The method of control oil well gushing type

 

The invention relates to the operation of wells and can be used to control oil well gushing type. The objective of the invention is to provide control over the operation at the time of starting operation and preventing failures. The well includes at least one production casing connected at its upper part with an outlet pipe for removal of extracted hydrocarbons and equipped with means to control the flow of hydrocarbons with adjustable opening. The method includes the start-up phase, consisting of early stage oil and gas production and stage of installation operating mode, followed by the operational phase. During the stage of early oil and gas production gradually open the control means to a predetermined value to establish a predetermined minimum flow rate of hydrocarbon production and compare the consumption of hydrocarbons with a predetermined threshold and, if the specified flow rate exceeds a specified threshold, cancel the opening of the controls on all the time such excess. During the installation phase operating mode, compare the flow rate of hydrocarbon production with a pre-defined is Romareda time D1, increase the opening of the controls to a predetermined value, if not, renew the comparison operation, maintain a predefined time interval for establishing a minimum flow rate of hydrocarbon production. Then compare the flow rate of hydrocarbon production threshold T2 is greater than T1, and the inlet pressure controls with a predetermined threshold P1 and, if the specified flow rate and a specified pressure at the same time consistently exceed specified thresholds over a period of time D1, complete the start-up phase, and if not, renew the comparison operation. 16 C.p. f-crystals, 2 Il.

The present invention relates to a method of control oil well gushing type, feed processing plant at the outlet of the well.

A known method of regulating the flow of production oil wells gushing type, which includes the production casing connecting the bottom hole with her mouth and is connected by means of pipe through the exhaust nozzle with adjustable opening with the installation processing of the extracted hydrocarbons, located at the outlet of the well, is to install the exhaust nozzle in a Polo is the main control for the production of hydrocarbons in the formation of the gas tube at the time of starting operation well after the opening of the outlet nozzle, and under the sequential formation of gas and liquid hydrocarbon tubes, which can occur, in particular, in wells with long drains that have a weak, negative, and uneven slopes.

The formation of these tubes interferes with the production of hydrocarbons and leads to uneven food processing units in the output well, such as separator installation for separation of liquids and gases, the recompression installation and gas installation.

Uneven food processing plants leads to the following consequences: reducing the amount of gas passing through the recompression for re-injection into the well or for sale; high-wear processing facilities; the increasing threat stops the production process, resulting in reduction of production.

Another consequence of these failures is increased wear of the connection of the reservoir-well, in particular, in the wells drilled in unconsolidated formations, which leads to the ingress of sand, requiring expensive equipment for control over the sand, to reduce well productivity or require frequent and costly restore the ins from the site of the reservoir, containing hydrocarbons in gaseous form or in water.

It is not possible effectively to compensate for losses during malfunction wells associated with unexpected features of the occurrence of the formation, or failure of equipment of the production string.

The technical result of the present invention is to eliminate the above disadvantages.

This technical result is achieved by a method of controlling oil well gushing type, comprising at least one production casing connected at its upper part with an outlet pipe for removal of extracted hydrocarbons and equipped with means to control the flow of hydrocarbons with adjustable opening, according to the invention includes the start-up phase, consisting of early stage oil and gas production, during which smoothly open the control means to a predetermined value to establish a predetermined minimum flow rate of hydrocarbon production and compare the consumption of hydrocarbons with a predetermined threshold and, if the specified flow rate exceeds a specified threshold, cancel the opening of the controls on all the time such previenien a certain threshold T1 and if the specified flow rate exceeds a specified threshold within a predetermined period of time D1, increase the opening of the controls to a predetermined value, and if not, renew the comparison operation, maintain a predefined time interval for establishing a minimum flow rate of hydrocarbon production, compare the flow rate of hydrocarbon production threshold T2 is greater than T1, and the inlet pressure controls with a predetermined threshold P1, and if the specified flow rate and a specified pressure at the same time consistently exceed specified thresholds over a period of time D1, complete the start-up phase, and if not, renew the comparison operation.

