CN111042760A - Seal testing device and method for underground packer of intelligent measurement and control water injection well - Google Patents
Seal testing device and method for underground packer of intelligent measurement and control water injection well Download PDFInfo
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- CN111042760A CN111042760A CN201811186557.3A CN201811186557A CN111042760A CN 111042760 A CN111042760 A CN 111042760A CN 201811186557 A CN201811186557 A CN 201811186557A CN 111042760 A CN111042760 A CN 111042760A
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- water injection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention discloses an intelligent measurement and control water injection well downhole packer seal testing device and method. The inlet of the digital display pressure gauge is communicated with the outlet of the wellhead pressure stabilizing system, and the outlet of the wellhead pressure stabilizing system is communicated with the water pipe. The digital display flow meter is characterized by further comprising a data wireless transceiver, wherein the data wireless transceiver is respectively in wireless signal connection with the digital display flow meter and the digital display pressure meter. The invention judges the packing effect of the underground packer of the intelligent measurement and control water injection well on the ground according to the change condition of the wellhead flow, and is a seal checking method for the construction of a wireless intelligent measurement and control separate injection process pipe column.
Description
Technical Field
The invention relates to an oil exploitation technology, in particular to an intelligent measurement and control water injection well downhole packer seal testing device and method.
Background
The existing wireless intelligent separate injection technology fundamentally changes the traditional test and adjustment mode, realizes real-time online test and adjustment, reduces the workload of test and adjustment, and becomes a new direction of the separate injection technology. The wireless separate injection technology mainly depends on the power supply of a built-in battery of the intelligent water distributor or an underground power generation device and the like, and the intermediate power signal transmission link is reduced. However, the current water injection well packer seal inspection technology still depends on a wired cable to put down a seal inspection instrument to perform a method for testing the up-down pressure of the packer to perform seal inspection, and is not suitable for the current low-cost requirements of time reduction, personnel reduction and the like. The self-checking method of the upper and lower pressure sensors of the existing seal checking instrument has the defects of long operation time, large error and the like, and is easy to generate misjudgment.
CN201310009501.1 describes a control device for downhole zonal flow of a water injection well, which realizes seal testing of a packer by a seal testing pressure gauge installed on the downhole device. The wireless remote real-time regulation and measurement system for the water injection well described in CN201610425768.2 can realize functions of remotely monitoring the water injection dynamics of the water injection well in real time under an office environment, remotely automatically testing the seal in the well and the like, and can realize the seal testing of a packer by arranging a vortex flowmeter and a pressure sensor on an intelligent water distributor in the well. The method for quickly testing the seal of the ground of the water injection well casing protection packer described in CN201510363287.9 mainly adopts pressure collectors respectively installed at an oil pressure recording position and a casing pressure recording position, changes oil pressure through intermittent manual participation, and judges the seal testing condition of the packer according to recorded pressure data. CN201310217452.0 describes a packer seal inspection method and a seal inspection tool for a layered water injection well, and the method judges the sealing condition of the packer by correspondingly placing a plugging differential pressure flowmeter in different stratums in the water injection well to test and acquire related parameters of the different stratums. The Cheng-Dong 'new process research and test for seal inspection of a separate layer water injection well' is to measure a flow curve through an electromagnetic flow nipple and judge that an interlayer packer is not sealed together with a pressure curve. The above patents or new technologies all need to install a pressure sensing device at the underground water injection layer, and determine the setting effect of the packer by measuring the pressure change curve before and after setting of the packer or combining the flow curve of the water injection layer. The data transmission of the pressure sensor increases the power consumption of the intelligent measurement and control system of the water injection well, so that the service life of the wireless measurement and control system of the water injection well is greatly reduced, and the popularization and the use of the system are restricted.
Disclosure of Invention
The invention aims to provide an underground packer seal inspection device and method for an intelligent measurement and control water injection well, which are used for judging the underground packer seal effect of the intelligent measurement and control water injection well on the ground according to the flow change condition of a well head, are seal inspection methods for wireless intelligent measurement and control separated injection process pipe column construction, can also be applied to a wired intelligent injection allocation well, and can be suitable for popularization and application of injection wells such as a gas injection well, a steam injection well and the like.
