CN221322376U - Electric and earthquake synchronous monitoring system for deep well fracturing monitoring - Google Patents
Electric and earthquake synchronous monitoring system for deep well fracturing monitoring Download PDFInfo
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- CN221322376U CN221322376U CN202420427666.4U CN202420427666U CN221322376U CN 221322376 U CN221322376 U CN 221322376U CN 202420427666 U CN202420427666 U CN 202420427666U CN 221322376 U CN221322376 U CN 221322376U
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Abstract
The application relates to an electric and earthquake synchronous monitoring system for deep well fracturing monitoring, which comprises an electric potential and microseism synchronous acquisition array which is distributed on the ground surface above a fracturing position and is used for synchronously acquiring electric potential data and microseism data. In the monitoring system, each potential and microseism synchronous acquisition device in the potential and microseism synchronous acquisition array can monitor the potential signal and the microseism signal at the position of the potential and microseism synchronous acquisition device at the same time, so that the potential and microseism synchronous observation can be subjected to fracturing monitoring, a plurality of parameters can be synchronously obtained for comprehensive interpretation, and the accuracy and the reliability of interpretation can be greatly improved. Therefore, the problem of limitation of the prior art in large-depth (the depth is more than 4000 m) fracturing monitoring is solved.
Description
Technical Field
The utility model belongs to the technical field of deep well fracturing monitoring devices, and particularly relates to an electric and earthquake synchronous monitoring system for deep well fracturing monitoring.
Background
With the general entering of oil fields into the middle and later stages of oil and gas production, unconventional and ultra-low permeability resources become important strategic alternative resources. Unconventional ultra-low permeability resources are subjected to the intrinsic constraint of resources such as large depth, low porosity, low permeability and the like, and the economic productivity can be formed by large-scale fracturing transformation. The mainstream fracturing monitoring method comprises microseismic monitoring, distributed optical fiber monitoring, tracer monitoring, electromagnetic method monitoring and the like.
At present, deep fracturing mainly adopts a hydraulic fracturing mode, fracturing fluid is low-resistance, and transient flow change of a water body under the ground can cause abnormal change sensitivity of surface potential. In the electrohydraulic fracturing monitoring, alternating current is generally supplied through a shaft, potential observation is carried out on the surface of the fracturing fluid in the distribution range, and the trend and the distribution range of the fracturing fluid are deduced by observing abnormal changes of the surface potential in real time before fracturing, during fracturing and after fracturing.
In order to ensure that the signal can reflect the change of fracturing fluid, the surface potential change can be observed at the surface observation point simultaneously and in real time, the traditional potential measurement needs to be measured point by point, and the traditional potential measurement mode comprises the steps of arranging electrodes once but measuring the potentials of all points point by point. Microseism realizes the monitoring of the fracturing effect and the underground state change by observing the rock fracture acoustic emission phenomenon generated in the hydraulic fracturing process.
At present, unconventional fracturing monitoring is large in depth and is generally larger than 4000 meters, and a single method has own limitations under the condition of large depth, and if the potential and microseism synchronous observation can be realized to carry out fracturing monitoring, a plurality of parameters are comprehensively interpreted, so that the accuracy and the reliability of interpretation can be greatly improved.
Disclosure of utility model
Aiming at the problems existing in the prior art, the utility model provides an electric and earthquake synchronous monitoring system for deep well fracturing monitoring, which comprises an electric potential and microseism synchronous acquisition array which is arranged on the ground surface above a fracturing position and is used for synchronously acquiring electric potential data and microseism data;
The potential and microseism synchronous acquisition array comprises a plurality of potential and microseism synchronous acquisition devices; the potential and microseism synchronous acquisition device is electrically connected with an N pole arranged at a wellhead through a connecting wire respectively;
the system also comprises a receiving system for collecting the electric potential and the microseism data acquired by the electric potential and microseism synchronous acquisition device.
On the basis of the scheme, the potential and microseism synchronous acquisition device comprises an acquisition device main body system, a tail cone connected with the acquisition device main body system and an N-pole connecting column connected with the acquisition device main body system.
