CN113236215A - Single-well pressure-reducing and yield-increasing device and method thereof - Google Patents
Single-well pressure-reducing and yield-increasing device and method thereof Download PDFInfo
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- CN113236215A CN113236215A CN202110694125.9A CN202110694125A CN113236215A CN 113236215 A CN113236215 A CN 113236215A CN 202110694125 A CN202110694125 A CN 202110694125A CN 113236215 A CN113236215 A CN 113236215A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 232
- 239000003129 oil well Substances 0.000 claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 claims abstract description 58
- 230000009467 reduction Effects 0.000 claims abstract description 15
- 230000000638 stimulation Effects 0.000 claims description 34
- 241000191291 Abies alba Species 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 138
- 238000011084 recovery Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 8
- 239000010779 crude oil Substances 0.000 description 6
- 230000002354 daily effect Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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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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Abstract
The invention discloses a single-well pressure-reducing and yield-increasing device and a method thereof, wherein the single-well pressure-reducing and yield-increasing device comprises the following steps: the liquid mixing pump receives the output produced liquid to pressurize the produced liquid, and the produced liquid after the produced liquid is pressurized is output through an oil pipeline; the frequency converter is connected with the liquid mixing pump and is used for adjusting the discharge capacity of the liquid mixing pump; the pressure gauge is connected with an inlet of the liquid mixing pump, and is used for measuring the pressure of the liquid mixing pump in real time; the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve is started, the produced liquid does not enter the liquid mixing pump any more, and an alarm signal is output and sent through the electromagnetic valve. The hydraulic mixing pump has the advantages that return pressure reduction production is achieved, the ground liquid conveying resistance is transferred to the hydraulic mixing pump through kinetic energy borne by the underground pump, wellhead return pressure is reduced, leakage of the pump is reduced, opening and closing time of a valve is advanced or delayed, oil well yield is improved, equipment faults are found in time, and production safety is guaranteed.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a single-well pressure-reducing and yield-increasing device and a method thereof.
Background
The secondary oil recovery of hundreds of thousands of oil wells in the country is mechanical oil recovery, which utilizes a screw pump, an electric submersible pump or an oil pumping unit to suck and lift the crude oil in the underground of the stratum to the ground and utilizes the kinetic energy of equipment to push the crude oil to a terminal point. Such as: the oil pumping well utilizes electric energy to convert the rotation motion of a motor into up-and-down reciprocating motion through a four-bar mechanism, so that a valve of an underground oil pump is opened or closed to form stratum liquid which enters a pump and is discharged from a ground well head, and the stratum produced liquid overcomes friction resistance and is transported to a terminal point under the forced pushing of power. Because the liquid pipelines produced by ground conveying stratums are different in conveying distance, different in pipeline material and different in conveying resistance due to different diameters, the pressure borne by the underground oil pump is different, and the opening or closing time of the underground pump valve is changed.
The prior art at least has the following technical problems:
the technical problems that the working state of a mechanical recovery system is influenced and the oil production is reduced exist due to the fact that the ground pipeline back pressure is increased in the oil recovery and transportation process.
Disclosure of Invention
The embodiment of the application provides a single-well pressure reduction and yield increase device and a method thereof, and solves the technical problems that in the prior art, the working state of a mechanical recovery system is influenced and the oil yield is reduced due to the fact that the return pressure of a ground pipeline is increased in the oil recovery and transportation process.
In view of the above problems, the present application provides a single-well depressurization stimulation device and a method thereof.
In a first aspect, the present invention provides a single well pressure-reducing production-increasing device, one end of which is connected to a tubing valve of an oil-well production tree and the other end of which is connected to an oil pipeline, wherein the single well pressure-reducing production-increasing device comprises: the input end of the liquid mixing pump is connected with the oil well Christmas tree oil pipe valve through an oil conveying pipe, the produced liquid output by the oil well Christmas tree oil pipe valve is received, the produced liquid is pressurized, the output end of the liquid mixing pump is connected with the oil conveying pipe through an oil pipe, and the pressurized produced liquid is output through the oil conveying pipe; the frequency converter is connected with the liquid mixing pump and used for adjusting the discharge capacity of the liquid mixing pump; the pressure gauge is connected with an inlet of the liquid mixing pump and is used for measuring the pressure of the liquid mixing pump in real time; the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, and the output end of the electromagnetic valve is connected with the oil pipeline; when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve receives the signal of the pressure gauge and automatically starts, the produced liquid output by the oil production tree tubing valve does not enter the liquid mixing pump any more, is output to the outlet of the liquid mixing pump through the electromagnetic valve, and sends an alarm signal through the electromagnetic valve.
Preferably, the single well stimulation apparatus further comprises: the input end of the heater is connected with the outlet of the liquid mixing pump and used for receiving the output liquid output by the liquid mixing pump to heat, the output end of the heater is divided into two paths, one path is connected with the oil conveying pipeline through an oil conveying pipe, and the other path is connected with the oil pipe valve of the oil well Christmas tree through the oil conveying pipe.
