Horizontal well fluid production profile monitoring device

Abstract

The invention relates to the technical field of oil and gas resource exploration and development, in particular to a horizontal well fluid production profile monitoring device which comprises a connecting assembly, a chip capsule and a monitoring body capable of being sleeved with a sleeve. The device is reasonable and compact in structure, when the device is used, the upper end of the monitoring body is installed on the lower portion of a fracturing bridge plug, and when perforation-bridge plug integrated fracturing is carried out, the monitoring body is pumped to an expected position for setting along with the fracturing bridge plug; a data acquisition module in a monitoring body at the lower part of each stage of fracturing bridge plug acquires and monitors temperature, pressure, water holding rate and flow data, data acquisition is completed after a certain time, the fracturing bridge plug is drilled and ground by a coiled tubing, when the upper part of the fracturing bridge plug and the upper end of a connecting assembly are drilled and ground off, a baffle falls off, and a shell is popped out under the action of an elastic reset piece; and then the shell and the data acquisition module are flushed to the ground for recovery through well flushing operation. The problems that an existing horizontal well production fluid profile monitoring test is high in cost and low in precision are solved.

Description

Technical Field

[0001] This invention relates to the field of oil and gas resource exploration and development technology, and is a horizontal well production profile monitoring device. Background Technology

[0002] my country is rich in low-permeability and unconventional oil and gas resources, which have become important targets for development in recent years. In order to improve reservoir utilization, horizontal well staged fracturing has become the main technology for exploration and development. Due to the strong heterogeneity of reservoirs, the production effect after staged fracturing varies greatly. It is urgent to understand the production contribution and effect of each stage and cluster to provide an important basis for reservoir understanding and development scheme optimization.

[0003] Currently, the main technologies for testing production profiles in horizontal wells include crawler + production profile testing instrument, coiled tubing + production profile testing instrument, and fiber optic coiled tubing testing technology. These technologies are expensive, and the installation of testing tools can affect the differentiation of oil, gas, and water in the wellbore, thus impacting the test results. There is an urgent need for a horizontal well production profile monitoring device to solve the problems of high testing costs and low accuracy. Summary of the Invention

[0004] This invention provides a horizontal well production profile monitoring device that overcomes the shortcomings of the prior art and effectively solves the problems of high testing costs and low accuracy of existing horizontal well production profile monitoring devices.

[0005] The technical solution of the present invention is achieved through the following measures: a horizontal well production profile monitoring device, comprising a connecting component, a chip capsule, and a monitoring body that can be fitted into the casing. The upper center of the monitoring body is provided with a through hole running vertically through it. At least one downward-opening mounting groove is distributed circumferentially at intervals along the lower end of the monitoring body. A baffle is provided at the lower end of the monitoring body. A connecting component is provided in the through hole, which allows the upper end of the baffle to contact the lower end of the monitoring body. A sampling hole running vertically through it is provided at the lower end of the baffle corresponding to each mounting groove position. A chip capsule is installed in each mounting groove. The chip capsule includes a shell and a data acquisition module. A data acquisition module capable of monitoring the downhole environment is provided in each shell. An elastic reset member is installed between the upper end of each shell and the upper inner side of the corresponding mounting groove, so that the lower end of the shell abuts against the upper end of the baffle.

[0006] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned connecting components may include a connecting body, an upper support body, and a lower support body. A through hole is provided in the center of the baffle corresponding to the perforation position. A lower support body is provided at the lower end of the baffle. An upper support body is provided at the upper end of the monitoring body. A connecting body is fixedly connected between the upper support body and the lower support body, enabling the upper end of the baffle to contact the lower end of the monitoring body. The connecting body passes through the perforation.

[0007] The diameter of the perforation and the diameter of the through hole can be the same. Both the upper and lower supports are spherical, and the diameter of the upper support is smaller than that of the lower support.

[0008] The upper part of the baffle may be provided with an outward-facing groove, and the lower end of the monitoring body is in contact with the inner wall of the groove.

