Large-liquid-volume canning suspension type segmented intelligent oil stabilizing and water controlling real-time measuring and adjusting well completion method

Abstract

The invention discloses a large-liquid-volume canned suspension type segmented intelligent oil stabilizing and water controlling real-time measuring and adjusting well completion method which comprises the following steps that 1, according to oil reservoir characteristics, a well section needing to be developed is divided into a plurality of different cabins; 2, according to division of a cabin, a segmented intelligent water control outer pipe column is put down, and a first water control flow resistance barrier is built through a water control mechanism; 3, according to the accurate position of the segmented intelligent water control outer pipe column, a segmented intelligent water control inner pipe column is put down, the intelligent bottom-hole regulator is automatically adjusted according to monitored data, and a second water control flow resistance barrier is established; and 4, a canned suspension 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 is improved, and the large-liquid-volume production requirement is met. According to the method, profile control and water control of the oil reservoir are achieved, separate production and commingling production of different layers can be achieved, the production flexibility and convenience are greatly improved, and the well repair cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of well completion for petroleum exploration and development, and in particular to a large-volume liquid tanked suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method. Background Art

[0002] During the process of oil exploration and development, due to the production pressure difference and unstable recovery rate of edge and bottom water reservoirs, the pressure drop around the wellbore causes the oil-water interface to deform into a cone, resulting in edge water or bottom water breakthrough, which suppresses oil production.

[0003] In response to this production problem, the traditional mechanical external segmented water control string is usually used to try to solve it. This method can delay the cone of edge and bottom water to a certain extent and extend the life of the oil well. However, after the water cone breaks through, it is impossible to further control the production profile, and it is impossible to implement the key parameter indicators such as real-time liquid volume and pressure of the production layers with large physical property differences. It is also impossible to selectively close a production layer from the ground, and it can only rely on well repair operations. Especially in the eastern sea area, there is an urgent need for intelligent segmented flow control and water control technology for 3,000 cubic meters of large liquid oil fields. This 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 production demand of 3,000 cubic meters of large liquid and the safety of the string suspension load, and can flexibly adjust the production status of different production layers from the ground. Summary of the invention

[0004] In order to solve one of the technical problems existing in the prior art, the present application provides a large-liquid tank-mounted suspended segmented intelligent oil and water stabilization and real-time measurement and adjustment completion method.

[0005] According to some embodiments of the present application, a large-volume tanked suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method is provided, which includes the following steps:

[0006] Step 1: Divide the well section to be developed into several different compartments according to reservoir characteristics, and set the combination of liquid-electric hybrid or pure electric-controlled intelligent production distributors through calculation;

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

[0008] Step 3: According to the precise position of the segmented intelligent water control outer pipe string, the segmented intelligent water control inner pipe string is lowered, and the internal segmentation is performed using an insert seal. An intelligent production distributor is installed in each cabin to monitor the data in real time, and the intelligent production distributor is automatically adjusted according to the monitored data to establish a second water control flow resistance barrier;

[0009] Step 4: Connect the canned suspension production string to the segmented intelligent water control inner string to improve the overall suspension, tension resistance and liquid production capabilities of the inner string to meet the needs of large liquid production.

[0010] In some embodiments of the present application, in step 1, a comprehensive analysis is performed based on the permeability, mud content, production allocation data, and wellbore trajectory data of the reservoir and combined with simulation results to set the development well section as several external compartments.

[0011] In some embodiments of the present application, the segmented intelligent water control outer pipe string 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.

[0012] In some embodiments of the present application, the water control mechanism includes one or more of a water control screen and a water control short joint, 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 includes one or more of a swellable packer, a mechanical isolation packer, and a chemical packer.

[0014] In some embodiments of the present application, in the above step 3, the segmented intelligent water-control inner tubing string includes ground control equipment, a tubing hanger, a safety valve, a sliding sleeve, a cable production packer, a working barrel, a canned submersible pump unit, a positioning bypass, an insert seal, an intelligent production distributor and a round plug; the second water-control flow resistance barrier established by the segmented intelligent water-control inner tubing string can indirectly adjust the oil-water flow profile of the reservoir and realize the separate production and combined production of different strata.

[0015] In some embodiments of the present application, the intelligent production distributor includes one or more of a hydraulically controlled production distributor, an electrically controlled production distributor, or a wellbore pressure controlled production distributor.

