An infinite segmented sand control and water control well completion process string and method

Abstract

The application belongs to the technical field of petroleum engineering, and discloses an unlimited segmented sand prevention and water control well completion process pipe column and method. The unlimited segmented sand prevention and water control well completion process pipe column comprises, from top to bottom, a sand prevention top packer assembly, a plurality of segmented screen pipe assemblies and a float shoe assembly connected through blind pipes in sequence. The segmented screen pipe assembly comprises a shape memory packer and a water control screen pipe provided with a water control valve and connected through a blind pipe. The annulus between the unlimited segmented sand prevention and water control well completion process pipe column and the well wall is filled with water blocking proppants. The unlimited segmented sand prevention and water control well completion process pipe column and method can achieve the purposes of unlimited pipe column running, good well sealing effect of filling and adjustment function in the middle and late stages.

Description

Technical Field

[0001] This invention relates to the field of petroleum engineering technology, specifically to an infinitely segmented sand control and water control well completion process string and method. Background Technology

[0002] Most domestic oilfields have entered the mid-to-late stages of development, generally facing problems of high water cut and high recovery rates. Controlling the rate of water cut increase and extending well production time are among the main challenges currently facing oilfield development. The water control principle of segmented water-controlled completion technology mainly involves dividing the well's production section into several isolated production sections axially, and using a flow control string to control the flow velocity in each section radially, achieving a balanced flow velocity profile across all sections. Currently, radial control methods are basically the same, while commonly used axial segmentation methods include mechanical packers, coated water-blocking ceramic particles, and chemical gel slugs.

[0003] The mechanical packer segmentation method uses expansion packers or dilatation packers to isolate two adjacent production sections. This method is limited by the difficulty of installing packers, so the number installed in a single well is limited. It is not suitable for production wells that require fine segmentation. Furthermore, for loose sandstone formations that are prone to sand production, mechanical segmentation water control completion can only rely on filter screens to block sand, which has a weak sand control capability.

[0004] The membrane-coated, water-blocking, ceramsite-segmented method utilizes the water-blocking properties of ceramsite to increase the flow resistance of the water phase between the densely packed ceramsite particles, thus suppressing the axial flow intensity of the water phase. This method is similar to gravel-packed sand control completion technology and has a good sand control effect. However, this method does not establish a segmentation mechanism on the sand control tubing, making it impossible to achieve segmentation within the sand control tubing when adjustments to the water control strategy are needed in the mid-to-late stages, resulting in poor adjustability.

[0005] The segmented packing method for sand and water control combines the advantages of mechanical segmentation and membrane-coated water-blocking ceramic particle segmentation. However, due to the small bypass channel of the segmented packer, the frictional resistance during packing is high, which restricts the packing discharge rate and efficiency. Furthermore, the bypass channel is easily blocked by ceramic particles, leading to complex situations such as sand jamming of downhole tools.

[0006] The chemical gel slug segmentation method achieves axial isolation through the non-permeability of the gel slug. However, this method requires an additional trip for drilling and tripping during operation. Furthermore, the gel is affected by various factors such as downhole temperature, salinity, reservoir permeability, and faults, making it difficult to determine the isolation effect and resulting in high costs.

[0007] To address the above issues, there is currently no packer or method that can achieve unrestricted tubing insertion, good packing effect in the filling well, and adjustment function in the mid-to-late stages of water control completion. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention proposes a process string and method for infinitely segmented sand control and water control well completion that enables unrestricted string insertion, good well filling and isolation effects, and adjustment capabilities in the mid-to-late stages.

[0009] The infinite segmented sand control and water control well completion process string according to the present invention includes: a sand control top packer assembly, multiple segmented screen pipe assemblies, and a float shoe assembly connected sequentially from top to bottom via blind pipes. The segmented screen pipe assembly includes a shape memory packer connected via blind pipes and a water control screen pipe equipped with a water control valve. The annulus between the infinite segmented sand control and water control well completion process string and the well wall is filled with a water-blocking proppant.