Preferably, the single well stimulation apparatus further comprises: the first valve is arranged on an oil conveying pipe connected between the oil well Christmas tree oil pipe valve and the liquid mixing valve; the second valve is arranged on an oil delivery pipe connected between the single-well pressure-reducing and production-increasing device and the oil delivery pipe; the third valve is arranged on an oil conveying pipe connected between the heater and the oil well Christmas tree oil pipe valve; the fourth valve is arranged on the oil conveying pipeline and is positioned between the first valve and the second valve; when the first valve and the second valve are opened and the third valve and the fourth valve are closed, a first loop is formed; and when the first valve and the third valve are opened and the second valve and the fourth valve are closed, a second loop is formed.
Preferably, the single well stimulation apparatus further comprises: and the flowmeter is arranged at an outlet of the single-well pressure-reducing and production-increasing device and is used for carrying out flow statistics on the output liquid conveyed in the single-well pressure-reducing and production-increasing device.
Preferably, the liquid mixing pump is a gas-liquid mixing delivery screw pump, wherein the gas-liquid mixing delivery ratio of the gas-liquid mixing delivery screw pump is 6: 3.
Preferably, the temperature resistance of the liquid mixing pump is 85 ℃.
Preferably, the electromagnetic valve is an electric ball valve.
Preferably, the single well stimulation apparatus further comprises: and the remote equipment is in communication connection with the electromagnetic valve and receives the alarm signal sent by the electromagnetic valve.
In a second aspect, the invention provides a pumping unit comprising the single-well pressure reduction stimulation device.
In a third aspect, the invention provides a single well depressurization stimulation method, which is applied to the single well depressurization stimulation apparatus, and comprises the following steps: receiving output liquid output by a tubing valve of an oil well Christmas tree through a liquid mixing pump, and pressurizing and increasing gas of the output liquid and outputting the output liquid through an oil pipeline; the oil pipeline generates back pressure in the process of conveying produced liquid and transmits the back pressure to the liquid mixing pump; monitoring the pressure value of the liquid mixing pump in real time through a pressure gauge; when the pressure value exceeds the set value, the electromagnetic valve receives a signal to automatically open, when the pressure value exceeds the set value, the produced liquid does not flow into the liquid mixing pump any more, is output through the electromagnetic valve, and sends an alarm signal to remote equipment through the electromagnetic valve.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
the embodiment of the application provides a pair of single well step-down production increase device, single well step-down production increase device one end is connected with oil well production tree tubing valve, and the other end is connected with oil pipeline, wherein, single well step-down production increase device includes: the input end of the liquid mixing pump is connected with the oil well Christmas tree oil pipe valve through an oil conveying pipe, the produced liquid output by the oil well Christmas tree oil pipe valve is received, the produced liquid is pressurized, the output end of the liquid mixing pump is connected with the oil conveying pipe through an oil pipe, and the pressurized produced liquid is output through the oil conveying pipe; the frequency converter is connected with the liquid mixing pump and used for adjusting the discharge capacity of the liquid mixing pump; the pressure gauge is connected with an inlet of the liquid mixing pump and is used for measuring the pressure of the liquid mixing pump in real time; the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, and the output end of the electromagnetic valve is connected with the oil pipeline; when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve receives the signal of the pressure gauge and automatically starts, the produced liquid output by the oil production tree tubing valve does not enter the liquid mixing pump any more, is output to the outlet of the liquid mixing pump through the electromagnetic valve, and sends an alarm signal through the electromagnetic valve. The hydraulic mixing pump has the advantages that return pressure reduction production is achieved, the ground liquid conveying resistance is transferred to the hydraulic mixing pump through kinetic energy borne by the underground pump, wellhead return pressure is reduced, leakage of the pump is reduced, opening and closing time of a valve is advanced or delayed, oil well yield is improved, equipment faults can be found in time, and production safety is guaranteed. Therefore, the technical problems that the working state of a mechanical recovery system is influenced and the oil production is reduced due to the fact that the ground pipeline back pressure is increased in the oil recovery and transportation process in the prior art are solved.
Drawings
FIG. 1 is a schematic diagram of a single well stimulation tool according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of a single-well depressurization stimulation method according to an embodiment of the present application.
Description of reference numerals: the oil well production tree comprises an oil well production tree 1, an oil pipeline 2, a liquid mixing pump 3, a pressure gauge 4, an electromagnetic valve 5, a frequency converter 6, a heater 7, a flow meter 8, a fourth valve 9, a first valve 10, a third valve 11 and a second valve 12.
