阅读说明：本技术 一种自动流入控水装置及其控水方法 (Automatic inflow water control device and water control method thereof ) 是由 易齐尊 刘孝强 谭章龙 唐少鹏 陈善饮 李伯仁 林德纯 陈光利 朱长林 刘妙仁 于 2020-06-04 设计创作，主要内容包括：一种自动流入控水装置及其控水方法,该自动流入控水装置包括：基管；自适应内流控制机构,安装在该基管上,包括自适应内流控制器和自适应外套,该自适应内流控制器上设置有用于连通该基管内外的通道,对应流经该自适应内流控制器的流体粘度不同,调整该通道的开度以自动限制流量；流入控制机构,套装在该基管上并与该自适应外套连接；增产流入控制机构,安装在该基管上,包括增产套筒和增产流入控制器,该增产流入控制器上设置有用于连通该基管内外的增产通道,根据生产压差或设定指定开启压差,控制开启或关闭该增产通道；以及流体注入单向流动器,用于保障从井口注入的液体只能单方向从该基管内流入地层。本发明还提供了该控水装置的控水方法。(An automatic inflow water control device and a water control method thereof, the automatic inflow water control device comprising: a base pipe; the self-adaptive inner flow control mechanism is arranged on the base pipe and comprises a self-adaptive inner flow controller and a self-adaptive outer sleeve, wherein the self-adaptive inner flow controller is provided with a channel for communicating the inside and the outside of the base pipe, and the opening degree of the channel is adjusted to automatically limit the flow rate according to different viscosities of fluids flowing through the self-adaptive inner flow controller; the inflow control mechanism is sleeved on the base pipe and is connected with the self-adaptive outer sleeve; the yield increasing inflow control mechanism is arranged on the base pipe and comprises a yield increasing sleeve and a yield increasing inflow controller, the yield increasing inflow controller is provided with a yield increasing channel for communicating the inside and the outside of the base pipe, and the yield increasing channel is controlled to be opened or closed according to the production pressure difference or the set specified opening pressure difference; and the fluid injection one-way flow device is used for ensuring that the liquid injected from the wellhead can only flow into the stratum from the inside of the base pipe in one direction. The invention also provides a water control method of the water control device.)

1. An automatic inflow water control device, comprising:

one end of the base pipe is communicated with the ground through an oil pipe, and a guide shoe used for guiding the pipe column to descend and seal is installed at the other end of the base pipe which is connected with the pipe column in series;

the adaptive internal flow control mechanism comprises an adaptive internal flow controller and an adaptive outer sleeve, wherein the adaptive internal flow controller is installed on the base pipe, the adaptive outer sleeve is sleeved outside the base pipe corresponding to the adaptive internal flow controller, a channel for communicating the inside and the outside of the base pipe is arranged on the adaptive internal flow controller, and the opening of the channel is adjusted to automatically limit the flow rate corresponding to different viscosities of fluids flowing through the adaptive internal flow controller;

the inflow control mechanism is sleeved on the base pipe and is connected with the self-adaptive outer sleeve;

the yield increasing inflow control mechanism comprises a yield increasing sleeve and a yield increasing inflow controller, the yield increasing inflow controller is installed on the base pipe, the yield increasing jacket is sleeved on the base pipe corresponding to the yield increasing inflow controller and is connected with the inflow control mechanism, a yield increasing channel used for communicating the inside and the outside of the base pipe is arranged on the yield increasing inflow controller, and the yield increasing inflow controller controls the opening or closing of the yield increasing channel according to the production differential pressure or the set specified opening differential pressure; and

and the fluid injection one-way flow device is used for ensuring that the liquid injected from the wellhead can only flow into the stratum from the inside of the base pipe in one direction.

2. The automatic inflow water control device of claim 1, further comprising a screen for sand control installed on the base pipe.

3. The automatic inflow water control device of claim 2, wherein the fluid injection one-way flow device is mounted on the base pipe or the screen.

