CN111075400A - Inter-well gas lift intelligent gas injection method and system - Google Patents
Inter-well gas lift intelligent gas injection method and system Download PDFInfo
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- CN111075400A CN111075400A CN201811215229.1A CN201811215229A CN111075400A CN 111075400 A CN111075400 A CN 111075400A CN 201811215229 A CN201811215229 A CN 201811215229A CN 111075400 A CN111075400 A CN 111075400A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000002347 injection Methods 0.000 title claims abstract description 51
- 239000007924 injection Substances 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 118
- 238000009825 accumulation Methods 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims description 14
- 230000004913 activation Effects 0.000 claims description 11
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 206010063385 Intellectualisation Diseases 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 188
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/162—Injecting fluid from longitudinally spaced locations in injection well
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Abstract
An intelligent gas lift gas injection method between wells, which comprises the following steps: acquiring an annular liquid level of an oil-gas well; secondly, calculating the wellbore liquid accumulation of the oil-gas well according to the annular liquid level, the casing pressure of the oil-gas well and the oil pressure; and step three, comparing the accumulated liquid volume of the shaft with a preset accumulated liquid volume threshold interval, and starting or finishing the gas lift between the wells according to a comparison result. The method can automatically determine whether the oil and gas well needs gas injection and gas lifting opportunity according to the shaft effusion condition of the oil and gas well, so that the intellectualization of gas lifting between wells can be realized, the liquid drainage effect and the liquid drainage efficiency are improved, and the energy is saved.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration and development, in particular to an intelligent gas injection method and system for an interwell gas lift.
Background
After the production of the water producing gas well enters the middle and later stages, liquid accumulation at the bottom of the well can be caused due to insufficient stratum energy, so that flooding and production stopping are caused, and at the moment, a water drainage and gas production process must be implemented to maintain stable production. The gas lift process between wells is a water drainage gas production process which utilizes a nearby high-pressure gas well to inject gas into the oil sleeve annulus of a low-pressure gas well and continuously takes out accumulated liquid at the bottom of the well through high-pressure airflow so as to recover the normal production of the low-pressure gas well. Compared with tank car gas lift, vehicle-mounted gas lift, membrane nitrogen gas lift and plunger gas lift, the process is convenient, simple, safe and economical to construct, and is widely applied to cluster well groups with high-pressure wells, low-pressure wells and weak injection wells coexisting at present.
The patent application with the publication number of CN102373906A provides a continuous gas lift drainage gas production method and a continuous gas lift drainage gas production device between high-pressure gas source wells, which use an alcohol injection pipeline as a gas injection pipeline, are convenient to transform and have low cost, and the patent application with the publication number of CN206091948U provides a mobile gas lift device between wells, which is convenient to disassemble and assemble and widens the well selection range of a gas source well. However, for the existing methods, the gas lift between wells still adopts a manual operation mode, which wastes time and labor, and the gas lift is inaccurate in timing, thereby affecting the liquid drainage effect.
Disclosure of Invention
In order to solve the problems, the invention provides an intelligent gas lift gas injection method between wells, which comprises the following steps:
acquiring an annular liquid level of an oil-gas well;
secondly, calculating the wellbore liquid accumulation of the oil-gas well according to the annular liquid level, the casing pressure of the oil-gas well and the oil pressure;
and step three, comparing the accumulated liquid volume of the shaft with a preset accumulated liquid volume threshold interval, and starting or finishing gas lift between wells according to a comparison result.
According to one embodiment of the invention, in the first step, the annular liquid level is measured by using an echometer arranged on one side of a plunger gas lift wellhead casing pressure meter.
According to an embodiment of the present invention, in the step two, the periodic liquid discharge amount is calculated according to the following expression:
wherein Q isLRepresents the well bore liquid volume, H represents the depth under the oil pipe, L represents the annular liquid level, pcAnd ptRespectively representing the casing pressure and oil pressure, Dti、DtoAnd DciRespectively showing the inner diameter of the oil pipe, the outer diameter of the oil pipe and the inner diameter of the casing pipe.
