RU724U1 - Device for oil production and utilization of associated products (water and gas) - Google Patents

Abstract

1. A device for oil production and utilization of associated products (water and gas), including pipelines, communicating through the ejectors, separators and pipe columns producing and injection wells, characterized in that it is equipped with a second liquid-gas ejector, and the discharge of the producing well communicated by the pipeline with a high-pressure (active) nozzle of the first liquid-gas ejector, and a discharge oil pipe of the inlet liquid-gas separator is connected by a pipeline with a high-pressure (active) nozzle of the second liquid-gas th ezhektora.2. The device according to claim 1, characterized in that it is equipped with gas and deep liquid-gas ejectors, the discharge gas pipe of the inlet liquid-gas separator communicated through a locking device and a pipe with a low pressure chamber of the gas ejector, the high-pressure (active) nozzle of which is indicated by the pipe with a source of high pressure gas, and the outflow of the gas ejector is communicated through shut-off devices and pipelines with the annular (annular) space of the liquid-gas injection well communicated with a low-pressure chamber of a deep liquid-gas ejector installed in a central column of elevator pipes of a liquid-gas injection well.

Description

ikya.

Device for oil production and utilization of associated products (water and gas)

The technical field to which the utility model belongs.

This utility model relates to the oil industry, and can be used in the development of oil and gas deposits, including the injection of displacing agents (water, gas, gas mixture) into the reservoir.

Known pump-ejector installation (1492097, class 4F04F 5/54), which can be used in the process of oil production for utilization of associated products (water, gas). The installation consists of three separators, a pump, a liquid-gas ejector connected by pipelines. installation, the product is divided into its phases (oil, water, gas) The associated water separated from oil is supplied to the pump, and from it one part of the water flow goes to the injection well, and the second part to the active nozzle of the liquid-gas projector of, rds passive medium supply side which soobscher pg ya99 the input separable. a radiator, and the output is from the liquid-gas Sevar c. which gas is separated from the liquid (water) and the kami of this installation are: firstly. ONLY the fluid received at the reception of the pump. .- ;: newer sequentially separators, and the liquid (associated water) from the third (liquid-gas) separator is not disposed of; secondly, that the utilization of the gas leaving the liquid-gas separator is not solved in the absence of an external consumer or when the pressure on the gas from the liquid-gas separator is lower than that necessary for supplying gas to the consumer’s gas pipeline A technical solution is known (application for invention mt fi; 1 N. /,, h, “rcjT 1 for three hedgehogs 1 P0 that is disposed of i ..;, 5 ... j .. ..., f

 92002120 FROM 10.26.92 A method for developing oil recovery), to utilize more efficiently utilize water separated from oil and gas from all separators, as well as all associated petroleum gas “which can be supplied either to an external consumer or sent for injection into an oil (oil and gas) reservoir. This is ensured due to the alignment of the pipelines of the pipeline S1U01 of gas-liquid ducts with separators, the discharge pipes of water and gas of which are communicated by pipelines with injection wells. The disadvantage of this technical solution is that for cos Denmark the required pressure of the liquid (water) supplied to the active nozzle of the ejectors, pumps are used that require the costs of the essence of the utility model.

the purpose of the utility model is to reduce capital costs and energy during the disposal of associated products (water and gas) in the process of oil production "

The achievement of this technical result is ensured by the fact that for the injection of low-pressure associated petroleum gas, the shergia of the flow of all products extracted from the well is used, as well as the energy of the oil flow coming from the inlet liquid gas

parator in the first stage of separation (razgazirovashzya.neft) This allows to exclude the need to use

BONES on an active nozzle of liquid-gas injectors as a result of which. is the saving of capital costs and costs1 spent on; giving fluids by pumps. . :. -h

According to a utility model, a production well spill is connected by a pipe with a high-pressure (active) nozzle of the first liquid-gas ejector, a discharge oil pipe of the inlet liquid-gas separator is connected by a pipeline with a high-pressure (active) nozzle of the second liquid-gas ejector;

 h U

. f - .;

gas pipeline ejector is connected via a locking device to the pipeline and the annular (annular) space of the liquid-gas injection squeegee with a low-pressure chamber of the liquid gas ejector installed in the central column of the lift pipes.

