SU1382940A1 - Weighing yield meter - Google Patents

Description

| (21) 4112962 / 22-03

(22) 06/18/86

(46) 03/23/88. Bnsh. 1 11

(71) Research and Development Institute for Integrated Automation in the Oil and Chemical Industry

(72) A.G.Rzayev, Z.A.Abbasov and V.I.Loschenov

(53) 681.121 (088.8) (56) Isakovich R, I. Technological measurements and devices. - M .: Nedra, 1970, p. 465-466, 472-473.

(54) WEIGHT DEBITOMER (57) FIELD OF THE INVENTION relates to petroleum and petroleum industry. The goal is to increase measurement accuracy. The debitometer contains measuring separator 3, piezometric pressure sensors 29,30,31, respectively, of oil fluid, produced water (PT) and clean oil (PR), valves 9, 10-12 and 13,15 of drain and filling lines, capacity 7 for draining formation water, two differential meters 32 and 33, multiplying-dividing unit

i4r

27-28

cl

with

00 ND F i4

 i4, converter 35 t-ry and signaling devices of level PV 25 and CHN 28, connected to the inputs of the indication control unit 1 (CID) 8. Inside the separator 3, there are installed 17, 21, 3 and 26 partitions with the formation of a capacitance 14 р ( D1 changes the density of PV, containers | 16 and 27, filled with PV, and containers 22, 24, and 27, filled with PR. After filling the container 7 with petroleum fluid to the upper edge of the partition 21 and dynamically separating it into components (layer 18 PV, intermediate layer 19 and layer 20 (CHN) CHN is poured into container 22, and from there into

The invention relates to the extraction of oil and can be used in the oil production and refining industries. i The aim of the invention is to increase the measurement accuracy.

. The drawing shows the flow chart of the weight debitometer.

The oil on the (common) fluid (NC) from the well (not shown) containing produced water (TF), pure oil (PN) and gas, through line 1 through valve 2 enters measuring separator 3, where it is divided into gas and liquid phase The gas phase from the upper part of the separator 3 through the pipeline 4 in parallel enters the upper part of the cylindrical vertical measuring tank 5 and the common collector 6, and the liquid phase accumulates in the tank 7 formed between the wall and the three partitions mounted inside the separator. The moment of arrival of the NC in the separator is determined on the control and display unit 8 (CID). According to the signals supplied from the CID 8, the valves 9-12, installed on the discharge pipes, respectively, PV and ShH to the collector 6, also valve 13, installed on the PV drain pipe from the separator to the tank 14 for measuring the density of the PV, and the valve opens. 15 installed on the pipeline supply of PV from the tank 7 to

2940

Capacity 24c With the formation of a minimum level - CHN, an alarm 25 is triggered and a signal is generated in the BUI 8, which closes valves 2 and 15 and opens valve 13. From tank 16, PV flows to tank 14, After filling it, PV, pours through wall 26 into tank 27. The signaling device 28 is triggered from the minimum level of the CW in it. According to its signal, the CID 8 interrogates the block 34 and according to a certain algorithm calculates and produces a digital indication of the value of the weight flow rate of the CN and CW reached from the well. 1 il.

a special tank 16 for collecting the PV, formed inside the separator by means of a partition 17 and the wall of the tank 7. In connection with the fact that the reservoir water contained in the NC is in two states: emulsion (in the form of water drops, In the oil medium) and free (solid), free water appears in the lower part of the tank 7 and enters the separator NJ, which through the open valve 15 enters the tank 16. In connection with a continuous inflow of the NL, its level in the tank 7 rises to form a layer of 18 PV, intermediate layer 19, consisting mainly of aggregative and kinetic stable water droplets, and a layer of 20 nN. Separating the PV from the hydrostatic pressure through the open valve 15 flows into the tank 16. With an increase in the total density of the tank 7, the PV level in the tank 16 increases, and the PV level in the tank 16 is always less than the liquid in the tank 7. After reaching The level of the liquid in the tank 7 of the upper part of the partition 21, the upper layer of the CHN, is poured into the container 22 formed between the partition; 21 and the separator wall, and begins to fill it with the PN. In the process of filling the tank 22, the liquid level in the tank 7 is stable and only rises when the tank 22 is completely filled. After reaching the liquid level of the upper part of the partition 23, the upper layer is poured into the container 24 formed between the bulkhead 23 and the wall of the separator. At the bottom of the tank 24, a level indicator 25 is installed, which is connected to the CID 8. After overflow, to form a minimum level, the CHN signaling device 25 is activated and a signal is formed at the CID 8, on the basis of which valves 2 and 15 are closed and valve 13 and PV open from the tank 16 flows into a container 14 formed inside a cylindrical vertical measuring container 5 between a partition 26 mounted inside the container 5 and the wall of the apparatus. After filling the tank 14, PV 20 ets to the top edge of the partition.