According to an embodiment of the invention, in said step three,
if the well bore liquid accumulation amount is larger than the maximum value of the preset liquid accumulation amount threshold interval, generating a first electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between a gas source well and a gas-lifted well by utilizing the first electromagnetic valve control signal, and starting gas-lifted between wells;
and if the accumulated liquid volume of the shaft is smaller than the minimum value of the preset accumulated liquid volume threshold interval, generating a second electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas-lifted well by utilizing the second electromagnetic valve control signal, thereby finishing gas lifting between the wells.
According to an embodiment of the invention, in the third step, the minimum starting pressure is also determined according to the accumulated fluid volume of the well,
and comparing the well bore liquid accumulation amount with a preset liquid accumulation amount threshold interval, comparing the acquired gas source well pressure with the minimum starting pressure, and starting or finishing the gas lift between the wells according to a comparison result.
According to an embodiment of the invention, in said step three,
and if the well bore liquid accumulation amount is larger than the maximum value of the preset liquid accumulation amount threshold interval, and the gas source well pressure is larger than the minimum starting pressure, generating a first electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas-lifted well by utilizing the first electromagnetic valve control signal, thereby starting the gas lift between the wells.
According to an embodiment of the invention, if the accumulated liquid amount of the shaft is smaller than the minimum value of the preset accumulated liquid amount threshold interval, or the gas injection duration reaches the preset maximum gas injection duration, a second solenoid valve control signal is generated, so that the second solenoid valve control signal is utilized to control the on-off state of a solenoid valve connected between the gas source well and the gas-lifted well, and thus the gas lift between the wells is finished.
According to one embodiment of the invention, the minimum activation pressure is determined according to the expression:
wherein p iseDenotes the minimum starting pressure, pLDenotes the density of the liquid, QLShowing the amount of well bore fluid, DtiShowing the tubing inside diameter.
The invention also provides an intelligent gas injection system for the gas lift between the wells, and the system adopts the method for the intelligent gas injection of the gas lift between the wells.
According to one embodiment of the invention, the system comprises:
the annular liquid level measuring device is arranged on one side of the plunger gas lift wellhead sleeve pressure gauge and is used for measuring the annular liquid level of the oil-gas well;
the shaft liquid volume determining device is connected with the annular liquid level measuring device and used for calculating the shaft liquid volume of the oil-gas well according to the annular liquid level, the obtained casing pressure and the obtained oil pressure of the oil-gas well;
and the inter-well gas lift control device is connected with the shaft liquid accumulation amount determining device and used for comparing the shaft liquid accumulation amount with a preset liquid accumulation amount threshold interval and starting inter-well gas lift or finishing inter-well gas lift according to a comparison result.
According to one embodiment of the invention, the system further comprises:
the minimum starting pressure determining device is connected with the shaft liquid volume determining device and is used for determining the minimum starting pressure according to the shaft liquid volume;
the inter-well gas lift control device is connected with the shaft liquid accumulation amount determining device and the minimum starting pressure determining device, and is used for comparing the shaft liquid accumulation amount with a preset liquid accumulation threshold interval, comparing the acquired gas source well pressure with the minimum starting pressure, and starting inter-well gas lift or finishing inter-well gas lift according to a comparison result.
According to an embodiment of the invention, if the wellbore liquid volume is larger than the maximum value of the preset liquid volume threshold interval and the gas source well pressure is larger than the minimum starting pressure, the inter-well gas lift control device is configured to generate a first solenoid valve control signal to control the on-off state of a solenoid valve connected between the gas source well and the gas lift well by using the first solenoid valve control signal, so as to start the inter-well gas lift.
The intelligent gas injection method and the intelligent gas injection system for the gas lift between the wells can automatically determine whether the gas injection and the gas lift opportunity are needed by the oil and gas wells according to the shaft effusion condition of the oil and gas wells, so that the intellectualization of the gas lift between the wells can be realized, the liquid drainage effect and the liquid drainage efficiency are improved, and the energy conservation is facilitated.