Unlike the prototype, in the proposed utility model, the products extracted from the reservoir are not divided into phases (oil, water, gas) in front of the first liquid-gas ejector, but are completely fed to the active nozzle of the first Rigid-gas injector (the produced products first enter the prototype into the inlet separator, where it is divided into oil, water and gas, while the oil is sent to the consumer, and its stream is not used for utilization of associated water and associated petroleum gas) “In the proposed utility model, tsya total energy flow produced from the production wells (oil, gas, water), t "k. the entire nozzle of the first gas-bone gas injector installed at the beginning of the technological chain is fed to the active nozzle, until its separation into hotel phases

This allows for a sufficient supply of reservoir energy of the developed oil (oil and gas) field to dispense with the installation of pumps for supplying liquid to the liquid-gas ejectors, that is, in this utility model, the issues of utilization of not only associated water and gas, but also excess formation energy, are solved. which is not provided for in the prototype, in addition, in the proposed utility model, a deeper gas degassing is carried out, which allows it to be supplied to the consumer with a higher content of dissolved gas, and additional ADDITIONAL evolved gas recycle, using the excess estestvennuyuS Plast) Sherge

Thus, this useful corn provides one week and a half of technical results saving material resources (pumping station is excluded) and energy costs.

-6 Utilization of additional volumes of associated petroleum gas (for offsetting deeper oil degassing).

List of drawings

The implementation scheme of the utility model, the location of its elements and the connection of the niche niche are presented in the drawings (Fig. 1-2). The corresponding elements of the circuits shown in the drawings include; oil production well I, pipeline 2 first liquid-gas injector 3, pipeline 4, separator (oil degassing tank) of the first stage 5, pipeline 6, inlet liquid-gas separator 7, pipeline 8, second liquid-gas ejector 9, pipeline 10, separator (oil degassing capacity) of the second stage II, pipelines 12.13, water injection well 14, shut-off device 15, pipeline 16, gas injection well 17, pipelines 18.19, shut-off device 20, pipeline 21, shut-off device 22, pipeline 23,24,25, shut-off device 26, gas ejector 27, pipelines 28,29, shut-off device 30, first (central) column of lift pipes 31, second column of lift pipes 32, injection liquid-gas well 33, deep liquid-gas ejector 34 locking device 35, production (casing) pipe string 36, oil, gas (gas condensate) or water reservoir 37, packer 38.

Information confirming the feasibility of implementing a utility model

j. The discharge of the oil producing well I (Fig. 1) is connected by a pipe 2 with a high-pressure (active) nozzle of the first liquid-gas ejector 3, the low-pressure chamber of which is connected by a pipe 4 with a discharge gas pipe of the separator C or oil degassing tank) of the first stage 5, and the output nepiBoro of the liquid-gas vzector 3 is connected by a pipe 6 with an inlet liquid-gas separator 7, a discharge oil pipe of which is connected by a pipe 8 with a high-pressure (active) nozzle of the second yard-gas-gas ejector 9 kame the low pressure of the second ejector is connected by a pipeline 10 with a discharge gas pipe of the separator (oil degassing tank) of the second stage II, and the output of the second low-pressure gas ejector 9 is connected by a pipe 12 with the inlet pipe of the separator (oil degassing tank) of the first stage 5; the discharge water pipe of the inlet liquid-gas separator 7 is connected by a pipe 13 to the water injection well 14, the gas discharge pipe of the inlet gas-separator 7 is connected through the shut-off device 15 and the pipe 16 with the gas injection well 17; the discharge oil pipe of the separator (oil degassing tank) of the first stage 5 is connected by a pipe 18 with the inlet pipe of the separator (oil gas degassing tank) of the second stage II, and the discharge oil pipe of the separator (oil gas degassing tank) of the second stage II is connected to the oil consumer by pipeline 19, in addition inlet gas-gas separator 7 is communicated through a shut-off device 20 with a gas consumer through a pipe 21 and through a shut-off device 22 with a pipe 23 of a reservoir pressure maintenance system (1 Щ) Р device bot (FIG. 1) “Production (oil, gas, water) from the oil producing well I and through pipeline 2 is supplied to the active nozzle of the first liquid ejected gas ejector 3 and through pipeline 4 into the low-pressure chamber of the first liquid-gas ejector 3 gas from a separator (oil degassing tank) of the first stage 5 | from the first liquid-gas ejector 3 through the pipeline 6 gas-liquid, the mixture enters the inlet liquid-gas separator 7, which is divided into gas, oil and water; the oil that has been introduced here with the gas dissolved in it remaining through line 8 enters the active nozzle of the second liquid-gas ejector 9, into the low-pressure chamber of which the gas released in line 10 ceir & paT € | e (the essence of oil decomposition) of the second stage II; coming out of the second liquid-gas ejector 9 Gas-b

