CN110630231A - Full-automatic foam drainage gas production device and foam drainage gas production method - Google Patents
Full-automatic foam drainage gas production device and foam drainage gas production method Download PDFInfo
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- CN110630231A CN110630231A CN201910959907.3A CN201910959907A CN110630231A CN 110630231 A CN110630231 A CN 110630231A CN 201910959907 A CN201910959907 A CN 201910959907A CN 110630231 A CN110630231 A CN 110630231A
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- 239000006260 foam Substances 0.000 title claims abstract description 150
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 96
- 239000004088 foaming agent Substances 0.000 claims abstract description 78
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims description 122
- 239000007789 gas Substances 0.000 claims description 44
- 238000002347 injection Methods 0.000 claims description 41
- 239000007924 injection Substances 0.000 claims description 41
- 239000012530 fluid Substances 0.000 claims description 39
- 238000009825 accumulation Methods 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 9
- 238000010295 mobile communication Methods 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 5
- 239000004620 low density foam Substances 0.000 claims description 4
- 238000005191 phase separation Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
-
- 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
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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)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention relates to the technical field of foam drainage gas production, in particular to a full-automatic foam drainage gas production device and a foam drainage gas production method. According to the invention, the coiled tubing is lowered to the bottom of the well, the foaming agent is injected quantitatively according to the gas well detection pressure, and the defoaming agent is injected according to the foam condition of the three-phase separator.
Description
Technical Field
The invention relates to the technical field of foam drainage gas production, in particular to a full-automatic foam drainage gas production device and a foam drainage gas production method.
Background
After a gas well is produced for a period of time, liquid accumulation and sand production problems of a certain degree are generated, the problems of water logging, blockage and the like of the gas well are caused, the yield is influenced, and even the gas well is stopped. In order to enable the gas well to continue to produce, a foaming agent is added into a shaft of the gas well, and the foaming agent and the accumulated liquid at the bottom of the well are mixed to generate a large amount of low-density foam under the stirring action of natural gas flow, so that the relative density of the accumulated liquid in the shaft is reduced, the foam containing a large amount of accumulated liquid is carried out of the shaft along with the natural gas, the accumulated liquid at the bottom of the well is discharged, and the purpose of improving the yield of the gas well is.
Most of the currently used foam discharging processes are periodically injecting foaming agents and defoaming agents, the injection of the defoaming agents and the foaming agents is determined, the phenomenon of medicament waste exists, gas well flooding is caused by untimely foaming agent injection, and the defoaming agent injection is caused to cause that bubbles enter a downstream pipe network to cause heavy loss. In addition, a great deal of manpower is required for construction and maintenance.
Disclosure of Invention
The invention provides a full-automatic foam drainage gas production device and a foam drainage gas production method, overcomes the defects of the prior art, and can effectively solve the problems that the prior foam drainage gas production process is easy to cause flooding of a gas well due to untimely foaming agent injection, and causes great loss of bubbles entering a downstream pipe network due to untimely defoaming agent injection.
One of the technical schemes of the invention is realized by the following measures: a full-automatic foam discharging gas production device comprises a foaming agent tank, a defoaming agent tank, a three-phase separator and a master control unit, wherein a foaming agent injection pipeline is fixedly communicated with a liquid outlet at the lower part of the foaming agent tank, a first flow detection element, a first pneumatic switch and a first fluid conveying device are connected in series with the foaming agent injection pipeline, and a continuous oil pipe is fixedly communicated with a liquid outlet of the foaming agent injection pipeline; a liquid drainage pipeline is fixedly communicated with a liquid inlet of the three-phase separator, a foam height detection element for detecting the foam height in the three-phase separator is arranged on the three-phase separator, an antifoaming agent injection pipeline is fixedly communicated between the liquid drainage pipeline and a liquid outlet at the lower part of the antifoaming agent tank, and a second flow detection element, a second pneumatic switch and a second fluid conveying device are connected in series on the antifoaming agent injection pipeline; the first flow detection element, the first pneumatic switch, the first fluid conveying device, the second flow detection element, the second pneumatic switch and the second fluid conveying device are respectively and electrically connected with the master control unit; the bottom of the continuous oil pipe is fixedly communicated with an intelligent dosing joint, a liquid accumulation detection element for detecting the liquid accumulation at the bottom of the well is arranged on the intelligent dosing joint, and the liquid accumulation detection element is electrically connected with a master control unit.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the intelligent dosing connector is also provided with a check valve, a liquid accumulation detection element for detecting the liquid accumulation at the bottom of the well adopts a first pressure sensor, and the first pressure sensor is electrically connected with the master control unit; or/and the foam height detection element adopts a CTS-PM type foam height controller, and the CTS-PM type foam height controller is electrically connected with the master control unit; alternatively, the foam height detecting element is a foam height measuring instrument.