21 (h 2), the CHN is poured into the tank 24. The occurrence of the minimum level of the CHN in the tank 24 is enough to trigger the level detector 25.

through the upper edge of the partition wall 26 is poured into the container 27, in the lower part of which a level 28 alarm indicator is installed.

The corresponding piezometric pressure sensors 29-31 are installed in the lower parts of the tanks 7, 14 and 22. The height of the barriers 23 and 26 is calculated so that the levels of the NC in the vessel 7, the voltage level in the vessel 22 and the PT in the vessel 14 from the sensors are the same and equal to h. Sensor 29 is connected to the positive chamber of the differential pressure gauge 32, and sensor 30 is connected to the positive chamber.

differential meter 33. Negative chamber, - cut the upper part of the partition (h,)

Both differential pressure gauges are connected to a sensor 31. Outputs of differential pressure gauges 32 and 33 are connected to a multiplication-divider unit 34, the output of which

overflows into tank 27, with h,. The occurrence of the minimum level of PV in the tank 27 is enough to trigger the alarm

connected to the BUI In the K last level. On the developed signal45

the same signal is received from the temperature converter 35, the input of which is connected to the sensor 36, the CID 8 connects the block 34 and the converter 35 to the measurement, based on the information received from the blocks 34 and 35, the CI and CI are calculated by the specified algorithm in produced from a well connected to measurement 50

Thereafter, in the CID 8, the measurement results are displayed and the empty signal is generated from the signal, on the basis of which the valves 9-12 open and the containers 7, 14, 16, 22, 24 and 27 are emptied.

Weight flowmeter works as follows.

by blocking the signal 28, the PID 8 polls the multiplier-dividing unit 34 and then calculates and produces a digital indication of the weight flow rate of the net oil and produced water extracted from the well connected to the measurement by the following algorithm.

First, in block 34, the water content of the oil in the tank 7 (o) is determined:

55

PH P W + (1-) RChn; PIJH (Ppv - p2n); ,

JPne 9if4

(one)

(2)

PH ph gh; RPV Рп8ё1

RSC RCH «Sh. (3)

Substituting (3) in (2), get

At the beginning of the cycle, in the CID 8, a single signal (1) is closed, which closes valves 9-13, and a zero signal (O), which opens valves 2 and 15. Thus, all valves installed in the filling lines are closed and open valves mounted on drain lines. The conduit pipe 1 from the well connected to the measurement enters the tank 7 and begins to fill it | And at the same time part of the gap 18, 18 through the open valve 13 merges into the tank 14. After filling the tank 7 to the upper edge of the partition 21 (hj,) and dynamic stratification W {into components 18, 19, and 20, the level of the NC in the tank 7 rises to the upper edge of the partition

21 (h 2), the CHN is poured into the tank 24. The occurrence of the minimum level of the CHN in the tank 24 is enough to trigger the level detector 25.

the signal from the signaling device 25 in the CID 8 is generated 1, and the valves 2 and 15 are closed, and O opens the valve 13. Consequently, the flow of fluid is stopped and the

The drain from tank 16 to container 14. The time from the start of the intake to the termination of drainage of the liquid valve is fixed by the clock mechanism installed in the BUI 8. After filling the container 14 PV through the upper part of the partition (h,)

overflows into tank 27, with h,. The occurrence of the minimum level of PV in the tank 27 is enough to trigger the alarm

 level According to the developed signal

by blocking the signal 28, the PID 8 polls the multiplier-dividing unit 34 and then calculates and produces a digital indication of the weight flow rate of the net oil and produced water extracted from the well connected to the measurement by the following algorithm.

First, in block 34, the water content of the oil in the tank 7 (o) is determined:

five

PH P W + (1-) RChn; PIJH (Ppv - p2n); ,

JPne 9if4

(one)

(2)

PH ph gh; RPV Рп8ё1

RSC RCH «Sh. (3)

Substituting (3) in (2), get

(four)

 0.05 m3; V 5. (h24),)

 0,005 M J h

g h

HIS fall; piezometric height NJ, CHN and PV in capacitances 7,22 and 14 from the pressure selection point with sensors 29,30 and 31; - hydrostatic pressures generated from the liquid pump, private voltage and high voltage in tanks 7, -22 and 14.