4. The automatic inflow water control device according to claim 1, 2 or 3, wherein the adaptive inflow controller comprises a valve body and a disc installed in the valve body, the passage is provided on the valve body, and the relative position of the disc and the valve body is adjusted to control the opening degree of the passage in response to the difference in viscosity of the fluid flowing through the valve body.

5. The automatic inflow water control device according to claim 1, 2 or 3, wherein the inflow control mechanism comprises a support deflector provided with an overflow groove and an overflow pipe, a rotatable balance disc provided with a throttle hole, and a lock nut for locking the balance disc, wherein the balance disc is rotated to adjust the relative position of the throttle hole and the overflow pipe to control the overflow of the overflow groove.

6. The automatic inflow water control device as claimed in claim 5, wherein the orifice is provided with a tungsten alloy nipple.

7. The automatic inflow water control device of claim 1, 2 or 3, wherein the stimulation inflow controller comprises a valve body, a floating disk disposed within the valve body, a condition control valve mounted on the valve body, and a stimulation housing having stimulation through-holes disposed therein in communication with the valve body.

8. The automatic inflow water control device of claim 7, wherein the valve body comprises an upper casing, a lower casing, and a housing, the upper casing and the lower casing being mounted on the housing, respectively, the floating disc being disposed between the upper casing and the lower casing, the upper casing being provided with an upper through hole, the lower casing being provided with a lower through hole, the stimulation through hole, the upper through hole, and the lower through hole together forming the stimulation channel.

9. The automatic inflow control device of claim 2 or 3, wherein an inflow adjustment ring is further disposed between the stimulation sleeve and the screen.

10. An automatic inflow water control method, characterized in that the automatic inflow water control device of any one of the above claims 1-9 is used for water control in the whole production cycle of an oil well, comprising the following steps:

s100, during conventional flow-limiting production, fluid enters a flow channel between a yield increasing sleeve and a base pipe of a yield increasing inflow control mechanism through an inflow adjusting ring, flows into the self-adaptive internal flow control mechanism through the inflow control mechanism, enters the base pipe through the self-adaptive internal flow controller and then flows out of the ground;

s200, during production increasing, the ground increases the production pressure difference, fluid enters a flow channel between a production increasing sleeve of the production increasing inflow control mechanism and the base pipe through the inflow adjusting ring, the production increasing inflow controller of the production increasing inflow control mechanism is opened after the production pressure difference is increased, and the fluid enters the base pipe through the production increasing inflow controller and flows out to the ground; fluid simultaneously flows into the self-adaptive inner flow control mechanism from a flow passage between the stimulation sleeve and the base pipe through the inflow control mechanism, enters the base pipe through the self-adaptive inner flow controller, then flows out to the ground, and controls water while increasing the productivity; and

s300, when liquid needs to be injected into the stratum, fluid is injected into the fluid injection one-way flow device through the base pipe, flows through the inflow adjusting ring through the fluid injection one-way flow device and is extruded into the stratum through the sieve tube filter sleeve, and the injection operation is completed.

Technical Field

The invention relates to a horizontal well water control technology, in particular to an automatic inflow water control device capable of increasing production and injecting liquid and a water control method thereof.

Background

In the existing oil and natural gas exploitation process, a horizontal well is developed and applied in a large quantity due to the advantages of high liquid yield, small production pressure difference, small flow resistance and the like. The horizontal well has the characteristic of unbalanced flow liquid production profile, and the unbalanced flow profile can cause premature water breakthrough along with the extension of the mining time, reduce the service life of the well and influence the production capacity of the well.

