CN115059438A - Water injection allocation method for wave code injection well - Google Patents
Water injection allocation method for wave code injection well Download PDFInfo
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- CN115059438A CN115059438A CN202210602760.4A CN202210602760A CN115059438A CN 115059438 A CN115059438 A CN 115059438A CN 202210602760 A CN202210602760 A CN 202210602760A CN 115059438 A CN115059438 A CN 115059438A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 251
- 238000002347 injection Methods 0.000 title claims abstract description 216
- 239000007924 injection Substances 0.000 title claims abstract description 216
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009826 distribution Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 37
- 239000003921 oil Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/16—Control means therefor being outside the borehole
-
- 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
- E21B43/14—Obtaining from a multiple-zone well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a water injection allocation method of a wave code injection well, which comprises the following steps: and the ground control equipment detects corresponding water injection pressure when time-sharing and steady-flow water injection is carried out according to the injection allocation requirements of all layers. The underground water distributor obtains the required injection flow rate of each layer and the injection pressure of each layer. After time-sharing and steady flow are finished, the ground control equipment carries out steady-pressure water injection according to the maximum value in the obtained water injection pressures of all layers, the water distributor of the layer with the minimum water injection pressure carries out flow distribution firstly, and when the measured flow meets the injection distribution requirement. And then the layer with the next smaller water injection pressure is prepared, and the rest is done in the same way. The invention can quickly and efficiently adjust the flow of each layer in the well, so that the flow meets the actual injection allocation requirement, and the working efficiency of stratum water injection production increase is further improved.
Description
Technical Field
The invention belongs to the field of intelligent layered water injection of petroleum and natural gas, and particularly relates to a water injection allocation method of a wave code injection well.
Background
With the continuous development of oil and gas fields, the pressure and the oil content of an oil layer are continuously reduced, the yield of an oil well is continuously reduced, even production is stopped, and a large amount of crude oil in a part of stratums cannot be extracted. In order to make up for the stratum vacancy caused by crude oil exploitation and realize high and stable production of an oil field, water must be injected into an oil layer to ensure the pressure of the oil layer. Because the oil layer output is inconsistent and the water injection of each oil layer is inconsistent due to the influence of factors such as the oil layer pressure or the porosity and the like, the stratum is required to be subjected to layered water injection, namely the fine control of the stratum water injection is realized, and the oil extraction rate is improved.
The current commonly used flow allocation method in the field of petroleum and natural gas is mainly a technology of measuring and adjusting at the same time. The technology needs to preset a cable or complete the logging truck in the later period, instrument power supply and data instruction transmission are completed by means of the cable, allocation efficiency is low, and exploitation operation efficiency is affected.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a water injection allocation method for a wave code injection well. The technical problem to be solved by the invention is realized by the following technical scheme:
a water injection allocation method for a wave code injection well comprises the following steps:
the ground control equipment sends a blending starting instruction to the underground water distributor through pressure waves; the allocation starting instruction comprises preset water injection valve opening time and a starting command;
the underground water distributor opens or closes the water injection valve according to the corresponding preset water injection valve opening time; the water injection valve of the water distributor of one layer is opened, and the water injection valves of the water distributors of other layers are closed;
the ground control equipment sequentially injects water into the underground multilayer water distributor according to the preset water injection valve opening time and the corresponding target injection allocation flow;
when the actual ground water injection flow reaches the corresponding target injection allocation flow, the ground control equipment acquires the corresponding target water injection pressure, a water distributor with a closed water injection valve acquires the corresponding injection allocation internal pressure according to the preset water injection valve opening time, and a water distributor with a opened water injection valve acquires the target injection allocation flow and the target internal pressure;
the ground control equipment injects water to the multilayer water distributor according to the maximum value of the target water injection pressure;
and the water distributor controls the opening of the water injection valve according to the regulating sequence of the plurality of injection distribution internal pressures and the target internal pressure from small to large so that the actual flow rate is equal to the corresponding target injection distribution flow rate.
In one embodiment of the present invention, the obtaining of the target injection flow rate and the target internal pressure by the water distributor with the water injection valve open comprises:
detecting and acquiring the current flow and the current internal pressure by a water distributor for opening the water injection valve;
the current flow rate is the target injection allocation flow rate, and the current internal pressure is the target internal pressure.
In one embodiment of the invention, the method further comprises: the water distributor detects pressure data of the pressure waves to obtain a distribution starting instruction;
and the water distributor acquires the opening time of the preset water injection valve according to the allocation starting instruction.