the liquid mixture through line 12 enters the separator (oil degassing tank) of the first stage 5; oil from the separator (oil degassing capacity) of the first stage 5 through pipeline 18 enters the separator (oil degassing capacity) of the second stage II, from where oil with low pressure (0.3 0.5 Sha) is supplied through the pipeline 19 to the consumer; water leaving the second gas-gas separator 7, through a pipe 13 is supplied to a water injection well 14 or through a shut-off device 22 into a pipe 23 of a reservoir pressure maintenance system (PGS); the gas leaving the “fluid-gas separator 7 through the shut-off device 15 and the pipe 16 is supplied to the gas injection well 17 and (or) through the shut-off device 20 and the pipe 21 to the consumer.

This technical solution allows to utilize low-pressure associated petroleum gas due to the excess energy of the produced products.

2, The gas outlet pipe of the inlet low-gas separator 7 is connected via pipelines and the shut-off device 26 to the low pressure chamber of the gas injector .27, the active nozzle of which is connected by pipeline 2S to a high-pressure gas source (for example, a gas well), the output of the gas injector 27 through pipelines 16.29, locking devices and an annular (annular) formed between the first (central) column of elevator pipes 31 and the second COLUMN elevator pipes 32, lowered into the injection liquid-gas well 33, soo (e n with a low-pressure chamber of a deep liquid-gas ejector 34 installed in a niche of the first (central) column of elevator pipes 31, the active nozzle of which is communicated through the internal cavity of the first (central) column of elevator pipes 31, pipe 13 and shut-off devices and with - one branch pipe of the inlet liquid-gas separator 7 and (ii) the pipe 24 of the reservoir pressure support system; the discharge of the deep liquid-gas gas supply unit 34 is communicated through perforations in the operating room (casing noy) pipe string 36 with oil.

nweTParicrfeO,

Use (gas condensate) or water reservoir 37, the annular space of the mead by the second column of elevator pipes 32, and the production (casing) column of pipes 36 is disconnected by the packer 38.

The operation of the device (figure 2). The gas leaving the inlet gas separator 7 through the pipe 24, the shut-off device 26 and the pipe 25 enters the low-pressure chamber of the gas ejector 27, to the active nozzle of which the high-pressure gas is supplied through the pipe 28} forming a mixture of gases with a higher pressure in the gas ejector 27 than the pressure of the low-pressure gas entering it, leaving the ejector, through pipeline 29, through shut-off devices 30 4 15 and pipeline 16 is directed into the annular space of the mead of the first (central) 31 and second 32 columns we lift pipes, lowered into the injection liquid-gas well 33, passing through which down, enters the low pressure chamber of the deep liquid-gas ejector 34, the active nozzle of which enters through the internal cavity of the first (central) number of lift pipes 31, pipeline 13 and a shut-off device 35 water from the inlet liquid-gas separator 7, or through a shut-off device 22 from a pipeline 23 connected to the PS system. The gas-liquid mixture formed in the deep liquid-gas ejector 34 is directed through the perforations in the production (casing) string 36 to an oil, gas (gas condensate) or water raft 37; the production (casing) string 36 above the installation location of the deep liquid gas ejector 34 is protected by the packer 38 from possible pressure fluctuations and contact with the medium exiting the deep liquid gas ejector 34.

