CN111980683A - Well temperature logging instrument - Google Patents
Well temperature logging instrument Download PDFInfo
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- CN111980683A CN111980683A CN202010824573.1A CN202010824573A CN111980683A CN 111980683 A CN111980683 A CN 111980683A CN 202010824573 A CN202010824573 A CN 202010824573A CN 111980683 A CN111980683 A CN 111980683A
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- 239000000523 sample Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to a well temperature logging instrument, which comprises a control chip, two temperature sensors and a strip-shaped probe tube, wherein the two temperature sensors are both connected with the control chip, and the two temperature sensors are sequentially arranged in the probe tube along the extension direction of the probe tube, obtaining the differential well temperature according to the signals respectively collected by the two temperature sensors, extending the probe into the well to be measured, according to the signals respectively collected by two temperature sensors arranged in the probe tube, the differential well temperature at different depths in the well to be measured can be conveniently and accurately obtained, it can be understood that the variation trend of the differential well temperature at different depths in the well to be measured can be obtained by changing the extending length of the probe tube extending into the well to be measured, and the well temperature logging instrument of this application's simple structure can not receive the restriction of the well head of treating the logging, and application scope is wide and the portability is strong.
Description
Technical Field
The invention relates to the technical field of well temperature logging, in particular to a well temperature logging instrument capable of measuring a micro-difference well temperature.
Background
The well temperature logging is also called thermal logging, and is a logging method for researching geological structure and rock stratum properties, searching useful mineral products and checking the technical condition of drilling according to the rule that the temperature in a drilling hole changes along with the depth.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a well temperature logging instrument capable of measuring the differential well temperature.
The technical scheme of the well temperature logging instrument is as follows:
including control chip, two temperature sensor and banding probe, two temperature sensor all connects control chip, and two temperature sensor follows the extending direction of probe sets gradually the inside of probe, according to two the signal that temperature sensor gathered respectively obtains the differential well temperature.
The well temperature logging instrument has the beneficial effects that:
stretch into the exploring tube and wait to log well, according to the signal that two temperature sensor that set up inside exploring tube gathered respectively, can conveniently and accurately obtain the differential well temperature when the different degree of depth in the awaiting measuring well, can understand, can also stretch into the length of stretching into in awaiting measuring well through changing the exploring tube to obtain the trend of change of the differential well temperature of the different degree of depth in the awaiting measuring well, and the simple structure of a well temperature logging instrument of this application, can not receive the restriction of the well head of awaiting measuring well, wide and the portability of application scope is strong.
On the basis of the scheme, the well temperature logging instrument can be further improved as follows.
Further, the control chip is further configured to:
acquiring difference signals between signals respectively acquired by the two temperature sensors;
and amplifying the difference signal to obtain an amplified signal, performing digital-to-analog conversion on the amplified signal to obtain a digital signal, and encoding the digital signal to obtain a display value displayed on the acquisition recorder.
The beneficial effect of adopting the further scheme is that: the micro-differential well temperature can be converted into a display value displayed on the acquisition recorder, and the variation trend of the micro-differential well temperature at different depths in the well to be measured can be obtained through the display value.
Further, two temperature sensor are first temperature sensor and second temperature sensor respectively, set up the ground electrode in the well head position of the well that awaits measuring, first temperature sensor compare in second temperature sensor is closer to the ground electrode, first temperature sensor with still be equipped with first electrode between the second temperature sensor, control chip still is used for obtaining according to a first formula first electrode with the first potential difference between the ground electrode, first formula is: SP ═ 4 (display value-base value)/wherein SP represents the first potential difference, and the base value represents a preset display value when the signal acquired by the first temperature sensor is the same as the signal acquired by the second temperature sensor.
The beneficial effect of adopting the further scheme is that: the rock characteristics in the well to be measured can be reflected through the first potential difference between the first electrode and the ground electrode.
Further, the control chip is further configured to: obtaining a second potential difference between the first electrode and the ground electrode according to a second formula, wherein the second formula is as follows: JF is (a second display value-base value)/4, where JF represents the second potential difference, and the second display value represents a display value after the first electrode and the ground electrode are powered off for a preset time period.
The beneficial effect of adopting the further scheme is that: and the rock characteristics in the well to be measured can be reflected through the second potential difference between the first electrode and the ground electrode.
And further, processing signals acquired by any one of the two temperature sensors into a temperature value, and sending the temperature value to the acquisition recorder for displaying.
The beneficial effect of adopting the further scheme is that: the temperature in the well to be measured can be directly displayed in the acquisition recorder, and the inspection is convenient.
Further, the distance between the two temperature sensors is 1 meter.
Furthermore, an isolation insulating sleeve is sleeved on the outer side of the probe tube.
The beneficial effect of adopting the further scheme is that: the isolating insulating sleeve is sleeved outside the probe tube to prevent the probe tube from being corroded and prevent the probe tube from touching the damage caused by the inner wall of the well to be logged.
