CN115680627A - Electromagnetic wave well cementation parameter downhole monitoring device - Google Patents
Electromagnetic wave well cementation parameter downhole monitoring device Download PDFInfo
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- CN115680627A CN115680627A CN202211148760.8A CN202211148760A CN115680627A CN 115680627 A CN115680627 A CN 115680627A CN 202211148760 A CN202211148760 A CN 202211148760A CN 115680627 A CN115680627 A CN 115680627A
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Abstract
The invention relates to an electromagnetic wave well cementation parameter underground monitoring device, which comprises: the underground device is used for acquiring underground pressure and temperature data and transmitting the data to the ground in the form of electromagnetic waves after encoding; and the ground device is used for decoding the electromagnetic wave signals transmitted to the ground underground and monitoring the underground pressure and temperature in the well cementation operation period in real time. The invention has simple structure, low cost, safety, reliability and convenient construction, and can be widely applied to well operation.
Description
Technical Field
The invention relates to an electromagnetic wave well cementation parameter underground monitoring device, and relates to the technical field of well cementation.
Background
Conventional cementing techniques typically prevent kick and gas channeling by increasing the cement slurry density, but high density cement slurries and circulating pressures tend to fracture the formation, resulting in loss. The narrow density window and the shallow gas and water invasion problem present challenges to conventional well cementing techniques. In addition, when the upper stratum casing is fixed at sea, because the borehole size is large, the water loss of cement paste and the reduction of hydrostatic pressure are serious in the cement paste solidification stage by adopting the traditional well fixing technology, so that gas channeling and water invasion are easily caused, the integrity of a shaft is damaged, remediation is needed, and a well has to be abandoned in serious cases. Cement slurries used in well cementing sites tend to be more complex to influence by temperature and pressure, in which case describing the rheology of the cement slurry system requires the use of more complex rheology patterns.
With the acceleration of oil exploration pace and the development of drilling technology, the well depth is continuously increased, and the temperature and pressure in the well to be born by well cementing cement paste are higher and higher. However, the method is limited by the prior art means, the relationship between the rheological property of the cement slurry and the pressure and the temperature cannot be well determined, the downhole pressure and the temperature cannot be effectively monitored in real time in the current well cementation operation, and the downhole pressure and temperature data are urgently required to be effectively acquired in real time.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a downhole monitoring device for electromagnetic wave cementing parameters and a using method thereof, which are simple in structure, low in cost, safe and reliable.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the invention provides an electromagnetic wave downhole monitoring device for well cementation parameters, comprising:
the underground device is used for acquiring underground pressure and temperature data and transmitting the data to the ground in an electromagnetic wave form after encoding;
and the ground device is used for decoding the electromagnetic wave signals transmitted to the ground from the underground and monitoring the underground pressure and temperature in the well cementation operation period in real time.
Further, the downhole device comprises a downhole device body, an end cover and a measurement system;
the top of the underground device body is provided with a groove, and the measuring system is fixedly arranged in the groove; threads for connecting an external casing string are arranged at two ends of the underground device body;
the end cover is fixedly arranged on the groove of the underground device body, and the sealing ring is arranged on the surface, contacted with the groove, of the end cover, so that an inner cavity formed by connecting the end cover and the groove is a closed space, and the invasion of external liquid is prevented.
Further, the measuring system comprises a temperature sensor, a pressure sensor, a control circuit, an insulated antenna and a battery;
the temperature sensor is used for acquiring underground temperature data;
the pressure sensor is used for acquiring underground pressure data;
the control circuit is used for acquiring temperature and pressure data, encoding the temperature and pressure data and transmitting the temperature and pressure data to the ground in an electromagnetic wave mode through the insulated antenna;
and the battery is used for supplying power to the temperature sensor, the pressure sensor, the control circuit and the insulated antenna.
Furthermore, the control circuit comprises a signal modulation module, a low-pass filtering module and a power amplification module;
the signal modulation module is used for receiving temperature data from the temperature sensor and pressure data from the pressure sensor for modulation;
the low-pass filtering module is used for filtering the modulation signal;
and the power amplification module is used for amplifying the filtered signals and then sending the amplified signals to the insulated antenna.
Furthermore, the signal modulation module adopts a pulse position modulation mode.
Further, the ground device comprises a receiving device and an industrial control computer;
the receiving device is used for receiving electromagnetic wave signals transmitted to the ground underground;
and the industrial control computer is used for decoding the electromagnetic wave signals received by the receiving device to form corresponding underground temperature and underground pressure data.
In a second aspect, the invention also provides a use method of the downhole monitoring device for the electromagnetic wave cementing parameters, which comprises the following steps:
the underground device is connected with an upper casing string and a lower casing string through threads at two ends, and is integrally suspended in a well head in a casing string combination mode and placed in a well wall;
during the well cementation operation, cement slurry, spacer fluid and flushing fluid are sequentially injected into an upper casing string, a downhole device and a lower casing string through a wellhead and enter a shaft;
the underground device collects temperature and pressure data underground, transmits the data to the ground in the form of electromagnetic waves through the insulated antenna after encoding, receives electromagnetic wave signals and decodes the signals, and the ground device displays the underground pressure and temperature data formed by decoding on a screen of an industrial control computer of the ground device in real time and stores and records the underground pressure and temperature data.