The foaming agent tank is provided with a first temperature detection element, a first heat tracing band is arranged on the outer side of the foaming agent tank, and the master control unit is electrically connected with the control input end of the first heat tracing band and the first temperature detection element respectively; a second temperature detection element is arranged on the defoaming agent tank, a second heat tracing band is arranged on the outer side of the defoaming agent tank, and the master control unit is electrically connected with the control input end of the second heat tracing band and the second temperature detection element respectively; the foaming agent tank is provided with a first liquid level detection element, the defoaming agent tank is provided with a second liquid level detection element, and the master control unit is electrically connected with the first liquid level detection element and the second liquid level detection element respectively.
The first fluid conveying device adopts a first metering pump, the second fluid conveying device adopts a second metering pump, a first pressure sensor is arranged at the outlet end of the first metering pump, a second pressure sensor is arranged at the outlet end of the second metering pump, and the first pressure sensor and the second pressure sensor are respectively and electrically connected with the master control unit; a stirring device is arranged on the foaming agent tank, and the motor control end of the stirring device is electrically connected with the master control unit; the display module is a touch display, and the touch display is electrically connected with the master control unit; the master control unit is provided with a communication module, and the communication module is in communication connection with the mobile terminal by adopting a 4G mobile communication network or a 5G mobile communication network and the like; the mobile terminal is connected with the master control unit through the WIFI module.
The second technical scheme of the invention is realized by the following measures: one of the technical schemes is that the foam drainage gas production method of the full-automatic foam drainage gas production device is carried out according to the following method: the coiled tubing is put into a well, the bottom end of the coiled tubing extends into the bottom of a gas well, the liquid inlet end of a liquid discharge pipeline is communicated with a well head, a liquid accumulation detection element not only collects data of liquid accumulation in the well, but also sends the collected data of the liquid accumulation to a master control unit, the master control unit determines the injection amount of a foaming agent according to the data of the liquid accumulation in the well, then the master control unit gives a signal for opening a first pneumatic switch and starting a first fluid conveying device so as to inject a required amount of the foaming agent into the well, the injection amount of the foaming agent is monitored by a first flow detection element, a large amount of low-density foam generated under the stirring action of natural gas flow after the foaming agent is mixed with the liquid accumulation in the well bottom enters a three-phase separator through the liquid discharge pipeline to carry out three-phase separation, a foam height detection element collects the foam height data in the three-phase separator and compares the foam height, and the total control unit gives signals of whether to inject the defoaming agent and the injection amount according to the comparison result.
The following is further optimization or/and improvement of the second technical scheme of the invention:
when the foam height data is not less than the foam height upper limit value, the master control unit gives a signal for turning on the second pneumatic switch and starting the second fluid conveying device so as to inject the defoaming agent, and when the foam height data is not more than the foam height lower limit value, the master control unit gives a signal for turning off the second pneumatic switch and stopping the second fluid conveying device so as to stop injecting the defoaming agent.