In another embodiment, the method periodically additionally calculate the derivative of the pressure at the inlet controls the flow rate of hydrocarbon production in relation to time and compare this derivative with a pre-defined negative threshold positive threshold and, if this derivative is negative pressure below a threshold or a derivative exceeds a positive threshold, cancel the opening controls the flow rate of hydrocarbon production.

Alternatively run nasut this criterion with a predetermined threshold, if the criterion exceeds a specified threshold, cancel the opening controls the flow rate of hydrocarbon production.

In another variant implementation of the present invention for the start-up phase should be operational phase, during which determine the rate of extraction and compare the rate of production with two pre-defined thresholds S1, S2, and S2 is greater than S1, and if the rate of extraction below if S1 and opening controls the flow of hydrocarbons below a predetermined threshold, increase the discovery of these controls to a predetermined value, if the rate of extraction exceeds S2, and if the opening controls the flow rate of hydrocarbon production exceeds a predefined threshold, reduce the discovery of these controls to a predetermined value, resume previous comparison operation, and comparing the flow rate of hydrocarbon production with a predetermined threshold and, if the specified flow rate below a specified threshold, close controls the flow of hydrocarbons in the predetermined time and resume the launch phase.

In another variant implementation of the present invention for the start-up phase should be exploitatio the state with two pairs of pre-defined thresholds Sa1, Sa2 and Sa1, Sb2, and Sa2 exceeds Sa1 and Sb2 exceeds Sb1 and, if Qa below Sa1, and if the Qb below Sb1, and if the opening controls the flow of hydrocarbons below a predetermined threshold, increase the discovery of these controls to a predetermined value, if Qa exceeds Sa2, and if Qb exceeds Sb2, and if the opening controls the flow rate of hydrocarbon production exceeds a predefined threshold, reduce the discovery of these controls to a predetermined value, resume previous comparison operation, and comparing Q1 and Q2, respectively, with two pre-defined thresholds S1 and S2 and, if below Q1 Q2 S1 or S2 exceeds, close controls the flow of hydrocarbons in the predetermined time and resume the launch phase.

In another variant implementation of the present invention with the aqueous extraction of liquid hydrocarbons at least one indicator of production is consumption of these carbohydrates.

According to another variant of the present invention with the aqueous extraction of liquid hydrocarbons at least one indicator of the production is the consumption of liquid hydrocarbons without water.

Another variant of this izopet what m of water.

According to another variant of the present invention at least one indicator of production is consumption, production of gaseous hydrocarbons.

According to another variant of the present invention during the operational phase additional count criterion load well and compare this criterion with a predetermined threshold, if the criterion exceeds a specified threshold, reduce the opening controls the flow of hydrocarbons to a predetermined value.

According to another variant of the present invention, the criterion for the load expected on the basis of physical quantities measured at the well.

According to another variant of the present invention controls the flow rate of hydrocarbon production include the discharge nozzle mounted on the exhaust manifold.

According to another variant of the present invention, if the operating column in its lower parts are connected by at least one Drenai for the extraction of hydrocarbons, that controls the flow of hydrocarbons include at least one deep automatic valve mounted at least one drain.

According to another variant of the present invention means is aimed at the exhaust manifold.

According to another variant of the present invention the flow rate of hydrocarbon production is measured by the flow meters installed on the exhaust manifold.

According to another variant of the present invention the flow rate of hydrocarbon production calculated on the basis of a measurement temperature of hydrocarbons in the exhaust manifold.

According to another variant of the present invention the flow rate of hydrocarbon production calculated on the basis of the pressure difference in controls flow of hydrocarbon production and the opening of these funds.

The present invention is described in more detail below with reference to the accompanying drawings, in which: Fig. 1 schematically depicts oil well gushing type, supplied from one reservoir; Fig. 2 schematically depicts oil well gushing type, which includes two operational drains, feeding from two layers.

Basically the method in accordance with the present invention is used for the management of oil and gas wells, feed processing facilities at the output of the well.

