Infinitely-segmented sand control and water control well completion process pipe column and method

Abstract

The invention belongs to the technical field of petroleum engineering, and discloses an infinitely-segmented sand control and water control well completion process pipe column and method. The infinite segmented sand control and water control well completion process pipe column comprises a sand control top packer assembly, a plurality of segmented screen pipe assemblies and a float shoe assembly which are sequentially connected through blind pipes from top to bottom, each segmented screen pipe assembly comprises a shape memory packer and a water control screen pipe provided with a water control valve, and the shape memory packers and the water control screen pipes are connected through the blind pipes. An annular space between the infinite segmented sand control and water control well completion process pipe column and the well wall is filled with a water blocking proppant. According to the infinitely-segmented sand control and water control well completion process pipe column and method, the purposes that pipe column tripping-in is not limited, the packing effect of a filling well is good, and an adjusting function is achieved in the middle and later periods can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum engineering, and in particular to an infinitely segmented sand and water control well completion process pipe string and method. Background Art

[0002] Most domestic oilfield development has entered the middle and late stages, and there are widespread problems of high water content and high recovery. How to control the rate of increase in water content and extend the production time of oil wells is one of the main problems facing current oilfield development. The water control principle of the segmented water control completion process is mainly to divide the oil well production section into several mutually isolated production sections in the axial direction, and use the flow control column to control the flow velocity of each section in the radial direction to achieve the purpose of balancing the flow velocity profile of each section. At present, the radial control means are basically the same, and the commonly used axial segmentation methods include mechanical packers, coated water-blocking ceramsite, chemical gel segment plugs, etc.

[0003] The mechanical packer segmentation method uses a swelling packer or an expandable packer to isolate two adjacent production sections. This method is limited by the difficulty of lowering the packer, so the number of packers lowered in a single well is limited. It is not suitable for production wells that require fine segmentation. In addition, for loose sandstone formations that are prone to sand production, mechanical segmented water control completion can only rely on filter screens to block sand, and its sand prevention ability is relatively weak.

[0004] The segmented method of coated water-blocking ceramsite utilizes the water-blocking properties of ceramsite to increase the flow resistance of water between densely packed ceramsite and inhibit the axial crossflow intensity of water. This method is similar to the gravel packing sand control completion technology and has a good sand control effect. However, this method does not establish a segmented mechanism on the sand control column. When the water control strategy needs to be adjusted in the middle and late stages, segmentation cannot be achieved in the sand control column, and the adjustability is poor.

[0005] The segmented filling sand control and water control method combines the advantages of mechanical segmentation and coated water-blocking ceramsite segmentation, but the small bypass channel of the segmented filling packer leads to large friction resistance during filling, which restricts the filling displacement and efficiency. In addition, the bypass channel is easily blocked by ceramsite, resulting in complex situations such as sand jamming of downhole tools.

[0006] The chemical gel plug segmentation method achieves axial isolation through the non-permeability of the gel plug. This method requires an additional trip to the drill hole, and the gel is affected by many factors such as downhole temperature, mineralization, reservoir permeability, faults, etc. The isolation effect is difficult to judge and the cost is high.

[0007] In view of the above problems, there is currently no packer that can achieve unrestricted lowering of the string, good isolation effect of the filling well, and a segmented water control completion string and method with adjustment function in the middle and late stages. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention proposes an infinitely segmented sand and water control completion process string and method that can achieve unrestricted running of the string, good well filling and isolation effect, and an adjustment function in the middle and late stages.

[0009] The infinitely segmented sand and water control completion process string according to the present invention comprises: a sand control top packer assembly, a plurality of segmented screen pipe assemblies and a floating shoe assembly which are sequentially connected through blind pipes from top to bottom, the segmented screen pipe assembly comprises a shape memory packer connected through blind pipes and a water control screen pipe provided with a water control valve, wherein the annulus between the infinitely segmented sand and water control completion process string and the well wall is filled with a water blocking proppant.

[0010] Furthermore, the water control screen is replaced by a sand control screen, and the infinitely segmented sand control and water control completion process string also includes a central flow control completion string inserted therein, the central flow control completion string includes a production packer assembly, multiple flow control assemblies and a plug connected from top to bottom through the production oil pipe, the flow control assembly includes a flow control component and an inserted seal connected through the production oil pipe, wherein the flow control component is a sliding sleeve or a flow control nipple, a water control valve is installed on the flow control nipple, and the inserted seal is sealed and fitted in the shape memory packer.