Detailed Description
The embodiment of the application provides a single-well pressure reduction and yield increase device and a method thereof, which are used for solving the technical problems that the working state of a mechanical recovery system is influenced and the oil yield is reduced due to the fact that the return pressure of a ground pipeline is increased in the oil recovery and transportation process in the prior art. The hydraulic mixing pump has the advantages that return pressure reduction production is achieved, the ground liquid conveying resistance is transferred to the hydraulic mixing pump through kinetic energy borne by the underground pump, wellhead return pressure is reduced, leakage of the pump is reduced, opening and closing time of a valve is advanced or delayed, oil well yield is improved, equipment faults can be found in time, and production safety is guaranteed.
The technical scheme provided by the invention has the following general idea:
single well depressurization and production increase device one end and oil well production tree tubing valve are connected, and the other end and defeated oil pipe way are connected, wherein, single well depressurization and production increase device includes: the input end of the liquid mixing pump is connected with the oil well Christmas tree oil pipe valve through an oil conveying pipe, the produced liquid output by the oil well Christmas tree oil pipe valve is received, the produced liquid is pressurized, the output end of the liquid mixing pump is connected with the oil conveying pipe through an oil pipe, and the pressurized produced liquid is output through the oil conveying pipe; the frequency converter is connected with the liquid mixing pump and used for adjusting the discharge capacity of the liquid mixing pump; the pressure gauge is connected with an inlet of the liquid mixing pump and is used for measuring the pressure of the liquid mixing pump in real time; the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, and the output end of the electromagnetic valve is connected with the oil pipeline; when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve receives the signal of the pressure gauge and automatically starts, the produced liquid output by the oil production tree tubing valve does not enter the liquid mixing pump any more, is output to the outlet of the liquid mixing pump through the electromagnetic valve, and sends an alarm signal through the electromagnetic valve.
The technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are described in detail in the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Example one
FIG. 1 is a schematic structural diagram of a single-well pressure-reducing stimulation apparatus in an embodiment of the present application. As shown in fig. 1, the embodiment of the present application provides a single well depressurization stimulation apparatus, single well depressurization stimulation apparatus one end is connected with oil well production tree 1 tubing valve, and the other end is connected with oil pipeline 2, wherein, single well depressurization stimulation apparatus includes: a liquid mixing pump 3, a frequency converter 6, a pressure gauge 4 and an electromagnetic valve 5.
The input end of the liquid mixing pump 3 is connected with the oil pipe valve of the oil well Christmas tree 1 through an oil pipe, the output liquid output by the oil pipe valve of the oil well Christmas tree 1 is received, the output liquid is pressurized, the output end of the liquid mixing pump 3 is connected with the oil pipe 2 through an oil pipe, and the pressurized output liquid is output through the oil pipe 2;
specifically, in the process of oil extraction of an oil well, mechanical oil extraction is mostly adopted, a motor rotates by utilizing an oil pumping unit through electric energy, the motor is converted into up-and-down reciprocating motion through a four-bar linkage mechanism, a valve of an underground oil pump is opened or closed, formation liquid is pumped into the well, a ground wellhead is discharged, and the formation produced liquid overcomes friction resistance and is transported to a terminal point under the forced pushing of power. When carrying out upper and lower reciprocating motion in the pump work in the pit of beam-pumping unit, the stratum has liquid output, through well head production tree tubing gate, liquid transport to terminal point, because of the ground pipeline is long, liquid transport resistance is big, therefore the back pressure is high, and high back pressure has more harm, discovers according to the research: 1, influence of high back pressure on a mechanical mining system and energy consumption: when the well head back pressure rises, the resistance borne by liquid in the oil pumping unit lifting shaft increases, meanwhile, the compression degree of the liquid in the oil pipe is increased, the density of the liquid is increased, the mass of a liquid column in the oil pipe is increased in the same ratio, the load of a suspension point of the oil pumping unit is increased, and the energy consumption of a motor rises accordingly. 2 high back pressure effects on oil well production: too high wellhead back pressure can cause the oil well pressure differential to decrease, thereby reducing production. Meanwhile, the high back pressure causes pipeline blockage, failure of underground accessories and the like, so that the oil extraction time rate is reduced, and the oil well yield is indirectly reduced. 3, the influence of high back pressure on the pumping efficiency of the oil well: because the well head back pressure acts on the liquid column to increase the load acting on the sucker rod and the pipe, the elastic expansion of the sucker rod and the pipe is increased, the stroke loss is increased, and the pump efficiency is reduced. On the other hand, the increase of the liquid column pressure reduces the dissolved gas precipitation amount in the crude oil, the density of the gas-liquid two-phase fluid increases the load of the liquid column, the elastic expansion of the sucker rod and the pipe is increased, and the pump efficiency is reduced. 4, the high back pressure has influence on the safety and environmental protection of the gathering and transportation system: the rising of well head back pressure makes the scene to run and emits the seepage, has increased the work load of the workman of staying in the well, still directly influences the tight liquid measure of oil well in addition, oil pumping equipment energy consumption and productivity construction investment, has increased consumables such as well head packing, belt, has also increased production incident and environmental pollution's risk simultaneously to a certain extent.
