Large-volume tank-mounted suspended sectional intelligent oil stabilization and water control real-time measurement and adjustment well completion method

Abstract

The application discloses a large-liquid-volume tank-hanging type segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method, which comprises the following steps: step 1, according to the reservoir characteristics, the well section to be developed is divided into several different cabins; step 2, according to the division of the cabin, a segmented intelligent water control outer pipe column is lowered, and a first water control flow resistance barrier is established by using a water control mechanism; step 3, according to the accurate position of the segmented intelligent water control outer pipe column, a segmented intelligent water control inner pipe column is lowered, an intelligent production allocator is automatically adjusted according to monitored data, and a second water control flow resistance barrier is established; and step 4, a tank-hanging production pipe column is connected to the segmented intelligent water control inner pipe column, the overall suspension, tensile and liquid production capacity of the inner pipe column are improved, and the large-liquid-volume production demand is met. The method can realize profile control and water control of the reservoir, can realize separate production and combined production of different layers, greatly enhances the flexibility and convenience of production, and reduces the workover cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil exploration and development completion, in particular to a large-liquid-volume canned suspension type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method. BACKGROUND

[0002] In the process of oil exploration and development, due to unstable production pressure difference and recovery degree, the pressure drop around the wellbore causes the oil-water interface to deform into a cone shape, which leads to edge water or bottom water channeling and suppresses oil production.

[0003] To solve this production problem, the method of lowering a traditional mechanical type external segmented water control string is usually used to try to solve the problem. This method can delay the edge water or bottom water coning to a certain extent and prolong the life of the oil well. However, when the water cone breaks through, it is not possible to further control the production profile, implement real-time liquid volume and pressure control of different production layers with large physical property differences, and selectively shut down a certain production layer from the ground. Only well repair operations can be relied on. In particular, in the eastern sea area, the intelligent segmented flow control technology of a three-thousand-cubic-meter large-liquid-volume oil field is in urgent need. The technical field urgently needs a composite water control method that can adjust the production profile through an external water control string and further adjust the production profile through an internal water control string, solve the problem of three-thousand-cubic-meter large-liquid-volume production demand and string suspension load safety, and flexibly adjust the production state of different production layers from the ground. SUMMARY

[0004] To solve one of the technical problems in the prior art, the present application provides a large-liquid-volume canned suspension type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method.

[0005] The large-liquid-volume canned suspension type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to some embodiments of the present application comprises the following steps:

[0006] Step 1: According to the characteristics of the oil reservoir, the well section to be developed is divided into several different compartments, and an electrically controlled intelligent production allocator is set by calculation;

[0007] Step 2: According to the division of the compartments, a segmented intelligent water control outer string is lowered, a mechanical physical separator is used to divide the well section externally, and a water control mechanism is used to establish a first water control flow resistance barrier;

[0008] Step 3: According to the accurate position of the segmented intelligent water control outer string, a segmented intelligent water control inner string is lowered, an insertion seal is used for internal segmentation, an intelligent production allocator is installed in each compartment to monitor data in real time, the intelligent production allocator is automatically adjusted according to the monitored data, and a second water control flow resistance barrier is established;

[0009] Step 4: connecting the canning hanging production pipe column to the segmented intelligent water control inner pipe column to improve the overall hanging, tensile and liquid production capacity of the inner pipe column, and meet the large liquid production demand.

[0010] In some embodiments of the present application, the step 1 is to set the development well section as several external compartments according to the permeability, shale content, allocation data and well trajectory data of the reservoir, and in combination with the simulation results.

[0011] In some embodiments of the present application, the segmented intelligent water control outer pipe column in the step 2 comprises a top packer, a blind pipe, a water control mechanism, a mechanical physical separator and a round plug connected in sequence.

[0012] In some embodiments of the present application, the water control mechanism comprises one or more of a water control screen pipe and a water control sub, and the first water control flow resistance barrier established by the water control mechanism can adjust the oil-water flow profile of the reservoir.

[0013] In some embodiments of the present application, the mechanical physical separator comprises at least one of an inflatable packer or a mechanical isolation packer.

[0014] In some embodiments of the present application, in the above step 3, the segmented intelligent water control inner pipe column comprises a surface control device, a tubing hanger, a safety valve, a sliding sleeve, a through-cable production packer, a working barrel, a canned electric submersible pump unit, a positioning bypass, an insertion seal, an intelligent allocation device and a round plug; the second water control flow resistance barrier established by the segmented intelligent water control inner pipe column can indirectly adjust the oil-water flow profile of the reservoir and realize separate production and commingled production of different layers.

[0015] In some embodiments of the present application, the intelligent allocation device comprises one or more of a hydraulic control allocation device, an electric control allocation device or a wellbore pressure control allocation device.

[0016] In some embodiments of the present application, the data monitored by the intelligent allocation device includes flow rate, temperature, pressure and choke opening.