Furthermore, a well cementation engineer adjusts the pressure profile in the shaft according to the acquired underground temperature and pressure data, and the well cementation success rate and the well cementation quality are improved.
Due to the adoption of the technical scheme, the invention has the following characteristics: the underground pressure and temperature monitoring device comprises an underground device and a ground device, wherein the underground device is used for acquiring underground pressure and temperature data, and the ground device acquires the underground pressure and temperature data to monitor the underground pressure and temperature during well cementation operation in real time.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a system block diagram of an electromagnetic wave downhole monitoring device for well cementation parameters according to an embodiment of the invention.
FIG. 2 is a block diagram of a downhole assembly according to an embodiment of the present invention.
FIG. 3 is a schematic view of the use state of the electromagnetic wave downhole monitoring device for well cementation parameters according to the embodiment of the present invention.
Detailed Description
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having," are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "upper", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Because the current well cementation operation can not effectively monitor the underground pressure and temperature in real time. The invention provides an electromagnetic wave well cementation parameter underground monitoring device and a using method thereof, wherein the electromagnetic wave well cementation parameter underground monitoring device comprises the following steps: the underground device is used for acquiring underground pressure and temperature data codes and then transmitting the data codes to the ground in an electromagnetic wave mode; and the ground device is used for decoding the electromagnetic wave signals transmitted to the ground from the underground and monitoring the underground pressure and temperature in the well cementation operation period in real time. Therefore, the invention has simple structure, low cost, safety, reliability and convenient construction, and can be widely applied to well operation.
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, the downhole monitoring device for electromagnetic wave cementing parameters provided by the present embodiment includes a downhole device 1 and a surface device 2.
The underground device 1 is used for acquiring underground pressure and temperature data, and transmitting the data to the ground in an electromagnetic wave form after coding;
and the ground device 2 is used for decoding the acquired electromagnetic wave signals transmitted to the ground from the underground and monitoring the underground pressure and temperature in the well cementation operation period in real time.
In a preferred embodiment, as shown in fig. 1 and 2, the downhole device 1 comprises a downhole device body 11, an end cap 12 and a measurement system comprising a temperature sensor 13, a pressure sensor 14, a control circuit 15, an insulated antenna 16 and a battery 17.
The top of the downhole device body 11 is provided with a groove 111, and the temperature sensor 13, the pressure sensor 14, the control circuit 15, the insulated antenna 16 and the battery 17 are fixedly arranged in the groove 111 through screws. The two ends of the downhole device body 11 are provided with threads meeting the API standard and used for connecting an upper casing string and a lower casing string respectively. The end cover 12 is fixed on the groove 111 of the downhole device body 1 in a covering mode through screws or welding, and a sealing ring is arranged on the surface, contacted with the groove 111 of the downhole device body 11, of the end cover 12, so that an inner cavity formed by connecting the end cover 2 and the groove 111 is a closed space, invasion of external liquid is prevented, and devices in the groove 111 are protected.
And the temperature sensor 13 is used for acquiring temperature data underground.
And a pressure sensor 14 for acquiring downhole pressure data.
And the control circuit 15 is used for acquiring temperature and pressure data, encoding the data and transmitting the data to the ground in the form of electromagnetic waves through the insulated antenna 16.
And a battery 17 for supplying power to the temperature sensor 13, the pressure sensor 14, the control circuit 15 and the insulated antenna 16.
Further, the control circuit 15 includes a signal modulation module 31, a low-pass filtering module 32 and a power amplifying module 33. The signal modulation module 31 receives the temperature data from the temperature sensor 13 and the pressure data from the pressure sensor 14 for modulation, the modulated signal filters high-frequency noise generated by a hardware circuit through the low-pass filtering module 32, and then the filtered signal is amplified through the power amplification module 33 and sent to the insulated antenna 16. The signal Modulation module 31 performs Modulation in a Pulse Position Modulation (PPM) manner.
In a preferred embodiment, as shown in FIG. 1, the surface unit 2 includes a receiving unit 21 and an industrial control computer 22.
The receiving device 21 is used for receiving electromagnetic wave signals transmitted to the ground underground, converting the received electromagnetic waves into electric signals, and restoring the electric signals into digital signals to be output after the electric signals are subjected to amplification, filtering, demodulation and other processing.
And the industrial control computer 22 is used for receiving the digital signals from the receiving device 21 and displaying corresponding downhole temperature and downhole pressure data.
The monitoring process of the electromagnetic wave cementing parameter downhole monitoring device provided by the embodiment is described in detail below.
As shown in fig. 3, the downhole device 11 is connected to the upper casing string 3 and the lower casing string 4 by means of two end threads, and is placed in the borehole wall 6 by being suspended in the casing string assembly as a whole from the well head 5.
