CN110388203B - High-temperature geothermal well water pressure testing well system and method - Google Patents
High-temperature geothermal well water pressure testing well system and method Download PDFInfo
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- CN110388203B CN110388203B CN201910740686.0A CN201910740686A CN110388203B CN 110388203 B CN110388203 B CN 110388203B CN 201910740686 A CN201910740686 A CN 201910740686A CN 110388203 B CN110388203 B CN 110388203B
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 47
- 235000020681 well water Nutrition 0.000 title claims description 15
- 239000002349 well water Substances 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 238000009834 vaporization Methods 0.000 claims description 7
- 230000008016 vaporization Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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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
- E21B47/00—Survey of boreholes or wells
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- 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)
- Geophysics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a water pressure testing well system and a water pressure testing well method for a high-temperature geothermal well, wherein the system comprises the following steps: the system comprises a four-way valve, a high-temperature deep well pump, an industrial personal computer and valves respectively positioned on four pipelines of the four-way valve; wherein: the industrial personal computer is respectively connected with the valve and the high-temperature deep well pump in a control way; the first pipeline and the second pipeline of the four-way valve are vertically communicated, and the third pipeline and the fourth pipeline are transversely communicated; the valve on the first pipeline of the four-way valve is a hydraulic wellhead valve, and the hydraulic wellhead valve is connected with a wellhead of the high-temperature geothermal well through a flange or threads; the valve on the second pipeline of the four-way valve is a hydraulic well closing valve; the third pipeline of the four-way valve is a measurement data pipeline; and a fourth pipeline of the four-way valve is a well control pipeline. The system can realize remote control of the water test and well killing process, can automatically measure and store related data in the water test process and the well killing process, does not need manual measurement, and reduces labor intensity; the accuracy of the measured data is improved, the safety coefficient is high, and safety accidents can be prevented.
Description
Technical Field
The invention relates to the field of high-temperature geothermal well exploration, in particular to a high-temperature geothermal well water pressure testing well system and a method.
Background
Water testing is one of the important works of high-temperature geothermal well reserve calculation and productivity assessment. In the process of testing water of the high-temperature geothermal well, high-temperature hot water in the well quickly gushes out due to the fact that the pressure of liquid column in the well is reduced, and gushing and vaporization are easy to occur. At present, no special equipment for testing water of a high-temperature geothermal well exists, all parameters in the water testing process need to be measured manually, and the problems of large data error, high risk of high-temperature scalding and the like exist.
In addition, once gushing or vaporization occurs in the water test process, the hot water amount and the pressure value discharged by the high-temperature geothermal well cannot be measured, so that the reserve and the capacity of the geothermal well cannot be accurately calculated, and serious safety accidents can be caused.
How to solve the technical problems is a problem to be solved by the practitioners in the same class at present.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a high temperature geothermal well hydrostatic well system and method that overcomes or at least partially solves the above problems.
In a first aspect, an embodiment of the present invention provides a hydraulic pressure testing well system for a high-temperature geothermal well, including: the system comprises a four-way valve, a high-temperature deep well pump, an industrial personal computer and valves respectively positioned on four pipelines of the four-way valve;
wherein: the industrial personal computer is respectively connected with the valve and the high-temperature deep well pump in a control manner;
the high-temperature deep well pump is positioned in the wellhead of the high-temperature geothermal well and is used for extracting hot water in the well;
the first pipeline and the second pipeline of the four-way valve are vertically communicated, and the third pipeline and the fourth pipeline are transversely communicated;
the valve on the first pipeline of the four-way valve is a hydraulic wellhead valve, and the hydraulic wellhead valve is connected with a wellhead of the high-temperature geothermal well through a flange or threads;
the valve on the second pipeline of the four-way valve is a hydraulic well closing valve;
the third pipeline of the four-way valve is a measurement data pipeline; and a fourth pipeline of the four-way valve is a well control pipeline.
In one embodiment, the measurement data pipeline is sequentially provided with a pressure gauge, a hydraulic open-flow valve, a first flowmeter and a thermometer according to the water flow direction;
the pressure gauge, the hydraulic open flow valve, the first flowmeter and the thermometer are all connected with the industrial personal computer.
In one embodiment, the pressure gauge is a high temperature resistant pressure gauge.
In one embodiment, the first flow meter is a high temperature flow meter.
In one embodiment, the thermometer is a high temperature metal thermometer.