[0017] The beneficial effects of the present application are: compared with the prior art, the large-liquid-volume tank-mounted hanging type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion well method has the following advantages: the method of the present application realizes profile control and water control of the oil reservoir through the segmented intelligent water control outer pipe column and the segmented intelligent water control inner pipe column, and can realize separate production and combined production of different layers, greatly enhancing the flexibility and convenience of production and reducing the workover cost; at the same time, the segmented intelligent water control inner pipe column in the present application is connected with an intelligent production allocator, which can realize the monitoring of downhole flow, temperature, pressure, choke opening and other data, providing the most intuitive data for oil well production, thereby assisting production decision-making; in summary, the method of the present application realizes the intelligent segmented flow regulation and water control of three thousand cubic meters of large-liquid-volume offshore, combines the use of the outer water control pipe column and the inner water control pipe column, establishes two water control flow resistance barriers, and significantly enhances the effect of oil stabilization and water control.

[0018] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application, the present application will be further described below in combination with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0020] Figure 1 is a schematic diagram of the large-liquid-volume tank-mounted hanging type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion well method provided by the present application. DETAILED DESCRIPTION

[0021] The present application will be further described in detail below in combination with the drawings and embodiments. Similar elements in different embodiments use associated similar element reference numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the present application are not shown or described in the specification in order to avoid the core part of the present application being overwhelmed by too much description, and it is not necessary for those skilled in the art to understand the related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0022] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0023] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0024] The following is in conjunction with the appendix Figure 1 The provided embodiments further illustrate the large-volume tank-type suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method proposed in this application.

[0025] like Figure 1 As shown, this application provides a large-volume, suspended, segmented intelligent well completion method for stabilizing oil and controlling water in real time, including the following steps:

[0026] Step 1: Based on the reservoir characteristics, the well section to be developed is divided into several different compartments, and the combination of hydraulic-electric hybrid or pure electric intelligent production equipment is set by calculation.

[0027] Step 2: According to the division of the compartments, the segmented intelligent water control external tubing is lowered, the well section is divided into external segments using mechanical physical separators, and the first water control flow resistance barrier is established using the water control mechanism.

[0028] Step 3: Based on the precise position of the segmented intelligent water control outer tubing, the segmented intelligent water control inner tubing is lowered, and the internal segmentation is performed using an insertion seal. An intelligent production device is installed in each compartment to monitor the data in real time. The intelligent production device is automatically adjusted based on the monitored data to establish a second water flow resistance barrier.

[0029] Step 4: Connect the canning suspension production column to the segmented intelligent water control inner column to improve the overall suspension, tensile strength and liquid production capacity of the inner column, so as to meet the needs of large-volume liquid production.

[0030] In some embodiments of this application, in step 1, the development well section is set up as several external compartments based on a comprehensive analysis of the reservoir's permeability, clay content, production data, and well trajectory data, combined with simulation results.

[0031] In some embodiments of this application, the segmented intelligent water control outer pipe column in step 2 includes a top packer, a blind pipe, a water control mechanism, a mechanical physical separator, and a round plug connected in sequence.

[0032] In some embodiments of the present application, the water control mechanism includes one or more of a water control screen pipe, a water control short section, and the first water control flow resistance barrier established by the water control mechanism can adjust the oil-water flow profile of the reservoir.

[0033] In some embodiments of the present application, the mechanical physical separator includes one or more of an inflatable packer, a mechanical isolation packer, and a chemical packer.

[0034] In some embodiments of the present application, in the above step 3, the segmented intelligent water control inner string includes a surface control device, a tubing hanger, a safety valve, a sliding sleeve, a cable production packer, a working barrel, a canned electric submersible pump unit, a positioning bypass, an insertion seal, an intelligent proppant, and a round plug; the second water control flow resistance barrier established by the segmented intelligent water control inner string can indirectly adjust the oil-water flow profile of the reservoir and realize separate production and combined production of different layers.

[0035] In some embodiments of the present application, the intelligent proppant includes one or more of a hydraulic proppant, an electric proppant, or a wellbore pressure control proppant.

[0036] In some embodiments of the present application, the data monitored by the intelligent proppant includes flow rate, temperature, pressure, and choke opening.

[0037] The following describes the large liquid volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method of the present application with embodiments.

[0038] Embodiment 1

[0039] The quality of the remaining underground potential in a certain offshore oilfield is relatively poor, the crude oil viscosity is high, and the oil column height is extremely low; the production string needs to meet a high maximum liquid volume to realize oil carrying by liquid in the high and ultra-high water cut period. For the 2600m3 liquid volume requirement of this well, the canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method is implemented according to the following steps:

[0040] Step 1, according to the reservoir characteristics, the well section is divided into five external compartments;

[0041] Step 2, lower the segmented intelligent water control outer string, which includes one top packer and four inflatable packers;

[0042] Step 3, lower the segmented intelligent water control inner string, which has three insertion seals, two electric proppants, and one hydraulic sliding sleeve proppant;

[0043] Step 4, install a set of canned electric submersible pump unit, upgrade the overall liquid production capacity of the segmented intelligent water control string, and adapt to the large liquid volume requirement of the oilfield.