On the basis of the above scheme, the acquisition device main body system comprises:
The potential sensor is used for acquiring potential data at the ground surface;
Microseism sensor used for gathering the microseism data of the earth's surface;
The electric data storage card is used for storing the electric potential data acquired by the electric potential sensor;
the earthquake data storage card is used for storing the microseism data acquired by the microseism sensor;
a 4G module for transmitting data in the electric data storage card and the earthquake data storage card to a receiving system;
an M pole for connecting the tail cone and an N pole for connecting the N pole connecting post.
On the basis of the scheme, the acquisition device main body system comprises a GPS module for positioning the acquisition device main body system.
On the basis of the scheme, the electric data storage card and the earthquake data storage card are SIM cards.
On the basis of the scheme, each potential and microseism synchronous acquisition device in the potential and microseism synchronous acquisition array is connected with an N pole arranged at a wellhead through a connecting wire.
On the basis of the scheme, the potential and microseism synchronous acquisition devices in the potential and microseism synchronous acquisition array are divided into a plurality of rows, and the potential and microseism synchronous acquisition devices in each row are connected in series through a connecting wire and are connected with the N pole.
In the monitoring system, each potential and microseism synchronous acquisition device in the potential and microseism synchronous acquisition array can monitor the potential signal and the microseism signal at the position of the potential and microseism synchronous acquisition device at the same time, so that the potential and microseism synchronous observation can be subjected to fracturing monitoring, a plurality of parameters can be synchronously obtained for comprehensive interpretation, and the accuracy and the reliability of interpretation can be greatly improved. Therefore, the problem of limitation of the prior art in large-depth (the depth is more than 4000 m) fracturing monitoring is solved. In the system of the application, after the array layout is completed, each potential and microseism synchronous acquisition device in the array independently performs observation, and has no sequence or subordinate relation with other potential and microseism synchronous acquisition devices, and all potential and microseism synchronous acquisition devices can synchronously observe potential and microseism signals in real time and are not influenced by each other, thus being a main characteristic of the electric and seism synchronous array observation system of the application.
Drawings
FIG. 1 is a schematic diagram of a monitoring system according to the present application;
FIG. 2 is a schematic diagram of a synchronous acquisition device for electric potential and microseism in the monitoring system of the present application;
Fig. 3 is a schematic structural diagram of a main body system of an acquisition device in the monitoring system of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that, the directions or positional relationships indicated by the terms "inner", "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the product of the application is conventionally put in use, are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1, the application provides an electric and earthquake synchronous monitoring system for deep well fracturing monitoring, which comprises an electric potential and microseism synchronous acquisition array 1 which is arranged on the surface above a fracturing position (shown as B in fig. 1) and is used for synchronously acquiring electric potential data and microseism data; the deep well is greater than 4000m deep as shown in fig. 1 a.
The potential and microseism synchronous acquisition array 1 comprises a plurality of potential and microseism synchronous acquisition devices 1-1; the potential and microseism synchronous acquisition device 1-1 is electrically connected with an N pole 3 arranged at a wellhead through a connecting wire 2; the N pole is that a metal sleeve is arranged at the wellhead of the deep well, and the connecting wire 2 is connected with the metal sleeve.
And a receiving system 4 for collecting the electric potential and the microseism data acquired by the electric potential and microseism synchronous acquisition device 1-1.
Specifically, the size of the array varies according to the actual production situation, and the distance between two adjacent potential and microseism synchronous acquisition devices 1-1 is usually 15-25 meters.
In the monitoring system, each potential and microseism synchronous acquisition device 1-1 in the potential and microseism synchronous acquisition array 1 can monitor the potential signal and the microseism signal at the position of the potential and microseism synchronous acquisition device at the same time, so that the potential and microseism synchronous observation can be subjected to fracturing monitoring, a plurality of parameters can be synchronously obtained for comprehensive interpretation, and the accuracy and the reliability of interpretation can be greatly improved.
As a specific embodiment, as shown in FIG. 2, the synchronous acquisition device 1-1 for electric potential and microseism comprises an acquisition device body system 1-11, a caudal vertebra 1-12 connected with the acquisition device body system 1-11, and an N pole connecting post 1-13 connected with the acquisition device body system 1-11.