Due to the supply of low-pressure gas leaving the inlet liquid-gas separator 7 / to the gas ejector 27, the pressure of the gas entering the annular space of the avidity-gas well and then into the low-pressure chamber of the deep liquid 10 increases

a bone-gas ejector 34 as a result of which the ejection coefficient is detected, i.e., to ensure an increase in the volume of low-pressure gas utilized in an oil, gas (gas condensate) or water reservoir.

Utility Model Examples

Example I (Fig. I), the oil reservoir lies at a depth of 2800 m, the reservoir pressure is 29 Sha, the gas saturation pressure of gas is 17 Sha, the gas content of reservoir oil 170 Based on the study of the oil well, the wellhead pressure in front of the nozzle P is dependent on the oil flow rate a, a graph of dependence () is presented in “rg. 3. At oil production

and at 100 t / d, wellhead pressure is R. 8.9 Sha, inlet pressure

of products at the oil separation and degassing site is Ррт 8.4 MPa, with this pressure, the produced products are delivered to the high-pressure (active) nozzle of the first acid-gas ejector 3, while at the outlet of this ejector a pressure of 2 MPa is maintained. Low-pressure pressure gas entering

from the separator (oil degassing tank) of the stage, the low-pressure chamber of the injector is adopted at 0.8 Sha (at the same pressure, oil is degassed in the first stage) Shoe conductor Sho In the first liquid-gas ejector 3, the high-pressure products entering its active nozzle expand at the outlet of the nozzle from to 0 , 8 Sha, with the additional content of associated gas escaping from the oil in the area from the reservoir Until the ejector leaves the active nozzle, it is

V, - - (and J - ™ (17 -0.8) 162.

(in the future, due to compression of the air during its passage through the ejector, the pressure on the top of / from the first liquid-gas ejector increases to the value of Sha, and part of the gas back

Ah .JL f

soluble in oil). The gas saturation of the oil leaving the inlet liquid-gas separator 7 is

 -I2Qx2 20MVT;

With such values of pressure and gas saturation, oil enters the active nozzle of the second liquid-gas sector 9 (pressure at the inlet of the active nozzle of this ejector Ppg PQJ 2.0 MPa), low-pressure associated gas is supplied to the low-pressure chamber of this ejector from the separator (oil degassing tanks ) of the second stage II on the pressure Pg2 Ш1а (this pressure is maintained in the second stage of oil degassing) When the oil leaving the active nozzle of the gas-ejector ejector 9 is expanded, 0 Ша to Ша from I t of oil, a solution is released volume of gas

4- - (Рр - / aj - (2.0 - 0.45) 15.5 MVl -4 Since both the first and second liquid-gas ejectors, the gas flow prevails at the exit of the active nozzle (in the first ejector 162, and in the second 15.5 m® per I t of oil), then in this case it is permissible to use the available experimental data obtained in the study of the operation of gas ejectors when calculating the operation mode of ejectors, for which, based on the materials cited in the work of Mr. G. Bulychev, the use of ejection during operation of oil and gas wells, M, Nedra, 1989, (pages "45-47, table" 2), construction oen graph of dependence () Figure 4, where

P is the degree of expansion of the high-pressure flow,

- the compression ratio of the low pressure stream,

C. - coefficient of ejection;

p.A. .-. and - nozzle, in the low conch chamber and at the exit of the ejector;

  volumetric flow rate, respectively, of low-pressure and high-pressure gas entering the ejector

At the outlet of the second liquid-gas injector, the pressure Sha is maintained (the same pressure is maintained in the first stage of oil degassing), in the second stage of oil degassing, the pressure is maintained. The gas released in the second stage of gas degassing is equal to

 - / - / l J (0.8-0.45) 3.5: must be returned back with a second liquid-gas

Ashktora / in the tank of the first stage of degassing, and associated gas from the second stage and gas released in the first stage of gas degassing, in a volume of at least t, equal to:

/ - V V - if //) + I2Q (2.0-0.8) "15.5.

p3I ff i jLJ7 should return with the help of the first gas-liquid gas sector

in the inlet liquid gas separator 7. To ensure the above conditions, the coefficients of adjection should be (not less): in the first liquid-gas injector