In one embodiment, the well killing pipeline is sequentially provided with a mud pump, a second flowmeter and a hydraulic well killing valve according to the flow direction of fluid in the pipeline;
and the slurry pump, the second flowmeter and the hydraulic well-killing valve are all connected with the industrial personal computer.
In a second aspect, the present invention further provides a method for testing a hydraulic pressure of a high-temperature geothermal well, where the hydraulic pressure testing system of the high-temperature geothermal well is used for testing water and killing the well;
the method comprises a water testing step and a well killing step: wherein the water testing step comprises the following steps:
the industrial personal computer sends a first control signal to control the valve on the pressure well pipeline to be closed,
the industrial personal computer sends a second control signal to control the opening of a valve on a measurement data pipeline, a hydraulic well closing valve and a hydraulic well opening valve;
the industrial personal computer sends a third control signal to control the high-temperature deep well pump to be started, and hot water in the well is pumped;
when hot water in the high-temperature geothermal well automatically gushes out in the water pumping process, the high-temperature deep well pump is lifted from the wellhead of the high-temperature geothermal well;
the industrial personal computer sends a fourth control signal to control the hydraulic shut-in valve to be closed, and hot water flows out of the measurement data pipeline;
and the industrial personal computer acquires corresponding measurement data from the measurement data pipeline to finish water test.
In one embodiment, the industrial personal computer obtains corresponding measurement data from the measurement data pipeline to complete water test, and the method comprises the following steps:
the industrial personal computer controls the opening degree of the hydraulic open-flow valve, acquires a wellhead pressure value from a pressure gauge on a measurement data pipeline, acquires flow data from a first flow meter and acquires temperature data from a thermometer;
and generating a fitting curve according to the pressure value, the flow data and the temperature data to finish water test.
In one embodiment, the step of killing includes:
in the water test process, when water burst out of control and high-temperature water vaporization occur, the industrial personal computer sends a fifth control signal to control the hydraulic open-flow valve to be closed and control the hydraulic well-killing valve on the well-killing pipeline to be opened;
the industrial personal computer sends a sixth control signal to control the slurry pump to be started, and cold water or flushing fluid is pumped into the wellhead of the high-temperature geothermal well through the hydraulic well-killing valve;
according to the wellhead pressure of the pressure gauge on the measurement data pipeline, the industrial personal computer sends a seventh control signal to control the opening degree of the hydraulic well-killing valve;
the industrial personal computer acquires wellhead pressure data of the pressure gauge and flow data of the second flow gauge in real time;
when the pressure data is restored to zero, the well killing is successful;
and controlling the slurry pump, the hydraulic well-killing valve and the hydraulic well-head valve to be closed, and ending well-killing.
The embodiment of the invention provides a water pressure testing well system for a high-temperature geothermal well, which comprises the following components: the system comprises a four-way valve, a high-temperature deep well pump, an industrial personal computer and valves respectively positioned on four pipelines of the four-way valve; the whole system can realize remote control of the water test and well killing process, can automatically measure and store related data in the water test process and well killing process, does not need manual measurement, and reduces labor intensity; the accuracy of the measured data is improved, potential safety hazards of personnel are avoided, the safety coefficient is high, and safety accidents can be prevented.
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 thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic structural diagram of a hydraulic well testing system for a high-temperature geothermal well according to an embodiment of the present invention.
Fig. 2 is a flow chart of a water testing step of the high-temperature geothermal well water testing well system according to an embodiment of the present invention.
Fig. 3 is a flow chart of a well control step of the high-temperature geothermal well water pressure testing well system according to an embodiment of the present invention.
In the accompanying drawings: 1. a slurry pump; 2. a second flowmeter; 3. a hydraulic well-killing valve; 4. a four-way joint; 5. a hydraulic shut-in valve; 6. a pressure gauge; 7. a hydraulic open-flow valve; 8. a first flowmeter; 9. a thermometer; 10. a geothermal well wellhead; 11. a high temperature deep well pump; 12. an industrial personal computer; 13 hydraulic wellhead valve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, a hydraulic pressure testing well system for a high-temperature geothermal well according to an embodiment of the present invention includes: the four-way valve comprises a four-way valve 4, a high-temperature deep well pump 11, an industrial personal computer 12 and valves respectively positioned on four pipelines of the four-way valve 4.