Further, a second electrode is arranged in the probe tube and between the first electrode and the second temperature sensor and used for collecting current and/or voltage between the ground electrode and the second electrode.
The beneficial effect of adopting the further scheme is that: whether the insulating sleeve is damaged or not can be determined through the collected current and/or voltage between the ground electrode and the second electrode.
Drawings
FIG. 1 is a schematic diagram of a well temperature logging tool according to an embodiment of the present invention;
Detailed Description
As shown in fig. 1, the well temperature logging instrument according to the embodiment of the present invention includes a control chip, two temperature sensors and a strip-shaped probe 1, wherein the two temperature sensors are both connected to the control chip, the two temperature sensors are sequentially disposed inside the probe 1 along an extension direction of the probe 1, and the control chip obtains a differential well temperature according to signals respectively acquired by the two temperature sensors.
Stretch into the well waiting to be logged with probe 1, according to the signal that two temperature sensor that set up in probe 1 inside gathered respectively, can conveniently and accurately obtain the differential well temperature when the different degree of depth in the well waiting to be measured, can understand, can also stretch into the length of stretching into in the well waiting to be logged through changing probe 1 to obtain the trend of change of the differential well temperature of the different degree of depth in the well waiting to be measured, and the simple structure of a well temperature logging instrument of this application, can not receive the restriction of the well head waiting to be logged, wide and the portability of application scope is strong.
Wherein, adopt pt100 thermistor to gather the signal in waiting to log a well in every temperature sensor, can reach the precision of 0.001 ℃, all can use when ambient temperature is 0 ℃ -85 ℃, two temperature sensors can all through signal line or bluetooth module etc. with control chip connects to in two temperature sensors send the signal of gathering respectively to control chip through signal line or bluetooth module etc. the control chip accessible obtains the differential well temperature by following two kinds of modes, specifically:
1) obtaining two temperature values according to signals respectively collected by the two temperature sensors, wherein the difference between the two temperature values is the differential well temperature;
2) acquiring difference signals between signals respectively acquired by two temperature sensors, wherein a temperature value obtained according to the difference signals is the differential well temperature;
the distance between the two temperature sensors can be set according to actual conditions, such as 1 meter, 0.8 meter and the like, when the distance between the two temperature sensors is 1 meter, the differential well temperature refers to the differential well temperature spaced by 1 meter, and when the distance between the two temperature sensors is 0.8 meter, the differential well temperature refers to the differential well temperature spaced by 0.8 meter;
the probe 1 can be made of copper, aluminum alloy and the like, the length and the diameter of the probe can be set according to actual conditions, such as 2 meters or 1.66 meters and the like, the diameter can be 0.05 meters or 0.038 meters and the like, the pressure resistance value of the probe 1 is less than or equal to 20MPa, the weight is about 6 kilograms generally, the weight is light, and the probe is convenient to carry. And the afterbody of visiting pipe 1 is the toper, is convenient for stretch into from the well head of taking the well logging, and the head of visiting pipe 1 is equipped with and connects 7 to in connecting rope etc. stretch into the length of stretching into in waiting to log through tensile rope in order to change visiting pipe 1, in order to obtain the differential well temperature of the different degree of depth in waiting to measure, connect 7 can be: an annular groove convenient for connecting a rope is formed in the outer side of the probe tube 1; or, a through hole convenient for the rope is arranged in the radial direction of the probe 1;
wherein, temperature sensor accessible thread tightening mode is fixed in the inside of exploring tube 1, also can adopt other modes to fix.
Preferably, in the above technical solution, the control chip is further configured to:
acquiring difference signals between signals respectively acquired by the two temperature sensors;
and amplifying the difference signal to obtain an amplified signal, performing digital-to-analog conversion on the amplified signal to obtain a digital signal, and encoding the digital signal to obtain a display value displayed on the acquisition recorder.
The micro-differential well temperature can be converted into a display value displayed on the acquisition recorder, and the variation trend of the micro-differential well temperature at different depths in the well to be measured can be obtained through the display value.
The difference signal can be amplified by the amplifying circuit to obtain an amplified signal, the amplified signal is subjected to digital-to-analog conversion by the digital-to-analog converter or the digital-to-analog conversion circuit to obtain a digital signal, and the digital signal is newly encoded, specifically:
the temperature of 1 ℃ can be set to correspond to 50 codes, when the obtained differential well temperature is 1 ℃, the display value displayed on the acquisition and recording instrument is 50, and when the obtained differential well temperature is 10 ℃, the display value displayed on the acquisition and recording instrument is 500; the number of codes corresponding to 1 ℃ can also be set to 100, when the obtained differential well temperature is 1 ℃, the display value displayed on the acquisition recorder is 100, and when the obtained differential well temperature is 10 ℃, the display value displayed on the acquisition recorder is 1000, wherein the number of codes corresponding to 1 ℃ can be adjusted according to the actual situation, and is not described herein.