Meanwhile, according to actual needs, the method and the system can be used in cooperation with a plunger gas lift process without closing a well, so that the probability of gas-liquid slippage can be reduced, and the liquid discharge effect is further improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic flow chart of an implementation of an inter-well gas lift intelligent gas injection method according to one embodiment of the invention;
FIG. 2 is a schematic diagram of the structure of an interwell gas lift intelligent gas injection system according to one embodiment of the invention;
FIG. 3 is a schematic diagram of an application scenario of an inter-well gas lift intelligent gas injection system according to an embodiment of the invention;
FIG. 4 is a schematic diagram of an application scenario of an inter-well gas lift intelligent gas injection system according to another embodiment of the invention;
FIG. 5 is a schematic diagram of a plunger gas lift well configuration according to one embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
For the existing methods, the gas lift between wells still adopts a manual operation mode, time and labor are wasted, the gas lift time is not accurately mastered, and the liquid drainage effect is influenced. For example, gas lift when the gas source well pressure recovers insufficiently will not be able to adequately remove bottom hole fluid accumulated in the gas-lifted well; when the pressure of the gas source well is recovered too high, gas lift is carried out, so that the problems that the interval time is too long and the accumulated liquid is remained at the bottom of the well for a long time to influence production exist.
Aiming at the problems in the prior art, the invention provides a novel inter-well gas lift intelligent gas injection method and an inter-well gas lift intelligent gas injection system for performing inter-well gas injection by applying the method. The method and the system can realize intelligent gas injection of gas lift between wells, thereby reducing the labor intensity of related workers and improving the liquid discharge effect.
In order to more clearly illustrate the principle, process and advantages of the inter-well gas lift intelligent gas injection method and system provided by the invention for realizing the respective functions, the specific contents of the inter-well gas lift intelligent gas injection method and system are described in the following with reference to fig. 1 and 2. Fig. 1 shows a schematic flow chart of an implementation of the intelligent gas injection method for an inter-well gas lift provided in this embodiment, and fig. 2 shows a schematic structural diagram of the intelligent gas injection system for an inter-well gas lift provided in this embodiment.
As shown in fig. 1, in this embodiment, the method for gas lift intelligent gas injection between wells first obtains the annular liquid level of the oil and gas well in step S101. Specifically, as shown in fig. 2, in the present embodiment, the method measures the annulus level of the oil and gas well by using the annulus level measuring device 201 in the inter-well gas lift intelligent gas injection system in step S101. Wherein the annulus level measurement device 201 is preferably mounted on the side of the plunger gas lift wellhead casing pressure gauge.
In this embodiment, the annulus level measurement device 201 is preferably implemented using an automatic level measurement echometer. Of course, in other embodiments of the present invention, the annular liquid level measuring device 201 may be implemented by other reasonable devices or apparatuses according to practical needs, and the present invention is not limited thereto.
After the annular liquid level of the oil and gas well is obtained, the method calculates the wellbore liquid product volume of the oil and gas well according to the annular liquid level, the obtained casing pressure and the obtained oil pressure of the oil and gas well in step S102. Specifically, in this embodiment, the method calculates the wellbore liquid volume of the oil and gas well by using the wellbore liquid volume determination device 202 connected to the wellbore liquid volume determination device 201 in the inter-well gas lift intelligent gas injection system in step S102.
Specifically, the wellbore fluid volume determination device 202 preferably calculates the wellbore fluid volume according to the following expression:
wherein Q isLRepresents the well bore liquid volume, H represents the depth under the oil pipe, L represents the annular liquid level, pcAnd ptRespectively representing the casing pressure and oil pressure, Dti、DtoAnd DciRespectively showing the inner diameter of the oil pipe, the outer diameter of the oil pipe and the inner diameter of the casing pipe.
In this embodiment, after obtaining the wellbore fluid volume of the oil and gas well, the method further determines a minimum starting pressure according to the wellbore fluid volume in step S103. Specifically, in this embodiment, the method determines the minimum activation pressure by using the minimum activation pressure determining device 203 connected to the wellbore fluid amount determining device 202 in step S103.
For example, in the present embodiment, the minimum activation pressure determination means 203 may determine the minimum activation pressure according to the following expression:
wherein p iseDenotes the minimum starting pressure, pLDenotes the density of the liquid, QLShowing the amount of well bore fluid, DtiShowing the tubing inside diameter.