[0009] The above may also include a fracturing bridge plug, wherein the outer side of the upper end of the monitoring body is screwed together with the inner side of the lower end of the fracturing bridge plug.

[0010] This invention features a reasonable and compact structure. During use, the upper end of the monitoring body is installed at the lower part of the fracturing bridge plug. During integrated perforation-bridge plug fracturing, the monitoring body is pumped to the designated location and sealed along with the fracturing bridge plug. The monitoring body can be installed at the lower part of each fracturing bridge plug. Once production stabilizes, the data acquisition module inside the monitoring body at the lower part of each fracturing bridge plug collects and monitors temperature, pressure, water holdup, and flow rate data. After a certain period, data acquisition is completed. The fracturing bridge plug is then ground down using coiled tubing. When the upper part of the fracturing bridge plug and the upper end of the connecting assembly are ground down, the baffle falls off, and the shell is ejected by the elastic reset component. Then, the shell and data acquisition module are flushed to the surface for recovery through well washing. After recovery, the data stored in the data sphere can be read using a surface reader. The data acquisition module and shell have low acquisition cost and difficulty, and high accuracy. This invention solves the problems of high cost and low accuracy in existing horizontal well production profile monitoring and testing, especially in deep heavy oil horizontal wells where production profile monitoring errors are large. Attached Figure Description

[0011] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments one to five of the present invention.

[0012] The codes in the attached diagram are as follows: 1 is the casing, 2 is the monitoring body, 3 is the perforation, 4 is the mounting groove, 5 is the baffle, 6 is the sampling hole, 7 is the housing, 8 is the data acquisition module, 9 is the elastic reset component, 10 is the connector, 11 is the upper support, 12 is the lower support, 13 is the through hole, 14 is the groove, and 15 is the fracturing bridge plug. Detailed Implementation

[0013] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0014] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0015] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 As shown, the horizontal well production profile monitoring device includes a connecting component, a chip capsule, and a monitoring body 2 that can be fitted inside the casing 1. The upper center of the monitoring body 2 has a through hole 3 that runs vertically through it. The lower end of the monitoring body 2 has at least one downward-facing mounting groove 4 distributed circumferentially. The lower end of the monitoring body 2 has a baffle 5. The through hole 3 has a connecting component that allows the upper end of the baffle 5 to contact the lower end of the monitoring body 2. The lower end of the baffle 5 corresponding to each mounting groove 4 has a sampling hole 6 that runs vertically through it. Each mounting groove 4 has a chip capsule installed in it. The chip capsule includes a housing 7 and a data acquisition module 8. Each housing 7 has a data acquisition module 8 that can monitor the downhole environment. The upper end of each housing 7 and the upper inner side of the corresponding mounting groove 4 are fitted with an elastic reset member 9 that allows the lower end of the housing 7 to abut against the upper end of the baffle 5.

[0016] According to the requirements, the elastic reset component 9 is a known technology, such as a compression spring. The monitoring body 2 and the connecting component are made of composite drillable material, which facilitates the subsequent drilling and grinding of the upper end of the connecting component so that the baffle 5 can fall off. The composite drillable material is a known technology and has the characteristics of easy drilling and milling, low chip density, and easy circulation and discharge from the well barrel. The composite drillable material can be the aging-resistant drillable composite material described in Chinese patent document CN112694713A. The chip capsule is a known technology. The outer side of the shell 7 has test holes that connect the inside and outside. The shell 7 and the data acquisition module 8 can form a known data ball, or it can be a mobile pressure acquisition ball based on serial port data transmission as described in Chinese patent document CN103926037A. The shell 7 can support a capsule shape or a ball shape as required. The data acquisition module 8 can collect temperature, pressure, water holding capacity and flow rate data.