In Fig. 1 shows a production well of the fountain type for the production of liquid or gaseous hydrocarbons, vkluchaya output wells for processing the extracted hydrocarbons; exhaust manifold 4 for removal of extracted hydrocarbons, connecting the upper part of the column 2 with the processing installation 5 output well managed through the exhaust nozzle 9 with adjustable opening, which controls the flow of hydrocarbon production;
sensor 6 measuring the pressure at the outlet nozzle 9 that outputs an electronic signal corresponding to the pressure;
the sensor 7 temperature measurements at the inlet nozzle 9 that outputs an electronic signal corresponding to the temperature;
the sensor 8 measuring the pressure at the inlet nozzle 9 that outputs an electronic signal corresponding to the pressure; programmable machine 10 equipped with the input elements 13, 14 and 15, the receiving electronic signals issued respectively by the sensors 6, 7 and 8, and the output element 12, the transmitting signal control the position of the exhaust nozzle 9;
operator console 11 for the introduction of operator data in machine 10.

In addition, the machine includes not shown in Fig.1 block of memory, in which pre-loads the control program and data needed for well control, and it is all predetermined variables of the adjustment values. These danessa using the same remote.

Some of these data can be entered using the auxiliary control computer, not shown in Fig.1.

Prior to commissioning of the wells of the exhaust nozzle 9 is in the closed position.

Method of well control 1 in accordance with the present invention includes the start-up phase, consisting of two stages.

During the first stage of early oil and gas production machine 10 smoothly opens the nozzle 9 to a predetermined value, calculated in such a way as to achieve a predetermined minimum flow rate of hydrocarbon production, for example 25% of consumption, which is designed for the hole size, and compares with a predetermined threshold, for example, 150% of the minimum flow of hydrocarbons, calculated on the basis of the temperature measurement sensor 7 by using the following formula:
,
where Q is the design flow of production
Qo, and- fixed parameters wells
T is the temperature of the hydrocarbons in line 4 is measured by the sensor 7.

If the design flow exceeds a specified threshold, the machine 10 cancels the opening of the nozzle 9, holding the last value of the control signal to output USCA continues stage of installation operating mode, during which the machine 10 performs the following operations.

He compares the flow rate of hydrocarbon production, calculated as described above, on the basis of the temperature measurement sensor 7, with a predetermined threshold T1, corresponding to the minimum flow rate, for example 25% of consumption, which is designed for the dimensions of the well.

If the design flow of hydrocarbon production exceeds the threshold T1 for a predetermined period of time D1, for example for 20 min, the machine 10 outputs via the output element 12 signal the opening of the nozzle 9 to a predetermined value, for example 30% of its maximum opening.

If not, the machine 10 resumes the previous comparison operation.

When the flow rate of hydrocarbon production is almost stabilized, that is, after keeping a predetermined period of time corresponding to the time of the leaching casing 2 and the onset of the flow in the drainage area around the well, for example 60 minutes, the machine 10 compares the flow rate of hydrocarbon production, calculated on the basis of temperature measurements at the inlet nozzle 9 by the sensor 7, the threshold T2 is greater than T1, for example, 50% of the total production, which is designed well, and srawniwa design flow of hydrocarbons is greater than the threshold T2 and the pressure at the inlet nozzle 9 exceeds the threshold P1 within a predetermined period of time, for example, 20 min, the machine 10 performs operational phase.

If this double condition is not met, the machine 10 resumes the comparison operation flow of hydrocarbon production with thresholds T1 and T2.

After completion of the start-up phase method in accordance with the present invention includes the operational phase, during which the machine 10 performs the following operations:
calculates two measures of production, Qa and Qb, while Qa is the flow rate of hydrocarbon production, calculated on the basis of a measurement temperature T at the inlet nozzle 9 by using the above formula,
Qb is the flow rate of hydrocarbon production, calculated on the basis of the differential pressure in the nozzle 9 by using the following formula:

if pout>0,5Rvh
and
Q=kRvh0,707S if pout<0,5Rvh,
where
Q is the design flow of production
k is a constant
S - flow section of the nozzle 9,
Rvh and pout, respectively, the values of pressure at the inlet and outlet nozzles 9, measured respectively by the sensors 8 and 6;
compares the performance of Qa and Qb, respectively, with the two then the market well, for example:
ST1=75% of the consumption of hydrocarbons, which is designed for the hole size,
ST2=90% consumption of hydrocarbons, which is designed for the hole size,
SP1=80% of the consumption of hydrocarbons, which is designed for the hole size,
SP2=110% of the consumption of hydrocarbons, which is designed for the dimensions of the well.