It should be noted that in other embodiments of the present invention, the wellbore fluid volume determination device 202 and/or the minimum activation pressure determination device 203 may also determine the wellbore fluid volume and/or the minimum activation pressure in other reasonable manners according to actual situations, and the present invention is not limited thereto.
Subsequently, the method determines whether to start or end the gas lift in step S104 according to the volume of the wellbore determined in step S102 and the minimum start pressure determined in step S103.
Specifically, in this embodiment, the inter-well gas lift control device 204 is connected to the wellbore liquid accumulation amount determination device 202 and the minimum start pressure determination device 203, and compares the wellbore liquid accumulation amount with the preset liquid accumulation threshold interval in step S104, and also compares the acquired gas source well pressure with the minimum start pressure, so as to start the inter-well gas lift or end the inter-well gas lift according to the comparison result.
Preferably, if the accumulated liquid amount in the well bore is greater than the maximum value of the preset accumulated liquid amount threshold interval and the gas source well pressure is greater than the minimum starting pressure, the inter-well gas lift control device 204 generates a first solenoid valve control signal in step S105, so as to control the on-off state of a solenoid valve 205 connected between the gas source well and the gas lift well by using the first solenoid valve control signal, thereby starting the inter-well gas lift.
If the accumulated liquid amount of the shaft is smaller than the minimum value of the preset accumulated liquid amount threshold interval, or the gas injection duration reaches the preset maximum gas injection duration, the inter-well gas lift control device 204 generates a second electromagnetic valve control signal to control the on-off state of an electromagnetic valve connected between the gas source well and the gas lift well by using the second electromagnetic valve control signal, so that the inter-well gas lift is finished.
It should be noted that, in different embodiments of the present invention, the specific value of the preset liquid accumulation amount threshold interval may be configured to be different reasonable values according to actual needs, and the present invention does not limit the specific value of the preset liquid accumulation amount threshold interval.
As shown in fig. 3, in the present embodiment, the wellbore liquid volume determining device 202, the minimum activation pressure determining device 203, and the interwell gas lift control device 204 are preferably integrated in the remote data processing terminal 301. The remote data processing end 301 controls the operation state of the solenoid valve 205 connected between the valve of the gas source well and the check valve of the gas-lifted well through the control cabinet 302.
Of course, in other embodiments of the present invention, the inter-well gas lift intelligent gas injection method and the intelligent gas injection system can also be applied to a multilateral inter-well gas lift system as shown in fig. 4 according to actual needs. Research and analysis show that the existing inter-well gas lift process cannot meet the requirements of cluster well groups, and the two aspects are embodied.
One is that the labor intensity is large and the safety risk is high. The existing method needs to manually switch the valve, and workers need to accompany until the gas lift is finished and can leave, and the time consumption is 0.5-1 hour each time. When being the multiple well by gas lift well, personnel's working duration will be the multiple increase to switch valve operation is frequent, and the safety risk increases.
Secondly, the management difficulty is high, and the process effect is poor. Before each gas lift, the gas injection time needs to be judged according to the pressure recovery condition of the gas source well and the effusion condition of the gas lift well. When the gas-lifted well is a plurality of wells, the dynamic state of each well needs to be concerned all the time, different gas injection systems are formulated for each well, the manual management difficulty is increased, the error probability is high, and the process effect is influenced.
For the multilateral inter-well gas lift system, the inter-well gas lift intelligent gas injection method and the intelligent gas injection system provided by the embodiment can realize independent gas injection control of each gas lift well through the solenoid valve corresponding to each gas lift well. Therefore, the labor intensity can be effectively reduced, and the safety risk in the process of gas lift between wells can be effectively reduced. In addition, the gas lift well in the inter-well gas lift system shown in fig. 3 and 4 can also be realized by adopting a plunger gas lift well as shown in fig. 5, and the inter-well gas lift intelligent gas injection method and the intelligent gas injection system provided by the invention are also applicable to the well diameter gas lift system.
