CN211874478U

CN211874478U - Hydraulic fracturing underground pressure flow data acquisition system

Info

Publication number: CN211874478U
Application number: CN202020513499.7U
Authority: CN
Inventors: 王建新; 张策; 丁立丰
Original assignee: Institute of Crustal Dynamics of China Earthquake Administration
Current assignee: National Institute of Natural Hazards
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-06
Anticipated expiration: 2030-04-09

Abstract

The embodiment of the application discloses hydraulic fracturing downhole pressure flow data acquisition system, including last packer, lower packer, connecting pipe, downhole pressure data acquisition unit, the bottom threaded connection who goes up the packer has the connecting pipe. According to the hydraulic fracturing underground pressure flow data acquisition system, the flow test unit is additionally arranged between the connecting pipe and the underground pressure data acquisition unit, the flow test unit can be used for accurately acquiring real-time flow data of a fracturing section in real time, the underground pressure data acquisition unit in the original system is matched, the flow data and the pressure data can be simultaneously acquired, the flow data of the fracturing section can be accurately acquired, the stress characteristic value of a hydraulic fracturing in-situ stress test can be more accurately acquired through flow-pressure coupling analysis, the accuracy of the result acquired by the testing method is greatly improved, and further application and development of the method are promoted.

Description

Hydraulic fracturing underground pressure flow data acquisition system

Technical Field

The application relates to the technical field of geotechnical engineering testing, in particular to a hydraulic fracturing underground pressure flow data acquisition system.

Background

The hydrofracturing in-situ stress testing technical system is the most widely and effectively applied method in engineering in-situ stress testing, the hydrofracturing method is adopted to measure the geostress, and various geostress parameters in the stratum can be obtained without knowing the mechanical parameters of a rock body; the method has the characteristics of simple equipment, convenience in operation, capability of carrying out continuous or repeated tests at any depth, high measurement speed, visual measured value, high measured value representativeness and the like, so the method has wide application prospect, the core technology part in the test system is an underground data acquisition system, but when the existing underground data acquisition system is used, the underground pressure sensor acquisition system placed in a fracturing section can only acquire the pressure value of the fracturing section, and the flow value of the fracturing section cannot be acquired; the flow value acquired by a flowmeter installed on the ground cannot accurately reflect the flow value of a fracturing section due to the influence of factors such as pipeline parameters and system flexibility, only underground pressure data can be acquired, and simultaneous acquisition of pressure and flow data cannot be realized, so that the application range of a hydraulic fracturing in-situ stress testing technical system is limited, and a hydraulic fracturing underground pressure and flow data acquisition system is provided.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a hydraulic fracturing downhole pressure flow data acquisition system to improve the above problems.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a hydraulic fracturing is pressure flow data collection system in pit, includes packer, lower packer, connecting pipe, pressure data collection unit in the pit, the bottom threaded connection who goes up the packer has the connecting pipe, the one end threaded connection who goes up the packer is kept away from to the connecting pipe has the flow test unit, the one end threaded connection of flow test unit is to the top of pressure data collection unit in the pit.

Optionally, a lower packer is arranged at the bottom end of the downhole pressure data acquisition unit.

The application provides a pair of hydraulic fracturing is pressure flow data acquisition system in pit possesses following beneficial effect:

1. the hydraulic fracturing underground pressure flow data acquisition system is characterized in that a flow test unit is additionally arranged between a connecting pipe and the underground pressure data acquisition unit, the flow test unit can be used for accurately acquiring real-time flow data of a fracturing section in real time, the flow data and the pressure data can be simultaneously acquired by matching the underground pressure data acquisition unit in the original system, the accurate acquisition of the flow data of the fracturing section can be realized, the stress characteristic value of a hydraulic fracturing in-situ stress test can be more accurately obtained through flow-pressure coupling analysis, the accuracy of the result obtained by the test method is greatly improved, the further application development of the method is promoted, and meanwhile, a scientific data basis is provided for deeply analyzing the fracturing mechanism of the pressure-flow coupling process of the hydraulic fracturing in-situ stress test.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic diagram of a hydraulic fracturing downhole pressure flow data acquisition system according to an embodiment of the application.

In the figure: 1. an upper packer; 2. a lower packer; 3. a connecting pipe; 4. a flow rate test unit; 5. a downhole pressure data acquisition unit.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, the present invention provides a technical solution: a hydrofracturing downhole pressure flow data acquisition system comprises an upper packer 1, a lower packer 2, a connecting pipe 3 and a downhole pressure data acquisition unit 5, wherein the bottom of the upper packer 1 is in threaded connection with the connecting pipe 3, one end of the connecting pipe 3, which is far away from the upper packer 1, is in threaded connection with a flow test unit 4, one end of the flow test unit 4 is in threaded connection with the top of the downhole pressure data acquisition unit 5, the flow test unit 4 is installed in a threaded connection mode, the flow test unit 4 is convenient to disassemble and overhaul, the use convenience of the hydrofracturing downhole pressure flow data acquisition system is improved, meanwhile, the flow test unit 4 can be used for accurately acquiring real-time flow data of a fracturing section in real time, and the flow test unit 4 is an existing flow test device and is applied to the system by being matched with the downhole pressure data acquisition unit 5 in the original system, the method can acquire flow data and pressure data simultaneously, accurately acquire the flow data of a fracturing section, can more accurately acquire the stress characteristic value of a hydrofracturing in-situ stress test through flow-pressure coupling analysis, greatly improve the accuracy of the result acquired by the testing method, promote the further application development of the method, provide a scientific data base for deeply analyzing the fracturing mechanism of the hydrofracturing in-situ stress test in the pressure-flow coupling process, improve the practicability of the hydrofracturing underground pressure flow data acquisition system, and arrange a lower packer 2 at the bottom of an underground pressure data acquisition unit 5.

In summary, according to the hydraulic fracturing downhole pressure flow data acquisition system provided by the application, when in use, the flow test unit 4 is in threaded connection between the connecting pipe 3 and the downhole pressure data acquisition unit 5, then the existing overall equipment of the hydraulic fracturing ground stress measurement system is used, the flow test unit 4 can be used for accurately acquiring real-time flow data of a fracturing section in real time, and the flow data and the pressure data can be simultaneously acquired by matching with the downhole pressure data acquisition unit 5 in the original system, so that the accurate acquisition of the flow data of the fracturing section can be realized, and the stress characteristic value of the hydraulic fracturing in-situ stress test can be more accurately obtained through flow-pressure coupling analysis.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. The utility model provides a hydraulic fracturing is pressure flow data acquisition system in pit, includes packer (1), packer (2), connecting pipe (3), pressure data acquisition unit (5) in the pit, its characterized in that: go up the bottom threaded connection of packer (1) and have connecting pipe (3), the one end threaded connection who goes away from last packer (1) in connecting pipe (3) has flow test unit (4), the one end threaded connection of flow test unit (4) is to the top of pressure data acquisition unit (5) in the pit.

2. The hydraulic fracturing downhole pressure flow data collection system of claim 1, wherein: and a lower packer (2) is arranged at the bottom end of the underground pressure data acquisition unit (5).