SU1641987A2 - Device for determining phase transition of heat carrier in injection wells - Google Patents

Abstract

The invention relates to oil production. The purpose of the invention is to enhance the functionality by determining the degree of steam dryness. The device contains temperature sensors 1 and depth 2, counter 3 depth, block 4 analog-digital converter, registers 5, 6, 7, 18, 19 memory, blocks 8, 9 comparison, block 10 setpoint, elements 11, 12 , display units 13, 23, counter 14, alarm unit 15, delay element 16, control block 17, memory block 20, multiplexer 21, calculator 22. When sensor 1 is lowered into the well, counter 3 is fixed. The latter is compared in block 9 with the value of the perforation depth of the column. The previous temperature value to and the current ti enters block 8. The phase transition of the coolant is recorded, and the depth value from counter 3 is entered in register 7. The content of the latter is displayed in block 13 when the K time condition is executed T1 10 Otherwise, the phase transition depth is false. At the same time, the degree of steam dryness in the calculator 22 is calculated. To the inputs of the latter, the values ti, ti, constants from block 20, and depths from register 7 are sequentially passed through the multiplexer 21. Using the device allows you to increase the efficiency of establishing the optimum formation of steam and heat formations. 3 il. 1 tab. w «and fe

Description

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The invention relates to the oil industry and can be used in field research wells.

The purpose of the invention is to expand the functionality by automatically determining the degree of steam dryness.

FIG. 1 shows a block diagram of the device; in fig. 2 is a flow chart of its operation; in fig. 3 - characteristic thermograms of steam wells.

The drawings show: ai-av - the inputs of the control unit; bi-bs — control unit outputs; H - well depth; t is the temperature of the coolant; Nf is the depth of the phase transition of the coolant; NP - perforation depth; AI, A2, Az, A4 are the points of the beginning of the monotonous decrease in the temperature of the heat carrier.

The device includes a temperature sensor 1, a depth sensor 2, a depth counter 3, an analog-digital converter unit 4, a first memory register 5, a second memory register b, a third memory register 7, a first comparison unit 8, a second comparison unit 9, a unit 10 settings, first element 11 And, second element 12 And, first display unit .13, pulse counter 14, alarm unit 15, delay element 16, control unit 17, fourth memory register 18, fifth memory register 19, block 20 memory, multiplexer 21, calculator block 22 and second display block 23. The output of the temperature sensor 1 is connected to the information input of the analog-to-digital converter unit 4, the control input of which is connected to the first output bi of the control unit 17. The output of the analog-to-digital converter unit 4 is connected to the information input of the first memory register 5, the control input of which is connected to the third output L c of the control unit 17. The output of the first memory register 5 is connected to the first input of the first compiler 8 and to the information input of the second memory register 6, the control input of which is connected to the second output b2 of the control unit 17. The output of the second memory register 6 is connected to the second input of the first comparison unit 8, the output of which is connected to the third input az of the control unit 17. The second input 32 of the control unit 17 is simultaneously connected to the output of the depth sensor 2 and to the input of the depth counter 3, the output of which is connected to the first input of the second comparison unit 9, the second input of the second comparison unit 1 is connected to the unit 10 setpoint, and vd: connected to the fifth input 85 of the control unit 17. Fifth Iyhsd I, control block 17 is connected to the chrzz.- power to the input of the counter 14 impulses - c, Pts. S, oro: 7; oykhsd counter 14 pulses connected to the alarm unit 15, with TOOL - K- O / HV; the second element 12 And, the fourth of them ,, h-I4 of the control unit 17 and the second input. (s. start-up data) of calculator block 22. The counting of the pulse counter 14 is connected to the output of the delay element 16, the input of which is simultaneously connected to the fourth output B4 of the control unit 17 and to the first input of the pey element 11 I. The second input of the first element 11 I is connected to the first output of the counter 14 pulses. The output of the first element 11 is simultaneously connected to the control inputs of the third pei source pa 7 memory, the fourth register 18 memory and the fifth register 39 memory, the information input of the third register 7 memory is connected to the output of the depth counter 3. The output of the third memory register 7 is simultaneously connected to the first input of the second element 12 I and to the fourth information input of the multiplexer 21. The output of the second element 12 I is connected to the input of the first display unit 13. The output of the first register 5 of memory was connected to the information input of the fourth register 18 of memory. The output of the second register 6 of memory is connected to the information input of the second register of memory 19. The output of the fourth memory register 18 is connected to the second information input of the multiplexer 21. The first information input of the multiplexer 21 is connected to the output of the memory block 20. The output of the fifth memory register 19 is simultaneously connected to the address input of the memory block 20 and to the third information input of the multiplexer 21. The output of the multiplexer 21 is connected to the first input (to the information input) of the calculator 22. Five inputs (address) of multiplexer 21 are connected to the first output (address output) of calculators block 22. The second output {output to print) of calculator 22 is connected to the input of second Block 2.; / c-dicacy. The first entry a 1 of the exercise block 17 is the starting input of the device.