The industrial personal computer 12 is respectively connected with the valve and the high-temperature deep well pump 11 in a control way and is used for controlling the opening and closing of the valve and the opening and stopping of the high-temperature deep well pump 11. The main categories of the industrial personal computer are as follows: IPC (PC bus industrial computer), PLC (programmable control system), DCS (distributed control system), FCS (field bus system) and CNC (numerical control system), the embodiment of the invention is not limited to this.
The four-way valve 4 is in a cross shape, and an upper pipeline and a lower pipeline are respectively a first pipeline and a second pipeline which are communicated in the vertical direction; the two pipelines in the horizontal direction are a third pipeline and a fourth pipeline respectively.
In application, the valve on the first pipeline is called a hydraulic wellhead valve 13 and is connected with the high-temperature geothermal well wellhead 10 through a flange or threads; the high-temperature deep well pump 11 is put into the high-temperature geothermal well head 10 and is used for extracting hot water under the control of the industrial personal computer 12.
The valve on the second line is called the hydraulic shut-in valve 5, which is fully considered in the closed state in the case of non-water testing and well killing.
The third pipeline is used for measuring data, such as wellhead pressure, flow rate, temperature and the like, in the water test process, monitoring the change of the data in real time, and adopting corresponding measures can prevent gushing accidents. For example, when a water burst accident occurs, the well control treatment can be realized through the fourth pipeline.
The high-temperature geothermal well water pressure testing well system provided by the embodiment of the invention can realize remote control of water testing and well killing processes, can automatically measure and store related data in the water testing process and the well killing process, does not need manual measurement, and reduces labor intensity; the accuracy of the measured data is improved, potential safety hazards of personnel are avoided, the safety coefficient is high, and safety accidents can be prevented.
In one embodiment, the measuring data pipeline is sequentially provided with a pressure gauge 6, a hydraulic open-flow valve 7, a first flowmeter 8 and a thermometer 9 according to the water flow direction; all the components are connected with the industrial personal computer 12; the industrial personal computer can acquire pressure value, flow data and temperature data in real time and sequentially control the opening and closing of other valves.
The pressure gauge 6 can be a high-temperature-resistant pressure gauge, all parts of the high-temperature-resistant pressure gauge are made of stainless steel materials, and the high-temperature-resistant pressure gauge has an excellent corrosion-resistant function and can be suitable for mediums with high corrosivity.
The first flowmeter 8 may be a high-temperature flowmeter, and a high-temperature flowmeter of a suitable type may be selected according to the estimated temperature of the specific thermal well. For example: the thermometer measurement categories include: a high temperature measurement range of 1500-2000 ℃, a measurement range of 500-1000 ℃, a measurement range of 400-500 ℃, and the like.
The flow meter also defines different high temperature ranges depending on the principle and the design. For example, the differential pressure flow meter for the throttle mechanism is about 540 ℃, the positive displacement flow meter is about 200 ℃, and the area flow meter is about 400 ℃. The flowmeter sensor is not contacted with the measured medium, no part wear exists, and the use is safe and reliable.
The thermometer can be a high-temperature metal thermometer, such as WSSXN series vibration-resistant electric contact bimetallic thermometer, can directly measure liquid and steam within the range of-80 ℃ to +500 ℃, and can meet the temperature measurement requirement of a geothermal well.
Taking a high-temperature geothermal well water test process as an example:
first, the hydraulic wellhead valve 13 is connected with the high-temperature geothermal well wellhead 10 by a flange or screw threads.
And the hydraulic well-killing valve 3 is controlled to be closed, the hydraulic well-closing valve 5 is opened, the hydraulic open-flow valve 7 is opened, and the hydraulic well-head valve 13 is opened through a data acquisition control system of the industrial personal computer 12.
The high-temperature deep well pump 11 is put into the high-temperature geothermal well head 10, and the high-temperature deep well pump 11 is started to pump water through a data acquisition control system of the industrial personal computer 12. In the pumping process, the hot water in the high-temperature geothermal well can automatically gush out along with the increase of the temperature and the decrease of the pressure in the well.
When the hot water in the high-temperature geothermal well is automatically flushed, the high-temperature deep well pump 11 is pulled out from the high-temperature geothermal well wellhead 10.