In order to achieve the purpose, the invention adopts the following technical scheme that the packer seal inspection device for the intelligent measurement and control water injection well comprises a water injection pipe column, wherein a packer is arranged on the water injection pipe column, the upper end of the water injection pipe column is connected with a wellhead oil pipe cross joint, the packer seal inspection device further comprises a digital display pressure gauge, a flow valve and a digital display flow meter, the outlet of the digital display pressure gauge is communicated with the inlet of the flow valve, the outlet of the flow valve is communicated with the inlet of the digital display flow meter, and the outlet of. The inlet of the digital display pressure gauge is communicated with the outlet of the wellhead pressure stabilizing system, and the outlet of the wellhead pressure stabilizing system is communicated with the water pipe.
The digital display flow meter is characterized by further comprising a data wireless transceiver, wherein the data wireless transceiver is respectively in wireless signal connection with the digital display flow meter and the digital display pressure meter.
The underground water injection pipe column comprises an oil pipe, at least two packers and at least two underground flow measurement and control valves, wherein the packers are arranged on the oil pipe and separate the underground flow measurement and control valves, so that each underground flow measurement and control valve corresponds to a respective water injection layer.
In order to achieve the purpose, the invention adopts the following technical scheme that after all layers of packers are sealed, a water injection valve is opened to inject water, the injection pressure of the whole water injection well is controlled by a ground pressure stabilizing system, underground flow data is formed by adjusting a water nozzle of a flow valve, the underground flow measuring and controlling valves of all layers recognize and receive flow data instructions, the water nozzle is opened or transmission data is collected according to the instruction requirements, when the water nozzle of a certain layer of underground flow measuring and controlling valve is opened, the numerical value of a ground digital display pressure gauge and the numerical value of a digital display flow meter are recorded, then the water nozzle of the other layer of underground flow measuring and controlling valve is opened by a wellhead conversion flow numerical value instruction, the flow numerical value measured by the digital display flow meter of the wellhead is observed after the pressure of the wellhead injected fluid is stable and the numerical value of the digital display pressure gauge which is just recorded is recovered, and if the data is basically unchanged, and indicating the two water injection layers to jump, and setting each packer between the layers to be unqualified.
Compared with the prior art, the invention has the following beneficial effects:
after the packers are all seated, the water injection valve is opened to inject water, the ground pressure stabilizing system controls the injection pressure of the whole water injection well, underground flow data is formed by adjusting the water nozzles of the flow valve, the underground flow measuring and controlling valve identifies and receives flow data instructions, the water nozzles are opened or transmission data are collected, when a certain layer of water nozzles are opened, another layer of water nozzles are opened, the total flow measured by the wellhead digital display flowmeter is unchanged or not changed greatly, and the situation that the packer between the two layers is not well seated is indicated.
A water injection pressure stabilizing pump is arranged at the wellhead of the water injection well; intelligently controlling the water nozzle switch of the underground water distributor, and judging the packer packing effect according to the variation of the total flow of the wellhead; well head operation or indoor remote control, easy operation tests sealed data reliable.
Drawings
FIG. 1 is a schematic structural view of an intelligent measurement and control water injection well downhole packer seal inspection device of the invention;
FIG. 2 is a flow data listing transmitted by the wellhead wireless transceiver.