[0010] Furthermore, the water control screen is replaced with a sand control screen. The infinite segmented sand control and water control completion process string also includes a central flow control completion string inserted inside it. The central flow control completion string includes a production packer assembly, multiple flow control assemblies, and a plug connected sequentially from top to bottom through the production tubing. The flow control assembly includes a flow control component and an insertion seal connected through the production tubing. The flow control component is a sliding sleeve or a flow control short section. A water control valve is installed on the flow control short section. The insertion seal is sealed and fitted in the shape memory packer.

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

[0012] Furthermore, the shape memory packer includes a packer base and a shape memory sleeve fitted onto the packer base. The shape memory sleeve is made of 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. The shape memory sleeve expands under downhole temperature conditions to seal the annulus between the shape memory packer and the wellbore.

[0013] Furthermore, the shape memory polymer material contains polyurethane-based activating powder.

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

[0015] According to the infinite segmented sand control and water control completion process method of the present invention, the above-mentioned infinite segmented sand control and water control completion process string includes the following steps: Step 1: Determine the number and location of segments based on the well logging interpretation results of reservoir permeability and fluid saturation; Step 2: Determine the orifice diameter and quantity distribution of water control valves based on production system prediction or near-well production data, and install the water control valves on the water control screen or flow control short section; Step 3: Run the infinite segmented sand control and water control completion process string and the filling service string to the design position, so that the top packer is set, verified, and released; Step 4: Use Step 5: Using the filling service string, fill the annulus between the infinite segmented sand control and water control completion process string and the wellbore with a water-blocking proppant with a preset sand ratio, gradually increasing the injection rate and the sand-carrying rate of the proppant. When the pumping pressure approaches the preset limit pressure, pump the proppant at a gradually decreasing rate in steps. Step 6: When the sand removal pressure is reached, the filling service string is immediately stopped, and the completion fluid is injected in reverse circulation to clean the filling service string. Step 7: The filling service string is pulled out, and the center flow control completion string is run in.

[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 range of the sand ratio is 0.2-0.5 PPG.

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

[0018] Furthermore, the infinite segmented sand control and water control well completion process also includes step eight: after the well completion operation is completed, install the wellhead equipment and wait for the shape memory packer to deform before starting production.

[0019] Compared with the prior art, the infinite segmented sand control and water control well 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 that of the completion string, making it suitable for segmented packing in special cases such as large well inclination, large dogleg, and complex well trajectory. It is easy to run and has no quantity limit. When used with water-blocking proppant, it can achieve an integrated effect of unlimited segmented sand control and water control.

[0021] 2) The infinite segmented sand control and water control well completion process proposed in this invention has no bypass channels or other diameter reductions compared with the existing segmented packer filling technology. The filling process is safer and can use a higher filling displacement, which significantly improves the operation efficiency.

[0022] 3) The infinite segmented sand control and water control well completion process proposed in this invention can achieve the sand control effect of gravel filling, and at the same time has the function of adjusting the water control strategy in the mid-to-late stage, which is suitable for the sand control and water control needs of the entire life cycle of oil wells.

[0023] 4) The packer packing method is simple, requiring no setting tools or injection of high-pressure liquid, making the operation safer and more efficient;

[0024] 5) The infinite segmented sand control and water control well completion process proposed in this invention, in addition to establishing isolation between annular sections or layers, also uses water-blocking proppant to achieve axial water blocking within sections and layers, thus achieving an integrated effect of infinite segmented sand control and water control. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the tubing string for the infinite segmented sand control and water control well completion process according to an embodiment of the present invention;

[0026] Figure 2 For use in the lower part Figure 1 A schematic diagram of the central flow control completion string within the infinite segmented sand control and water control completion process string shown;

[0027] Figure 3 This is a schematic diagram of the structure of the infinite segmented sand control and water control well completion process string after well completion according to an embodiment of the present invention, which shows the shape of the shape memory packer after well completion. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