The foam height detection element adopts a CTS-PM type foam height controller, when the CTS-PM type foam height controller sets a foam height upper limit value and a foam height lower limit value, the CTS-PM type foam height controller not only collects foam height data in the three-phase separator in real time, but also can compare the foam height data with the foam height upper limit value and the foam height lower limit value, and sends a comparison result to the master control unit, and then the master control unit controls the injection of a defoaming agent; or the foam height detection element adopts a CTS-PM type foam height controller, the CTS-PM type foam height controller only collects foam height data in the three-phase separator in real time and sends the collected foam height data to the master control unit, when the foam height data is not less than the upper limit value of the foam height, the master control unit gives signals for turning on the second pneumatic switch and starting the second fluid conveying device so as to inject the defoaming agent, and when the foam height data is not more than the lower limit value of the foam height, the master control unit gives signals for turning off the second pneumatic switch and stopping the second fluid conveying device so as to stop injecting the defoaming agent.
The main control unit sets the lower limit value and the upper limit value of the temperature of the foaming agent tank and the defoaming agent tank, the first temperature detection element and the second temperature detection element acquire the temperature data of the foaming agent tank and the defoaming agent tank corresponding to each other in real time, the temperature data are sent to the main control unit and are compared with the temperature set value of the main control unit, and temperature control is carried out according to the comparison result; setting the lower limit values of the liquid levels of the foaming agent tank and the defoaming agent tank in the master control unit, acquiring the liquid level data of the respective foaming agent tank in real time by using the first liquid level detection element and the second liquid level detection element, sending the liquid level data to the master control unit, comparing the liquid level data with the set value of the liquid level of the master control unit, and controlling the liquid level according to the comparison result; and the main control unit sets the upper pressure limit values of the first metering pump and the second metering pump, compares the pressure data acquired by the first pressure sensor and the second pressure sensor with the corresponding upper pressure limit set values, and controls the running states of the first metering pump and the second metering pump according to the comparison result.
According to the invention, the coiled tubing is lowered to the bottom of the well, the foaming agent is injected quantitatively according to the gas well detection pressure, and the defoaming agent is injected according to the foam condition of the three-phase separator, so that compared with the conventional foam discharging, the artificial subjective judgment in the past is avoided, the medicament can be greatly saved, the medicament cost is reduced, in addition, a large amount of foaming agent and defoaming agent are prevented from entering, and the influence of excessive foaming agent and defoaming agent on the subsequent coagulation emulsification and water treatment is effectively relieved; due to automatic control, the probability of serious loss caused by flooding of a gas well due to untimely foaming agent injection and entering of bubbles into a downstream pipe network due to untimely defoaming agent injection is greatly reduced, and full-automatic foam discharging, cost reduction and efficiency improvement are realized.
Drawings
FIG. 1 is a process diagram of the present invention.
The codes in the figures are respectively: the system comprises a foaming agent tank 1, a defoaming agent tank 2, a three-phase separator 3, a master control unit 4, a foaming agent injection pipeline 5, a first flow detection element 6, a first pneumatic switch 7, a coiled tubing 8, a liquid discharge pipeline 9, a foam height detection element 10, a defoaming agent injection pipeline 11, a second flow detection element 12, a second pneumatic switch 13, a first temperature detection element 14, a first heat tracing band 15, a second temperature detection element 16, a second heat tracing band 17, a first liquid level detection element 18, a second liquid level detection element 19, a first metering pump 20, a second metering pump 21, a stirrer 22, a gas well 23 and an intelligent dosing connector 24.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, back, up, down, left, right, etc. is determined according to the layout direction of fig. 1 of the specification, and in the present invention, the detecting element and the controller are all the instruments and devices which are well known and commonly used in the prior art, for example, the flow rate detecting element is a flow meter.