It should be noted that, in other embodiments of the present invention, according to actual needs, the method for intelligently injecting gas lift between wells may further not determine the minimum starting pressure, but only compare the accumulated liquid volume of the well with a preset accumulated liquid volume threshold interval, and start gas lift between wells or end gas lift between wells according to the comparison result.
Correspondingly, the inter-well gas lift intelligent gas injection system does not comprise a minimum starting pressure determining device, the inter-well gas lift control device compares the shaft liquid accumulation amount of the oil-gas well determined by the shaft liquid accumulation amount determining device with a preset liquid accumulation threshold interval, and the inter-well gas lift is started or ended according to a comparison result.
If the accumulated liquid amount of the shaft is larger than the maximum value of the preset accumulated liquid amount threshold interval, the gas lift control device between the wells can generate a first electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas lift well by utilizing the first electromagnetic valve control signal, and accordingly gas lift between the wells is started.
And if the accumulated liquid volume of the shaft is smaller than the minimum value of the preset accumulated liquid volume threshold interval, the inter-well gas lift control device can generate a second electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas lift well by utilizing the second electromagnetic valve control signal, thereby finishing the inter-well gas lift.
From the above description, it can be seen that the inter-well gas lift intelligent gas injection method and the intelligent gas injection system provided by the invention can automatically determine whether the gas injection and the gas lift opportunity are needed by the oil and gas well according to the shaft effusion condition of the oil and gas well, so that the intelligence of the inter-well gas lift can be realized, the liquid drainage effect and the liquid drainage efficiency are improved, and the energy conservation is facilitated.
Meanwhile, according to actual needs, the method and the system can be used in cooperation with a plunger gas lift process without closing a well, so that the probability of gas-liquid slippage can be reduced, and the liquid discharge effect is further improved.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (12)
1. An intelligent gas lift injection method between wells, which is characterized by comprising the following steps:
acquiring an annular liquid level of an oil-gas well;
secondly, calculating the wellbore liquid accumulation of the oil-gas well according to the annular liquid level, the casing pressure of the oil-gas well and the oil pressure;
and step three, comparing the accumulated liquid volume of the shaft with a preset accumulated liquid volume threshold interval, and starting or finishing gas lift between wells according to a comparison result.
2. The method of claim 1, wherein in step one, the annulus fluid level is measured using an echometer mounted on a side of a plunger gas lift wellhead cuff pressure gauge.
3. The method according to claim 1 or 2, wherein in the second step, the periodic discharge capacity is calculated according to the following expression:
wherein Q isLRepresents the well bore liquid volume, H represents the depth under the oil pipe, L represents the annular liquid level, pcAnd ptRespectively representing the casing pressure and oil pressure, Dti、DtoAnd DciRespectively showing the inner diameter of the oil pipe, the outer diameter of the oil pipe and the inner diameter of the casing pipe.
4. The method according to any one of claims 1 to 3, wherein, in the third step,
if the well bore liquid accumulation amount is larger than the maximum value of the preset liquid accumulation amount threshold interval, generating a first electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between a gas source well and a gas-lifted well by utilizing the first electromagnetic valve control signal, and starting gas-lifted between wells;
and if the accumulated liquid volume of the shaft is smaller than the minimum value of the preset accumulated liquid volume threshold interval, generating a second electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas-lifted well by utilizing the second electromagnetic valve control signal, thereby finishing gas lifting between the wells.
5. The method of any of claims 1 to 4, wherein in step three, a minimum activation pressure is also determined based on the wellbore fluid volume,
and comparing the well bore liquid accumulation amount with a preset liquid accumulation amount threshold interval, comparing the acquired gas source well pressure with the minimum starting pressure, and starting or finishing the gas lift between the wells according to a comparison result.
6. The method according to claim 5, wherein in the third step,
and if the well bore liquid accumulation amount is larger than the maximum value of the preset liquid accumulation amount threshold interval, and the gas source well pressure is larger than the minimum starting pressure, generating a first electromagnetic valve control signal so as to control the on-off state of an electromagnetic valve connected between the gas source well and the gas-lifted well by utilizing the first electromagnetic valve control signal, thereby starting the gas lift between the wells.