Further, as shown in fig. 3, the acquisition device body system 1-11 includes:
the potential sensor 1-21 is used for acquiring potential data at the ground surface;
microseism sensors 1-22 for acquiring microseism data at the earth's surface;
An electric data memory card 1-23 for storing electric potential data collected by the electric potential sensor 1-21;
a seismic data memory card 1-24 for storing microseism data acquired by the microseism sensors 1-22;
4G modules 1-25 for transmitting data in the electric data memory cards 1-23 and the shock data memory cards 1-24 to the receiving system 4;
And
M poles 1-27 for connecting the coccyx parts 1-12 and N poles 1-28 for connecting the N pole connecting posts 1-13.
As a specific embodiment, the electrical data storage cards 1-23 and the shock data storage cards 1-24 are both SIM cards. The 4G module 1-25 is connected with the SIM card and is used for communicating and transmitting data between the potential and microseism synchronous acquisition device 1-1 and a remote control center (namely the receiving system 4).
The potential sensor 1-21 can be a DC27L-1/4 digital potential difference meter of Hangzhou Nalon electronic technology Co., ltd; the microseismic sensors 1-22 may be PS-5GR model sensors from Weatheri Shuangfeng geophysical prospecting equipment Inc.
The measured data of the potential sensor 1-21 and the microseism sensor 1-22 are stored in the SIM memory card, and the 4G module 1-25 based on the 4G signal performs data interaction with the remote receiving system 4 to complete monitoring of the working state of the observation potential and microseism synchronous acquisition device 1-1, real-time data transmission and the like.
For the potential sensor 1-21, the tail cone 1-12 is a grounding electrode, and for the microseism sensor 1-22, the tail cone 1-12 is a part inserted into the ground to stabilize an instrument (the microseism sensor 1-22), the potential sensor 1-21 detects an electric signal, and the microseism sensor 1-22 detects a vibration signal, and the two signals are not interfered with each other, so that synchronous detection of the application can be realized. As a specific implementation scheme, the tail cone parts 1-12 are copper or stainless steel metal electrodes, the tail cone parts 1-12 are integrally conical, and the pointed ends are downward, so that the tail cone parts can be conveniently and directly inserted into the ground to form a measured M pole.
The potential and microseism synchronous acquisition device 1-1 is used as an M pole, the N pole 3 is arranged at a wellhead, and an N pole connecting column 1-13 of each potential and microseism synchronous acquisition device 1-1 is connected with the N pole 3 at the wellhead by a connecting wire 2 (namely a conducting wire), so that a potential sensor 1-21 in each potential and microseism synchronous acquisition device 1-1 measures the potential difference between the M pole and the N pole of the wellhead at the point, as shown in figure 1.
Although the connection line 2 is connected to the N-pole connection post 1-13 of the synchronous electric potential and microseism acquisition device 1-1 as shown in fig. 1, one end of the electric potential sensor 1-21 is connected to the M-pole 1-27 and the other end is connected to the N-pole 1-28, and the microseism sensor 1-22 is not electrically connected to the M-pole 1-27 and the N-pole 1-28 as shown in fig. 3 inside the acquisition device body system 1-11.
Microseism data measurement is independently carried out by the microseism sensors 1-22 in the potential and microseism synchronous acquisition device 1-1. In the electric and earthquake synchronous array observation system, after the array layout is completed, each electric potential and microseism synchronous acquisition device 1-1 in the array independently performs observation, and has no sequence or subordinate relation with other electric potential and microseism synchronous acquisition devices 1-1, and all electric potential and microseism synchronous acquisition devices 1-1 can synchronously observe electric potential and microseism signals in real time without being influenced by each other, which is a main characteristic of the electric and earthquake synchronous array observation system.
The N pole connecting post 1-13 of the potential and microseism synchronous acquisition device 1-1 is connected with the N pole 3 in various modes, and the application provides two specific embodiments. In addition to the above connection mode, each potential and microseism synchronous acquisition device 1-1 in the potential and microseism synchronous acquisition array 1 can be connected with an N pole 3 arranged at a wellhead through a different connecting wire 2, and the wiring of the second mode is easy to be confused, so that the first mode is recommended.