[0011] Furthermore, the water-blocking proppant is a high molecular polymer proppant, and the density of the water-blocking proppant is in the range of 0.6-1.2 g / cm3.

[0012] Furthermore, the shape memory packer includes a packer base and a shape memory sleeve sleeved on the packer base, the shape memory sleeve is made of a shape memory polymer material, and a soluble protective sleeve is provided on the outer surface of the shape memory sleeve, the soluble protective sleeve is configured to dissolve after a specific period of time to expose the shape memory sleeve, and the shape memory sleeve expands under the temperature conditions downhole to seal the annulus between the shape memory packer and the well wall.

[0013] Furthermore, the shape memory polymer material is wrapped with polyurethane activation powder.

[0014] Furthermore, the length of a single shape memory packer ranges from 10 to 15 m.

[0015] According to the infinite segmented sand control and water control completion process method of the present invention, the infinite segmented sand control and water control completion process string is used, which includes the following steps: Step 1: Determine the number and position of the segments according to the logging interpretation results of the reservoir permeability and fluid saturation; Step 2: Determine the aperture and quantity distribution of the water control valve according to the production system prediction or the production data of the adjacent well, and install the water control valve on the water control screen or the flow control short joint; Step 3: Run the infinite segmented sand control and water control completion process string and the filling service string to the designed position, so that the top packer is set, tested and released; Step 4: Use The completion fluid is tested for positive circulation, and the downhole leakage rate is calculated. Step 5: Use the filling service string to fill the annulus between the infinitely segmented sand and water control completion process string and the well wall with a water-blocking proppant with a preset sand ratio, gradually increase the injection displacement and the sand-dropping speed of the water-blocking proppant, and when the pumping pressure approaches the preset limit pressure, pump with a gradually reduced pumping displacement in steps; Step 6: When the sand-out pressure is reached, the filling service string stops working immediately, and the completion fluid is injected in a reverse circulation to clean the filling service string; Step 7: Pull out the filling service string and lower the central flow control completion string.

[0016] Furthermore, in step five, the sand ratio is the ratio of the mass of the water-blocking proppant to the volume of the completion fluid, and the preset sand ratio range is: 0.2-0.5 PPG.

[0017] Furthermore, in step five, the sand ratio is 0.2PPG, and when the pumping pressure approaches the preset limit pressure, the pumping displacement is gradually reduced in steps of 1bbl / min.

[0018] Furthermore, the infinitely segmented sand and water control completion process also includes step eight: installing wellhead equipment after the completion operation is completed, and starting the well for production after the shape memory packer is deformed.

[0019] Compared with the prior art, the infinitely segmented sand and water control completion process string and method of the present invention have the following advantages:

[0020] 1) The outer diameter of the shape memory packer can be comparable to the size of the completion string. It is suitable for segmented isolation in special situations such as large well deviation, large dogleg, and complex wellbore trajectory. It is easy to put in and has no quantity limit. It can achieve unlimited segmented sand control and water control integrated effects with water-blocking proppant;

[0021] 2) Compared with the existing segmented packing technology, the infinite segmented sand and water control completion process proposed in the present invention has no bypass channel or other shrinkage, and the filling process is safer. A higher filling displacement can be used, which significantly improves the operation efficiency.

[0022] 3) The infinitely segmented sand and water control completion process proposed in the present invention can achieve the sand control effect of gravel packing, and at the same time has the function of adjusting the water control strategy in the middle and late stages, which is suitable for the sand and water control needs of the oil well throughout its life cycle;

[0023] 4) The packer has a simple sealing method, which does not require the use of setting tools or the injection of high-pressure liquids, making the operation safer and more efficient;

[0024] 5) The infinite segmented sand and water control completion process proposed in the present invention not only establishes isolation between annular segments or layers, but also cooperates with water-blocking proppants to achieve axial water blocking within segments and layers, thereby achieving an infinite segmented sand and water control integrated effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an infinitely segmented sand and water control completion process string according to an embodiment of the present invention;

[0026] Figure 2 For use in Figure 1 The schematic diagram of the structure of the central flow control completion string in the infinitely segmented sand and water control completion string is shown;

[0027] Figure 3 It is a schematic diagram of the structure of the infinitely segmented sand and water control completion process string after completion according to an embodiment of the present invention, which shows the shape of the shape memory packer after completion. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] Figure 1 The structure of the infinitely segmented sand and water control completion process string 100 according to an embodiment of the present invention is shown. Figure 1 As shown, the infinite segmented sand and water control completion process string 100 may include: a sand control top packer assembly 101, a plurality of segmented screen assemblies 110 and a floating shoe assembly 105 connected sequentially from top to bottom through a blind pipe 102. The segmented screen assembly 110 may include a shape memory packer 104 connected through the blind pipe 102 and a water control screen 103 provided with a water control valve 106. Figure 3 As shown, the annulus 108 between the infinitely segmented sand and water control completion technology string 100 and the well wall 120 is filled with water-blocking proppant 107 .