7. The method of claim 6, wherein if the accumulated liquid volume in the wellbore is less than the minimum value of the threshold interval of the preset accumulated liquid volume or the gas injection duration reaches the preset maximum gas injection duration, generating a second solenoid valve control signal to control the on-off state of a solenoid valve connected between the gas source well and the gas-lifted well by using the second solenoid valve control signal, thereby ending the gas lift between the wells.
8. A method according to any of claims 5 to 7, wherein the minimum activation pressure is determined according to the expression:
wherein p iseDenotes the minimum starting pressure, pLDenotes the density of the liquid, QLShowing the amount of well bore fluid, DtiShowing the tubing inside diameter.
9. An intelligent gas injection system for gas lift between wells, which is characterized in that the system adopts the method as claimed in any one of claims 1-8 to perform intelligent gas injection for gas lift between wells.
10. The system of claim 9, wherein the system comprises:
the annular liquid level measuring device is arranged on one side of the plunger gas lift wellhead sleeve pressure gauge and is used for measuring the annular liquid level of the oil-gas well;
the shaft liquid volume determining device is connected with the annular liquid level measuring device and used for calculating the shaft liquid volume of the oil-gas well according to the annular liquid level, the obtained casing pressure and the obtained oil pressure of the oil-gas well;
and the inter-well gas lift control device is connected with the shaft liquid accumulation amount determining device and used for comparing the shaft liquid accumulation amount with a preset liquid accumulation amount threshold interval and starting inter-well gas lift or finishing inter-well gas lift according to a comparison result.
11. The system of claim 10, wherein the system further comprises:
the minimum starting pressure determining device is connected with the shaft liquid volume determining device and is used for determining the minimum starting pressure according to the shaft liquid volume;
the inter-well gas lift control device is connected with the shaft liquid accumulation amount determining device and the minimum starting pressure determining device, and is used for comparing the shaft liquid accumulation amount with a preset liquid accumulation threshold interval, comparing the acquired gas source well pressure with the minimum starting pressure, and starting inter-well gas lift or finishing inter-well gas lift according to a comparison result.
12. The system of claim 11, wherein if the wellbore volume is greater than a maximum value of the preset volume threshold interval and the gas source well pressure is greater than the minimum activation pressure, the interwell gas lift control device is configured to generate a first solenoid valve control signal to control a switching state of a solenoid valve connected between the gas source well and the gas lifted well using the first solenoid valve control signal to activate an interwell gas lift.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111364948A (en) * | 2020-04-30 | 2020-07-03 | 成都百胜野牛科技有限公司 | Natural gas well and well group |
| CN111364949A (en) * | 2020-04-30 | 2020-07-03 | 成都百胜野牛科技有限公司 | Natural gas well group |
| CN113356805A (en) * | 2021-07-16 | 2021-09-07 | 中国海洋石油集团有限公司 | Inter-well agitation type gas lift induced flow device and gas lift induced flow method |
| CN114412427A (en) * | 2020-10-12 | 2022-04-29 | 北京星油科技有限公司 | Gas lift and production integrated oil and gas exploitation system |
| CN115263244A (en) * | 2021-04-29 | 2022-11-01 | 中国石油天然气股份有限公司 | Drainage control method and device for gas-water layer and computer storage medium |
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| CN114412427A (en) * | 2020-10-12 | 2022-04-29 | 北京星油科技有限公司 | Gas lift and production integrated oil and gas exploitation system |
| CN114412427B (en) * | 2020-10-12 | 2023-11-14 | 北京星油科技有限公司 | Gas lift and production integrated oil gas exploitation system |
| CN115263244A (en) * | 2021-04-29 | 2022-11-01 | 中国石油天然气股份有限公司 | Drainage control method and device for gas-water layer and computer storage medium |
| CN115263244B (en) * | 2021-04-29 | 2023-09-26 | 中国石油天然气股份有限公司 | Method and device for controlling drainage of air-water layer and computer storage medium |
| CN113356805A (en) * | 2021-07-16 | 2021-09-07 | 中国海洋石油集团有限公司 | Inter-well agitation type gas lift induced flow device and gas lift induced flow method |
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