[0044] Implementation effect: After starting to control, the second section and the third section of the production layer are fully opened, the first section of the production layer at the root end is closed, the water content of the wellhead test decreases from 89.7% to 79.7%, the water content decreases by 10%, the daily oil production increases by 93.49 cubic meters, and the water control and oil increase effect is significant. After using for a period of time, the water content is 82.9%, and the daily oil production is 140.4 cubic meters, and the effect is stable.

[0045] Example 2

[0046] The maximum liquid volume of the new and old boreholes of the well is 1590m 3 / d, the new borehole is developed in two layers, and the following steps are implemented to implement the tank-mounted pump type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method:

[0047] Step 1, according to the characteristics of the oil reservoir, the well section is divided into two external compartments;

[0048] Step 2, lower the segmented intelligent water control outer pipe string, which includes a top packer and a mechanical isolation packer;

[0049] Step 3, lower the segmented intelligent water control inner pipe string, which has an insertion seal, two liquid control sliding sleeves and a liquid control sliding sleeve for production of the old borehole;

[0050] Step 4, install a set of tank-mounted electric submersible pump unit to meet the production demand of 3000 cubic meters of large liquid volume.

[0051] Implementation effect: At present, only the lowermost test section of the main branch is produced, and the water content is reduced by 53% compared with the production data, and the oil production is increased by more than one time.

[0052] Compared with the prior art, the large-liquid-volume tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method has the following advantages: the method of the application realizes profile control and water control of the oil reservoir through the segmented intelligent water control outer pipe string and the segmented intelligent water control inner pipe string, and can realize separate production and combined production of different layers, greatly enhancing the flexibility and convenience of production and reducing the workover cost; at the same time, the segmented intelligent water control inner pipe string in the application is connected with the intelligent production allocator, which can realize the implementation of monitoring of downhole flow, temperature, pressure, choke opening and other data, providing the most intuitive data for oil well production, thereby assisting production decision-making; in summary, the method proposed in the application realizes intelligent segmented flow control of three thousand cubic meters of large liquid volume on the sea, combines the use of the outer water control pipe string and the inner water control pipe string, establishes two water control flow resistance barriers, and significantly enhances the oil stabilization and water control effect.

[0053] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A large liquid volume tank-mounted suspended sectional intelligent oil stabilization and water control real-time measurement and adjustment completion well method, characterized in that, The method comprises the following steps: Step 1: According to the permeability, shale content, allocation data and borehole trajectory data of the oil reservoir, the well section to be developed is divided into several different compartments by comprehensive analysis combined with simulation results, and the combination of the electrically controlled intelligent allocation device is set by calculation; Step 2: According to the compartment division, the segmented intelligent water control outer string is run in, the well section is segmented externally by using the mechanical physical separator, and the first water control flow resistance barrier is established by using the water control mechanism; Step 3: According to the accurate position of the segmented intelligent water control outer string, the segmented intelligent water control inner string is run in, the segmented intelligent water control inner string comprises a ground control device, a tubing hanger, a safety valve, a sliding sleeve, a through-cable production packer, a working barrel, a canned electric submersible pump unit, a positioning bypass, an insertion seal, an intelligent allocation device and a round plug, the inner section is segmented by using the insertion seal, the intelligent allocation device is installed in each compartment to monitor the data in real time, the intelligent allocation device is automatically adjusted according to the monitored data, the second water control flow resistance barrier is established, the second water control flow resistance barrier established by the segmented intelligent water control inner string can indirectly adjust the oil-water flow profile of the oil reservoir, and separate production and combined production of different layers are realized; Step 4: The canned suspension production string is connected on the segmented intelligent water control inner string, the overall suspension, tensile and liquid production capacity of the inner string are improved, and the demand for large liquid production is met.

2. The method according to claim 1, wherein the method is characterized in that, The segmented intelligent water control outer string in step 2 comprises a top packer, a blind pipe, a water control mechanism, a mechanical physical separator and a round plug connected in sequence.

3. The large volume tanked hanging sectionalized intelligent stabilizing oil and water control real-time measuring and adjusting completion method of claim 2, wherein, The water control mechanism comprises one or more of a water control screen pipe and a water control sub, and the first water control flow resistance barrier established by the water control mechanism can adjust the oil-water flow profile of the oil reservoir.

4. The large volume tanked hanging sectionalized intelligent stabilizing oil and water control real-time measuring and adjusting completion method of claim 2, wherein, The mechanical physical separator comprises at least one of an inflatable packer or a mechanical isolation packer.

5. The large volume tanked hanging sectionalized intelligent stabilizing oil and water control real-time measuring and adjusting completion method of claim 1, wherein, The intelligent allocation device comprises one or more of a hydraulic allocation device, an electrically controlled allocation device or a wellbore pressure control allocation device.

6. The large volume tanked hanging sectionalized intelligent stabilizing oil and water control real-time measuring and adjusting completion method of claim 1 or 5, characterized in that, The data monitored by the intelligent allocation device comprises flow rate, temperature, pressure and choke opening.

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