U a —The overall heat transfer coefficient between the wall portion forming the first annulus and the fluid. ;

[0112] f(t D — Dimensionless temperature.

[0113] As set above, this embodiment of the application uses the temperature T3 of the power fluid inlet of the jet pump 103 and the temperature T2 of the return fluid as boundary conditions, so that the return fluid temperature distribution calculation model of this application conforms to the actual operating conditions of the device, obtains a more accurate return fluid temperature distribution, ensures that temperature control can effectively solve the solidification risk, and find the critical temperature with optimal energy consumption, thus achieving a balance between the stable operation and economy of the formation test lifting device.

[0114] The return liquid temperature T2 can be obtained by a temperature sensor installed at the return liquid outlet of the jet pump 103.

[0115] The jet pump 103 has a formation fluid intake port, and the temperature T3 of the power fluid inlet of the jet pump 103 is obtained by:

[0116] The temperature T1 of the formation fluid intake and the temperature T2 of the return fluid at the jet pump 103 are obtained; the temperature T3 of the power fluid inlet of the jet pump 103 is calculated as follows:

[0117] ;

[0118] in, The mass flow rate (kg / s) of the formation fluid, the mixture of formation fluid and dynamic fluid, and the dynamic fluid drawn into the jet pump 103; The specific heat capacity of formation fluids, mixtures of formation fluids and dynamic fluids, and dynamic fluids. .

[0119] Since the temperature T3 of the power fluid inlet of the jet pump 103 cannot be directly measured by a temperature sensor, this application obtains the temperature T3 of the power fluid inlet of the jet pump 103 based on the principle of thermal balance by using the temperature T1 of the formation fluid suction port and the temperature T2 of the return fluid. The calculation result is more accurate, thus enabling a more precise return fluid temperature distribution, and ultimately ensuring the accuracy of the return fluid lifting stability and formation fluid production test.

[0120] The temperature T1 of the formation fluid inlet of the jet pump 103 can be obtained by a temperature sensor installed at the formation fluid inlet of the jet pump 103.

[0121] Because field data is volatile and the adjustment of ground test parameters has a certain lag, this application executes step A at preset intervals. The preset intervals can be set according to actual test requirements, such as adjusting the test parameters once every 10 minutes.

[0122] This application embodiment also provides a formation testing lifting device, applicable to the aforementioned formation testing lifting device test parameter control method. The formation testing lifting device includes a power hydraulic pump 100, an outer tube 101, an inner tube 102, and a jet pump 103. The inner tube 102 is inserted inside the outer tube 101, and a first annulus 104 is formed between the outer tube 101 and the inner tube 102. The upper port of the inner tube 102 is connected to the power hydraulic pump 100. The jet pump 103 has a power hydraulic inlet and a return outlet. The power hydraulic inlet of the jet pump 103 is connected to the lower port of the inner tube 102, and the return outlet of the jet pump 103 is connected to the lower port of the first annulus 104.

[0123] As configured above, the power fluid pump 100 provides power fluid (such as water), which is delivered downward through the inner pipe 102 to the power fluid inlet of the jet pump 103. The jet pump 103 typically also has a nozzle 103-1. When the high-speed power fluid is ejected from the nozzle 103-1, a local negative pressure is formed in the mixing chamber inside the jet pump 103, which draws the formation fluid into the mixing chamber. After the drawn formation fluid and the power fluid are mixed in the mixing chamber to form a return fluid, it enters the first annulus 104 through the return fluid outlet of the jet pump 103. Under pressure, the return fluid flows upward along the first annulus 104 and is discharged back to the ground, completing the lifting of the formation fluid.

[0124] The formation testing lifting device of this application embodiment is applicable to the aforementioned formation testing lifting device test parameter control method, and therefore has the same technical effect as the aforementioned formation testing lifting device test parameter control method, which will not be repeated here.

[0125] Depend on Figure 1 As can be seen, in this embodiment of the application, the formation testing lifting device also includes a sleeve 105, which is fitted around the outer periphery of the outer tube 101, and a second annulus 106 is formed between the outer tube 101 and the sleeve 105.

[0126] As configured above, the casing 105 firstly provides support, effectively preventing formation collapse from damaging the outer pipe 101 and the inner pipe 102; secondly, a second annulus 106 is formed between the outer pipe 101 and the casing 105. The second annulus 106 can serve as a heat insulation layer between the returned fluid and the formation, reducing the direct heat exchange between the returned fluid and the formation in the first annulus 104, allowing the returned fluid to maintain a higher temperature and a lower viscosity during the lifting process, reducing the flow resistance of the returned fluid, and improving the return flow efficiency.