In order to avoid the above-mentioned harm that high back pressure brought, this application installs single well step-down production increase device additional on the ground between oil pipeline 2 and oil well production tree 1 tubing valve, with the back pressure by the downhole pump of beam-pumping unit to this single well step-down production increase device on, reduce the well head back pressure, reduce the leakage of downhole pump to carry out the pressure boost, increase gas transmission to oil pipeline terminal point for producing liquid through single well step-down production increase device. In the using process, the oil pumping unit outputs the stratum produced liquid to the ground through the oil well Christmas tree 1, the oil pipe valve of the oil well Christmas tree 1 is connected with the single-well pressure-reducing and yield-increasing device through the oil pipe for conveying, and the produced liquid collected on the ground enters the liquid mixing pump 3 to pressurize and increase the gas of the produced liquid and output the produced liquid.
The frequency converter 6 is connected with the liquid mixing pump 3 and is used for adjusting the discharge capacity of the liquid mixing pump 3;
particularly, be provided with converter 6 in the distribution stake, mix pump 3 with liquid and be connected, can change the 3 motor rotation speeds of liquid pump that mixes, the discharge capacity size of pump 3 is mixed to adjustment liquid, just also adjusted the height of well head back pressure simultaneously according to adjustment individual well discharge capacity size, according to experimental statistics well head back pressure every drop 10%, individual well head liquid production capacity just improves 10%. The technical problems that the working state of a mechanical extraction system is influenced and the oil yield is reduced due to long crude oil conveying distance, customer service resistance in the conveying process and rising of ground pipeline back pressure are solved, the technical effects of reducing back pressure production, transferring the ground liquid conveying resistance to a liquid mixing pump 3 by kinetic energy born by a downhole pump, reducing wellhead back pressure, reducing leakage of the pump, advancing or delaying the opening and closing time of a valve and improving the oil well yield are achieved.
The pressure gauge 4 is connected with an inlet of the liquid mixing pump 3 and is used for measuring the pressure of the liquid mixing pump 3 in real time;
specifically, the pressure of the liquid mixing pump 3 is monitored in real time by the electric contact pressure gauge 4 in front of the inlet of the liquid mixing pump 3, when the liquid mixing pump 3 has a problem, the pressure of the liquid mixing pump 3 rises to a pressure set value, and when the pressure value monitored by the pressure gauge 4 exceeds the pressure set value, the pressure gauge 4 sends a signal.
The input end of the electromagnetic valve 5 is connected with the pressure gauge 4, a control signal is sent according to the pressure value of the pressure gauge 4 to control the electromagnetic valve 5, and the output end of the electromagnetic valve 5 is connected with the oil pipeline;
when the pressure value of the pressure gauge 4 reaches a set value, the electromagnetic valve 5 receives a signal of the pressure gauge 4 to automatically start, and the produced liquid output by the tubing valve of the oil well Christmas tree 1 does not enter the liquid mixing pump 3 any more, is output through the electromagnetic valve 5, and sends an alarm signal through the electromagnetic valve 5.
Specifically speaking, solenoid valve 5 is connected with manometer 4, receive the control that manometer 4 gave the signal, it is normal when manometer 4 pressure monitoring, then solenoid valve 5 closes, when liquid mixes pump 3 when the problem, output liquid in the liquid mixes pump 3 is carried not away, can cause the pressure in the liquid mixes pump 3 to increase, when the pressure value that electric contact pressure gauge 4 monitored before the entry is greater than electric contact pressure gauge 4 setting value, send control signal and give solenoid valve 5, solenoid valve 5 will open automatically after receiving manometer 4's signal, output liquid is no longer gone into liquid and is mixed pump 3 and export through solenoid valve 5 output to liquid and mix pump 3 and directly get into defeated oil pipe line 2 and carry, solenoid valve 5 sends alarm signal and reports to the police for remote alarm. Through the cooperation of manometer 4 and solenoid valve 5, guarantee the security of liquid mixing pump 3, guarantee when liquid mixing pump 3 breaks down that the output liquid normally exports, avoid taking place big or small accident, guaranteed the operation security of single well step-down production increasing device.
Further, the single well pressure reduction stimulation device further comprises: the input end of the heater 7 is connected with the outlet of the liquid mixing pump 3 and used for receiving the output liquid output by the liquid mixing pump 3 to heat, the output end of the heater 7 is divided into two paths, one path is connected with the oil conveying pipeline 2 through an oil conveying pipeline, and the other path is connected with the oil pipe valve of the oil well Christmas tree 1 through an oil conveying pipeline.
Specifically, for a single well with a low wellhead temperature and a serious wax discharge in oil, the produced fluid is low in temperature and poor in fluidity, the transportation is difficult, in order to ensure the smoothness of the oil transportation work, the heater 7 is connected with the fluid mixing pump 3 to heat the produced fluid in the oil transportation pipe, the heater 7 is preferably an electric heater, and the viscosity of the produced fluid is reduced and the fluidity of the produced fluid is increased after the produced fluid is heated by the heater 7, so that the oil transportation efficiency is improved.