As a calculator block 22, an electronically programmable micro calculator is used, which allows one to enter seven to seven parameters (digital information) to enter and write to the addressable memory registers, and to process the received program information entered into the program. and you weight f / machining results on the digital keyboard.

FIG. 3 thermograms 24, 25 and 26 correspond to the presence of a phase transition of the coolant, since a monotonous decrease in the temperature of the coolant occurs above the depth Hn of the perforation of the casing; Thermogram 27 corresponds to the case of the absence of a phase transition of the coolant, since a monotonous decrease in the temperature of the coolant occurs below the depth Hp of the perforation of the casing.

The device works as follows; - zom.

When the Start signal arrives at the first input at the control unit 17, the device is reset. Then, when the temperature sensor 1 is lowered into the well, at each interval of the depth AH, one pulse appears at the output of the depth sensor 2, which simultaneously enters the input of the depth counter 3 and the second input 32 of the control unit 17. counter 3 depths Hc with the output signal of the setpoint block 10, i.e. Нс с Нп (perforation depth).

If Hc Hn, then the output of the second block 9 of the comparison receives the signal O, i.e. A signal O is received at the fifth input as of the control unit 17. At the first output bi of the control unit 17, a signal is generated which is fed to the control input (start) of the analog-digital converter unit 4. Since the output of the heat carrier temperature sensor 1 is connected to the information input of the analog-to-digital converter unit 4, in the analog-digital converter unit 4, the current value of the analog output signal of the temperature sensor 1 is converted into a digital code. Next, at the second output L of the control unit, a signal is received, which is fed to the control input {write destruction) of the second register 6 of the memory. Since the output of the first memory register 5 is connected to the information input of the second memory register 6, the previous temperature value to (in this case, 0) from the output of the first memory register 5 is written to the second memory register b. Next, at the third output Lz of the control unit 17, a signal is received that is input to the recording resolution of the first memory register 5, wherein the first current temperature value ti from the output of the analog-digital converter unit 4 is recorded in the first memory register 5. Further, the ti and to values, respectively, from the output of the first and second registers B and b of the memory, arrive respectively at the first and second inputs of the first

block 8 of the comparison, where the comparison takes place.

If ti to. then this means that there is no indication of the phase transition of the coolant. At the same time, the output of the first comparison unit 8 is not produced, the signal O is generated, which is fed to the third input az of the control unit 17. At the same time, at the fifth output bs of the control unit 17, a signal is generated, which is fed to the control input of the pulse counter 14. Next, the device enters the mode of waiting for the next signal from the output of the sensor

2 depth to the second input 32 of the control block 17.

If ti to, and / ti-toi:, where is a given number, then this means that there is a sign of a phase transition of the coolant. At the same time, the output of the first comparison unit 8 generates a signal 1, which is fed to the third input az of the control unit 17. Further, at the fourth output bA of the control unit 17, a signal is obtained, which simultaneously enters the input of the delay element 16 and the first input of the first element 11 I. Since at this moment the contents of the pulse counter 14 is zero, i.e. j 0, then there is a high potential at the first output of the pulse counter 14, which goes to the second input of the first element 11 I. At the same time, the first element 11 opens and the signal from its output goes to the control inputs of the third memory register 7, the fourth register 18 memory and p of the register 19 memory. In this case, the ti values from the output of the first register 5 of the memory are recorded in the fourth register 18 of the memory, and the values of ti-i from the output of the second register 6 of the memory are recorded in the first register 19 of the memory. Since the output of the depth counter 3 is connected to the information input of the third register 7 of the memory, the contents (HC) of the counter

3 depths, i.e. The possible value of the phase transition depth of the heat transfer medium (NfHe) from the output of the depth meter 3 is recorded in the third register 7 of the memory. Next, at the output of the delay element 16, a signal is obtained, which is fed to the counting input of the pulse counter 14. In this case, the content of the pulse counter 14 is set equal to one, i.e. j 1 and, therefore, a high potential is obtained at the first output of the pulse counter 14.