If Qa below ST1 and Qb below SP1 and if the opening of the nozzle 9 is below the threshold, a predetermined depending on the parameters of a well, for example 60% of the maximum opening, the machine 10 increases the opening of the nozzle 9 to a predetermined value, for example 3% of the maximum opening.

If Qa exceeds ST2 and if Qb exceeds SP2 and if the opening of the nozzle 9 is greater than the threshold, a predefined depending on the parameters of a well, for example 30% of the maximum opening, the machine 10 reduces the opening of the nozzle 9 to a predetermined value, for example 3% of the maximum opening.

If not, the machine 10 will resume the previous operation.

Parallel machine 10 compares Qa and Qb, respectively, with two pre-defined thresholds S1 and S2, while S1 is equal to 25% of the consumption of hydrocarbons, which is designed for the dimensions of the wells, and S2 is equal to 40% of the same flow, and if below Q1 Q2 S1 or S2 exceeds, the machine 10 resumes the phase C is in the pipeline 4 at the inlet nozzle 9, comparing the derivative of the pressure with respect to time, for example 1 bar per minute, with a negative threshold, for example 1 bar for five minutes, and if the derivative of the pressure is not in the range between two specified thresholds, the machine 10 cancels the opening of the nozzle 9.

During these two phases he also expects criteria load well on the basis of the physical quantity measured at the well, for example the pressure in the bottom hole, measured using a sensor, not shown in Fig.1, using the following formula:
With=and(Rstat-R),
where
With the criterion of load,
and is a constant
Rstat - static pressure at the well bottom, i.e. the pressure in the bottom hole in the absence of consumption of hydrocarbons,
P is the pressure at the bottom of a well during production.

The machine 10 C compares with a threshold that is predetermined depending on the parameters of the mechanical resistance of the layer and, if this threshold is exceeded, it generates a signal for closing the exhaust nozzle 9, for example, 5% of its maximum opening.

As criteria load wells may be used for other physical quantities, such as flow of sand, if it is contained in the hydrocarbons, the pressure in the temperature at one point wells or mechanical value on the equipment well.

Due to the modulation of the position of the exhaust nozzle according to the method in accordance with the present invention, the first gas tube and the first liquid stopper arising during the start-up phase, significantly attenuated, and production gradually and steadily growing, and then supported in a stable mode at the level desired.

By monitoring the rate of change of pressure in the exhaust manifold and the magnitude of the loading criteria reduces the risk of damage to the well.

The above-described method of controlling oil and gas well in accordance with the present invention is not limited to this type of well, it can also be used when making some design changes available to the person skilled in the art, to control the other the following types of wells:
"mnogogreshnova well in which production casing is fed by a number of drains passing through one or more layers;
the type of well, shown in Fig.2, which includes two reservoir section 21 and 22 separated from each other by the gasket 23, and automatic valve 20 controlled by the machine 10 and allowing to modulate the performance of the reservoir 21 when the extraction is the fact that well the fountain type, includes at least one production casing connected at its upper part with an outlet pipe for removal of extracted hydrocarbons and equipped with means to control the flow of hydrocarbons with adjustable opening, characterized in that it includes the start-up phase, consisting of early stage oil and gas production, during which smoothly open the control means to a predetermined value to establish a predetermined minimum flow rate of hydrocarbon production and compare the consumption of hydrocarbons with a predetermined threshold and, if the specified flow rate exceeds a specified threshold, cancel the opening of the controls on all the time such excess, and stage of installation operating mode, during which compare the flow rate of hydrocarbon production with a predetermined threshold T1 and, if the specified flow rate exceeds a specified threshold within a predetermined period of time D1, increase the opening of the controls to a predetermined value, and if not, renew the comparison operation, maintain a predefined time interval for establishing a minimum flow rate of hydrocarbon production, a pre-defined threshold P1 and if the specified flow rate and a specified pressure at the same time consistently exceed specified thresholds over a period of time D1, complete the start-up phase, and if not, renew the comparison operation.