[0030] The infinitely segmented sand and water control completion process string 100 of the embodiment of the present invention adopts a shape memory packer 104 to replace the existing mechanical segmented packers and segmented filling packers. The outer diameter size of the shape memory packer 104 can be comparable to the size of the completion string, and is suitable for segmented isolation in special situations such as large well inclination, large doglegs, and complex wellbore trajectories. It is easy to lower and has no quantity limit. At the same time, the isolation method of the shape memory packer 104 is simple. It can be set in the well based on the ambient temperature downhole. There is no need to lower a setting tool or inject high-pressure liquid. The operation is safe and more efficient. The shape memory packer 104 can achieve more reliable and convenient isolation of the completion string and the annulus of the formation or casing. The produced fluids of each section or layer of the production well cannot flow through the packer to other production sections or production layers. In addition, the infinitely segmented sand and water control completion process string 100 of the embodiment of the present invention is also filled with water-blocking proppants 107 in the production section established between adjacent shape memory packers 104, so that when the water phase fluid in the formation production fluid flows axially in the annulus 108, the flow resistance through the water-blocking proppants becomes larger, thereby suppressing its cross-flow within the section / layer, and prompting the water phase fluid to flow into the water control screen 103 only in the radial direction, thereby realizing approximately fine segmentation within each section / layer and achieving the purpose of infinitely segmented sand and water control.

[0031] In such Figure 2 In the preferred embodiment shown, the water control screen 103 is replaced by a sand control screen, and the infinitely segmented sand control and water control completion process string 100 may also include a central flow control completion string 200 inserted therein, and the central flow control completion string 200 may include a production packer assembly 201, a plurality of flow control assemblies 210 and a plug 205 connected from top to bottom through a production tubing 202, and the flow control assembly 210 may include a flow control component 203 and an inserted seal 204 connected through the production tubing 202, wherein the flow control component 203 may be a sliding sleeve or a flow control nipple, a water control valve is installed on the flow control nipple, and the inserted seal 204 is sealed and fitted in the shape memory packer 104.

[0032] In this embodiment, when a sand control screen is used instead of the water control screen 103, since the sand control screen does not have the function of fluid regulation, in order to strengthen the radial control of the produced fluid, a central flow control completion string 200 needs to be lowered into the sand control completion string. The sleeve in the central flow control completion string 200 can adjust the opening size, and the flow control nipple can be installed with a flow control device, such as various types of water control valves such as ICD, AICD, and C-AICD, so as to establish segmented / layered control in the infinitely segmented sand control and water control completion process string 100, and use a sleeve or a flow control nipple to achieve radial flow control. When using Figure 1When the water control screen 103 is shown, there is no need to lower the central flow control completion string 200 into the infinitely segmented sand and water control completion process string 100, or the lowered central flow control completion string 200 does not need to be equipped with a flow control component 203. The purpose of radial flow limitation can be achieved by relying solely on the water control valve 106 on the water control screen 103.

[0033] According to the present invention, the water-blocking proppant 107 may be a polymer proppant, and the density of the water-blocking proppant 107 is preferably in the range of 0.6-1.2 g / cm3. The density of the water-blocking proppant 107 is equivalent to the density of brine or seawater, and can exist in the liquid in a suspended state. During the filling process and after the filling operation is completed, the annulus 108 outside the shape memory packer 104 is always filled with sand-carrying fluid.

[0034] According to the present invention, in a preferred embodiment, the shape memory packer 104 may include a packer base and a shape memory sleeve sleeved on the packer base, the shape memory sleeve is made of a shape memory polymer material, and a soluble protective sleeve is provided on the outer surface of the shape memory sleeve, the soluble protective sleeve is configured to dissolve after a specific time to expose the shape memory sleeve, and the shape memory sleeve expands under the temperature conditions downhole to seal the annulus 108 between the shape memory packer 104 and the well wall 120.