In one embodiment of the present invention, the downhole water distributor opens or closes the water injection valve according to a preset water injection valve opening time, comprising:
and when the water distributor detects that the duration from the time for acquiring the opening time of the preset water injection valve to the current time is equal to the opening time of the preset water injection valve, the water injection valve of the water distributor is opened.
In one embodiment of the invention, the method further comprises:
the water distributor determines the adjustment sequence of the water distributor according to the comparison result of the plurality of injection distribution internal pressures and the corresponding target internal pressures.
The invention has the beneficial effects that:
1. the communication between the ground control equipment and the water distributor of the underground layered water injection device is realized by adopting a wave code communication mode, and the use requirements of different well conditions, particularly the use requirements of different permeability can be met.
2. The ground injects water according to the injection allocation requirement of each layer in a time-sharing manner according to the preset opening time of the water injection valve, the injection allocation flow of each layer can be efficiently transmitted to the water injection distributors of the corresponding underground layer, and the effective transmission of the injection allocation flow of the target layer is realized. Meanwhile, the ground control equipment and the underground water distributor acquire water injection pressure information during flow allocation, and a basis is provided for quick allocation.
3. The ground control equipment is in a voltage stabilization state in the allocation process, and the problem of interlayer interference of water injection devices at all layers in the well is avoided. And a stable foundation is provided for the success of flow allocation.
4. The dispatching efficiency is improved, the operation is simple, and the reliability of communication is improved.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic flow chart of a water injection allocation method for a cdma injection well according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a water injection allocation system of a cdma injection well according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a water distributor of a water injection and blending system of a wave code injection well according to an embodiment of the present invention;
fig. 4 is a diagram of allocation start instruction patterns of a method for allocating water injection in a cdma injection well according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
As shown in fig. 1, a water injection allocation method for a code injection well includes the following steps:
102, opening or closing a water injection valve by an underground water distributor according to preset water injection valve opening time; the water injection valve of the water distributor of one layer is opened, and the water injection valves of the water distributors of other layers are closed.
And 103, sequentially injecting water into the underground multilayer water distributor by the ground control equipment according to the preset water injection valve opening time and the corresponding target injection distribution flow.
And 104, when the actual water injection flow reaches the corresponding target injection allocation flow, the ground control equipment acquires the corresponding target water injection pressure, the water distributor with the closed water injection valve acquires a plurality of corresponding injection allocation internal pressures according to the preset water injection valve opening time, and the water distributor with the opened water injection valve acquires the target injection allocation flow and the target internal pressure.
And 105, the ground control equipment injects water into the multilayer water distributor at the maximum value of the target water injection pressure.
And 106, sequentially controlling the opening of the water injection valve by the water distributor according to the plurality of injection allocation internal pressures and the target internal pressure in an adjusting sequence from small to large so that the actual flow rate is equal to the corresponding target injection allocation flow rate.
In the embodiment, the ground control equipment is communicated with the water distributor of the underground layered water injection device by adopting a wave code communication mode, so that the use requirements of different well conditions, particularly the use requirements of different permeabilities, can be met. The ground injects water according to the injection allocation requirement of each layer in a time-sharing manner according to the preset opening time of the water injection valve, the injection allocation flow of each layer can be efficiently transmitted to the water injection distributors of the corresponding underground layer, and the effective transmission of the injection allocation flow of the target layer is realized. Meanwhile, the ground control equipment and the underground water distributor acquire water injection pressure information during flow allocation, and a basis is provided for quick allocation. The ground control equipment is in a voltage stabilization state in the allocation process, and the problem of interlayer interference of water injection devices at all layers in the well is avoided. And a stable foundation is provided for the success of flow allocation. The dispatching efficiency is improved, the operation is simple, and the reliability of communication is improved.
Example two
The embodiment provides a water injection allocation method for a wave code injection well, which comprises the following steps:
step 201, sending a blending starting instruction to an underground water distributor by ground control equipment through pressure waves; the allocation starting instruction comprises preset water injection valve opening time and a starting command. The surface control unit generates a time sequenced high and low pressure combined pulse train by controlling the opening and closing of the surface fill valve, as shown in fig. 4.
Each water distributor senses pressure data of the pressure waves to obtain deployment firing instructions and firing commands, step 202.