During the cementing operation, the required cement slurry, spacer fluid and flushing fluid are injected sequentially through the wellhead 5 into the upper casing string 3, the downhole device 11 and the lower casing string 4 into the wellbore. The downhole device 11 collects temperature and pressure data in the well, transmits the data to the ground in the form of electromagnetic waves through the insulated antenna 16 after encoding, and receives electromagnetic wave signals and performs decoding processing by the ground device 2. The surface device 2 displays the decoded downhole pressure and temperature data on the screen of the industrial control computer 22 in real time and stores and records the data.
The well cementation engineer can timely and accurately master the complex change of the pressure of the shaft according to the acquired underground temperature and pressure data, and can more timely and finely adjust the pressure profile in the shaft, thereby improving the success rate of well cementation and the quality of well cementation.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In the description herein, references to the description of "one embodiment," "some implementations," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; while the invention has been described in detail with reference to the foregoing examples, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. An electromagnetic wave well cementation parameter downhole monitoring device, the device comprising:
the underground device is used for acquiring underground pressure and temperature data and transmitting the data to the ground in the form of electromagnetic waves after encoding;
and the ground device is used for decoding the electromagnetic wave signals transmitted to the ground underground and monitoring the underground pressure and temperature in the well cementation operation period in real time.
2. An electromagnetic wave cementing parameter downhole monitoring device according to claim 1, wherein the downhole device comprises a downhole device body, an end cap and a measurement system;
the top of the underground device body is provided with a groove, and the measuring system is fixedly arranged in the groove; threads for connecting an external casing string are arranged at two ends of the underground device body;
the end cover is fixedly arranged on the groove of the underground device body, and the surface of the end cover, which is in contact with the groove, is provided with the sealing ring, so that an inner cavity formed by connecting the end cover and the groove is a closed space, and the invasion of external liquid is prevented.
3. An electromagnetic wave cementing parameter downhole monitoring device according to claim 2, wherein the measurement system comprises a temperature sensor, a pressure sensor, a control circuit, an insulated antenna and a battery;
the temperature sensor is used for acquiring underground temperature data;
the pressure sensor is used for acquiring underground pressure data;
the control circuit is used for acquiring temperature and pressure data, encoding the temperature and pressure data, and transmitting the temperature and pressure data to the ground in the form of electromagnetic waves through the insulated antenna;
and the battery is used for supplying power to the temperature sensor, the pressure sensor, the control circuit and the insulated antenna.
4. The downhole electromagnetic wave cementing parameter monitoring device of claim 3, wherein the control circuit comprises a signal modulation module, a low-pass filtering module and a power amplification module;
the signal modulation module is used for receiving temperature data from the temperature sensor and pressure data from the pressure sensor for modulation;
the low-pass filtering module is used for filtering the modulation signal;
and the power amplification module is used for amplifying the filtered signals and then sending the amplified signals to the insulated antenna.
5. The electromagnetic wave downhole monitoring device for well cementation parameters according to claim 4, wherein the signal modulation module adopts a pulse position modulation mode.
6. An electromagnetic wave well cementation parameter downhole monitoring device according to any one of claims 1 to 4, wherein the surface device comprises a receiving device and an industrial control computer;
the receiving device is used for receiving electromagnetic wave signals transmitted to the ground underground;
and the industrial control computer is used for decoding the electromagnetic wave signals received by the receiving device to form corresponding underground temperature and underground pressure data.
7. The use method of the downhole monitoring device for the cementing parameters of the electromagnetic waves based on any one of the claims 1 to 6 is characterized by comprising the following steps:
the underground device is connected with the upper casing string and the lower casing string through threads at two ends, and is integrally suspended at a wellhead and placed in a well wall in a casing string combination mode;
during the well cementation operation, cement slurry, spacer fluid and flushing fluid are sequentially injected into an upper casing string, a downhole device and a lower casing string through a wellhead and enter a shaft;
the underground device collects temperature and pressure data underground, transmits the data to the ground in the form of electromagnetic waves through the insulated antenna after encoding, receives electromagnetic wave signals and decodes the signals, and the ground device displays the underground pressure and temperature data formed by decoding on a screen of an industrial control computer of the ground device in real time and stores and records the underground pressure and temperature data.
8. The use method of claim 7, further comprising adjusting a pressure profile in the wellbore by a cementing engineer according to the acquired downhole temperature and pressure data to improve cementing success rate and cementing quality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211148760.8A CN115680627A (en) | 2022-09-21 | 2022-09-21 | Electromagnetic wave well cementation parameter downhole monitoring device |
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| CN202211148760.8A CN115680627A (en) | 2022-09-21 | 2022-09-21 | Electromagnetic wave well cementation parameter downhole monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052380A (en) * | 2023-10-10 | 2023-11-14 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052380A (en) * | 2023-10-10 | 2023-11-14 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
| CN117052380B (en) * | 2023-10-10 | 2024-01-02 | 四川宏大安全技术服务有限公司 | Wireless pressure measurement device and method |
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