Further, the single well pressure reduction stimulation device further comprises: the first valve 10 is arranged on an oil pipeline connected between the oil pipe valve of the oil well Christmas tree 1 and the liquid mixing valve 3; the second valve 12 is arranged on an oil delivery pipe connected between the single-well pressure reduction and production increase device and the oil delivery pipe 2; the third valve 11 is arranged on an oil delivery pipe connected between the heater 7 and the oil pipe valve of the oil well Christmas tree 1; a fourth valve 9, wherein the fourth valve 9 is arranged on the oil pipeline and is positioned between the first valve 10 and the second valve 12; when the first valve 10 and the second valve 12 are opened and the third valve 11 and the fourth valve 9 are closed, a first loop is formed; when the first valve 10 and the third valve 11 are opened and the second valve 12 and the fourth valve 9 are closed, a second loop is formed.
Specifically, a plurality of groups of valves are arranged on a connecting oil conveying pipe of the single-well pressure reduction and yield increase device, the oil well Christmas tree 1 and the oil conveying pipe 2, multi-loop arrangement is achieved, the first loop is a loop for normally conveying output liquid, namely, outer circulation, the output liquid is conveyed to the ground from the bottom of a well and then enters the liquid mixing pump 3 through the oil conveying pipe of the first valve 10, the heater 7 is used for heating and conveying the crude oil ground oil conveying pipe 2, blockage in the ground pipeline is eliminated, conveying resistance is reduced, the heater 7 is used for heating the output liquid to improve the fluidity of the output liquid, friction resistance is reduced, and the output liquid enters the oil conveying pipe 2 through the second valve 12 and is conveyed to a terminal. The first loop is heated by the heater 7 to the oil delivery pipe in the loop, so that the conveying efficiency is improved, and meanwhile, the blockage such as wax which is commonly accumulated in the oil delivery pipe 2 is cleaned to ensure the smoothness of the oil delivery pipe 2. The second return circuit is single well step-down output increasing device and the inner loop in pit, output liquid gets into heater 7 through the defeated oil pipe of first valve 10 and heats, get into in the pit through fourth valve 9 after the heating output, produce the liquid in the pit and heat, ensure the mobility of the intraductal output liquid of oil transportation in the pit, improve conveying efficiency, this kind is low to downhole temperature, the fast single well that influences the transport of wax deposition speed in the acquisition process is very effective, to the oil well, the deep heating in the pit, the jam of wax to the crude oil of output ascending passageway is clear away. Output after heating the output liquid in second return circuit and the interior return circuit in the pit, improved the efficiency of transport, further realize the technological effect of increase production. Wherein fourth valve 9 is the closure state in single well step-down production increase device use, when single well step-down production increase device broke down and need maintain and demolish, open fourth valve 9 and close first, second, third valve and can resume the condition of carrying out the transport through the downhole pump of well head production tree, ensure going on smoothly of whole transport work, therefore this single well step-down production increase device has the commonality, install the technical effect that the flexibility ratio is high.
Further, the single well pressure reduction stimulation device further comprises: and the flowmeter 8 is arranged at the outlet of the single-well pressure-reducing and production-increasing device, and is used for carrying out flow statistics on the output liquid conveyed in the single-well pressure-reducing and production-increasing device.
Particularly, the outlet of the single-well pressure reduction and yield increase device is provided with a flowmeter 8 for carrying out flow statistics on the delivered produced fluid, so that the oil production delivery volume is convenient to carry out statistics and maintenance.
Further, the liquid mixing pump 3 is a gas-liquid mixing screw pump, wherein the gas-liquid mixing ratio of the gas-liquid mixing screw pump to the liquid mixing screw pump is 6: 3.
Further, the temperature resistance of the liquid mixing pump 3 is 85 ℃.
Particularly, because of some oil wells have gaseous output, what liquid mix pump 3 chooseed for use in this application is gas, liquid and mixes defeated screw pump, but oil, gas, water are mixed defeated, have self priming, also can idle running, can not form the airlock, play the effect that oil, gas, water mix simultaneously, can make the liquid after mixing to the gas band liquid, with the band oil, reduce friction drag. The gas-liquid mixing transmission ratio of the liquid mixing pump 3 is 6:3, the pump has the advantages of high temperature resistance of 85 ℃, large lift of 1-10MPa, strong self-absorption capacity, adjustable discharge capacity through the frequency converter 6, namely adjustable return pressure, no pulsation of transported liquid, small vibration force of equipment, low noise, and a heating device lubricated by a sealing system.
Further, the electromagnetic valve 5 is an electric ball valve.
Specifically, the inside of the valve of the electromagnetic valve 5 is a sphere which rotates, the channel is large, the resistance is small, the requirement on a conveying medium is low, the influence of a small amount of silt is avoided, and according to the size of a pressure design value, a switch instruction, switch information and remote transmission and alarming can be quickly executed.