The existing horizontal well water control technology adopts two modes, namely a passive water control mode of firstly finding water and then controlling water, which is carried out in a production state, and has the disadvantages of complex construction process, high technical requirement, more working procedures and great operation difficulty. Once water coning occurs, the water control mode fails; the second is to adopt inflow control tool to control water, and to prolong the balanced pressure drop of the horizontal well section through sand control filtration and throttling adjustment, and to inhibit the phenomenon of unbalanced movement of bottom water and side water ridges, thereby exerting the production capacity of the whole horizontal section and prolonging the service life of the horizontal well. However, some technologies must obtain well data in advance to design and carry out field adjustment, and are limited by structures, and the water control technologies are difficult to realize water control in the whole period.

In the application of partial oil and gas fields, high-efficiency water control is needed in the early stage, high-yield extract water control can be conducted in the later stage, meanwhile, acid injection and yield increase operation can be conducted in the later stage, the existing automatic inflow water control sieve tube cannot achieve the aim of comprehensive yield increase, and acid injection and yield increase or water injection and other operations cannot be effectively conducted in the later stage, so that the production efficiency cannot be improved to the maximum extent.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides an automatic inflow water control device capable of increasing the yield and injecting liquid and a water control method thereof.

In order to achieve the above object, the present invention provides an automatic inflow water control device, comprising:

one end of the base pipe is communicated with the ground through an oil pipe, and a guide shoe used for guiding the pipe column to descend and seal is installed at the other end of the pipe column connected in series with the base pipe;

the adaptive internal flow control mechanism comprises an adaptive internal flow controller and an adaptive outer sleeve, wherein the adaptive internal flow controller is installed on the base pipe, the adaptive outer sleeve is sleeved outside the base pipe corresponding to the adaptive internal flow controller, a channel for communicating the inside and the outside of the base pipe is arranged on the adaptive internal flow controller, and the opening of the channel is adjusted to automatically limit the flow rate corresponding to different viscosities of fluids flowing through the adaptive internal flow controller;

the inflow control mechanism is sleeved on the base pipe and is connected with the self-adaptive outer sleeve;

the yield increasing inflow control mechanism comprises a yield increasing sleeve and a yield increasing inflow controller, the yield increasing inflow controller is installed on the base pipe, the yield increasing jacket is sleeved on the base pipe corresponding to the yield increasing inflow controller and is connected with the inflow control mechanism, a yield increasing channel used for communicating the inside and the outside of the base pipe is arranged on the yield increasing inflow controller, and the yield increasing inflow controller controls the opening or closing of the yield increasing channel according to the production differential pressure or the set specified opening differential pressure; and

and the fluid injection one-way flow device is used for ensuring that the liquid injected from the wellhead can only flow into the stratum from the inside of the base pipe in one direction.

The automatic inflow water control device further comprises a screen pipe for sand control, and the screen pipe is installed on the base pipe.

The automatic inflow water control device, wherein the fluid injection one-way flow device is mounted on the base pipe or the screen pipe.

The above automatic inflow water control device, wherein the adaptive inflow controller comprises a valve body and a disc installed in the valve body, the channel is disposed on the valve body, and the relative position of the disc and the valve body is adjusted to control the opening of the channel according to the difference in viscosity of the fluid flowing through the valve body.

The automatic inflow water control device comprises a support flow guide disc, a rotatable balance disc and a locking nut, wherein an overflow groove and a flow guide pipe are arranged on the support flow guide disc, a throttling hole is correspondingly arranged on the balance disc, the relative position of the throttling hole and the flow guide pipe is adjusted by rotating the balance disc so as to control the overflow quantity of the overflow groove, and the locking nut is used for locking the balance disc.

In the automatic inflow water control device, the throttle hole is provided with a tungsten alloy oil nozzle.

The automatic inflow water control device comprises a valve body, a floating disc, a condition control valve and a production increasing shell, wherein the floating disc is arranged in the valve body, the production increasing shell is arranged on the valve body, the condition control valve is arranged between the production increasing shell and the valve body, and the production increasing shell is provided with a production increasing through hole communicated with the valve body.