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

[0030] The infinite segmented sand control and water control completion process string 100 of this invention uses a shape memory packer 104 instead of the existing mechanical segmented packer and segmented filling packer. The outer diameter of the shape memory packer 104 can be comparable to the size of the completion string, making it suitable for segmented sealing in special cases such as large well inclination, large dogleg, and complex well trajectory. It is simple to run in and has no quantity limit. At the same time, the sealing method of the shape memory packer 104 is simple. It can be set down in the well by relying on the ambient temperature downhole, without the need to run setting tools or inject high-pressure fluid. The operation is safer and more efficient. The shape memory packer 104 can achieve more reliable and convenient isolation between the completion string and the annulus of the formation or casing. The produced fluid of each section or layer of the production well cannot flow to other production sections or production layers through the packer. In addition, the infinite segmented sand control and water control completion process string 100 of this embodiment of the invention also fills the production section established between adjacent shape memory packers 104 with water-blocking proppant 107. This makes the flow resistance of the aqueous phase fluid in the formation production fluid increase when it flows axially in the annulus 108, inhibiting its crossflow within the section / layer. This causes the aqueous phase fluid to flow only into the water control screen 103 in the radial direction, achieving approximately fine segmentation within each section / layer, and achieving the purpose of infinite segmented sand control and water control.

[0031] In such Figure 2 In the preferred embodiment shown, the water control screen 103 is replaced with a sand control screen. The infinite segmented sand control and water control completion process string 100 may also include a central flow control completion string 200 inserted therein. The central flow control completion string 200 may include a production packer assembly 201, multiple flow control assemblies 210, and a plug 205 connected sequentially from top to bottom through the production tubing 202. The flow control assembly 210 may include a flow control component 203 and an insertion seal 204 connected through the production tubing 202. The flow control component 203 may be a sliding sleeve or a flow control short section. A water control valve is installed on the flow control short section. The insertion 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 a water control screen 103, since the sand control screen lacks fluid regulation capabilities, a central flow control completion string 200 needs to be installed inside the sand control completion string to enhance radial control of the produced fluid. The sliding sleeve in this central flow control completion string 200 can adjust its opening, and the flow control sub-section can be equipped with flow control devices, such as ICD, AICD, C-AICD, and other types of water control valves, to establish segmented / layered control within the infinitely segmented sand control and water control completion process string 100. Radial flow control is achieved using the sliding sleeve or flow control sub-section. When using... Figure 1When the water control screen pipe 103 is shown, there is no need to run the central flow control completion pipe 200 in the infinite segmented sand control and water control completion process pipe string 100, or the run-in central flow control completion pipe string 200 does not need to be equipped with flow control components 203. The purpose of radial flow restriction can be achieved by relying solely on the water control valve 106 on the water control screen pipe 103.

[0033] According to the present invention, the water-blocking proppant 107 can be a polymer proppant, and the density range of the water-blocking proppant 107 is preferably 0.6-1.2 g / cm3. The density of the water-blocking proppant 107 is comparable to that of brine or seawater, and it can exist in a suspended state in the liquid. 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 a preferred embodiment of the present invention, the shape memory packer 104 may include a packer base and a shape memory sleeve fitted on the packer base. The shape memory sleeve is made of 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 time to expose the shape memory sleeve. The shape memory sleeve expands under downhole temperature conditions to seal the annulus 108 between the shape memory packer 104 and the wellbore 120.