Then, in the BUI 8, the weight output of the CN and PV is calculated using the following formulas

23

m: h

i

CHN, NZh density

  . 10 0.95 m; t ZO S; f, (30) 1.01;

the acceleration is free- f (30). 1,005; Р „860;

P „, to 1000 R PV 4100 With 1 h.

15

 n to

CHN

sing

20

25

According to the information obtained from sensors 29, 30 and 31 (Р |, „860 kg / m, Р n 1000 kg / m Р Пв 1100 kg / m on differential manometers 32 and 33 and multiplying-divider unit 34 according to the formula (4) determine the water content of the liquid in the tank 7;

L

n

- R.

- R

 0.58K

 In and

Taking this into account and the initial data, using the formulas (5) - (9), in block 8, the weight output of the CN and PV is calculated:

V

 (0.581) 0, .1

V

 1.507

H "V / 1-C /) + U"

V ,, (h

pv- V.fcU) + V ,, +

d);

V

(five)

Tchn

CHN

V lre

fne h v

fi (t); fi (t);

); (6) (7)

(eight)

thirty

CHN

24

 CHN

From „to de V

V

rt

24

w

TTne;

(9) (10)

CHN

V

40

PV

45

- respectively, the total volume occupied by the CHN and PV;

H - time of filling these volumes;

  - the volume of liquids in the respective capacity indices x; B. , hj -, are the levels of the CHN and PV from the level of 25–28 and 28 levels that are specified;

Tchn TPG share of CHN and PV; t is the temperature in the vessel 7; (t), f Xt) - correction operators

  temperature, type and coefficients of which are determined

35

done experimentally for a particular BF and PF,

and v, -: V:

V,

and V

 27

yy

And p. V, 3m; V, V

V ..

0.2 V, 0.01

m;

V

2-g 23

gz

 V2,

0.05 m3; V 5. (h24),)

0,005 M J h

23

m: h

i

0.95 m; t ZO S; f, (30) 1.01;

According to the information obtained from sensors 29, 30 and 31 (Р |, „860 kg / m, Р n 1000 kg / m Р Пв 1100 kg / m on differential manometers 32 and 33 and multiplying-divider unit 34 according to the formula (4) determine the water content of the liquid in the tank 7;

five

0

L

n

- R.

- R

 0.58K

 In and

Taking this into account and the initial data, using the formulas (5) - (9), in block 8, the weight output of the CN and PV is calculated:

V

14

 (0.581) 0, .1

V

CHN

 1.507;

Vne 1.858; 7 hours 0.8686 1.1055 t / m; G 31,42 tons / day; G PV 49.3 t / day.

 Scales of differential gauges 32 and 33 at h 1 m are:

Max YR P le - P

5,400 kg / m

min of Cheka

 h soo

MdKC PW

 ) d CHK

0

five

five

and in the known device a differential pressure gauge with a scale of 1200 kg / m is required. As can be seen, in the proposed debitometer, the scale is expanded by 3 times and, compared with the known, the sensitivity of differential pressure gauges and the measurement accuracy are increased.

The introduction of the proposed device will more accurately measure the weight flow rate of pure oil and produced water, since it automatically takes into account the water content in the intermediate layer and the change in density of produced water and oil.

Claims (1)

Invention Formula A weight flow meter containing a measuring separator, a piezometric pressure gauge of the oil liquid, valves for the filling and drain lines and a control and indication unit whose input is connected to the piezometric sensor, and the outputs for the valves of the filling and drain lines u and, in order to improve measurement accuracy, it is equipped with a tank for draining with water, three partitions, piezometric pressure sensors of formation water and pure oil, two differential pressure gauges, a multiplier-dividing unit, a signal Atomizers of reservoir water and pure oil, as well as a temperature transducer, the partitions being installed inside the separator to form a cavity. The negative chambers of both differential meters are connected to a piezometric pressure sensor of pure oil, the positive chamber of the first differential pressure gauge is connected to of the differential pressure gauge - with a piezometric pressure sensor of the reservoir water, the inputs of the multiplying-dividing block are connected to the outputs of the dkfmanometr, and its output is with the control and indication unit, the reservoir water level and clean oil alarms are connected to the inputs of the control and indication unit, the outlets of which are connected to the valves for removing the produced water from the separator to the reservoir for discharging the produced water, to the pure oil and produced water — The input of the temperature converter is connected to the temperature sensor, and the output is connected to the control and actuation unit.