[0016] In some embodiments of the present application, the data monitored by the intelligent dispenser include flow rate, temperature, pressure and nozzle opening.

[0017] The beneficial effects of the present application are: compared with the prior art, the large-liquid tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method of the present application has the following advantages: the method of the present application realizes the profile adjustment 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 also realize the separate production and combined production of different layers, which greatly enhances the flexibility and convenience of production and reduces the cost of well repair; at the same time, the segmented intelligent water control inner pipe string in the present application is connected with an intelligent production distributor, which can realize the monitoring of downhole flow, temperature, pressure, nozzle opening and other data, and provide the most intuitive data for oil well production, thereby assisting production decision-making; in summary, the method proposed in the present application realizes the intelligent segmented flow control and water control of 3,000 cubic meters of large liquid volume at sea, combines the external water control pipe string with the internal water control pipe string, establishes two water control flow resistance barriers, and significantly enhances the effect of stabilizing oil and controlling water.

[0018] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present application, the present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a schematic diagram of a large-liquid tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method provided in this application. DETAILED DESCRIPTION

[0021] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and 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 for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0022] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0023] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0024] The following is combined with Figure 1 The provided embodiments further illustrate the large-liquid tank-mounted suspended segmented intelligent oil and water stabilization and real-time measurement and adjustment completion method proposed in the present application.

[0025] like Figure 1 As shown, the present application provides a large-volume tanked hanging segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method, including the following steps:

[0026] Step 1: Divide the well section to be developed into several different compartments according to reservoir characteristics, and set the combination of liquid-electric hybrid or pure electric-controlled intelligent production distributors through calculation;

[0027] Step 2: according to the division of the compartments, the segmented intelligent water control outer pipe string is lowered, the well section is segmented externally using a mechanical physical separator, and the first water control flow resistance barrier is established using a water control mechanism;

[0028] Step 3: According to the precise position of the segmented intelligent water control outer pipe string, the segmented intelligent water control inner pipe string is lowered, and the internal segmentation is performed using an insert seal. An intelligent production distributor is installed in each cabin to monitor the data in real time, and the intelligent production distributor is automatically adjusted according to the monitored data to establish a second water control flow resistance barrier;

[0029] Step 4: Connect the canned suspension production string to the segmented intelligent water control inner string to improve the overall suspension, tension resistance and liquid production capabilities of the inner string to meet the needs of large liquid production.

[0030] In some embodiments of the present application, in step 1, a comprehensive analysis is performed based on the permeability, mud content, production allocation data, and wellbore trajectory data of the reservoir and combined with the simulation results to set the development well section as several external chambers.

[0031] In some embodiments of the present application, the segmented intelligent water control outer string 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 and a water control short joint, 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 a swellable 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 ground control equipment, 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 insert seal, an intelligent production distributor 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 the separate production and combined production of different layers.

[0035] In some embodiments of the present application, the intelligent production distributor includes one or more of a hydraulically controlled production distributor, an electrically controlled production distributor, or a wellbore pressure controlled production distributor.

[0036] In some embodiments of the present application, the data monitored by the intelligent dispenser include flow rate, temperature, pressure and nozzle opening.

[0037] The following is an example of a large-liquid tank-mounted suspended segmented intelligent oil and water stabilization and real-time measurement and adjustment well completion method of the present application.

[0038] Example 1

[0039] The quality of the remaining underground potential of an offshore oil field is relatively poor, the crude oil viscosity is high, and the oil column height is extremely low; the production string needs to meet a higher maximum liquid volume to achieve liquid-to-oil in the high-to-ultra-high water content period. In view of the 2600m3 liquid volume requirement of this well, the canned hanging segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method is implemented according to the following steps:

[0040] Step 1: Divide the well section into five external compartments according to reservoir characteristics;

[0041] Step 2: Run a segmented intelligent water control outer string, which includes a top packer and four expansion packers;

[0042] Step 3: Run a segmented intelligent water control inner string with three insert seals, two electric control production distributors, and one hydraulic control sliding sleeve production distributor;

[0043] Step 4: A set of tank-mounted electric submersible pump units was installed to upgrade the overall liquid production capacity of the segmented intelligent water control pipe column to meet the large liquid volume demand of the oil field.

[0044] Implementation effect: After the start of regulation, the second and third production layers were fully opened, and the first production layer at the root end was closed. The water content of the wellhead test dropped from 89.7% to 79.7%, a 10% drop in water content, and the daily oil production increased by 93.49 cubic meters per day. The effect of water control and oil increase was significant. After a period of use, the water content was 82.9%, and the daily oil production was 140.4 cubic meters per day, with a stable effect.