The automatic inflow water control device is characterized in that the valve body comprises an upper shell, a lower shell and a shell, the upper shell and the lower shell are respectively installed on the shell, the floating disc is arranged between the upper shell and the lower shell, the upper shell is provided with an upper through hole, the lower shell is provided with a lower through hole, and the yield increasing through hole, the upper through hole and the lower through hole jointly form the yield increasing channel.

In the automatic inflow water control device, an inflow adjusting ring is further arranged between the production increasing sleeve and the sieve tube.

In order to better achieve the above object, the present invention further provides an automatic inflow water control method, wherein the automatic inflow water control device is used for controlling water in the whole production cycle of an oil well, and the method comprises the following steps:

s100, during conventional flow-limiting production, fluid enters a flow channel between a yield increasing sleeve and a base pipe of a yield increasing inflow control mechanism through an inflow adjusting ring, flows into the self-adaptive internal flow control mechanism through the inflow control mechanism, enters the base pipe through the self-adaptive internal flow controller and then flows out of the ground;

s200, during production increasing, the ground increases the production pressure difference, fluid enters a flow channel between a production increasing sleeve of the production increasing inflow control mechanism and the base pipe through the inflow adjusting ring, after the production pressure difference is increased to a certain pressure, a production increasing inflow controller of the production increasing inflow control mechanism is opened, and the fluid enters the base pipe through the production increasing inflow controller and flows out to the ground; fluid simultaneously flows into the self-adaptive inner flow control mechanism from a flow passage between the stimulation sleeve and the base pipe through the inflow control mechanism, enters the base pipe through the self-adaptive inner flow controller, then flows out to the ground, and controls water while increasing the productivity; and

s300, when liquid needs to be injected into the stratum, fluid is injected into the fluid injection one-way flow device through the base pipe, flows through the inflow adjusting ring through the fluid injection one-way flow device and is extruded into the stratum through the sieve tube filter sleeve, and the injection operation is completed.

The invention has the beneficial effects that:

aiming at the defects of the prior art, the invention can control water in the whole production period, increase the yield and inject liquid, can automatically control the inflow of fluid according to the characteristics of the fluid, balance the production liquid profile, realize the active water control and oil stabilization production which are simple and easy to operate, cover the whole production period of an oil well by the water control and oil increase effects, improve the liquid yield according to the requirements of operators in the later period, can also inject acid to increase the yield, and can automatically close a yield increase channel without increasing the yield.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic representation of a downhole tubular string arrangement according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an automatic inflow water control device according to an embodiment of the present invention (in a normal flow-limiting state);

FIG. 3 is a schematic structural view of an automatic inflow water control device according to an embodiment of the present invention (in a stimulation and flow-limiting state);

FIG. 4 is a schematic structural diagram of an automatic inflow water control device according to an embodiment of the present invention (liquid injection state);

figure 5 is a schematic diagram of a stimulation inflow controller configuration according to an embodiment of the invention.