[0035] In this embodiment, the shape memory sleeve of the shape memory packer 104 is made of shape memory polymer material. Under normal temperature conditions, the shape memory polymer material is pressed into a sleeve-shaped structure and connected to the packer substrate. The shape memory sleeve can be installed on the packer substrate as a whole or in segments, depending on the needs and manufacturing process. A soluble protective sleeve is installed outside the shape memory sleeve. The dissolution time of the protective sleeve can be changed according to the single-well operation time and completion requirements, thereby controlling the deformation time of the shape memory sleeve. The outer diameter of the shape memory sleeve can be customized, meaning the compression ratio and deformation rate of the polymer material can be changed to ensure it always matches the outer diameter of the infinitely segmented sand control and water control completion process string 100. This avoids problems such as increased difficulty in running the string due to diameter expansion and increases the number of segments. Simultaneously, since the shape memory packer 104 has no radial fluid flow channels, the annulus 108 outside the shape memory packer 104 will be filled with slurry after the filling operation. After well completion, when the shape memory sleeve deforms due to heat downhole, it encapsulates the water-blocking proppant 107 in the annulus 108 into the expanding material, achieving sand sealing. The deformation temperature range is preferably 50-80℃, and the deformation time is preferably 48-60h. The amount of foaming agent in the time-delay shape memory sleeve can be adjusted according to the bottom hole temperature to extend or shorten the deformation time.

[0036] Preferably, the shape memory polymer material contains polyurethane-based activated powder. When released, the polyurethane-based activated powder in the shape memory polymer material can contact hot water to form an adhesive, filling the pores of the water-blocking support 107 to form a non-permeable binder, thereby enhancing the sealing effect.

[0037] Preferably, the length of a single shape memory packer 104 is 10-15m. More preferably, it is 12m, to avoid the problem of a dense gravel layer forming on the outside of the shape memory packer 104 due to high sand removal pressure, which would affect the packing effect.

[0038] According to the infinite segmented sand control and water control completion process method of the present invention, the use of the above-mentioned infinite segmented sand control and water control completion process string 100 may include the following steps: Step 1: Determine the number and location of segments based on the well logging interpretation results of reservoir permeability and fluid saturation; Step 2: Determine the orifice diameter and quantity distribution of water control valves 106 based on production system prediction or near-well production data, and install the water control valves 106 on the water control screen pipe 103 or the flow control short section; Step 3: Run the infinite segmented sand control and water control completion process string 100 and the filling service string to the design position, so that the top packer 101 is set, verified, and released; Step 4: Perform a positive circulation test using completion fluid and calculate the downhole leakage rate; Step 5: Use the filling service string to flow the infinite segmented sand control and water control completion process... The annulus 108 between the tubing string 100 and the wellbore 120 is filled with water-blocking proppant 107 with a preset sand ratio. The injection rate and the sand-carrying speed of the water-blocking proppant 107 are gradually increased. When the pumping pressure approaches the preset limit pressure, the pumping rate is gradually reduced in steps to ensure that the pumping pressure is always lower than the limit pressure during the entire filling process, while pumping the sand-carrying fluid at the maximum rate. Step 6: When the sand-removal pressure is reached, the filling service tubing is immediately stopped, and the completion fluid is injected in reverse circulation to clean the filling service tubing. The reverse circulation process can inject the completion fluid at a rate of 2 bbl / min until there is no water-blocking proppant 107 in the liquid returning from the wellhead, and then the pump is stopped. Step 7: The filling service tubing is pulled out, and the center-controlled flow completion tubing 200 is run in.

[0039] The infinite segmented sand and water control well completion process of this invention employs a shape memory packer 104 instead of the existing mechanical segmented packers and segmented filling packers. This isolates the annulus between the completion string and the formation or casing, preventing produced fluids from flowing through the packers to other production sections or layers. Simultaneously, water-blocking proppant 107 is filled into the production section established between adjacent shape memory packers 104. Its hydrophobic properties increase the axial flow of aqueous fluids within the annulus, achieving near-fine segmentation within each section / layer, thus achieving infinite segmented sand and water control. During the running of the infinite segmented sand and water control well completion string 100 and the filling of the water-blocking proppant 107, the shape memory packer 104 does not expand. When the shape memory packer 104 expands after filling, the shape memory material can embed the proppant within the annulus 108 into the material without affecting the sealing effect. Compared with existing segmented packer filling technology, the infinite segmented sand control and water control well completion process of this invention has no bypass channels or other diameter reductions, making the filling process safer and allowing for higher filling discharge rates, thus significantly improving operational 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 range of the sand ratio is 0.2-0.5PPG.