The invention is further described with reference to the following examples and figures:
as shown in the attached figure 1, the full-automatic foam discharging and gas producing device comprises a foaming agent tank 1, a defoaming agent tank 2, a three-phase separator 3 and a master control unit 4, wherein a foaming agent injection pipeline 5 is fixedly communicated with a liquid outlet at the lower part of the foaming agent tank 1, a first flow detection element 6, a first pneumatic switch 7 and a first fluid conveying device are connected in series on the foaming agent injection pipeline 5, and a continuous oil pipe 8 is fixedly communicated with a liquid outlet of the foaming agent injection pipeline 5; a liquid drainage pipeline 9 is fixedly communicated with a liquid inlet of the three-phase separator 3, a foam height detection element 10 for detecting the foam height in the three-phase separator 3 is arranged on the three-phase separator 3, an antifoaming agent injection pipeline 11 is fixedly communicated between the liquid drainage pipeline 9 and a liquid outlet at the lower part of the antifoaming agent tank 2, and a second flow detection element 12, a second pneumatic switch 13 and a second fluid conveying device are connected in series on the antifoaming agent injection pipeline 11; the first flow detection element 6, the first pneumatic switch 7, the first fluid conveying device, the second flow detection element 12, the second pneumatic switch 13 and the second fluid conveying device are respectively electrically connected with the master control unit 4; the bottom of the continuous oil pipe 8 is fixedly communicated with an intelligent dosing joint 24, a liquid accumulation detection element used for detecting the liquid accumulation amount at the bottom of the well is arranged on the intelligent dosing joint 24, and the liquid accumulation detection element is electrically connected with the master control unit 4.
When the device is applied to foam drainage gas production, the coiled tubing 8 of the device is put into a well, the bottom end of the coiled tubing 8 extends into the bottom of the gas well 23, and the liquid inlet end of the liquid drainage pipeline 9 is communicated with the well head. According to the amount of the accumulated liquid in the well, the master control unit 4 determines the injection amount of the foaming agent, then the master control unit 4 gives a signal that the first pneumatic switch 7 is turned on and the first fluid conveying device is started so as to inject the foaming agent into the well, the injection amount of the foaming agent is monitored by the first flow detection element 6, a large amount of low-density foam generated under the stirring action of natural gas flow after the foaming agent is mixed with accumulated liquid in the well bottom enters the three-phase separator 3 through the liquid discharge pipeline 9 to be subjected to three-phase separation, and each phase after the three-phase separation is discharged out of the three-phase separator 3 through a corresponding outlet of the three-phase separator 3.
When the foam height detection element 10 monitors that the foam height is not smaller than the upper limit of the foam height set value, the master control unit 4 gives signals for turning on the second pneumatic switch 13 and starting the second fluid conveying device so as to inject the defoaming agent into the gas well 23, monitors the injection amount of the foaming agent through the second flow detection element 12, and when the foam height detection element 10 monitors that the foam height is not larger than the lower limit of the foam height set value, the master control unit 4 gives signals for turning off the valve of the second pneumatic switch 13 and stopping the second fluid conveying device so as to stop injecting the defoaming agent into the gas well 23.
According to the working process, the adding amount of the foaming agent is controlled by the liquid accumulation amount at the bottom of the well, the injection amount of the defoaming agent is controlled by the foam height in the three-phase separator 3, and through the cooperation of the master control unit 4, the foam height detection element 10, the first flow detection element 6, the first pneumatic switch 7, the first fluid conveying device, the second flow detection element 12, the second pneumatic switch 13 and the second fluid conveying device, the full-automatic foam discharging control is achieved, the operations of the foaming agent and the defoaming agent are responded in time, so that the unattended operation is realized, the labor cost is saved, the use cost of the medicament can be greatly reduced, and the adverse effects of excessive foaming agent on the subsequent condensation emulsification and water treatment are effectively relieved.
In practice, a valve may be provided in the drain line 9 between the second fluid supply and the three-phase separator 3.
The full-automatic foam-exhaust gas production device can be further optimized or/and improved according to actual needs:
as shown in the attached drawing 1, a check valve is further arranged on the intelligent dosing joint 24, a liquid accumulation detection element for detecting the amount of liquid accumulated at the bottom of the well adopts a first pressure sensor, and the first pressure sensor is electrically connected with the master control unit 4; or/and the foam height detection element 10 adopts a CTS-PM type foam height controller which is electrically connected with the master control unit 4; alternatively, the foam height detecting element 10 employs a foam height measuring instrument.
When the first pressure sensor is adopted to measure the pressure of the accumulated liquid, the depth h of the accumulated liquid in the well can be obtained according to a liquid pressure formula P = rho gh, P is the pressure (Pa) of the accumulated liquid, and rho is the density (kg/m) of the accumulated liquid3) G is the gravity acceleration of 9.8N/kg, h is the depth (m) of the accumulated liquid, the amount of the accumulated liquid in the well is obtained according to the depth of the accumulated liquid and the width of the well, and the injection amount of the foaming agent is confirmed according to the amount of the accumulated liquid.