[0017] In use, the upper end of the monitoring body 2 is installed on the lower part of the existing known fracturing bridge plug 15. During perforation-bridge plug integrated fracturing, the monitoring body 2 is pumped to the expected position and sealed together with the fracturing bridge plug 15. The monitoring body 2 can be installed on the lower part of each stage of fracturing bridge plug 15. After the trial production is stable, the data acquisition module 8 in the monitoring body 2 at the lower part of each stage of fracturing bridge plug 15 collects and monitors temperature, pressure, water holdup and flow rate data. After a certain period of time, the data acquisition is completed, and the fracturing bridge plug 15 is ground off by the coiled tubing. When the upper part and the upper end of the connecting component are connected, the baffle 5 falls off, and the housing 7 is ejected under the action of the elastic reset member 9. Then, the housing 7 and the data acquisition module 8 are washed to the ground for recovery through well washing operation. After recovery, the data stored in the data ball can be read by the ground reader. The data acquisition module 8 and the housing 7 have low data acquisition cost and low acquisition difficulty, and high accuracy. This invention solves the problem of high cost and low accuracy of existing horizontal well production profile monitoring and testing, especially the problem of large error in production profile monitoring in deep heavy oil horizontal wells.

[0018] The above-mentioned horizontal well production profile monitoring device can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 As shown, the connecting assembly includes a connecting body 10, an upper support body 11, and a lower support body 12. A through hole 13 is provided in the center of the baffle 5 corresponding to the position of the through hole 3. The lower end of the baffle 5 is provided with a lower support body 12. The upper end of the monitoring body 2 is provided with an upper support body 11. A connecting body 10 is fixedly connected between the upper support body 11 and the lower support body 12, which allows the upper end of the baffle 5 to contact the lower end of the monitoring body 2. The connecting body 10 passes through the through hole 3.

[0019] Depending on the requirements, the connector 10 can be made of existing known technology, such as a connecting rope or a connecting rod. To facilitate the installation between the upper support 11 and the lower support 12, the connector 10 uses a connecting rod. The upper support 11 and the lower support 12 are threaded together by a connecting rod that allows the upper end of the baffle 5 to contact the lower end of the monitoring body 2. The connecting rod passes through the through hole 3. During use, the lower support 12 is provided at the lower end of the baffle 5. After the connector 10 is tightened, the lower support 12 can provide support for the baffle 5.

[0020] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 As shown, the diameter of the perforation 3 is the same as the diameter of the through hole 13. Both the upper support 11 and the lower support 12 are spherical, and the diameter of the upper support 11 is smaller than the diameter of the lower support 12.

[0021] During use, the diameter of the upper support 11 is smaller than the diameter of the lower support 12. This allows the upper support 11 to be quickly drilled away, causing the lower support 12 to lose its supporting function on the baffle 5. This allows the baffle 5 to separate from the monitoring body 2 and open the mounting slot 4, allowing the housing 7 and the data acquisition module 8 to enter the sleeve 1, facilitating the recovery of the housing 7 and the data acquisition module 8.

[0022] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 As shown, the upper end of the baffle 5 is provided with an outward-facing groove 14, and the lower end of the monitoring body 2 is in contact with the inner wall of the groove 14.

[0023] During use, the groove 14 ensures the relative position of the monitoring body 2 and the baffle 5, preventing the monitoring body 2 and the baffle 5 from becoming misaligned during movement, which could cause the housing 7 and the data acquisition module 8 to be ejected by the elastic reset piece 9, resulting in the failure of the data acquisition operation.

[0024] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1As shown, it also includes a fracturing bridge plug 15, with the outer side of the upper end of the monitoring body 2 screwed together with the inner side of the lower end of the fracturing bridge plug 15.

[0025] During use, this setup facilitates the installation of the monitoring body 2 and the fracturing bridge plug 15 together. The fracturing bridge plug 15 can be installed inside the casing 1 at the target location to collect downhole environmental data. After data collection is completed, the fracturing bridge plug 15 is drilled and ground. After the upper support body 11 is ground off and the upper end of the connector 10 is loosened, the lower support body 12 and the baffle 5 fall together, the lower part of the mounting groove 4 is opened, and the housing 7 is pushed out of the mounting groove 4 under the action of the elastic reset member 9. Then, the housing 7 is flushed to the surface for recovery through well washing operations, and then the data collected by the data acquisition module 8 inside the housing 7 is obtained.