[0045] Example 2

[0046] The maximum fluid volume of the new and old wellbore in this well is 1590m each. 3 / d, the new wellbore is mined in two layers, and the canned pump-type segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method is implemented according to the following steps:

[0047] Step 1: Divide the well section into two external compartments according to reservoir characteristics;

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

[0049] Step 3: Run the segmented intelligent water control inner string with an insert seal, two hydraulic control sleeve production distributors, and a hydraulic control sleeve for old wellbore production;

[0050] Step 4: A set of tank-mounted electric submersible pump units was installed to meet the production needs of 3,000 cubic meters of large liquid volume.

[0051] Implementation effect: Currently, only the lowest test layer of the main branch is produced, and the water content is reduced by 53% compared with the production allocation data, and the oil production is more than doubled.

[0052] Compared with the prior art, the large-liquid tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method of the present application has the following advantages: the method of the present application realizes the profile adjustment 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 also realize the separate production and combined production of different layers, which greatly enhances the flexibility and convenience of production and reduces the cost of well repair; at the same time, the segmented intelligent water control inner pipe string in the present application is connected with an intelligent production distributor, which can realize the monitoring of downhole flow, temperature, pressure, nozzle opening and other data, and provide the most intuitive data for oil well production, thereby assisting production decision-making; in summary, the method proposed in the present application realizes the intelligent segmented flow control and water control of a large liquid volume of 3,000 cubic meters at sea, combines the external water control pipe string with the internal water control pipe string, establishes two water control flow resistance barriers, and significantly enhances the effect of stabilizing oil and controlling water.

[0053] It can be understood that the above embodiments only express the preferred implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of the claims of the present application.

Claims

1. A large-volume tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method, characterized in that: The following steps are involved: Step 1: Divide the well section to be developed into several different compartments according to reservoir characteristics, and set the combination of liquid-electric hybrid or pure electric-controlled intelligent production distributors through calculation; Step 2: according to the division of the compartments, the segmented intelligent water control outer pipe string is lowered, the well section is segmented externally using a mechanical physical separator, and the first water control flow resistance barrier is established using a water control mechanism; Step 3: According to the precise position of the segmented intelligent water control outer pipe string, the segmented intelligent water control inner pipe string is lowered, and the internal segmentation is performed using an insert seal. An intelligent production distributor is installed in each cabin to monitor the data in real time, and the intelligent production distributor is automatically adjusted according to the monitored data to establish a second water control flow resistance barrier; Step 4: Connect the canned suspension production string to the segmented intelligent water control inner string to improve the overall suspension, tension resistance and liquid production capabilities of the inner string to meet the needs of large liquid production.

2. The large-volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 1 is characterized in that: In step 1, a comprehensive analysis is performed based on the permeability, mud content, production allocation data, and wellbore trajectory data of the reservoir and combined with the simulation results to set the development well section as a plurality of external compartments.

3. The large-volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 1 is characterized in that: The segmented intelligent water control outer pipe string 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.

4. The large-volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 3 is characterized in that: The water control mechanism includes one or more of a water control screen pipe and a water control short joint, 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.

5. The large-volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 3 is characterized in that: The mechanical physical separator includes one or more of a swellable packer, a mechanical isolation packer and a chemical packer.

6. The large-volume tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 1 is characterized in that: In the above step 3, the segmented intelligent water control inner pipe string includes ground control equipment, tubing hanger, safety valve, sliding sleeve, cable production packer, working barrel, canned electric submersible pump unit, positioning bypass, insert seal, intelligent production distributor and round plug; The second water control flow resistance barrier established by the segmented intelligent water control inner pipe string can indirectly adjust the oil-water flow profile of the reservoir and realize separate production and combined production of different layers.

7. The large-volume canned suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment completion method according to claim 6 is characterized in that: The intelligent production distributor includes one or more of a hydraulically controlled production distributor, an electrically controlled production distributor or a wellbore pressure controlled production distributor.

8. The large-volume tank-mounted suspended segmented intelligent oil stabilization and water control real-time measurement and adjustment well completion method according to claim 6 or 7, characterized in that: The data monitored by the intelligent dispenser include flow rate, temperature, pressure and nozzle opening.

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