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

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

[0043] The following is a specific embodiment of the infinite segmented sand control and water control well completion process according to the present invention. The offshore B7H well is a horizontal well with a loose sandstone bottom-water reservoir as its production layer. The horizontal production section is 675m long, with a maximum inclination of 90° and a maximum dogleg of 6.38° / 30m. The initial daily production rate of the B7H well is designed to be 300 m³ / d, and the maximum daily production rate in the medium term is 1500 m³ / d. According to the logging interpretation results, the reservoir permeability in the middle of the B7H well is high, and it is close to the bottom water, therefore, precise water control is required in the middle section. Furthermore, the entire horizontal section is highly heterogeneous; to improve the water control effect, the production section is divided into 6 segments for water control, and the water-flooded section will be sealed after the middle section is flooded in the later stage. To improve water control, ICD water control valves are used. Based on the reservoir properties, the orifice distribution of the water control valves on each production section is designed from bottom to top as follows: 7 valves with a diameter of 5mm, 9 valves with a diameter of 4mm, 11 valves with a diameter of 2.5mm, 9 valves with a diameter of 3mm, 8 valves with a diameter of 4mm, and 7 valves with a diameter of 5mm. One ICD water control valve is installed on each water control screen pipe.

[0044] Due to the large dogleg shape and numerous segments in this well, conventional segmented packer installation was difficult and prone to buckling during analysis. Therefore, based on the requirements for sand control in loose sandstone and precise segmented water control, the infinite segmented sand control and water control completion process string and method implemented in this invention were adopted. The bottomhole temperature of well B7H is 60℃, and the completion operation time is approximately 72 hours. Therefore, the shape memory sleeve expansion time was designed to be 80 hours to ensure that the shape memory packer 104 only begins to expand after the filling operation is completed.

[0045] After the well is cleaned and the tubing is scraped, a 100-meter unlimited segmented sand control and water control completion string is installed. From bottom to top, it includes a 3-meter 5-1 / 2-inch float shoe assembly, a 90-meter 5-1 / 2" water control screen, a 12-meter #1 shape memory packer, a 107-meter 5-1 / 2" water control screen, a 12-meter #2 shape memory packer, a 130-meter 5-1 / 2" water control screen, a 12-meter #3 shape memory packer, a 114-meter 5-1 / 2" water control screen, a 12-meter #4 shape memory packer, a 98-meter 5-1 / 2" water control screen, a 12-meter #5 shape memory packer, an 88-meter 5-1 / 2" water control screen, a 3-meter 5-1 / 2" blind tube sub, and a 12-meter 9-5 / 8" top packer assembly.

[0046] After the infinite segmented sand control 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 packing operation begins. Filtered seawater is used as the completion fluid. After circulation testing, the pumping rate is gradually increased at 2 BPM, 4 BPM, 6 BPM, and 8 BPM, while maintaining a sand ratio of 0.2 PPG during sand packing. Based on packing friction, net fluid column pressure, and formation fracturing pressure, the designed safe pressure during packing is 10.34 MPa. Water-blocking proppant 107 has a low density and good suspension in the completion fluid during packing. Its accumulation pattern is from the toe to the heel. As the amount of returnable water control screens gradually decreases, the packing pressure gradually increases at a certain packing rate. Therefore, during packing, when the pressure approaches the safe pressure, the pumping rate is gradually reduced in 1 BPM increments until the sand removal pressure is reached. Raise the service tool to the reverse circulation process and inject completion fluid at a rate of 2 BPM until the returned fluid no longer contains water-blocking proppant 107. Stop reverse circulation and retrieve the service string. Install and run the center flow control completion string 200, and set the production packer 201 after it is in place. Pull out the drill string and proceed to the top completion operation, awaiting production.