/ y "JS45 .V 0.1;

t, f. ,, r - lK-v (f,, 162 in the second liquid-gas lecturer

O-bLV

 0.23-; Vz C 15.5

We find the calculated values of P and:

for the first liquid gas ejector

3.

v. 5 5

/ 0.8 FOR the second WPC gas-gas actor

i --- 2 "-.45; /: r4 M" i

 gi 0.45 v 0.45

The calculated values plotted on the graph (asterisks 6 and 7 are shown), the dependences Pa / (0 “Fig. 4, are located near curve I, for which the value is“ 0.2, and for the first liquid-gas ejector there is a margin of productivity for low-pressure gas .

As can be seen from the above example, all associated petroleum gas released in the first and second separators (oil degassing tanks) is compressed in the first liquid-gas ejector to a pressure of 2.0 MPa and sent to the inlet liquid-gas separator, from where it is fed through a pipeline to discharge gas fermentation and other consumers with the same pressure. The water released from the produced product in the inlet low-pressure gas separator is also directed through the pipeline to the water injection well or to the reservoir pressure support system, in this case, due to the fact that the pressure of the water and gas leaving the inwardly low-pressure gas separator is not high ( equal to 2.0 Sha), this by-product is sent to reservoirs with reduced reservoir pressure, which lies at a shallow depth. Recycling of by-products does not require expensive facilities (pumping and compressor units), and additional energy costs are not required.

Example 2. (figure 2). Under conditions similar to those described above, in example I, it is necessary to supply a gas-liquid mixture formed from by-products (oil gas and water) extracted with oil. 1% ubin of occurrence of absorbance1 about the formation 500m, reservoir pressure 3 Sha, sub-yf is required at the bottom of the injection liquid-gas well

keep pressure equal to 4.5 MPa.

To do this, two concentric columns of elevator pipes are lowered into the injection borehole gas well; in the lower part of the first (central) column of elevator pipes, a deep liquid-gas ejector is installed to seal the annular space between the outer walls of the first (central) column of elevator pipes (below the inlet low pressure chamber of a deep liquid-gas ejector), and the space of the meadu is the outer wall of the second column of elevator pipes and casing (operational) count The outlet of the installation site of the deep liquid-gas ejector is blocked by a packer. The internal cavity of the first (central) column of elevator pipes is communicated through shut-off devices and a pipeline with a flip-out spigot nozzle of the inlet liquid-gas separator, and the annular space formed by the sewing walls of the first (central) and second column of elevator pipes is communicated through shut-off devices and a pipeline with a gas outlet an ejector, the low-pressure chamber of which is connected by pipes (with a wire @ a gas discharge pipe of the inlet Zh1-gas-gas separator; an active nozzle of a gas ejector of the pipelines must be used depending on the high pressure source CID calculations

The pressure of the water flow entering the nozzle of the deep liquid-gas ejector, () is calculated by the formula

-R.R.R; at (I)

 ё d)

and the pressure of the gas flow entering the low pressure cakura of the deep liquid-gas ejector (Fpg) according to the RG formula, (P, r

 4 ; The second P-p j 5G “R t-R SG 6G 7“ 2 t:, p ... respectively the pressure of water and gas at the mouth of the injection water-well; acceleration of gravity, 9.81 DENSITY of water, Jg w 1000 kg / m; installation depth of a deep liquid-gas injector. At 500 m; coefficient of hydraulic resistance of the first (central) column of elevator pipes, OO, Oy; 14 ; the inner diameter of the first (central) column of elevator pipes 0.05 m; the flow rate of water fed to the active nozzle of the deep liquid-gas ejector, the gas flow rate. (under standard conditions) of a deep “liquid-gas ejector, st m® / s; the density of the gas supplied to the deep ejector under standard conditions, J.- “0.8 kg / m; respectively, temperature and pressure under standard conditions, T, K, P, "0.1 MPa; gas temperature, borehole average, T rvZOZ K; gas compressibility coefficient, average value over the wellbore, 2; coefficient of hydraulic resistance of the annular space, L 0.03; the inner diameter of the second column of elevator pipes, "0,089 m; the outer diameter of the first (central) lift column is -f 6 gO 3 o