[0026] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0027] The usage process of the preferred embodiment of the present invention: The first step is to use composite drillable materials to manufacture the monitoring body 2, the upper support 11, the lower support 12 and the baffle 5; The second step is to sequentially insert the compression spring and the housing 7 containing the data acquisition module 8 into the mounting slot 4. The third step is to install the baffle 5 and make the sampling hole 6 correspond to the mounting groove 4. The fourth step is to connect the lower end of the connector 10 to the lower support 12, and then connect the upper end of the connector 10 to the upper support 11 after passing through the through hole 13 and the through hole 3 in sequence, so as to ensure that the inner wall of the groove 14 of the lower baffle 5 is in contact with the lower end of the monitoring body 2. The fifth step is to screw the upper end of the monitoring body 2 to the lower inner wall of the fracturing bridge plug 15 and then lower it into the target position inside the casing 1. Step 6: After the data acquisition module 8 finishes acquiring the data in the well, the drill string is lowered in and the fracturing bridge plug 15 is drilled and ground. When the upper support body 11 is drilled, the upper end of the connecting body 10 separates from the upper support body 11, the baffle 5 falls off, and the shell 7 is ejected. The shell 7 is flushed to the ground and recovered by well washing, thereby obtaining the data collected by the data acquisition module 8.

[0028] This invention has been applied and verified in multiple blocks such as Xinjiang Oilfield and Tarim Oilfield, with significant results.

Claims

1. A horizontal well production profile monitoring device, characterized in that... The system includes a connecting component, a chip capsule, and a monitoring body that can be fitted into a casing. The monitoring body has a through hole at the center of its upper end, and at least one downward-facing mounting slot is distributed circumferentially at intervals at the lower end of the monitoring body. A baffle is provided at the lower end of the monitoring body, and a connecting component is provided in the through hole to allow the upper end of the baffle to contact the lower end of the monitoring body. A sampling hole is provided at the lower end of the baffle corresponding to each mounting slot. A chip capsule is installed in each mounting slot. The chip capsule includes a housing and a data acquisition module. A data acquisition module capable of monitoring the downhole environment is provided in each housing. An elastic reset member is installed between the upper end of each housing and the upper inner side of the corresponding mounting slot so that the lower end of the housing abuts against the upper end of the baffle.

2. The horizontal well production profile monitoring device according to claim 1, characterized in that... The connecting assembly includes a connector, an upper support, and a lower support. A through hole is provided in the center of the baffle corresponding to the perforation position. A lower support is provided at the lower end of the baffle, and an upper support is provided at the upper end of the monitoring body. A connector is fixedly connected between the upper support and the lower support, which allows the upper end of the baffle to contact the lower end of the monitoring body. The connector passes through the perforation.

3. The horizontal well production profile monitoring device according to claim 2, characterized in that... The diameter of the perforation is the same as the diameter of the through hole. Both the upper and lower supports are spherical, with the diameter of the upper support being smaller than that of the lower support.

4. The horizontal well production profile monitoring device according to claim 1, 2, or 3, characterized in that... The upper part of the baffle has an outward-facing groove, and the lower part of the monitoring body is in contact with the inner wall of the groove.

5. The horizontal well production profile monitoring device according to claim 1, 2, or 3, characterized in that... It also includes a fracturing bridge plug, with the outer side of the upper end of the monitoring body screwed together with the inner side of the lower end of the fracturing bridge plug.

6. The horizontal well production profile monitoring device according to claim 5, characterized in that... It also includes a fracturing bridge plug, with the outer side of the upper end of the monitoring body screwed together with the inner side of the lower end of the fracturing bridge plug.

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