And 203, the water distributor acquires the preset opening time of the water injection valve according to the allocation starting instruction. And the underground water distributor analyzes the pulse sequence to obtain related commands and information. And the water distributor analyzes the starting command and the starting command to obtain a distribution starting command, and the water distributor obtains the preset opening time of the water injection valve according to the distribution starting command after entering a preparation working state according to the starting command.
204, the underground water distributor opens or closes a water injection valve according to the corresponding preset water injection valve opening time; the water injection valve of the water distributor of one layer is opened, and the water injection valves of the water distributors of other layers are closed.
Specifically, when the water distributor detects that the duration from the time of obtaining the preset water injection valve opening time to the current time is equal to the preset water injection valve opening time, the water injection valve of the water distributor is opened.
After the pressure wave is detected by the water distributor, the opening time of the preset water injection valve is obtained, the preset water injection valve opening time indicates that the water distributor receives a distribution starting instruction, and the water injection valves are respectively opened in different time after the distribution starting instruction is received. For example, the time for receiving the blending starting instruction is t, the time interval is n, the water injection valve of the first-layer water distributor is opened after the time duration of t + n, the water injection valves of the other-layer water distributors are all closed, the water injection valve of the second-layer water distributor is opened after the time duration of t +2n, the water injection valves of the other-layer water distributors are all closed, the water injection valve of the third-layer water distributor is opened after the time duration of t +3n, the water injection valves of the other-layer water distributors are all closed, and the like, and each water distributor corresponds to one preset water injection valve opening time. The water injection valve is opened from the first-layer water distributor to perform time-sharing injection, namely step 205 is executed.
And step 205, the ground control equipment sequentially injects water into the underground multilayer water distributors according to the preset water injection valve opening time and the corresponding target injection distribution flow. The target injection allocation flow is preset in the ground control equipment, and different preset water injection valve opening time corresponds to different target injection allocation flow. Different preset water injection valve opening time corresponds to different water distributors, the ground control equipment performs water injection according to different target injection flow rates, for example, the water injection valve of the second-layer water distributor is opened, the water injection valves of the water distributors of other layers are closed, and the ground control equipment performs water injection according to the target injection flow rate corresponding to the second-layer water distributor.
And step 206, when the actual ground water injection flow reaches the corresponding target injection allocation flow, the ground control equipment acquires the corresponding target water injection pressure, the water distributor with the closed water injection valve acquires a plurality of corresponding injection allocation internal pressures according to the preset water injection valve opening time, the water distributor with the opened water injection valve detects and acquires the current flow and the current internal pressure, the current flow is the target injection allocation flow, and the current internal pressure is the target internal pressure.
Specifically, when water is injected every time according to each target injection flow, the water distributor with the closed water injection valve detects the corresponding injection internal pressure during water injection every time, and stores the injection internal pressure data. And the ground is sequentially injected with water at a target injection allocation flow rate every time, the opening time of each preset water injection valve corresponds to each target injection allocation flow rate, namely corresponds to the water distributor of each layer, the target internal pressure of one water distributor with the water injection valve opened corresponds to the target injection allocation flow rate of each water injection, and the water distributors with the water injection valves closed store the target internal pressures of other layers as the injection allocation internal pressures. Thus, each dispenser will store the injection internal pressure of all other dispensers and its own target internal pressure. And (4) ending the time-sharing steady-flow water injection of all the layers according to the injection allocation requirements of all the layers, starting the water injection valves of all the layers, and starting to carry out formal water injection work and allocation, namely executing the step 207.
And step 207, the ground control equipment injects water into the multilayer water distributor at the maximum value of the target water injection pressure.
And step 208, the water distributor determines the adjusting sequence of the water distributor according to the comparison result of the plurality of injection distribution internal pressures and the target internal pressures corresponding to the water distributor. And each water distributor compares the target internal pressure with the stored injection distribution internal pressures of other water distributors, and after comparison, the adjustment sequence of the water distributors can be determined according to the sequence of the injection distribution internal pressures from small to large and according to a certain time sequence. The water distributor stores its own adjustment sequence and starts timing.
And step 209, the multilayer water distributor sequentially controls the opening degree of the water injection valve thereof according to the adjusting sequence so that the actual flow rate is equal to the corresponding target injection flow rate. For example, after the adjustment sequence is determined, that is, after the adjustment sequence is determined, all the water distributors start timing, the water distributor with the minimum target internal pressure starts timing, and adjustment is started after a fixed period of time T. And starting to adjust when the timing of the water distributor with small target internal pressure reaches two fixed period T, and repeating the steps until the adjustment of the water distributor with large target internal pressure is completed. The water distributor with the maximum target internal pressure does not need to be adjusted, and the maximum opening degree of the water injection valve is kept.