Wherein the reference numerals

1 floor

2 oil pipe

3 top packer

4 well bore

5 automatic inflow water control device

51 base pipe

52 self-adaptive internal flow control mechanism

521 self-adaptation overcoat

522 adaptive internal flow controller

53 inflow control mechanism

54 yield increasing inflow control mechanism

541 yield increasing sleeve

542 yield increasing inflow controller

5421 Condition control valve

5422 casing for increasing yield

5423 Upper Shell

5424 Floating disc

5425 lower case

5426 outer case

55 fluid injection one-way flow actuator

56 inflow adjusting ring

57 screen pipe

6 middle packer

7 guide shoe

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

referring to fig. 1 and 2, fig. 1 is a schematic diagram of a downhole string according to an embodiment of the present invention, and fig. 2 is a schematic diagram of an automatic inflow water control device 5 according to an embodiment of the present invention (in a normal flow-limiting state). The automatic inflow water control device 5 can increase production and inject liquid, a plurality of the devices are connected together and combined to be put into a well, the whole pipe column is communicated with the ground 1 through an oil pipe 2, a top packer 3 and a middle packer 6 (such as an open hole packer or a continuous packer) divide a well hole 4 into a plurality of sections according to well conditions, and a guide shoe 7 guides the pipe column to be put into and sealed. The automatic inflow water control device 5 includes: one end of the base pipe 51 is communicated with the ground 1 through an oil pipe 2, and the other end of the base pipe 51 is provided with a guide shoe 7 for guiding the pipe column to descend and seal; the self-adaptive inner flow control mechanism 52 (which is a core part, namely, an Autonomous inflow control device, AICD for short) comprises a self-adaptive inner flow controller 522 and a self-adaptive outer sleeve 521, wherein the self-adaptive inner flow controller 522 is embedded and installed on the base pipe 51 and is a channel for communicating fluid inside and outside the pipe, the self-adaptive outer sleeve 521 is sleeved outside the base pipe 51 corresponding to the self-adaptive inner flow controller 522, the self-adaptive inner flow controller 522 is provided with a channel for communicating the inside and the outside of the base pipe 51, according to the principle that the sum of the dynamic pressure and the local pressure loss of fluid in a Bernoulli equation is constant, the viscosity of the fluid flowing through the self-adaptive inner flow controller 522 is changed correspondingly, the opening of the channel is adjusted by controlling the opening of a disc in a valve body to automatically limit the flow, and the main body structure is manufactured by wear resistance of tungsten carbon hard alloy and the like, and has the characteristics of temperature resistance and high temperature resistance, Pressure resistance and corrosion resistance. The quantity of AICDs can be changed according to the oil reservoir information and the capacity target; the inflow control mechanism 53 is sleeved on the base pipe 51 and is connected with the self-adaptive outer sleeve 521; a stimulation inflow control mechanism 54 which comprises a stimulation sleeve 541 and a stimulation inflow controller 542, wherein the stimulation inflow controller 542 is installed on the base pipe 51, the stimulation jacket is sleeved on the base pipe 51 corresponding to the stimulation inflow controller 542 and is connected with the inflow control mechanism 53, a stimulation channel for communicating the inside and the outside of the base pipe 51 is arranged on the stimulation inflow controller 542, and the stimulation inflow controller 542 controls the opening or closing of the stimulation channel according to the production differential pressure or the set designated opening differential pressure; and a fluid injection one-way flow actuator 55, which is a one-way flow valve and can be automatically closed during production, and is used for ensuring that liquid injected from a wellhead can only flow to the outside from the inside of the base pipe 51 in one direction and enters the stratum. The fluid injected from the wellhead can be acid liquor or water and other fluids, and the functions of plugging removal or water injection profile control and the like are realized. The number and the position of the adaptive internal flow controller 522, the stimulation inflow controller 542 and the fluid injection unidirectional flow device 55 on the base pipe 51 can be set according to the needs, and are not limited to the positions shown in the figure, that is, the number can be increased or decreased according to the needs, and the positions can be interchanged.

In this embodiment, a screen 57 for sand control may also be included and mounted on the base pipe 51. The screen 57 comprises a filter sleeve that is fitted over the base pipe 51. The filter sleeve comprises an outer protective sleeve, a filter sleeve and an inner protective sleeve. The filter sleeve is composed of a plurality of layers of filter screens, the sizes of the filter screen holes can be set according to the actual information of the stratum, and the filter screens are arranged according to a certain rule so as to meet the requirements of various oil reservoirs. If sand control is not required for the well, the screen 57 may not be installed. Wherein the fluid injection one-way flow actuators 55 can be installed on the base pipe 51 or the screen 57, and the number of the fluid injection one-way flow actuators 55 can be changed according to the operation requirement. The fluid injection one-way flow actuator 55 may be installed at a plurality of locations including the filter stage. An inflow adjustment ring 56 may also be provided between the stimulation sleeve 541 and the screen 57. The adaptive internal flow controller 522 includes a valve body and a disc installed in the valve body, the channel is disposed on the valve body, and the relative position of the disc and the valve body is adjusted to control the opening of the channel according to the difference in viscosity of the fluid flowing through the valve body. Inflow control mechanism 53(ICD) is including supporting the guiding disk, rotatable equalizing dish and lock nut, it is provided with overflow groove and honeycomb duct to support on the guiding disk, be provided with the orifice on the equalizing dish correspondingly, through rotatory the equalizing dish adjust the orifice with the relative position of honeycomb duct is in order to control the overflow volume in overflow groove, lock nut is used for locking the equalizing dish. The throttle hole may be provided with a tungsten alloy oil nipple. Before operation, the balance disc can be rotated according to the requirement to adjust the number of the blocking holes so as to control the over-flow of the sieve tube 57, and then the balance disc is locked by a locking nut.