When the total control unit 4 sets the upper limit value and the lower limit value of the pressure of the accumulated liquid in the well, and the first pressure sensor collects the pressure data of the accumulated liquid in the well and is not smaller than the upper limit value, the total control unit 4 gives signals for opening the first pneumatic switch 7 and starting the first fluid conveying device so as to inject foaming agent; when the accumulated liquid pressure data is not larger than the lower limit value, the master control unit 4 gives signals to close the first pneumatic switch 7 and stop the first fluid conveying device so as to stop injecting the foaming agent. Add medicine 24 at intelligence and set up the single current valve, prevent that interior hydrops from getting into foaming agent jar 1.
When the foam height detection element 10 adopts a CTS-PM type foam height controller, the upper limit value and the lower limit value of the foam height may be set in the total control unit 4, or may be set in the CTS-PM type foam height controller.
When the total control unit 4 is provided with a foam height upper limit value and a foam height lower limit value, the CTS-PM foam height controller only collects foam height data in the three-phase separator 3 in real time and sends the collected foam height data to the total control unit 4, when the foam height data is not less than the foam height upper limit value, the total control unit 4 gives a signal that the second pneumatic switch 13 is opened and the second fluid conveying device is started to inject the defoaming agent, and when the foam height data is not more than the foam height lower limit value, the total control unit 4 gives a signal that the second pneumatic switch 13 is closed and the second fluid conveying device stops running to stop injecting the defoaming agent.
When the CTS-PM type foam height controller is provided with the upper foam height limit value and the lower foam height limit value, the CTS-PM type foam height controller not only collects foam height data in the three-phase separator 3 in real time, but also has the function of comparing the foam height data with the upper foam height limit value and the lower foam height limit value, and sends the comparison result to the master control unit 4, and the master control unit 4 controls the injection of the defoaming agent according to the mode.
The foam height measuring instrument (WH 010XA-G foam height measuring instrument) only undertakes the task of acquiring foam height data within the three-phase separator 3.
As shown in fig. 1, a first temperature detection element 14 is arranged on the foaming agent tank 1, a first heat tracing band 15 is arranged on the outer side of the foaming agent tank 1, and the master control unit 4 is electrically connected with a control input end of the first heat tracing band 15 and the first temperature detection element 14 respectively; the defoaming agent tank 2 is provided with a second temperature detection element 16, the outer side of the defoaming agent tank 2 is provided with a second heat tracing band 17, and the master control unit 4 is electrically connected with the control input end of the second heat tracing band 17 and the second temperature detection element 16 respectively.
The main control unit 4 sets the lower temperature limit value and the upper temperature limit value of the foaming agent tank 1, the first temperature detection element 14 collects the temperature data of the foaming agent tank 1 in real time, sends the temperature data to the main control unit 4 to be compared with the temperature set value, and sends a corresponding signal according to the comparison result.
For example, when the temperature is not more than the lower temperature limit value, the overall control unit 4 gives a signal to the first heat trace band 15 to start heating; when the temperature is not less than the upper temperature limit value, the main control unit 4 gives a signal for stopping heating of the first heat tracing band 15, and the function is mainly to avoid freezing of the medicament in winter construction.
The temperature control of the defoaming agent tank 2 is the same.
As shown in the attached figure 1, a first liquid level detection element 18 is arranged on the foaming agent tank 1, a second liquid level detection element 19 is arranged on the defoaming agent tank 2, and the total control unit 4 is electrically connected with the first liquid level detection element 18 and the second liquid level detection element 19 respectively.
The main control unit 4 sets the lower limit value of the liquid level of the foaming agent tank 1, the first liquid level detection element 18 collects the liquid level data of the foaming agent tank in real time, the liquid level data is sent to the main control unit 4 to be compared with the set value of the liquid level, and a liquid level control signal is sent according to the comparison result.
For example, when the liquid level is not greater than the lower limit value of the liquid level, which indicates that the foamer tank 1 is in a liquid-deficient state, the general control unit 4 gives a signal to the first fluid delivery means to stop operation and to turn off the first pneumatic switch 7.