And the hydraulic shut-in valve 5 is controlled to be closed by a data acquisition control system of the industrial personal computer 12, and hot water in the high-temperature geothermal well is discharged through the hydraulic open-flow valve 7. The opening of the hydraulic open flow valve 7 can be controlled by a data acquisition control system of the industrial personal computer 12, so that the hot water discharge flow in the high-temperature geothermal well is controlled; the pressure of the wellhead can be measured through the high temperature resistant pressure gauge 6; the flow rate of the hot water discharged from the high-temperature geothermal well can be measured through a flowmeter 8; the temperature of hot water discharged from the high-temperature geothermal well can be measured by a thermometer 9; the data acquisition control system of the industrial personal computer 12 can acquire and store wellhead pressure, flow and temperature data measured by the high temperature resistant pressure gauge 6, the high temperature resistant flowmeter 8 and the high temperature metal thermometer 9.
After the pressure, flow and temperature data of the hot water wellhead discharged by the high-temperature geothermal well are obtained, the hydraulic wellhead valve 13 and the hydraulic blowout valve 7 are controlled to be closed by a data acquisition control system of the industrial personal computer 12, and the water testing process is finished.
The wellhead pressure, flow, temperature value and curve of hot water discharged by the high-temperature geothermal well can be output through the data acquisition control system of the industrial personal computer 12, and the reserves and the productivity of the high-temperature geothermal well can be obtained through calculation.
In one embodiment, referring to fig. 1, in the fourth line of the four-way, namely: the well-killing pipeline is sequentially provided with a slurry pump 1, a second flowmeter 2 and a hydraulic well-killing valve 3 according to the flow direction of fluid in the pipeline;
wherein, the slurry pump 1, the second flowmeter 2 and the hydraulic well-killing valve 3 are all connected with the industrial personal computer 12. In the well killing process, the industrial personal computer 12 can control the mud pump 1 to perform well killing operation and can acquire flow data of well killing filling fluid.
In this embodiment, when a kick overflow occurs, a drilling fluid column pressure needs to be re-established in the well to balance the formation pressure, and a well control method is usually adopted to prevent the blowout, such as pumping cold water or high-density flushing fluid, for example, slurry with higher density.
The second flowmeter 2 is used for measuring cold water or high-density flushing liquid, so that the range of selectable types is larger than that of the first flowmeter.
Taking a high-temperature geothermal well killing process as an example:
in the process of testing water of the high-temperature geothermal well, water burst out of control and high-temperature water vaporization are likely to occur, and serious safety accidents can be caused if the water burst out of control is not controlled. Timely well killing is needed to avoid accidents.
In the process of testing water of the high-temperature geothermal well, the hydraulic well-killing valve 3 is in a closed state, the hydraulic well-closing valve 5 is in a closed state, the hydraulic open-flow valve 7 is in an open state, and high-temperature hot water in the high-temperature geothermal well is discharged from the hydraulic open-flow valve 7.
When water burst out of control and high-temperature water vaporization occur, the hydraulic open-flow valve 7 is closed and the hydraulic well-killing valve 3 is opened by the data acquisition control system of the industrial personal computer 12.
The mud pump 1 is started by the data acquisition control system of the industrial personal computer 12, and cold water or high-density flushing fluid can be pumped into the high-temperature geothermal well mouth 10 through the hydraulic well-killing valve 3 after the mud pump 1 is started, so that cooling and well-killing are realized.
The opening of the hydraulic well-killing valve 3 can be controlled by a data acquisition control system of the industrial personal computer 12, so that the flow of cold water or high-density flushing fluid is controlled; the wellhead pressure can be measured by the pressure gauge 6; the flow rate of cold water or high-density flushing fluid pumped into the high-temperature geothermal well head 10 can be measured by the second flowmeter 2; wellhead pressure and flow data measured by the pressure gauge 6 and the second flow gauge 2 can be collected and stored by a data collection control system of the industrial personal computer 12.
The wellhead pressure is read by the data acquisition control system of the industrial personal computer 12, and when the wellhead pressure is restored to zero, the well killing is successful. The mud pump 1 is closed, the hydraulic well-killing valve 3 is closed, the hydraulic well-head valve 13 is closed, and the well-killing process is finished through a data acquisition control system of the industrial personal computer 12.
The high-temperature geothermal well water pressure testing well system provided by the embodiment of the invention comprises:
1. the remote control of the water test and well control process can be realized, the operation is simple, the labor intensity is low, and the safety coefficient is high.