In the figure: the system comprises a wellhead pressure stabilizing system 1, a data wireless transceiver 2-1, a digital display pressure gauge 2-2, a flow valve 2-3, a digital display flow meter 2-4, an oil pipe 3, a casing 4, a first layer packer 5-1, a first layer downhole flow measuring and controlling valve 6-1, a first layer water injection layer 7-1, a second layer packer 5-2, a second layer downhole flow measuring and controlling valve 6-2, a second layer water injection layer 7-2, a third layer packer 5-3, a third layer downhole flow measuring and controlling valve 6-3, a third layer water injection layer 7-3 and a plug 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the underground packer seal testing device mainly comprises an underground water injection pipe column, a wellhead pressure stabilizing system 1, a data wireless transceiver 2-1, a digital display pressure gauge 2-2, a flow valve 2-3 and a digital display flowmeter 2-4, wherein the underground water injection pipe column comprises an oil pipe 3, a first layer of packer 5-1, a first layer of underground flow measuring and controlling valve 6-1, a second layer of packer 5-2, a second layer of underground flow measuring and controlling valve 6-2, a third layer of packer 5-3, a third layer of underground flow measuring and controlling valve 6-3 and a plug 8 which are sequentially connected to the oil pipe from top to bottom. Wherein, the one-layer underground flow measuring and controlling valve 6-1 corresponds to the one-layer water injection layer 7-1, the two-layer underground flow measuring and controlling valve 6-2 corresponds to the two-layer water injection layer 7-2, and the three-layer underground flow measuring and controlling valve 6-3 corresponds to the three-layer water injection layer 7-3. The wellhead pressure stabilizing system 1 is the conventional technology of oil wells in the technical field, and can be directly connected for use.
The output end of the wellhead pressure stabilizing system 1 is connected with a digital display pressure gauge 2-2, a flow valve 2-3, a digital display flow meter 2-4 and a wellhead oil pipe four-way valve in sequence.
The data wireless transceiver 2-1 collects data of the digital display flow meter 2-4 and the digital display pressure meter 2-2, and has the function of receiving and transmitting data to an indoor computer and the like.
A seal checking method for the underground packer of intelligent measurement and control water injection well is characterized in that after all layers of packers are set, water injection is carried out by opening a water injection valve, the injection pressure of the whole water injection well is controlled by a ground pressure stabilizing system 1, underground flow data is formed by adjusting a water nozzle of a flow valve 2-3, the underground flow measurement and control valves of all layers recognize and receive flow data instructions, the water nozzle is opened or transmission data are collected, after the water nozzle of a certain layer of underground flow measurement and control valve 6 is opened, the numerical value of a ground digital display pressure gauge 2-2 and the numerical value of a digital display flow gauge 2-4 are recorded, the water nozzle of the other layer of underground flow measurement and control valve 6 is opened by changing the flow numerical value instruction through a well opening, when the injection pressure of fluid at the well opening is stable, the numerical value of the digital display flow gauge 2-2 which is just recorded is recovered, the pressure gauge measured by, the two water injection layers are crossed, and the packer 5 between the layers is unqualified in setting.
Referring to fig. 2, an embodiment of the downhole packer seal testing method for the intelligent measurement and control water injection well in a specific water injection well is shown. The well requires 15MPa of injection pressure, 50 square/day injection in the first layer, 40 square/day injection in the second layer, 30 square/day injection in the third layer, and 120 square/day total flow in the whole well. After the well string is put into the well and the packer 5 is set (not tested), the pressure of the injected fluid is controlled and stabilized through the wellhead ground pressure stabilizing system 1, the flow data transmission instruction of the injected fluid is converted, all the downhole flow measurement and control valves 6 are opened, the seal test is needed after the flow distribution is realized according to the injection requirements (the total flow is 120 square/day, and the wellhead injection pressure is 15MPa), and whether the injected fluid of the layer flees into other layers is judged.
Firstly, opening a valve of the four-way joint of the ground casing, if no liquid flows out, indicating that the packer 5-1 is well set, and closing the four-way valve of the casing.
And then, transmitting an instruction by converting flow data of the injected fluid, closing the underground flow measurement and control valve 6-1, observing the flow value measured by the wellhead digital display flowmeter 2-4 after the pressure of the wellhead injected fluid is stable and the numerical value of the digital display pressure gauge 2-2 is 15MPa, if the data is more than 70 square/day, indicating that the packer 5-2 is not set or is not well set, and leaking between the water injection layer of the first layer and the water injection layer of the second layer, and if the data is 70 square/day, completely setting the packer 5-2.