[0035] In this embodiment, the shape memory sleeve of the shape memory packer 104 is made of a shape memory polymer material, which is pressed into a sleeve-like structure at room temperature and connected to the packer base. The shape memory sleeve can be installed on the packer base in a whole section or in sections according to needs and manufacturing processes. A soluble protective sleeve is installed outside the shape memory sleeve, and the dissolution time of the protective sleeve can be changed according to the single well operation time, completion requirements, etc., thereby controlling the deformation time of the shape memory sleeve. The outer diameter of the shape memory sleeve can be customized, that is, the compression ratio and deformation rate of the polymer material can be changed so that it is always equivalent to the outer diameter of the infinite segmented sand control and water control completion process string 100, avoiding the problem of difficulty in lowering caused by the expansion of the outer diameter of the string, and increasing the number of sections. At the same time, since there is no radial liquid flow channel on the shape memory packer 104, the annulus 108 outside the shape memory packer 104 will be filled with mortar after the filling operation is completed. After the completion operation, when the shape memory sleeve is heated and deformed underground, the water-blocking proppant 107 in the annulus 108 is wrapped in the expansion material to achieve sand isolation. The deformation temperature range is preferably 50-80°C, and the deformation time is preferably 48-60h. The amount of foaming agent used in the delayed shape memory sleeve can be adjusted according to the bottom hole temperature to achieve the purpose of extending or shortening the deformation time.

[0036] Preferably, the shape memory polymer material contains polyurethane activation powder, which is released to form an adhesive when in contact with hot water, and fills the pores of the water-blocking proppant 107 to form an impermeable cement, thereby enhancing the sealing effect.

[0037] Preferably, the length of a single shape memory packer 104 is preferably in the range of 10-15 m, and more preferably 12 m, to avoid the problem that a high screenout pressure causes a densely packed gravel layer to form outside the shape memory packer 104, thereby affecting the isolation effect.

[0038] According to the infinite segmented sand control and water control completion process method of the present invention, the infinite segmented sand control and water control completion process string 100 is used, which may include the following steps: Step 1: Determine the number and position of the segments according to the logging interpretation results of the reservoir permeability and fluid saturation; Step 2: Determine the aperture and quantity distribution of the water control valve 106 according to the production system prediction or the production data of the adjacent well, and install the water control valve 106 on the water control screen 103 or the flow control short joint; Step 3: Lower the infinite segmented sand control and water control completion process string 100 and the filling service string to the designed position, so that the top packer 101 is seated, tested and released; Step 4: Use the completion fluid to perform a positive circulation test and calculate the downhole leakage rate; Step 5: Use the filling service string to the infinite segmented sand control and water control completion process string 100. The annulus 108 between the tubing string 100 and the wellbore 120 is filled with a water-blocking proppant 107 with a preset sand ratio, and the injection displacement and the sand-dropping speed of the water-blocking proppant 107 are gradually increased. When the pumping pressure approaches the preset limiting pressure, pumping is performed with a step-by-step decreasing pumping displacement, so as to achieve the situation where the pumping pressure is always kept lower than the limiting pressure during the entire filling process, and the sand-carrying fluid is pumped at the maximum displacement; Step six: When the stripping pressure is reached, the filling service tubing string is immediately stopped, and the completion fluid is injected in a reverse circulation to clean the filling service tubing string; the reverse circulation process can inject the completion fluid at a displacement of 2bbl / min until there is no water-blocking proppant 107 in the liquid returned from the wellhead and then the pump is stopped; Step seven: Pull out the filling service tubing string and lower the central flow control completion tubing string 200.

[0039] The infinite segmented sand control and water control completion process method of the embodiment of the present invention adopts a shape memory packer 104 to replace the existing mechanical segmented packer and segmented filling packer to isolate the completion string from the annulus of the formation or casing, so that the produced fluid of each section or layer of the production well cannot flow through the packer to other production sections or production layers. At the same time, the water-blocking proppant 107 is filled in the production section established between adjacent shape memory packers 104, and its hydrophobic characteristics are used to increase the axial flow of the water phase fluid in the annulus, so as to achieve the approximate fine segmentation in each section / layer, and achieve the purpose of infinite segmented sand control and water control. The shape memory packer 104 does not expand during the process of lowering the infinite segmented sand control and water control completion process string 100 and filling the water-blocking proppant 107. When the shape memory packer 104 expands after filling, the shape memory material can embed the proppant in the annulus 108 into the material without affecting the sealing effect. Compared with the existing segmented packer filling technology, the infinite segmented sand control and water control completion process method of the embodiment of the present invention has no bypass channel or other shrinkage, the filling process is safer, and a higher filling displacement can be used, which significantly improves the operating efficiency.