As a specific embodiment, in order to determine the precise location of each of the electric potential and microseismic synchronous acquisition devices 1-1, the acquisition device body system 1-11 further includes a GPS module 1-26 for locating the electric potential and microseismic synchronous acquisition device 1-1 based on the above-described scheme. Based on the GPS modules 1-26, the potential and microseismic measurement data of all stations in the array at the same moment can be obtained dynamically in real time.
In addition to locating the potentiometric and microseismic synchronous acquisition device 1-1, the GPS module 1-26 can also provide highly accurate time information to keep the potentiometric measurements and microseismic measurements synchronized in time.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The electric and earthquake synchronous monitoring system for deep well fracturing monitoring is characterized by comprising an electric potential and microseism synchronous acquisition array (1) which is arranged on the surface above a fracturing position and is used for synchronously acquiring electric potential data and microseism data;
The potential and microseism synchronous acquisition array (1) comprises a plurality of potential and microseism synchronous acquisition devices (1-1); the potential and microseism synchronous acquisition device (1-1) is electrically connected with an N pole (3) arranged at a wellhead through a connecting wire (2) respectively;
The system also comprises a receiving system (4) for collecting the electric potential and microseism data acquired by the electric potential and microseism synchronous acquisition device (1-1).
2. The electric and seismological synchronous monitoring system for deep well fracturing monitoring according to claim 1, characterized in that the electric potential and seismological synchronous collecting device (1-1) comprises a collecting device main body system (1-11), a tail cone (1-12) connected with the collecting device main body system (1-11) and an N-pole connecting column (1-13) connected with the collecting device main body system (1-11).
3. The electrical, seismological monitoring system for deep well fracturing monitoring according to claim 2, characterized in that said acquisition device body system (1-11) comprises:
a potential sensor (1-21) for acquiring potential data at the earth's surface;
microseismic sensors (1-22) for acquiring microseismic data at the earth's surface;
an electric data memory card (1-23) for storing electric potential data acquired by the electric potential sensor (1-21);
a seismic data memory card (1-24) for storing microseism data acquired by the microseism sensors (1-22);
A 4G module (1-25) for transmitting data in the electric data memory card (1-23) and the shock data memory card (1-24) to the receiving system (4);
m poles (1-27) for connecting the coccyx parts (1-12) and N poles (1-28) for connecting the N pole connecting posts (1-13).
4. An electrical, seismological monitoring system for deep well fracturing monitoring according to claim 3, characterized in that said acquisition device body system (1-11) further comprises a GPS module (1-26) for locating the electrical potential and microseism synchronous acquisition device (1-1).
5. An electric shock synchronous monitoring system for deep well fracturing monitoring according to claim 3, characterized in that the electric data memory card (1-23) and the shock data memory card (1-24) are SIM cards.
6. The electric and earthquake synchronous monitoring system for deep well fracturing monitoring according to claim 1, wherein each electric potential and microseism synchronous acquisition device (1-1) in the electric potential and microseism synchronous acquisition array (1) is connected with an N pole (3) arranged at a wellhead through a connecting wire (2) respectively.
7. The electric and earthquake synchronous monitoring system for deep well fracturing monitoring according to claim 1, wherein the electric potential and earthquake synchronous acquisition devices (1-1) in the electric potential and earthquake synchronous acquisition array (1) are divided into a plurality of rows, and the electric potential and earthquake synchronous acquisition devices (1-1) in each row are connected in series through one connecting wire (2) and are connected with an N pole (3).
8. The electrical and seismological monitoring system for deep well fracturing monitoring according to claim 1, characterized in that the distance between two adjacent electrical potential and seismological acquisition means (1-1) is 15-25m.
9. The electrical, shock synchronization monitoring system for deep well fracturing monitoring according to claim 2, characterized in that the caudal vertebral section (1-12) is copper or stainless steel.
10. An electric shock synchronous monitoring system for deep well fracturing monitoring according to claim 2, characterized in that the tail cone (1-12) is conical in shape as a whole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420427666.4U CN221322376U (en) | 2024-03-06 | 2024-03-06 | Electric and earthquake synchronous monitoring system for deep well fracturing monitoring |
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| CN202420427666.4U CN221322376U (en) | 2024-03-06 | 2024-03-06 | Electric and earthquake synchronous monitoring system for deep well fracturing monitoring |
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