[0127] Depend on Figure 1 As can be seen, in this embodiment of the application, the jet pump 103 has a formation fluid inlet, and the formation test lifting device further includes a temperature sensor disposed at the formation fluid inlet of the jet pump 103, and a temperature and pressure sensor disposed at the return liquid outlet of the jet pump 103.

[0128] The temperature sensor installed at the formation fluid inlet of the jet pump 103 is used to obtain the temperature T1 of the formation fluid inlet of the jet pump 103; the temperature and pressure sensor installed at the return liquid outlet of the jet pump 103 is used to obtain the pressure P1 and the return liquid temperature T2 at the return liquid outlet of the jet pump 103, so as to obtain the return liquid pressure distribution and temperature distribution and realize intelligent control of test parameters.

[0129] Depend on Figure 1 As can be seen, in this embodiment of the application, the formation test lifting device also includes a power fluid storage tank 107 for storing power fluid, and a heating rod 108. The heating rod 108 is configured to heat the power fluid in the power fluid storage tank 107. The power fluid storage tank 107 is connected to the power fluid pump 100.

[0130] As configured above, the power fluid storage tank 107 can stably supply power fluid to the power fluid pump 100. The heating rod 108 acts directly on the power fluid in the power fluid storage tank 107. The initial temperature of the power fluid can be precisely controlled by adjusting the heating power of the heating rod 108. Specifically, when it is necessary to increase the injection temperature Tinj of the power fluid to prevent the return fluid from solidifying, the heating rod 108 can heat up quickly; when it is necessary to decrease the injection temperature Tinj of the power fluid, the heating rod 108 can reduce its power or stop heating to ensure that the temperature parameters always meet the requirement that the return fluid does not solidify.

[0131] Depend on Figure 1 As can be seen, in this embodiment of the application, the formation testing lifting device also includes a liquid flow meter 109, which is connected between the power hydraulic pump 100 and the inner tube 102.

[0132] As configured above, the liquid flow meter 109 is connected between the power pump 100 and the inner tube 102, enabling real-time and accurate measurement of the actual flow rate of the power fluid, which facilitates the determination of the displacement Q of the power pump 100. inj Adjustments.

[0133] In addition, in this embodiment of the application, the jet pump 103 has a nozzle 103-1, and the formation test lifting device also includes a control cabinet 110. The control cabinet 110 is electrically connected to the nozzle 103-1, the power hydraulic pump 100, the heating rod 108, the temperature sensor, and the temperature and pressure sensor.

[0134] As set up above, this embodiment of the application uses a control cabinet 110 to perform judgment and analysis based on the calculated return liquid temperature distribution and return liquid pressure distribution results, and to adjust the pump pressure P of the power hydraulic pump 100. inj The displacement Q of the power hydraulic pump 100 inj The injection temperature T of the power fluid inj The diameter of nozzle 103-1 is adjusted to meet the needs of on-site testing while saving energy to the greatest extent, thus solving the problems of blindness and experience-based manual adjustment of test parameters on-site.

[0135] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for adjusting test parameters of a formation testing lifting device, characterized in that, The formation testing lifting device includes a power hydraulic pump, an outer tube, an inner tube, and a jet pump. The inner tube is inserted inside the outer tube, forming a first annulus between the outer tube and the inner tube. The upper port of the inner tube is connected to the power hydraulic pump, the power hydraulic inlet of the jet pump is connected to the lower port of the inner tube, and the return fluid outlet of the jet pump is connected to the lower port of the first annulus. The test parameter adjustment method includes step A: Step S100: Set the pump pressure P of the power hydraulic pump. inj ; Step S101: Calculate the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus, and determine whether the return liquid pressure at the upper port of the first annulus is not less than 0; if the return liquid pressure at the upper port of the first annulus is less than 0, set the pump pressure of the power hydraulic pump. The process repeats step S101; when the return liquid pressure at the upper port of the first annulus is not less than 0, the final pump pressure P of the power hydraulic pump is output. inj .

2. The method for adjusting test parameters of the formation testing lifting device according to claim 1, characterized in that, The jet pump includes a nozzle; Step S100 further includes: setting the displacement Q of the power hydraulic pump. inj Set the diameter d of the nozzle. m ; Step A, following step S101, further includes: Step S102: Set the displacement of the power hydraulic pump. ; Step S103: Recalculate the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus, and determine whether the return liquid pressure at the upper port of the first annulus is not less than 0. Step S104: When the return liquid pressure at the upper port of the first annulus is less than 0, output the final displacement of the power hydraulic pump. The final diameter d of the nozzle m If the return liquid pressure at the upper port of the first annulus is not less than 0, proceed to step S105. Step S105: Set the displacement of the power hydraulic pump. And determine the displacement Q of the power hydraulic pump. inj Is it not less than the maximum displacement on site; the displacement Q of the power hydraulic pump inj If the displacement is less than the maximum displacement on site, repeat step S105; when the displacement Q of the power hydraulic pump is less than the maximum displacement on site... inj If the displacement is not less than the maximum displacement on site, proceed to step S106; Step S106: Set the diameter of the nozzle And repeat steps S103-S106.