The liquid level control of the defoaming agent tank 2 is the same.
As shown in fig. 1, the first fluid conveying device adopts a first metering pump 20, the second fluid conveying device adopts a second metering pump 21, a first pressure sensor is arranged at the outlet end of the first metering pump 20, a second pressure sensor is arranged at the outlet end of the second metering pump 21, and the first pressure sensor and the second pressure sensor are respectively and electrically connected with the main control unit 4; and a stirring device is arranged on the foaming agent tank 1, and the motor control end of the stirring device is electrically connected with the master control unit 4.
The method comprises the steps that corresponding pressure sensors are arranged at the outlet ends of a first metering pump 20 and a second metering pump 21, pressure data of the outlet ends of the respective corresponding metering pumps are collected by the pressure sensors and fed back to a master control unit 4, and the master control unit 4 gives corresponding instructions so as to ensure safe operation of the first metering pump 20 and the second metering pump 21 and prevent overpressure of equipment (metering pumps).
For example, the total control unit 4 sets the upper pressure limit value of the first metering pump 20, and when the pressure data detected by the first pressure sensor is not less than the upper pressure limit value, the total control unit 4 sends out signals that the first metering pump 20 is stopped and the first pneumatic switch 7 is turned off.
The safety control of the second metering pump 21 is the same.
As shown in fig. 1, the system further comprises a display module, wherein the display module is a touch display, and the touch display is electrically connected with the total control unit 4.
The touch screen display is a well-known and common display, and can be operated on a host computer through the touch screen display.
The main control unit 4 adopts a controller in the prior known technology, such as a single chip microcomputer (STC single chip microcomputer, PIC single chip microcomputer, ATMEL single chip microcomputer, etc.); the first flow rate detection element 6 and the second flow rate detection element 12 can adopt a flow meter in the prior art; the first liquid level detection element 18 and the second liquid level detection element 19 are liquid level sensors and the first temperature detection element 14 and the second temperature detection element 16 are temperature sensors. The foam height detecting element 10 may also be implemented by other existing foam height measuring instruments such as a gamma ray level meter. The stirring device is a stirrer 22 known and used in the art.
The flowmeter can be XY-RSL, and is produced and sold by Jiangsu West instrument science and technology Limited; the first and second metering pumps 20 and 21 may each be of the GM242 series, manufactured and sold by shanghai engineering valve limited, and the heater (heat tracing band) may be of the HANYUN type, manufactured and sold by han shipping electro thermal titanium products, limited, guangzhou.
The power supply system adopted by the device comprises the existing public power devices (a storage battery, a primary power distribution cabinet and a secondary power distribution cabinet), and the power devices can adopt photovoltaic power generation, wind power generation and the like.
The master control unit 4 is provided with a communication module, and the communication module is in communication connection with a mobile terminal (a mobile phone, a mobile tablet or a mobile PC) through a 4G mobile communication network or a 5G mobile communication network; or, a WIFI module is arranged in the master control unit 4, and the mobile terminal is connected with the master control unit 4 through the WIFI module, so that remote monitoring and control are facilitated.
According to the invention, the continuous oil pipe 8 is put to the bottom of the well, foaming agents are injected quantitatively according to the detection pressure of the gas well 23, and defoaming agents are injected according to the foaming condition of the three-phase separator 3, so that compared with the conventional foam displacement, the artificial subjective judgment in the past is avoided, the agents can be greatly saved, the agent cost is reduced, in addition, a large amount of foaming agents and defoaming agents are prevented from entering, and the influence of the excessive foaming agents and defoaming agents on the subsequent coagulation emulsification and water treatment is effectively relieved; due to automatic control, the probability of serious loss caused by flooding of the gas well 23 due to untimely foaming agent injection and entering of bubbles into a downstream pipe network due to untimely defoaming agent injection is greatly reduced, and full-automatic foam discharging, cost reduction and efficiency improvement are realized.