The method comprises the steps of opening an underground flow measuring and controlling valve 6-1 and closing the underground flow measuring and controlling valve 6-3 by converting a flow data transmission instruction of injected fluid, observing a flow value measured by an underground digital display flowmeter 2-4 after the pressure of the injected fluid at a well head is stable and the numerical value of the digital display pressure gauge 2-2 is 15MPa, if the data is more than 90 square/day, indicating that a packer 5-3 is not set or is not well set, and leaking between a two-layer water injection layer and a three-layer water injection layer, and if the data shows 90 square/day, completely setting the packer 5-3.
Further verification: the method comprises the steps of opening a downhole flow measuring and controlling valve 6-3 and closing the downhole flow measuring and controlling valve 6-2 by converting a flow data transmission instruction of injected fluid, observing a flow value measured by a wellhead digital display flowmeter 2-4 after the pressure of the wellhead injected fluid is stable and the numerical value of the digital display pressure gauge 2-2 is 15MPa, if the data is more than 80 square/day, indicating that a packer 5-2 or 5-3 is not set or is not well set, and indicating that a water injection layer and a water injection layer are leaked or a water injection layer and a water injection layer are leaked, and if the data shows 80 square/day, the packer 5-2 and the packer 5-3 are both well set.
The method for testing the seal of the underground packer based on the wellhead water injection pressure stabilizing facility and the wireless measurement and control intelligent water distributor technology has the characteristics of simple process, visual data and accurate judgment.
Although embodiments of the present invention have been shown and described in the description of the present invention, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides an intelligence is observed and controled water injection well packer and is tested sealing device in pit, includes the water injection tubular column, set up the packer on the water injection tubular column, well head oil pipe cross is connected to water injection tubular column upper end, its characterized in that still includes digital display manometer, flow valve, digital display flowmeter, well head steady voltage system, the export of digital display manometer import intercommunication well head steady voltage system, well head steady voltage system export intercommunication water pipe, the export of digital display manometer intercommunication flow valve is imported, and the import of flow valve export intercommunication digital display flowmeter, the export of digital display flowmeter intercommunication well head oil pipe cross.
2. The device of claim 1, further comprising a data wireless transceiver, wherein the data wireless transceiver is connected with a digital display flow meter and a digital display pressure meter in a wireless signal mode respectively.
3. The device of claim 2, wherein the downhole water injection string comprises an oil pipe, and at least two packers and at least two downhole flow measurement and control valves disposed on the oil pipe, the packers separating the downhole flow measurement and control valves from each other so that each downhole flow measurement and control valve corresponds to a respective water injection layer.
4. An intelligent measurement and control method for testing the sealing of the underground packer of a water injection well is characterized in that after each layer of packer is sealed, the water injection valve is opened for water injection, the ground pressure stabilizing system controls the injection pressure of the whole water injection well, underground flow data is formed by adjusting a water nozzle of the flow valve, the underground flow measuring and controlling valves of each layer recognize and receive flow data instructions, the water nozzle is opened or transmission data is collected, when a certain layer of underground flow measurement and control valve water nozzle is opened, the numerical value of the ground digital display pressure gauge and the numerical value of the digital display flow meter are recorded, then the other layer of underground flow measurement and control valve water nozzle is opened through a wellhead conversion flow numerical value instruction, after the pressure of the fluid injected into the wellhead is stable and the numerical value of the digital display pressure meter which is just recorded is recovered, the numerical value of the flow measured by the wellhead digital display flow meter is observed, and if the data is basically unchanged or the data is not changed greatly, the two water injection layers are subjected to layer crossing, and the setting of each packer between the two layers is unqualified.
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| CN201811186557.3A CN111042760A (en) | 2018-10-11 | 2018-10-11 | Seal testing device and method for underground packer of intelligent measurement and control water injection well |
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| CN201811186557.3A CN111042760A (en) | 2018-10-11 | 2018-10-11 | Seal testing device and method for underground packer of intelligent measurement and control water injection well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113669047A (en) * | 2021-07-08 | 2021-11-19 | 中石化石油工程技术服务有限公司 | High-temperature high-pressure oil and gas well testing device and method |
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