Further, the single well pressure reduction stimulation device further comprises: and the remote equipment is in communication connection with the electromagnetic valve 5 and receives the alarm signal sent by the electromagnetic valve 5.
Particularly, when liquid mixes pump 3 and breaks down, send alarm signal through solenoid valve 5, be connected with remote equipment, send alarm signal to staff, remote equipment can be smart mobile phone, PC etc. realizes reporting to the police in time to the staff, and the staff of being convenient for reachs the scene fast and carries out troubleshooting and maintenance, ensures oil recovery work and the normal operating of single well step-down yield increasing device.
Example two
The embodiment of the application provides a pumping unit, including embodiment one single well step-down stimulation device, all use and technical effect in embodiment one all adapt to this application embodiment the pumping unit, here no longer redundantly.
EXAMPLE III
The embodiment of the present application provides a single-well depressurization and stimulation method, which is applied to a single-well depressurization and stimulation device according to the embodiment, please refer to fig. 2, fig. 2 is a schematic flow diagram of a single-well depressurization and stimulation method, and the method includes:
step S10: receiving a produced liquid output by a tubing valve of an oil well Christmas tree 1 through a liquid mixing pump 3, and pressurizing and increasing gas of the produced liquid to output the produced liquid through an oil pipeline 2;
step S20: the oil pipeline 2 generates back pressure in the process of conveying produced liquid and transmits the back pressure to the liquid mixing pump 3;
step S30: monitoring the pressure value of the liquid mixing pump 3 in real time through a pressure gauge 4;
step S40: when the pressure value exceeds the set value, the electromagnetic valve 5 receives a signal to automatically open, when the pressure value exceeds the set value, the produced liquid does not flow into the liquid mixing pump 3 any more, is output through the electromagnetic valve 5, and sends an alarm signal to remote equipment through the electromagnetic valve 5.
Particularly, after the liquid that produces in the pit is carried to ground through oil well production tree 1, the output liquid gets into liquid through first return circuit and mixes pump 3, and rethread heater 7 heats the output liquid, carries to the terminal point through defeated oil pipe way 2 after the heating, realizes reducing the effect of back pressure in defeated oil pipe way 2 through the adjustment of heating and the 3 discharge capacities of liquid pump that mixes, and the back pressure that produces in the pipeline can feed back to liquid pump 3 that mixes simultaneously, avoids the harm to the pump in the pit. When the produced liquid conveyed by the liquid mixing pump 3 with a fault is accumulated, the pressure of the liquid mixing pump 3 rises, when the pressure value exceeds a set value, the pressure gauge 4 sends a signal to control the electromagnetic valve 5 to be automatically opened, the produced liquid does not enter the liquid mixing pump 3 and is directly conveyed to the outlet of the liquid mixing pump 3 through the electromagnetic valve 5 to enter the oil conveying pipeline 2 for conveying, and an alarm signal is sent to remote equipment through the electromagnetic valve 5, so that a worker can timely know the current situation of an oil well and quickly arrive at the site for inspection and maintenance, the purpose of reducing the back pressure production is achieved, the ground liquid conveying resistance is transferred to the liquid mixing pump 3 by the kinetic energy born by the underground pump, the well mouth back pressure is reduced, the leakage of the pump is reduced, the opening and closing time of a valve is advanced or delayed, the oil well yield is improved, the equipment fault can be timely found, and the technical effect of the production safety is ensured. The technical problems that in the prior art, the working state of a mechanical recovery system is influenced and the oil production is reduced due to the fact that the ground pipeline back pressure is increased in the oil recovery and conveying process are solved.
Further, the method further comprises: when using the second return circuit, heat the second return circuit through heater 7 for output liquid temperature rising mobility in the second return circuit strengthens, has improved conveying efficiency, heats the second return circuit through heater 7 simultaneously, avoids in the pipeline wax deposition and causes the transport of jam and influence defeated oil pipe. The produced fluid in the second loop enters a heater 7 through the oil well Christmas tree 1 and then enters the underground through a fourth valve 9 to form internal circulation.
Further, the method further comprises: when the single-well pressure-reducing and yield-increasing device fails, the fourth valve 9 is opened, the first valve 10, the second valve 12 and the third valve 11 are closed, and produced fluid is directly conveyed to the conveying pipeline 2 through the oil-well Christmas tree 1. The technical effects of ensuring the normal oil extraction work and improving the flexibility of equipment use are achieved.
The following description of the beneficial effects of the present application is made in conjunction with specific research data:
according to the data of the influence of high back pressure on the oil well yield
The back pressure is increased from 0.8MPa to 1.1MPa from 9 months to 2016 months in 2015, and 6 well groups are influenced in total; and the liquid quantity of a single well group is averagely reduced by 8t/d every time the back pressure is increased by 0.1 MPa.