[0040] In a preferred embodiment, in step five, the sand ratio is the ratio of the mass / lbs of the water blocking proppant to the volume / gal of the completion fluid, and the preset sand ratio range is: 0.2-0.5 PPG.

[0041] Further preferably, in step five, the sand ratio is 0.2PPG, and when the pumping pressure approaches a preset limit pressure, the pumping displacement is gradually reduced in steps of 1bbl / min.

[0042] According to the present invention, the infinitely segmented sand and water control completion process may further include step eight: installing wellhead equipment after the completion operation is completed, and starting the well for production after the shape memory packer 104 is deformed.

[0043] The specific embodiment of the infinite segmented sand control and water control completion process according to the present invention is given below. The offshore B7H well is a horizontal well, the production layer is a loose sandstone bottom water reservoir, the horizontal production section length is 675m, the maximum well inclination is 90°, and the maximum dogleg is 6.38° / 30m. The initial daily liquid production of the B7H well is designed to be 300m3 / d, and the medium-term maximum daily liquid production is 1500m3 / d. According to the logging interpretation results, the reservoir permeability in the middle part of the B7H well is high and close to the bottom water, so the middle part needs to be finely blocked and controlled. And the entire horizontal section is highly heterogeneous. In order to improve the water control effect, the production section is divided into 6 sections for water control, and the flooded section is plugged after the middle part is flooded in the later stage. In order to improve the water control effect, ICD water control valve is used. According to the physical properties of the reservoir, the aperture distribution of the water control valves on each production section is designed to be 5mm*7 + 4mm*9 + 2.5mm*11 + 3mm*9 + 4mm*8 + 5mm*7 from bottom to top, and an ICD water control valve is installed on each water control screen pipe.

[0044] Since the well has a large dogleg and a large number of sections, the results of the analysis of the use of conventional segmented packing packers show that it is difficult to run and the pipe string is prone to buckling. Therefore, based on the production requirements of loose sandstone sand control and fine segmented water control, the infinite segmented sand control and water control completion process pipe string and method implemented by the present invention are adopted. The bottom temperature of the B7H well is 60°C, and the completion operation time is about 72 hours. Therefore, the expansion time of the shape memory sleeve is designed to be 80 hours to ensure that the shape memory packer 104 will not start to expand until the filling operation is completed.

[0045] After the scraping and well washing is completed, an infinite segmented sand control and water control completion process string 100 is assembled, which includes, from bottom to top, 5-1 / 2in floating shoe assembly 3m+5-1 / 2" water control screen 90m+1# shape memory packer 12m+5-1 / 2" water control screen 107m+2# shape memory packer 12m+5-1 / 2" water control screen 130m+3# shape memory packer 12m+5-1 / 2" water control screen 114m+4# shape memory packer 12m+5-1 / 2" water control screen 98m+5# shape memory packer 12m+5-1 / 2" water control screen 88m+5-1 / 2" blind pipe short section 3m+9-5 / 8" top packer assembly 12m.

[0046] After the infinite segmented sand and water control completion process string 100 and the sand control service string are lowered into place and the top packer 101 is set, the gravel filling operation procedure is started. Filtered seawater is used as the completion fluid. After the circulation test, the pumping displacement is gradually increased at a speed of 2BPM, 4BPM, 6BPM, and 8BPM, and the sand ratio is always kept at 0.2PPG for sand filling. The safety pressure during filling is designed to be 10.34MPa according to the filling friction, net liquid column pressure, formation fracture pressure, etc. The water-blocking proppant 107 has a low density and good suspension in the completion fluid during filling. Its accumulation law is gradually accumulated from the toe end to the heel end. As the water control screen pipe that can return liquid gradually decreases, the filling pressure gradually increases at a certain filling displacement. Therefore, during the filling process, when the pressure approaches the safety pressure, the displacement is gradually reduced by 1BPM until the sand removal pressure is reached. Lift the service tool to the reverse circulation process, and inject the completion fluid at a displacement of 2 BPM in reverse circulation until the return fluid does not contain the water-blocking proppant 107. Then stop the reverse circulation and pull out the service string. Install and lower the central flow control completion string 200, and set the production packer 201 after it is in place. Pull out the drill, transfer to the upper completion operation, and wait for production.