[0047] The B7H well has a sinking trajectory in the middle section, which is close to the bottom water and has high permeability, posing a significant risk of water flooding. By using a 200mm central flow control completion string and installing an intelligent control sliding sleeve, this section can be shut off after the middle section is flooded, thus reducing the water cut 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, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within 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 the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A segmented well completion process tubing string for sand control and water control, characterized in that, include: The well consists of a sand-control top packer assembly, multiple segmented screen pipe assemblies, and a float shoe assembly, connected sequentially from top to bottom via blind pipes. Each segmented screen pipe assembly includes a shape memory packer connected via blind pipes and a water control screen pipe equipped with a water control valve. The annulus between the infinite segmented sand-control and water control completion string and the wellbore is filled with a water-blocking proppant. This proppant is a high-molecular-weight polymer proppant with a density ranging from 0.6 to 1.2 g / cm³. The shape memory packer includes a packer substrate and a shape memory sleeve fitted onto the substrate. The shape memory sleeve is made of a shape memory polymer material containing polyurethane-based activated powder. Upon release, this activated powder can contact hot water to form an adhesive, which fills the pores of the water-blocking proppant, forming a non-permeable binder. The length of a single shape memory packer ranges from 10 to 15 m.

2. The infinitely segmented sand control and water control well completion process string according to claim 1, characterized in that, The water control screen is replaced with a sand control screen. The infinite segmented sand control and water control completion process string also includes a central flow control completion string inserted inside it. The central flow control completion string includes a production packer assembly, multiple flow control assemblies, and a plug connected sequentially from top to bottom through the production tubing. The flow control assembly includes a flow control component and an insertion seal connected through the production tubing. The flow control component is a sliding sleeve or a flow control short section. A water control valve is installed on the flow control short section. The insertion seal is sealed and fitted in the shape memory packer.

3. The infinitely segmented sand control and water control well completion process string according to claim 2, characterized in that, The outer surface of the shape memory sleeve is provided with a soluble protective sleeve, which is constructed to dissolve after a specific time to expose the shape memory sleeve. The shape memory sleeve expands under downhole temperature conditions to seal the annulus between the shape memory packer and the well wall.

4. A method for an infinitely segmented sand control and water control well completion process, employing the infinitely segmented sand control and water control well completion process string according to claim 3, characterized in that, Includes the following steps: Step 1: Determine the number and location of segments based on the well logging interpretation results of reservoir permeability and fluid saturation; Step 2: Based on the production system forecast or the production data of the well, determine the orifice diameter and quantity distribution of the water control valve, and install the water control valve on the water control screen pipe or the flow control short section; Step 3: Lower the infinitely segmented sand control and water control completion process tubing and filling service tubing to the designed position, so that the top packer is set, verified, and released; Step 4: Perform a positive circulation test using completion fluid and calculate the downhole loss rate; Step 5: Using the filling service string, fill the annulus between the infinite segment sand control and water control completion process string and the well wall with the water-blocking proppant having a preset sand ratio, gradually increase the injection rate and the sand-feeding speed of the water-blocking proppant, and when the pumping pressure approaches the preset limit pressure, pump the proppant with a gradually decreasing pumping rate in steps. Step Six: Once the desanding pressure is reached, the filling service string immediately stops working, and the completion fluid is injected in reverse circulation to clean the filling service string; Step 7: Remove the filling service string and run in the center flow control completion string.

5. The infinite segmented sand control and water control well completion process according to claim 4, characterized in that, 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 range of the sand ratio is 0.2-0.5 PPG.

6. The infinite segmented sand control and water control well completion process according to claim 5, characterized in that, In step five, the sand ratio is 0.2 PPG. When the pumping pressure approaches the preset limit pressure, the pumping flow rate is gradually reduced in increments of 1 bbl / min.

7. The infinite segmented sand control and water control well completion process according to claim 4, characterized in that, It also includes step eight: after the well completion operation is completed, install the wellhead equipment and wait for the shape memory packer to deform before starting production.

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