3. The method for adjusting test parameters of the formation testing lifting device according to claim 1, characterized in that, Step S100 further includes: setting the injection temperature T of the power fluid. inj ; Step A further includes: Step S200: Calculate the temperature distribution of the returned liquid from the outlet of the jet pump to the upper port of the first annulus, and determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid; if the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, set the injection temperature of the power fluid. And repeat step S200; if the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid, execute step S201; Step S201: Set the injection temperature of the power fluid. , The temperature distribution of the returned liquid from the outlet of the jet pump to the upper port of the first annulus is recalculated to determine whether the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid. If the minimum temperature of the returned liquid is not less than the freezing point temperature of the formation fluid, step S201 is repeated. If the minimum temperature of the returned liquid is less than the freezing point temperature of the formation fluid, the final injection temperature of the power fluid is output. .

4. The method for adjusting test parameters of the formation testing lifting device according to claim 1, characterized in that, The pressure P1 at the return liquid outlet of the jet pump is obtained. Using the pressure P1 at the return liquid outlet of the jet pump as a boundary condition, the return liquid pressure distribution from the return liquid outlet of the jet pump to the upper port of the first annulus is calculated as follows: ； in: P—Return fluid pressure, Pa; —Returned liquid density, kg / m³ 3 ; g—acceleration due to gravity; A—Cross-sectional area of ​​the outer tube; D—Inner diameter of the outer tube, in meters; G m —Returned liquid mass flow rate, kg / s; f m —The friction coefficient between the two phases is dimensionless.

5. The method for adjusting test parameters of the formation testing lifting device according to claim 3, characterized in that, Using the temperature T3 at the inlet of the jet pump and the return fluid temperature T2 as boundary conditions, the return fluid temperature distribution from the return fluid outlet of the jet pump to the upper port of the first annulus is calculated as follows: ； in, ; ; ; T a —Return liquid temperature, °C; T w —Power fluid temperature, °C; T e — Formation temperature, °C; r lri —Inner diameter of the inner tube, in meters; U ct —The overall heat transfer coefficient between the first annulus and the inside of the inner tube. ; r ti —Inner diameter of the outer tube, in meters; k e — Thermal conductivity of the formation ; U a —The overall heat transfer coefficient between the wall portion forming the first annulus and the fluid. ; f(t D — Dimensionless temperature.

6. The method for adjusting test parameters of the formation testing lifting device according to claim 5, characterized in that, The jet pump has a formation fluid intake port, and the temperature T3 of the power fluid inlet of the jet pump is obtained by: The temperature T1 of the formation fluid inlet of the jet pump and the temperature T2 of the return fluid are obtained; the temperature T3 of the power fluid inlet of the jet pump is calculated as follows: ； in, The mass flow rate (kg / s) of the formation fluid, the mixture of formation fluid and kinetic fluid, and the kinetic fluid drawn into the jet pump; The specific heat capacity of formation fluids, mixtures of formation fluids and dynamic fluids, and dynamic fluids. .

7. The method for adjusting test parameters of the formation testing lifting device according to any one of claims 1-6, characterized in that, Step A is executed at preset time intervals.

8. A formation testing lifting device, applicable to the test parameter adjustment method of the formation testing lifting device according to any one of claims 1-7, characterized in that, The formation testing lifting device includes a power hydraulic pump, an outer tube, an inner tube, and a jet pump. The inner tube is inserted inside the outer tube, and a first annulus is formed between the outer tube and the inner tube. The upper port of the inner tube is connected to the power hydraulic pump. The jet pump has a power hydraulic inlet and a return outlet. The power hydraulic inlet of the jet pump is connected to the lower port of the inner tube, and the return outlet of the jet pump is connected to the lower port of the first annulus.

9. The formation testing lifting device according to claim 8, characterized in that, The jet pump has a formation fluid intake port, and the formation test lifting device further includes a temperature sensor disposed at the formation fluid intake port of the jet pump, and a temperature and pressure sensor disposed at the return liquid outlet of the jet pump. And / or, the formation testing lifting device further includes a power fluid storage tank for storing power fluid, and a heating rod configured to heat the power fluid in the power fluid storage tank, the power fluid storage tank being connected to the power fluid pump; And / or, the formation testing lifting device further includes a liquid flow meter connected between the power pump and the inner tube.

10. The formation testing lifting device according to claim 9, characterized in that, The jet pump has a nozzle, and the formation testing lifting device also includes a control cabinet. The control cabinet is electrically connected to the nozzle, the power hydraulic pump, the heating rod, the temperature sensor, and the temperature and pressure sensor.

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