Referring to fig. 2 to 4, fig. 2 is a schematic structural view (normal flow-limiting state) of an automatic inflow water control device 5 according to an embodiment of the present invention, fig. 3 is a schematic structural view (yield-increasing flow-limiting state) of an automatic inflow water control device 5 according to an embodiment of the present invention, and fig. 4 is a schematic structural view (liquid-filling state) of an automatic inflow water control device 5 according to an embodiment of the present invention. During conventional flow-limiting production, formation fluid flows through a filter sleeve of the sieve tube 57 (the sieve tube 57 may not be arranged in a non-sand-prevention formation), the fluid filtered by the sieve tube 57 enters the inflow adjusting ring 56, then flows through the production increasing sleeve 541, then flows through the inflow control mechanism 53, then enters the inner cavity of the adaptive outer sleeve 521, enters the base pipe 51 after being regulated by the adaptive inner flow controller 522, and finally flows out to the ground 1. When stimulation is desired, fluid enters the interior of the basepipe 51 from both the adaptive inflow controller 522 and the stimulation inflow controller 542 locations by raising the production differential pressure or otherwise opening the stimulation inflow control mechanism 54 and is then produced to the surface 1. The productivity is improved according to the demand. When the stratum needs to be injected with liquid, the liquid injection path is that the liquid on the ground 1 enters the fluid injection one-way flow device 55 through the injection pipe column and then flows through the filter sleeve of the sieve pipe 57 to be extruded into the stratum, and the injection operation is finished.

Referring to FIG. 5, FIG. 5 is a schematic illustration of a stimulation inflow controller 542 according to an embodiment of the invention. The stimulation inflow controller 542 may be configured the same as the adaptive inflow controller 522 except that the stimulation inflow controller 542 has a larger inflow aperture, higher capacity, and the ability to adjust the AICD switch based on differential production pressure or other control conditions. For example, a predetermined opening pressure difference may be set when the stimulation inflow controller 542 is processed, and when the production pressure is higher than the opening pressure difference, the stimulation inflow controller 542 may be opened to perform an automatic inflow control state, thereby improving the fluid production capacity of the oil well. The stimulation inflow controller 542 automatically closes when the production pressure is less than the cracking pressure. The number of stimulation inflow controllers 542 may be altered based on the reservoir information and the capacity target. The stimulation inflow controller 542 of this embodiment includes a valve body, a floating disc 5424, a condition control valve 5421, and a stimulation housing 5422, the floating disc 5424 is disposed in the valve body, the stimulation housing 5422 is mounted on the valve body, the condition control valve 5421 is disposed between the stimulation housing 5422 and the valve body, and is an elastic deformation element, and is an elastic return disc in this embodiment, and is not limited to the illustrated structure, and may be a spring return structure or other structures that change according to conditions, a stimulation through hole communicating with the valve body is disposed in the stimulation housing 5422, and when the condition control valve 5421 is in an open state, fluid flows in through the stimulation through hole. Under the external pressure, the elastic reset disc deforms and is separated from the inlet end of the through hole of the stimulation housing 5422, the stimulation inflow controller 542 is kept in an open state, and after the external pressure is removed, the elastic reset disc is restored and is combined with the inlet end of the through hole of the stimulation housing 5422 for sealing, and the stimulation inflow controller 542 is kept in a closed state. The stimulation housing 5422, in cooperation with the conditioning valve 5421, determines whether the stimulation inflow controller 542 is open or closed. The valve body comprises an upper shell 5423, a lower shell 5425 and an outer shell 5426, wherein the upper shell 5423 and the lower shell 5425 are respectively installed on the outer shell 5426, the floating disc 5424 is arranged between the upper shell 5423 and the lower shell 5425, the floating disc 5424 is an AICD flow control element, and the inflow of fluid can be limited by adjusting the position of the disc according to the viscosity property characteristics and the like of the fluid. The upper case 5423 is provided with an upper through hole, the lower case 5425 is provided with a lower through hole, and the yield increasing channel is formed by the yield increasing through hole, the upper through hole and the lower through hole together. Normally, the condition control valve 5421 and the stimulation housing 5422 are sealed, and fluid cannot flow in. When subjected to pressure or other condition changes, the condition control valve 5421 may deform and disengage from the stimulation housing 5422 and fluid may enter the interior of the stimulation inflow controller 542 from the through-holes of the stimulation housing 5422. The stimulation inflow controller 542 has a large flow path and has a certain AICD flow restriction effect.