Further, upon receipt of the next signal from the output of the depth sensor 2 at the second input 32 of the control unit 17, all operations are repeated, i.e. if Ns Np. then t2 is compared with ti, etc.

The difference is that if the t2 .ti condition is not met when t2 is compared with ti, this means that the previous sign of the phase transition of the coolant is false, and the depth index Nf of the phase transition of the coolant recorded in the third register 7 memory is not real. At the same time, at the output of the first comparison unit 8, a signal O is generated, which is fed to the third input az of the control unit 17. In this case, at the fifth output bs of the control unit 17, a signal is generated, which is fed to the control input of the pulse counter 14 and sets its content to zero, i.e. . Further, upon receipt of the next signal from the output of the depth sensor 2 to the second input 32 of the control unit 17, all operations are repeated,

If, when comparing r with ti, the condition ta ti is fulfilled, with 112 being til, i.e. If the indication of the phase transition of the coolant is confirmed again, then the output of the first comparison unit 8 produces a signal 1, which is fed to the input az of the control unit 17. Further, at the fourth output D4 of the control unit 17, a signal is obtained, which simultaneously enters the input of the delay element 16 and the first input of the first element 11 I. Since at this moment the contents of the pulse counter 14 are equal to one, i.e. 1, therefore, there is a low potential at the first output of the pulse counter 14, which is fed to the second input of the first element 11 I. Therefore, in this case, the element 11 does not open and no signal is received at its output. Next, at the output of the delay element 16, a signal is obtained, which is fed to the counting input of the pulse counter 14. The content of the pulse counter 14 is set to 2, i.e. j 2.

Further, upon receipt of the next signal from the output of the depth sensor 2 to the second input 32 of the control unit 17, all the described operations are repeated, i.e. if Нс Нп, then t3 is compared with 2, etc.

If the condition ti ti-1 and Hi - ti-1 I E is successively K times fulfilled (for example, K 16), then the contents of the pulse counter 14 is set equal to K, i.e. j K and, therefore, a high potential is obtained at the second output of the pulse counter 14. This means that all signs of the phase transition of the coolant are reliable and the depth of the phase transition of the coolant (Nf) recorded in the third memory register 7 is real. Signal from the second counter 14

pulses are simultaneously fed to the fourth input a4 of the control unit 17, to the input of the alarm unit 15, to the second input of the block 22, calculate | 8l and to the second input of the second

element 12 I. Since the first input of the second element 12 I ps is connected to the output of the third memory register 7, the second element 12 I opens, and the phase transition depth of the heat carrier (Nf) from the output of the third memory register 7 enters the input of the first block 13 display. Therefore, the alarm unit 15 signals the presence of a phase transition of the coolant at a given well, and the first display unit 13 indicates the depth of the phase transition of the coolant. In addition, when a signal is received from the second output of the pulse counter 14 to the second input of the calculator block 22, the calculator block 22 begins to calculate the values of the degree of dryness of the steam X using the formula

X O-,

where AN is the increment of the depth of the well;

ti-1 is the temperature of the coolant at the depth Nf of the phase transition of the coolant; t | - temperature of the heat carrier at a depth of Nf h + A N; a is a constant coefficient (a C / h), C is the mass heat capacity of the heat carrier at

temperature corresponding to the depth of Nf, g g - heat of vaporization of the coolant at a temperature corresponding to the depth of Nf. The calculation program is given in the table.

The values of AH are preliminarily entered into the memory of the Electronics MK-46 microcalculator (in its addressable register P6).