2. The method according to p. 1, characterized in that it further periodically calculate the derivative of the pressure at the inlet controls the flow rate of hydrocarbon production in relation to time and compare the specified view with a pre-defined negative threshold positive threshold and, if the derivative of the pressure below a negative threshold or if the derivative exceeds a positive threshold, cancel the opening controls the flow rate of hydrocarbon production.

3. The method according to p. 1 or 2, characterized in that during the start-up phase an additional count criterion load well and compare this criterion with a predetermined threshold, if this criterion exceeds a specified threshold, cancel the opening controls the flow rate of hydrocarbon production.

4. The method according to any of paragraphs.1-3, characterized in that after the start-up phase should be operational phase, during which determine the rate of extraction and compare the rate of production with two pre-defined Borovichi hydrocarbons below a predetermined threshold, increase the discovery of these controls to a predetermined value, if the rate of extraction exceeds S2, and if the opening controls the flow rate of hydrocarbon production exceeds a predefined threshold, reduce the discovery of these controls to a predetermined value, renew the previous comparison operation, and comparing the flow rate of hydrocarbon production with a predetermined threshold and, if the specified flow rate below a specified threshold, close controls the flow of hydrocarbons in the predetermined time and resume the launch phase.

5. The method according to any of paragraphs.1-3, characterized in that after the start-up phase should be operational phase, during which calculate two measures of production, Qa and Qb, compare these two values Qa and Qb respectively with two pairs of pre-defined thresholds Sa1, Sa2 and Sb1, Sb2, and Sa2 exceeds Sa1 and Sb2 exceeds Sb1 and, if Qa below Sa1, and if the Qb below Sb1, and if the opening controls the flow of hydrocarbons below a predetermined threshold, increase the discovery of these controls to a predetermined value, if Qa exceeds Sa2, and if Qb exceeds Sb2, and if the opening means of uprest control to a predetermined value, resume previous comparison operation, and comparing Q1 and Q2, respectively, with two pre-defined thresholds S1 and S2 and, if below Q1 Q2 S1 or S2 exceeds, close controls the flow of hydrocarbons in the predetermined time and resume the launch phase.

6. The method according to p. 4 or 5, wherein, if the extracted liquid hydrocarbons containing water, at least one indicator of production is consumption of these carbohydrates.

7. The method according to p. 4 or 5, wherein, if the extracted liquid hydrocarbons containing water, at least one indicator of production is consumption of these hydrocarbons without water.

8. The method according to p. 4 or 5, wherein, if the extracted hydrocarbons containing water, at least one indicator of production is consumption.

9. The method according to p. 4 or 5, characterized in that at least one indicator of the production is the consumption of the produced gaseous hydrocarbons.

10. The method according to any of paragraphs.4-9, characterized in that during the operational phase additional count criterion load well, compare this criterion with a predetermined threshold, if the criterion exceeds this threshold, the smart the persons under item 3 or 9, characterized in that the test load is calculated on the basis of the physical quantity measured at the well.

12. The method according to any of the p. 1-11, characterized in that controls the flow rate of hydrocarbon production include the discharge nozzle mounted on the exhaust manifold.

13. The method according to any of the p. 1-11, characterized in that, when operating the column in its lower parts are connected by at least one Drenai for the extraction of hydrocarbons controls the flow of hydrocarbons include at least one deep automatic valve mounted at least one drain.

14. The method according to p. 13, characterized in that controls the flow rate of hydrocarbon production include the discharge nozzle mounted on the exhaust manifold.

15. The method according to any of paragraphs.1-14, characterized in that the flow rate of hydrocarbon production is measured by the flow meters installed on the exhaust manifold.

16. The method according to any of paragraphs.1-14, characterized in that the flow rate of hydrocarbon production calculated on the basis of the temperature measurement of the extracted hydrocarbons in the exhaust manifold.

17. The method according to any of PAH control the flow rate of hydrocarbon production and the opening of these funds.

 

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