1rya no development of gas and gas condensate well foams, Shn Gazprom USSR, SevKavNShGaz, Stavropol, 1977 publishing house: Book printing house of the publishing, printing and book trade department of the Council of Ministers of the Soviet Union of Socialist Republics, 40 p. U, I (3)

where / -4 is the volumetric coefficient of ejection

- &. %

() о 5 volumetric gas flow reduced to the conditions at the outlet of the deep “idcostnd gas ejector, m® / s;

/ is the pressure of the water-gas mixture at the outlet of the deep “fluid-gas gas stream, P“ “R., 5 Sha.

the method of successive approximations is applied. First, ws (we take some values of Q and 0, and for © these values we determine

According to formulas (I) and (2), Pj, jj, and according to formula (3), and, Then Q and Q values are specified in accordance with the calculated value, and new p values are calculated using updated Q and Q. and P ,, the calculation continues until satisfactory convergence of the results is obtained.

Two options are considered:

The 1st option is the supply of water to a yad-injection well with a flow rate MVeyT "0.00116 MVc at the wellhead pressure: water Pjg" 1.8 MPa and low-pressure gas Pjj, -I, 8 Ша.

Option 2 - a low-pressure gas with a pressure of 1.8 MPa is first supplied to the gas ejector, where due to ejection, the pressure

gas rises to R. “at 4.15 Sha (high-pressure gas is supplied to the active nozzle of the gas ejector at a pressure of 18 Sha, while the coefficient of ejection of the gas ejector is 0.2). The flow rate and pressure of the water are the same as in the 1st embodiment.

- / f / tf

-, / l /.

as a result of the calculations obtained:

in the 1st embodiment (without installation on the mouth of the gas ejector)

the ejection coefficient of the deep liquid-gas ejector is 0.1;

the flow rate of low-pressure gas injected into the reservoir is 986 m / day;

(low-pressure gas pressure at the same time at the entrance to the low

the pressure of the deep sichid-gas ejector P 1.9 Sha, and the water pressure at the inlet to the active nozzle of this ejector, 4 MPa)

in the 2nd embodiment (with installation on the surface of the gas ejector, in accordance with the claimed utility model): the ejection coefficient of the deep liquid-gas ejector is 1.77; the flow rate of the mixture of gases injected into the reservoir is 8200, while the proportion

the low-pressure gas in this flow rate is (for g; the coefficient, z. the ejection coefficient is a surface gas ejector).

In the 3rd variant, the flow rate of the low-pressure associated gas supplied to the formation for utilization is 1360, i.e. 374 MVoyT more than in the first embodiment (at the same time, the pressure at the outlet of the gas eductor is 4.15 Sha, with the same pressure at the wellhead, the gas post-heats into the annular space of the injection liquid-gas well; in the low-pressure chamber of the deep liquid gas ejector pressure, 3 Sha, and water pressure at the inlet to the active nozzle

this ejector is 6.4 Sha),

- / I / y- / 4

Author Shevchenko Alexander Konstantinovich

Ao.isch

Claims (2)

1. A device for oil production and utilization of associated products (water and gas), including pipelines, communicating through the ejectors, separators and pipe columns producing and injection wells, characterized in that it is equipped with a second liquid-gas ejector, and the discharge of the producing well communicated by the pipeline with a high-pressure (active) nozzle of the first liquid-gas ejector, and a discharge oil pipe of the inlet liquid-gas separator is connected by a pipeline with a high-pressure (active) nozzle of the second liquid-gas th ejector. 2. The device according to p. 1, characterized in that it is equipped with a gas and deep liquid-gas ejectors, and the discharge gas pipe of the inlet liquid-gas separator is communicated through a locking device and a pipeline with a low pressure chamber of the gas ejector, a high-pressure (active) nozzle of which reported by a pipeline with a high-pressure gas source, and the discharge of the gas ejector is communicated through shut-off devices and pipelines with an annular (annular) space of a liquid-gas injection well, communicated m with the low pressure chamber of deep liquid-gas ejector, installed in the central column of tubings liquid and gas injection wells.