The coiled tubing 8 of the present invention can be inserted from inside the tubing and gradually lowered into the well so as to not affect the layout of tools in the well and achieve injection of the agent into the bottom of the gas well 23.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A full-automatic foam discharging gas production device is characterized by comprising a foaming agent tank, a defoaming agent tank, a three-phase separator and a master control unit, wherein a foaming agent injection pipeline is fixedly communicated with a liquid outlet at the lower part of the foaming agent tank, a first flow detection element, a first pneumatic switch and a first fluid conveying device are connected to the foaming agent injection pipeline in series, and a continuous oil pipe is fixedly communicated with a liquid outlet of the foaming agent injection pipeline; a liquid drainage pipeline is fixedly communicated with a liquid inlet of the three-phase separator, a foam height detection element for detecting the foam height in the three-phase separator is arranged on the three-phase separator, an antifoaming agent injection pipeline is fixedly communicated between the liquid drainage pipeline and a liquid outlet at the lower part of the antifoaming agent tank, and a second flow detection element, a second pneumatic switch and a second fluid conveying device are connected in series on the antifoaming agent injection pipeline; the first flow detection element, the first pneumatic switch, the first fluid conveying device, the second flow detection element, the second pneumatic switch and the second fluid conveying device are respectively and electrically connected with the master control unit; the bottom of the continuous oil pipe is fixedly communicated with an intelligent dosing joint, a liquid accumulation detection element for detecting the liquid accumulation at the bottom of the well is arranged on the intelligent dosing joint, and the liquid accumulation detection element is electrically connected with a master control unit.
2. The full-automatic foam discharging gas production device according to claim 1, wherein a check valve is further arranged on the intelligent dosing connector, a liquid accumulation detection element for detecting the amount of liquid accumulated at the bottom of the well adopts a first pressure sensor, and the first pressure sensor is electrically connected with the master control unit; or/and the foam height detection element adopts a CTS-PM type foam height controller, and the CTS-PM type foam height controller is electrically connected with the master control unit; alternatively, the foam height detecting element is a foam height measuring instrument.
3. The full-automatic foam discharging and gas producing device according to claim 1 or 2, wherein a first temperature detecting element is arranged on the foaming agent tank, a first heat tracing band is arranged on the outer side of the foaming agent tank, and the master control unit is electrically connected with the control input end of the first heat tracing band and the first temperature detecting element respectively; or/and a second temperature detection element is arranged on the defoaming agent tank, a second heat tracing band is arranged on the outer side of the defoaming agent tank, and the master control unit is electrically connected with the control input end of the second heat tracing band and the second temperature detection element respectively; or/and a first liquid level detection element is arranged on the foaming agent tank, a second liquid level detection element is arranged on the defoaming agent tank, and the master control unit is electrically connected with the first liquid level detection element and the second liquid level detection element respectively.
4. The full-automatic foam drainage gas production device according to claim 1, 2 or 3, wherein the first fluid conveying device adopts a first metering pump, the second fluid conveying device adopts a second metering pump, a first pressure sensor is arranged at the outlet end of the first metering pump, a second pressure sensor is arranged at the outlet end of the second metering pump, and the first pressure sensor and the second pressure sensor are respectively and electrically connected with the master control unit; or/and a stirring device is arranged on the foaming agent tank, and the motor control end of the stirring device is electrically connected with the master control unit; the display module is a touch display, and the touch display is electrically connected with the master control unit; the master control unit is provided with a communication module, and the communication module is in communication connection with the mobile terminal by adopting a 4G mobile communication network or a 5G mobile communication network and the like; or a WIFI module is arranged in the master control unit, and the mobile terminal is connected with the master control unit through the WIFI module.