[0047] The middle trajectory of B7H well sinks, which is close to the bottom water and has high permeability, posing a greater risk of flooding. The intelligent control sleeve is lowered using the central flow control completion string 200. After the middle part is flooded in the later stage, this section can be closed to reduce the water content of the oil well.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An infinitely segmented sand and water control completion process string, characterized in that: include: A sand control top packer assembly, a plurality of segmented screen pipe assemblies and a floating shoe assembly are connected in sequence from top to bottom through blind pipes, wherein the segmented screen pipe assembly includes a shape memory packer connected through a blind pipe and a water control screen pipe provided with a water control valve, wherein the annulus between the infinitely segmented sand control and water control completion process string and the well wall is filled with water-blocking proppant.

2. The infinitely segmented sand and water control completion process string according to claim 1 is characterized in that: The water control screen is replaced by a sand control screen, and the infinitely segmented sand control and water control completion process string also includes a central flow control completion string inserted therein, and the central flow control completion string includes a production packer assembly, multiple flow control assemblies and a plug connected from top to bottom through the production tubing in sequence, and the flow control assembly includes a flow control component and an inserted seal connected through the production tubing, wherein the flow control component is a sliding sleeve or a flow control nipple, a water control valve is installed on the flow control nipple, and the inserted seal is sealed and fitted in the shape memory packer.

3. The infinitely segmented sand and water control completion process string according to claim 1 or 2, characterized in that: The water-blocking proppant is a high molecular polymer proppant, and the density of the water-blocking proppant is in the range of 0.6-1.2 g / cm3.

4. The infinitely segmented sand and water control completion process string according to claim 1 or 2, characterized in that: The shape memory packer includes a packer base and a shape memory sleeve sleeved on the packer base, the shape memory sleeve is made of a shape memory polymer material, a soluble protective sleeve is provided on the outer surface of the shape memory sleeve, the soluble protective sleeve is configured to dissolve after a specific period of time to expose the shape memory sleeve, and the shape memory sleeve expands under the temperature conditions downhole to seal the annulus between the shape memory packer and the well wall.

5. The infinitely segmented sand and water control completion process string according to claim 4 is characterized in that: The shape memory polymer material is wrapped with polyurethane activation powder.

6. The infinitely segmented sand and water control completion process string according to claim 4, characterized in that: The length of a single shape memory packer is in the range of 10-15 m.

7. An infinitely segmented sand control and water control completion process method, using the infinitely segmented sand control and water control completion process string according to any one of claims 2 to 6, characterized in that: The following steps are involved: Step 1: Determine the number and location of segments based on the logging interpretation results of reservoir permeability and fluid saturation; Step 2: Determine the aperture and quantity distribution of the water control valve according to the production system forecast or the production data of the adjacent well, and install the water control valve on the water control screen or the flow control nipple; Step 3: Run the infinitely segmented sand and water control completion process string and the filling service string to the designed position, so that the top packer is set, tested and released; Step 4: Perform positive circulation test using completion fluid and calculate downhole leakage rate; Step 5: using the filling service string to fill the annulus between the infinite segmented sand and water control completion process string and the wellbore with the water-blocking proppant having a preset sand ratio, gradually increasing the injection displacement and the sand-feeding speed of the water-blocking proppant, and when the pumping pressure approaches the preset limiting pressure, pumping is performed with a gradually decreasing pumping displacement; Step 6: When the screenout pressure is reached, the packing service string stops working immediately, and reversely injects completion fluid to clean the packing service string; Step 7: Pull out the packing service string and run in the central flow control completion string.

8. The infinitely segmented sand and water control completion process according to claim 7 is characterized in that: In the step 5, the sand ratio is the ratio of the mass of the water-blocking proppant to the volume of the completion fluid, and the preset range of the sand ratio is: 0.2-0.5 PPG.

9. The infinitely segmented sand and water control completion process according to claim 8 is characterized in that: In the step five, the sand ratio is 0.2PPG, and when the pumping pressure approaches the preset limit pressure, the pumping displacement is gradually reduced in steps of 1bbl / min.

10. The infinitely segmented sand and water control completion process according to claim 7, characterized in that: The step also includes step eight: installing wellhead equipment after the completion of the well operation, and waiting for the shape memory packer to deform before starting the well for production.

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