TABLE 1 statistical table of the well component liquid quantities affected by heavy 32 well zones
The pressure rises from 0.91MPa to 1.15MPa in 2016 to 2 months in 2017, and 2 well groups are influenced in total; and the liquid quantity of a single well group is averagely reduced by 12t/d every time the back pressure is increased by 0.1 MPa.
TABLE 2 statistical table of the amount of fluid in the affected well group for the heavy 37 well
Reducing the back pressure from 1.1MPa to 0.91MPa from 7 months to 11 months in 2017, and totally influencing 6 well groups; and when the back pressure is reduced by 0.1MPa, the liquid quantity of a single well group is averagely increased by 12 t/d.
Table 3 statistical table of well component fluid volume affected by 1-well zone (1)
Increasing the back pressure from 0.5MPa to 0.65MPa from 9 months to 2 months in 2017, and totally influencing 8 well groups; and the liquid quantity of a single well group is averagely reduced by 12t/d every time the back pressure rises by 0.1 MPa.
Table 4 statistical table of well component fluid volume affected by heavy 1 well zone (2)
The back pressure is increased from 1.22MPa to 1.46MPa from 10 months to 12 months in 2017, and 7 well groups are influenced in total; and the liquid quantity of a single well group is averagely reduced by 10t/d every time the back pressure rises by 0.1 MPa.
TABLE 5 statistical table of the well component fluid volume affected by the 18-well area (1)
Increasing the back pressure from 0.95MPa to 1.1MPa from 11 months to 12 months in 2017, and totally influencing 5 well groups; and the liquid quantity of a single well group is averagely reduced by 14t/d every time the back pressure rises by 0.1 MPa.
Table 6 statistical table of well component fluid volume affected by heavy 18 well (2)
Increasing the back pressure from 1.4MPa to 1.6MPa from 10 months to 2 months in 2017, and totally influencing 2 well groups; and the liquid quantity of a single well group is averagely reduced by 10t/d every time the back pressure rises by 0.1 MPa.
Table 7 statistical table of well component fluid volume affected by heavy 45 well (1)
In conclusion, according to analysis, the total 45 well groups are influenced by the back pressure, and the average liquid quantity of a single well group is reduced by 10t/d every time the back pressure rises by 0.1 MPa.
After the single-well pressure-reducing and yield-increasing device is installed and debugged, the back pressure can be adjusted at will, and the friction resistance and kinetic energy conveyed by the underground oil well pump on the ground can be borne and transferred to the pressure-reducing and yield-increasing device, while the leakage amount of a gap between a plunger and a pump cylinder of the underground oil well pump can be greatly reduced, the pumping amount of stratum produced liquid can be increased, and therefore the daily liquid yield of an oil well can be increased by not less than 20%.
1. Average oil increase of single well is 20%, if water content of 10 prescription of a certain well is 70%, 3 tons of daily oil production is carried out/day X20%, oil increase is carried out every day for 0.6 ton of the daily oil production, X30 days is 18 tons/month X10 months, 180 tons of the daily oil increase is carried out every ton of the daily oil production, 500-
2. The annual income is 900-.
3. The cost of each set is 6 ten thousand yuan, and the income per year is 300-.
4. In the second and third years, if the technical service has no cost, the profit is 900-: 100 sets of construction are used, 600 ten thousand yuan is always invested, 400 ten thousand yuan is recovered in the current year, 1000 ten thousand yuan X2 in the second year to the third year is 1800 ten thousand yuan X2 to 2000 ten thousand yuan. 1800 plus 300 plus 400 plus 2100 plus 2400 plus. One oil production plant and 100 sets of equipment only need 2 persons and 1 pick-up truck, so that the manpower is greatly saved, and the working efficiency is improved.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
the embodiment of the application provides a pair of single well step-down production increase device, single well step-down production increase device one end is connected with oil well production tree tubing valve, and the other end is connected with oil pipeline, wherein, single well step-down production increase device includes: the input end of the liquid mixing pump is connected with the oil well Christmas tree oil pipe valve through an oil conveying pipe, the produced liquid output by the oil well Christmas tree oil pipe valve is received, the produced liquid is pressurized, the output end of the liquid mixing pump is connected with the oil conveying pipe through an oil pipe, and the pressurized produced liquid is output through the oil conveying pipe; the frequency converter is connected with the liquid mixing pump and used for adjusting the discharge capacity of the liquid mixing pump; the pressure gauge is connected with an inlet of the liquid mixing pump and is used for measuring the pressure of the liquid mixing pump in real time; the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, and the output end of the electromagnetic valve is connected with the oil pipeline; when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve receives the signal of the pressure gauge and automatically starts, the produced liquid output by the oil production tree tubing valve does not enter the liquid mixing pump any more, is output to the outlet of the liquid mixing pump through the electromagnetic valve, and sends an alarm signal through the electromagnetic valve. The hydraulic mixing pump has the advantages that return pressure reduction production is achieved, the ground liquid conveying resistance is transferred to the hydraulic mixing pump through kinetic energy borne by the underground pump, wellhead return pressure is reduced, leakage of the pump is reduced, opening and closing time of a valve is advanced or delayed, oil well yield is improved, equipment faults can be found in time, and production safety is guaranteed. Therefore, the technical problems that the working state of a mechanical recovery system is influenced and the oil production is reduced due to the fact that the ground pipeline back pressure is increased in the oil recovery and transportation process in the prior art are solved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. The utility model provides a single well depressurization stimulation apparatus, its characterized in that, single well depressurization stimulation apparatus one end is connected with oil well production tree tubing valve, and the other end is connected with oil pipeline, wherein, single well depressurization stimulation apparatus includes:
the input end of the liquid mixing pump is connected with the oil well Christmas tree oil pipe valve through an oil conveying pipe, the produced liquid output by the oil well Christmas tree oil pipe valve is received, the produced liquid is pressurized, the output end of the liquid mixing pump is connected with the oil conveying pipe through an oil pipe, and the pressurized produced liquid is output through the oil conveying pipe;
the frequency converter is connected with the liquid mixing pump and used for adjusting the discharge capacity of the liquid mixing pump;
the pressure gauge is connected with an inlet of the liquid mixing pump and is used for measuring the pressure of the liquid mixing pump in real time;
the input end of the electromagnetic valve is connected with the pressure gauge, a control signal is sent according to the pressure value of the pressure gauge to control the electromagnetic valve, and the output end of the electromagnetic valve is connected with the oil pipeline;
when the pressure value of the pressure gauge reaches a set value, the electromagnetic valve receives the signal of the pressure gauge and automatically starts, the produced liquid output by the oil production tree tubing valve does not enter the liquid mixing pump any more, is output to the outlet of the liquid mixing pump through the electromagnetic valve, and sends an alarm signal through the electromagnetic valve.
2. The single well depressurization stimulation apparatus of claim 1, further comprising:
the input end of the heater is connected with the outlet of the liquid mixing pump and used for receiving the output liquid output by the liquid mixing pump to heat, the output end of the heater is divided into two paths, one path is connected with the oil conveying pipeline through an oil conveying pipe, and the other path is connected with the oil pipe valve of the oil well Christmas tree through the oil conveying pipe.
3. The single well depressurization stimulation apparatus of claim 2, further comprising:
the first valve is arranged on an oil conveying pipe connected between the oil well Christmas tree oil pipe valve and the liquid mixing valve;
the second valve is arranged on an oil delivery pipe connected between the single-well pressure-reducing and production-increasing device and the oil delivery pipe;
the third valve is arranged on an oil conveying pipe connected between the heater and the oil well Christmas tree oil pipe valve;
the fourth valve is arranged on the oil conveying pipeline and is positioned between the first valve and the second valve;
when the first valve and the second valve are opened and the third valve and the fourth valve are closed, a first loop is formed; and when the first valve and the third valve are opened and the second valve and the fourth valve are closed, a second loop is formed.
4. The single well depressurization stimulation apparatus of claim 1, further comprising:
and the flowmeter is arranged at an outlet of the single-well pressure-reducing and production-increasing device and is used for carrying out flow statistics on the output liquid conveyed in the single-well pressure-reducing and production-increasing device.
5. The single-well pressure-reducing production-increasing device of claim 1, wherein the liquid mixing pump is a gas-liquid mixing delivery screw pump, and the gas-liquid mixing delivery ratio of the gas-liquid mixing delivery screw pump is 6: 3.
6. The single well depressurization stimulation apparatus of claim 5 wherein the fluid mixing pump is resistant to temperatures up to 85 ℃.
7. The single well pressure reducing stimulation apparatus of claim 1, wherein the solenoid valve is a motorized ball valve.
8. The single well depressurization stimulation apparatus of claim 1, further comprising:
and the remote equipment is in communication connection with the electromagnetic valve and receives the alarm signal sent by the electromagnetic valve.
9. A pumping unit comprising the single well pressure reduction stimulation apparatus of any one of claims 1-8.
10. A single well depressurization stimulation method applied to the single well depressurization stimulation apparatus of any one of claims 1 to 8, the method comprising:
receiving output liquid output by a tubing valve of an oil well Christmas tree through a liquid mixing pump, and pressurizing and increasing gas of the output liquid and outputting the output liquid through an oil pipeline;
the oil pipeline generates back pressure in the process of conveying produced liquid and transmits the back pressure to the liquid mixing pump;
monitoring the pressure value of the liquid mixing pump in real time through a pressure gauge;
when the pressure value exceeds the set value, the electromagnetic valve receives a signal to automatically open, when the pressure value exceeds the set value, the produced liquid does not flow into the liquid mixing pump any more, is output through the electromagnetic valve, and sends an alarm signal to remote equipment through the electromagnetic valve.
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