5. A foam drainage gas production method adopting the full-automatic foam drainage gas production device of any one of claims 1 to 4 is characterized by comprising the following steps: the coiled tubing is put into a well, the bottom end of the coiled tubing extends into the bottom of a gas well, the liquid inlet end of a liquid discharge pipeline is communicated with a well head, a liquid accumulation detection element not only collects data of liquid accumulation in the well, but also sends the collected data of the liquid accumulation to a master control unit, the master control unit determines the injection amount of a foaming agent according to the data of the liquid accumulation in the well, then the master control unit gives a signal for opening a first pneumatic switch and starting a first fluid conveying device so as to inject a required amount of the foaming agent into the well, the injection amount of the foaming agent is monitored by a first flow detection element, a large amount of low-density foam generated under the stirring action of natural gas flow after the foaming agent is mixed with the liquid accumulation in the well bottom enters a three-phase separator through the liquid discharge pipeline to carry out three-phase separation, a foam height detection element collects the foam height data in the three-phase separator and compares the foam height, and the total control unit gives signals of whether to inject the defoaming agent and the injection amount according to the comparison result.
6. The foam drainage gas production method according to claim 5, wherein when the master control unit sets a foam height upper limit value and a foam height lower limit value, the foam height detection element only collects foam height data in the three-phase separator in real time and sends the collected foam height data to the master control unit, when the foam height data is not less than the foam height upper limit value, the master control unit gives a signal for turning on the second pneumatic switch and starting the second fluid conveying device to inject the defoaming agent, and when the foam height data is not more than the foam height lower limit value, the master control unit gives a signal for turning off the second pneumatic switch and stopping the second fluid conveying device to stop injecting the defoaming agent.
7. The foam drainage gas production method according to claim 6, wherein the foam height detection element adopts a CTS-PM type foam height controller, and when the CTS-PM type foam height controller sets a foam height upper limit value and a foam height lower limit value, the CTS-PM type foam height controller not only collects foam height data in the three-phase separator in real time, but also can compare the foam height data with the foam height upper limit value and the foam height lower limit value, and sends the comparison result to a master control unit, and then the master control unit controls the injection of a defoaming agent; or the foam height detection element adopts a CTS-PM type foam height controller, the CTS-PM type foam height controller only collects foam height data in the three-phase separator in real time and sends the collected foam height data to the master control unit, when the foam height data is not less than the upper limit value of the foam height, the master control unit gives signals for turning on the second pneumatic switch and starting the second fluid conveying device so as to inject the defoaming agent, and when the foam height data is not more than the lower limit value of the foam height, the master control unit gives signals for turning off the second pneumatic switch and stopping the second fluid conveying device so as to stop injecting the defoaming agent.
8. The foam drainage gas production method according to claim 5, 6 or 7, wherein the total control unit sets lower temperature limit values and upper temperature limit values of the foaming agent tank and the defoaming agent tank, the first temperature detection element and the second temperature detection element collect temperature data of the foaming agent tank and the defoaming agent tank corresponding to each other in real time, the temperature data are sent to the total control unit to be compared with temperature set values of the total control unit, and temperature control is performed according to a comparison result.
9. The foam drainage gas production method according to claim 5, 6 or 7, wherein the master control unit sets lower limit values of liquid levels of the foaming agent tank and the defoaming agent tank, the first liquid level detection element and the second liquid level detection element collect liquid level data of the respective corresponding foaming agent tank in real time, send the liquid level data to the master control unit to be compared with the set value of the liquid level thereof, and perform liquid level control according to the comparison result; or/and setting the upper pressure limit values of the first metering pump and the second metering pump in the master control unit, comparing the pressure data acquired by the first pressure sensor and the second pressure sensor with the corresponding upper pressure limit set values, and controlling the running states of the first metering pump and the second metering pump according to the comparison result.
10. The foam drainage gas production method according to claim 8, wherein a master control unit sets lower limit values of liquid levels of a foaming agent tank and a defoaming agent tank, a first liquid level detection element and a second liquid level detection element collect liquid level data of the respective corresponding foaming agent tank in real time, the liquid level data are sent to the master control unit to be compared with a set value of the liquid level, and liquid level control is performed according to a comparison result; or/and setting the upper pressure limit values of the first metering pump and the second metering pump in the master control unit, comparing the pressure data acquired by the first pressure sensor and the second pressure sensor with the corresponding upper pressure limit set values, and controlling the running states of the first metering pump and the second metering pump according to the comparison result.
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| CN116971753A (en) * | 2022-04-21 | 2023-10-31 | 中国石油天然气股份有限公司 | An automatic blending device, method and electronic equipment for natural gas production |
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