2. The system can automatically measure and store wellhead pressure, flow and temperature data in the water test process, does not need manual measurement, reduces labor intensity, improves data accuracy, and does not have personnel safety hidden trouble.
3. When a gushing accident occurs, manual remote quick well closing and well killing can be realized, and safety accidents are prevented.
Based on the same inventive concept, the embodiment of the invention also provides a high-temperature geothermal well water pressure testing well method, and because the principle of the method for solving the problem is similar to the working process of the high-temperature geothermal well water pressure testing well system, the implementation of the method can be referred to the implementation of the system, and the repetition is omitted.
In a second aspect, the present invention further provides a high-temperature geothermal well water pressure testing method, where the high-temperature geothermal well water pressure testing system provided by the above embodiment is used to test water and kill a well; the method comprises a water test step and a well control step.
Wherein the water testing step, referring to fig. 2, comprises:
s21, the industrial personal computer sends a first control signal to control the valve on the pressure well pipeline to be closed;
s22, the industrial personal computer sends a second control signal to control the opening of a valve, a hydraulic well closing valve and a hydraulic well mouth valve on a measurement data pipeline;
s23, the industrial personal computer sends a third control signal to control the high-temperature deep well pump to be started, and hot water in the well is pumped;
s24, when hot water in the high-temperature geothermal well automatically gushes out in the water pumping process, the high-temperature deep well pump is lifted out from the wellhead of the high-temperature geothermal well;
s25, the industrial personal computer sends a fourth control signal to control the hydraulic shut-in valve to be closed, and hot water flows out from the measurement data pipeline;
s26, the industrial personal computer acquires corresponding measurement data from the measurement data pipeline to finish water test.
In one embodiment, step S26 specifically includes: the industrial personal computer controls the opening degree of the hydraulic open flow valve, acquires a wellhead pressure value from a pressure gauge on a measurement data pipeline, acquires flow data from a first flowmeter, and acquires temperature data from a thermometer; and generating a fitting curve according to the pressure value, the flow data and the temperature data to finish water test.
In one embodiment, the well killing step, as shown in fig. 3, includes:
s31, in the water test process, when water burst out of control and high-temperature water vaporization occur, the industrial personal computer sends a fifth control signal to control the hydraulic open-flow valve to be closed and control the hydraulic well-killing valve on the well-killing pipeline to be opened;
s32, the industrial personal computer sends a sixth control signal to control the slurry pump to be started, and cold water or flushing fluid is pumped into the wellhead of the high-temperature geothermal well through the hydraulic well-killing valve;
s33, according to the wellhead pressure of the pressure gauge on the measurement data pipeline, the industrial personal computer sends a seventh control signal to control the opening degree of the hydraulic well-killing valve;
s34, the industrial personal computer acquires wellhead pressure data of the pressure gauge and flow data of a second flow meter in real time;
s35, when the pressure data is restored to zero, the well killing is successful;
and S36, controlling the slurry pump, the hydraulic well-killing valve and the hydraulic well-head valve to be closed, and ending well-killing.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. A high temperature geothermal well hydrostatic testing well system, comprising: the four-way valve comprises a four-way valve (4), a high-temperature deep well pump (11), an industrial personal computer (12) and valves respectively positioned on four pipelines of the four-way valve;
wherein: the industrial personal computer (12) is respectively connected with the valve and the high-temperature deep well pump (11) in a control manner;
the high-temperature deep well pump (11) is positioned in the high-temperature geothermal well head (10) and is used for extracting hot water in the well;
the first pipeline and the second pipeline of the four-way valve are vertically communicated, and the third pipeline and the fourth pipeline are transversely communicated;
the valve on the first pipeline of the four-way valve is a hydraulic wellhead valve (13), and the hydraulic wellhead valve (13) is connected with a high-temperature geothermal well wellhead (10) through a flange or threads;
the valve on the second pipeline of the four-way valve is a hydraulic well closing valve (5);
the third pipeline of the four-way valve is a measurement data pipeline; the fourth pipeline of the four-way valve is a well control pipeline;
the measuring data pipeline is sequentially provided with a pressure gauge (6), a hydraulic open-flow valve (7), a first flowmeter (8) and a thermometer (9) according to the water flow direction;
the pressure gauge (6), the hydraulic open flow valve (7), the first flowmeter (8) and the thermometer (9) are all connected with the industrial personal computer (12);
the well killing pipeline is sequentially provided with a slurry pump (1), a second flowmeter (2) and a hydraulic well killing valve (3) according to the flow direction of fluid in the pipeline;
the slurry pump (1), the second flowmeter (2) and the hydraulic well-killing valve (3) are all connected with the industrial personal computer (12).