The automatic inflow water control method of the present invention adopts the above automatic inflow water control device 5 to control water in the production cycle of the whole oil well, wherein the dotted arrows in fig. 2-4 indicate the flow direction of fluid in the corresponding production state, and the water control method of the water control device specifically comprises the following steps:

step S100, during conventional flow-limiting production (see FIG. 2), formation fluid enters a flow channel between a production sleeve 541 of a production increase inflow control mechanism 54 and a base pipe 51 through an inflow adjusting ring 56, automatically flows into an adaptive internal flow control mechanism 52 through an inflow control mechanism 53, enters the interior of the base pipe 51 after being regulated and controlled by an adaptive internal flow controller 522, and then flows out to the ground 1;

step S200, increasing production time (see fig. 3), opening the stimulation inflow control mechanism 54 by increasing the production differential pressure or otherwise, allowing fluid to pass through the screen 57 for filtration (the screen 57 may be removed from the non-sand-control formation), flow into the adjustment ring 56, enter the flow path between the stimulation sleeve 541 of the stimulation inflow control mechanism 54 and the basepipe 51, opening the stimulation inflow control device 542 of the stimulation inflow control mechanism 54 by increasing the production differential pressure, and allowing fluid to enter the basepipe 51 through the stimulation inflow control device 542 and flow out to the ground 1; fluid simultaneously flows into the adaptive inner flow control mechanism 52 from a flow passage between the stimulation sleeve 541 and the base pipe 51 through the inflow control mechanism 53, enters the interior of the base pipe 51 through the adaptive inner flow controller 522, then flows out to the ground 1, and can control water while increasing the productivity; and

step S300, when the stratum needs to be injected with liquid (see figure 4), the fluid is injected into the fluid injection one-way flow device 55 through the base pipe 51, the fluid injection one-way flow device 55 flows through the inflow adjusting ring 56, and is extruded into the stratum through the filter sleeve of the screen pipe 57, and the injection operation is completed.

The invention has the following advantages:

1. the water control function of the water control device covers the whole production period of the oil well, including the early production period and the middle and later production periods of the oil well, and improves the recovery rate of the crude oil in the stratum;

2. the water control device can perform later-stage production increasing measures according to application requirements, the requirement that the daily yield is more than 20000 barrels per day is met, the production increasing inflow device is automatically closed without high-yield production, and the capacity target cannot be realized by a common AICD water control sieve tube;

3. this water control device can realize operations such as acid injection water injection in later stage according to the practical application demand.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.