The values of the coefficients are o: for different values of the temperature of the coolant

on the basis of reference data, are predetermined and entered into memory unit 20. The ti values are stored in the fourth memory register 18, the ti-1 values are stored in the fifth memory register 19. Nf values

stored in third memory register 7. When calculating X by the formula, the values of a tl, ti-1 and Nf are written, respectively, into addressable registers P2, P3, P4 and P5 of the Electronics MK-46 microcalculator. Besides

In addition, in the addressable register P9 of the microcalculator Electronics MK-46 is entered the experiment code: 40000003, where the number 4 corresponds to the number of its input parameters (ti, ti-1 and Nf) from external information sources (from blocks 20, 18, 19 and 7 ), and the number 3 indicates the necessity of outputting the result of calculating X to a digital printing device (second display unit 23).

The calculation process is as follows.

First, a binary code 001 is obtained at the first output of the calculator 22, which is fed to the fifth input of the multiplexer 21. In this case, the multiplexer 21 switches the output of the memory block 20 to the first input of the calculator 22, resulting in a value from the memory block 20 being transferred to block 22 calculator. Next, at the first output of the calculator 22, a binary code 010 is obtained, which is fed to the fifth input of the multiplexer 21. At the same time, the multiplexer 21 switches the output of the fourth memory register 18 to the first input of the calculator 22, resulting in ti from the fourth memory register 18 is transmitted to calculator block 22; Then, at the first output of calculator block 22, a binary code 011 is obtained, which is fed to the fifth input of multiplexer 21. At the same time, multiplexer 21 switches the output of memory register 19 to the first input of block 22 I have eaten, as a result of which the ti-t values from the fifth memory register 19 are transmitted to the calculator block 22. Further, from the first output of the calculator block 22, a binary code 100 is obtained, which is fed to the fifth input of the multiplexer 21. At the same time, the multiplexer 21 commutes the output of the third memory register 7 to the first input of the calculator block 2, as a result of which the Nf value from the third register 7 the memory is transmitted to calculator block 22. After that, the calculator block 22 calculates the X values, which from the second output of the calculator block 22, the input of the second indication block 23 is received, where the values of the degree of steam dryness are recorded. At this point, the operation of the device is terminated.

If, when comparing in the second block 9, the comparison of the contents of the depth meter 3 with the output signal of the setpoint block 10, i.e. if, when comparing Hc with Hn, it turns out that Hc E: NP, then the output of the second comparison unit 9 is signal 1, which is fed to the fifth input as of control unit 17. Since at the interval below the perforation depth of the casing, the cause of the monotonous decrease in the temperature of the coolant is the loss of steam heat in the

the formation through the perforations of the casing, when the signal 1 arrives at the fifth input as of the control unit 17, the device stops working.

As can be seen from the above, the device automatically determines both the phase transition depth of the coolant and the degree of dryness of the steam at the mouth of the steam injection wells by processing information about the coolant temperature directly during its measurement and provides operational and accurate information directly during the research of the operation of steam wells.

The use of the device allows to increase the efficiency of establishing the optimal regime of steam-thermal effects on oil reservoirs, which contributes to the increase in oil production and the efficiency of field studies of steam injection wells.

Claims (1)

The invention The device for determining the phase transition of the coolant in the injection wells according to ed. N 1551802, characterized in that, in order to expand the functionality by automatically determining the degree of dryness of steam, it is equipped with fourth and fifth memory registers, a memory unit, a multiplexer, a calculator unit and a second display unit, and the fourth memory register input connected to the output of the first memory register, the control input is connected to the output of the first element I and the control input of the fifth memory register, the input of which is connected to the output of the second memory register, the output is connected to the input of the memory block The first and second inputs of the multiplexer, the first, second, fourth and fifth inputs of which are respectively connected to the outputs of the memory block, the fourth and third memory registers and the first output of the calculator, and the output is connected to the first input of the calculator, the second input of which is connected to the second output of the pulse counter, and the output is connected to the input of the second display unit. I A lot | Bring ycfn-in 6 to the initial state all rooms 6 m / meeting} (8bl, 2g Zbes / piMl v & l0k 10 JffS7t / C / 77 {/ ff 6S / rff / f4 T 30 / t / cff / nt KodtЈ i 8 fleas 6 Hall / seven code ti 6 block 5 Include faoxfSt / bybestNf 65l. 73 compute X formula (2) sign / ni / X S & yk 23 End (Oh and v. 2