In this embodiment, as shown in fig. 2 and 3, the water injection allocation system of the waveguide injection well includes: surface control equipment 12, surface control equipment's regulating valve 11, a plurality of packers 13, a plurality of water distributors 14, tubing 18, and casing 17. The water distributor 14 comprises an upper joint 1, an outer protecting pipe 2, a lower joint 3 (comprising a pressure detection part and a flow detection part) and a water outlet 4 of a water injection valve.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (5)
1. A water injection allocation method for a wave code injection well is characterized by comprising the following steps:
the ground control equipment sends a blending starting instruction to the underground water distributor through pressure waves; the allocation starting instruction comprises preset water injection valve opening time and a starting command;
the underground water distributor opens or closes the water injection valve according to the corresponding preset water injection valve opening time; the water injection valve of the water distributor of one layer is opened, and the water injection valves of the water distributors of other layers are closed;
the ground control equipment sequentially injects water into the underground multilayer water distributor according to the preset water injection valve opening time and the corresponding target injection allocation flow;
when the actual ground water injection flow reaches the corresponding target injection allocation flow, the ground control equipment acquires the corresponding target water injection pressure, a water distributor with a closed water injection valve acquires a plurality of corresponding injection allocation internal pressures according to the preset water injection valve opening time, and a water distributor with a opened water injection valve acquires the target injection allocation flow and the target internal pressure;
the ground control equipment injects water to the multilayer water distributor according to the maximum value of the target water injection pressure;
and the water distributor controls the opening of the water injection valve according to the regulating sequence of the plurality of injection distribution internal pressures and the target internal pressure from small to large so that the actual flow rate is equal to the corresponding target injection distribution flow rate.
2. The water injection allocation method of the code injection well according to claim 1, wherein the target injection allocation flow rate and the target internal pressure are obtained by a water injection distributor with the water injection valve opened, and the method comprises the following steps:
detecting and acquiring the current flow and the current internal pressure by a water distributor for opening the water injection valve;
the current flow rate is the target injection allocation flow rate, and the current internal pressure is the target internal pressure.
3. The method for allocating water injection of a waveguide injection well according to claim 2, further comprising: the water distributor detects pressure data of the pressure waves to obtain the deployment starting instruction and the starting command;
and the water distributor acquires the preset opening time of the water injection valve according to the allocation starting instruction.
4. The water injection allocation method of the code division injection well according to claim 3, wherein the underground water distributor opens or closes the water injection valve according to a preset water injection valve opening time, and comprises the following steps:
and when the water distributor detects that the duration from the time for acquiring the opening time of the preset water injection valve to the current time is equal to the opening time of the preset water injection valve, the water injection valve of the water distributor is opened.
5. The method for allocating water injection of a waveguide injection well according to claim 4, further comprising:
the water distributor determines the adjustment sequence of the water distributor according to the comparison result of the plurality of injection distribution internal pressures and the corresponding target internal pressures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210602760.4A CN115059438A (en) | 2022-05-30 | 2022-05-30 | Water injection allocation method for wave code injection well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210602760.4A CN115059438A (en) | 2022-05-30 | 2022-05-30 | Water injection allocation method for wave code injection well |
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| CN113338881A (en) * | 2021-07-23 | 2021-09-03 | 西安洛科电子科技股份有限公司 | Wave code communication intelligent water distributor flow underground online calibration method |
| CN113503149A (en) * | 2021-07-13 | 2021-10-15 | 西安思坦仪器股份有限公司 | Underground low-power-consumption stratified water injection control method and system |
| CN113653473A (en) * | 2020-04-28 | 2021-11-16 | 中国石油天然气股份有限公司 | Water injection system and water injection method |
| CN113931601A (en) * | 2021-08-31 | 2022-01-14 | 西安洛科电子科技股份有限公司 | Wave code intelligent separate injection system and adjusting method |
-
2022
- 2022-05-30 CN CN202210602760.4A patent/CN115059438A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619097A (en) * | 2004-11-27 | 2005-05-25 | 吴杰 | Method of regulating layered water distribution using pressure wave |
| CN108121369A (en) * | 2017-12-20 | 2018-06-05 | 中国石油天然气股份有限公司 | A kind of Intelligent water injection remote control apparatus and method |
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Application publication date: 20220916 |