2. A high temperature geothermal well water pressure testing well system according to claim 1, characterized in that the pressure gauge (6) is a high temperature resistant pressure gauge.
3. A high temperature geothermal well hydrostatic well system according to claim 1, wherein the first flowmeter (8) is a high temperature flowmeter.
4. A high temperature geothermal well test water pressure well system according to claim 1, characterized in that the thermometer (9) is a high temperature metal thermometer.
5. A high temperature geothermal well water pressure testing well method, characterized in that the high temperature geothermal well water pressure testing well system as claimed in any one of claims 1-4 is used for water testing and well killing;
the method comprises a water testing step and a well killing step: wherein the water testing step comprises the following steps:
the industrial personal computer sends a first control signal to control the valve on the pressure well pipeline to be closed;
the industrial personal computer sends a second control signal to control the opening of a valve on a measurement data pipeline, a hydraulic well closing valve and a hydraulic well opening valve;
the industrial personal computer sends a third control signal to control the high-temperature deep well pump to be started, and hot water in the well is pumped;
when hot water in the high-temperature geothermal well automatically gushes out in the water pumping process, the high-temperature deep well pump is lifted from the wellhead of the high-temperature geothermal well;
the industrial personal computer sends a fourth control signal to control the hydraulic shut-in valve to be closed, and hot water flows out of the measurement data pipeline;
and the industrial personal computer acquires corresponding measurement data from the measurement data pipeline to finish water test.
6. The method of claim 5, wherein the industrial personal computer obtains corresponding measurement data from the measurement data pipeline to complete the water test, comprising:
the industrial personal computer controls the opening degree of the hydraulic open-flow valve, acquires a wellhead pressure value from a pressure gauge on a measurement data pipeline, acquires flow data from a first flow meter and acquires temperature data from a thermometer;
and generating a fitting curve according to the pressure value, the flow data and the temperature data to finish water test.
7. The method of claim 6, wherein the step of killing comprises:
in the water test process, when water burst out of control and high-temperature water vaporization occur, the industrial personal computer sends a fifth control signal to control the hydraulic open-flow valve to be closed and control the hydraulic well-killing valve on the well-killing pipeline to be opened;
the industrial personal computer sends a sixth control signal to control the slurry pump to be started, and cold water or flushing fluid is pumped into the wellhead of the high-temperature geothermal well through the hydraulic well-killing valve;
according to the wellhead pressure of the pressure gauge on the measurement data pipeline, the industrial personal computer sends a seventh control signal to control the opening degree of the hydraulic well-killing valve;
the industrial personal computer acquires wellhead pressure data of the pressure gauge and flow data of the second flow gauge in real time;
when the pressure data is restored to zero, the well killing is successful;
and controlling the slurry pump, the hydraulic well-killing valve and the hydraulic well-head valve to be closed, and ending well-killing.
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| CN111852455B (en) * | 2020-08-27 | 2023-08-01 | 中石化绿源地热能(陕西)开发有限公司 | High-temperature high-pressure self-injection geothermal well killing device and method |
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| CN205876264U (en) * | 2016-05-19 | 2017-01-11 | 建湖县鸿达阀门管件有限公司 | Vertical remote control killing manifold that throttles |
| CN207296944U (en) * | 2017-08-22 | 2018-05-01 | 陕西省煤田地质集团有限公司 | A kind of pressure control device of docking style geothermal well |
| CN210370613U (en) * | 2019-08-12 | 2020-04-21 | 北京探矿工程研究所 | High-temperature geothermal well water testing well killing system |
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| CN205876264U (en) * | 2016-05-19 | 2017-01-11 | 建湖县鸿达阀门管件有限公司 | Vertical remote control killing manifold that throttles |
| CN207296944U (en) * | 2017-08-22 | 2018-05-01 | 陕西省煤田地质集团有限公司 | A kind of pressure control device of docking style geothermal well |
| CN210370613U (en) * | 2019-08-12 | 2020-04-21 | 北京探矿工程研究所 | High-temperature geothermal well water testing well killing system |
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