It can be understood that: to avoid showing values that are not negative, the value showing a differential well temperature of 0 ℃ may be defined as a certain base value, such as 1000, 2000, 5000, etc., for example: when the base value is 1000 and 1 ℃ is set to correspond to 50 codes, and when the obtained differential well temperature is 1 ℃, the display value displayed on the acquisition recorder is 1050 in the range of 50+ 1000; when the base value is 2000 and 1 ℃ is set to correspond to 50 codes, and when the obtained differential well temperature is 1 ℃, the display value displayed on the acquisition recorder is 50+ 2000-2050;
preferably, in the above technical solution, the two temperature sensors are a first temperature sensor 2 and a second temperature sensor 3, respectively, a ground electrode is disposed at a wellhead position to be logged, the first temperature sensor 2 is closer to the ground electrode than the second temperature sensor 3, a first electrode 4 is further disposed between the first temperature sensor 2 and the second temperature sensor 3, in the process of encoding the digital signal, the number of codes corresponding to 1 ℃ is 50, at this time, the first formula is SP ═ display value-base value)/4, the control chip is further configured to obtain a first potential difference between the first electrode 4 and the ground electrode according to a first formula, that is, obtain a first potential difference between the first electrode 4 and the ground electrode according to SP ═ display value-base value)/4, wherein SP represents the first potential difference, and the base value represents a preset display value when the signal collected by the first temperature sensor 2 is the same as the signal collected by the second temperature sensor 3.
The rock characteristics in the well to be measured can be reflected through the first potential difference between the first electrode 4 and the ground electrode.
Wherein, can be set as: when the temperature value obtained by the first temperature sensor 2 is higher than that obtained by the second temperature sensor 3, the display value is increased and decreased if the display value is negative, wherein the base value has a slow drift phenomenon along with the change of the temperature value, which is caused by the incomplete coincidence of the first temperature sensor 2 and the second temperature sensor 3, when the base value is 2000, the base value drift is less than 1000, the measurement of the differential well temperature is not influenced, and the influence of the logging speed is small when the differential well temperature is measured by the two temperature sensors.
Preferably, in the above technical solution, the control chip is further configured to: obtaining a second potential difference between the first electrode 4 and the ground electrode according to a second formula, specifically:
in the process of encoding the digital signal again, the number of codes corresponding to 1 ℃ is 50, and at this time, a second formula is JF ═ value (second display value-base value)/4, that is, a second potential difference between the first electrode 4 and the ground electrode is obtained according to JF ═ value (second display value-base value)/4, where JF represents the second potential difference, and the second display value represents a display value after the first electrode 4 and the ground electrode are powered off for a preset time period.
And reflecting the rock characteristics in the well to be measured from another angle through a second potential difference between the first electrode 4 and the ground electrode, wherein the preset time period is 3 seconds, 4 seconds, 5 seconds and the like.
Preferably, in the above technical solution, a second electrode 5 is further disposed in the probe 1 and between the first electrode 4 and the second temperature sensor 3, and is used for collecting current and/or voltage between the ground electrode and the second electrode 5, wherein an isolation insulating sleeve 6 is sleeved outside the probe 1.
Wherein, keep apart insulating cover 6 and be rubber tube or PVC pipe, through gathering ground electrode with current and voltage between the second electrode 5 can seek and keep apart insulating cover 6 whether to have the electric leakage, specifically:
when the isolation insulating sleeve 6 is not damaged, because the isolation insulating sleeve 6 is insulating, the current between the ground electrode and the second electrode 5 collected at this time is a certain fixed value, when a leakage point is generated after the isolation insulating sleeve 6 is damaged, the leakage point causes the isolation insulating sleeve 6 to be incompletely insulated, the current between the ground electrode and the second electrode 5 collected at this time is not a fixed value, that is, when the current between the ground electrode and the second electrode 5 collected is not a fixed value, it indicates that the isolation insulating sleeve 6 is damaged, so as to facilitate subsequent processing and reduce loss, when the current between the ground electrode and the second electrode 5 collected is a fixed value, it indicates that the isolation insulating sleeve 6 is not damaged, and is in a normal working state, wherein the function of the voltage between the ground electrode and the second electrode 5 collected is the same as the function of the current between the ground electrode and the second electrode 5 collected, and will not be described in detail herein.
Wherein, through set up isolation insulating cover 6 at the outside cover of probe 1 to prevent that probe 1 from corroding, and can prevent that probe 1 from touching the produced damage of the inner wall of waiting to log a well.
Preferably, in the above technical solution, the signal acquired by any one of the two temperature sensors is processed into a temperature value, and is sent to the acquisition recorder for display.
The temperature in the well to be measured can be directly displayed in the acquisition recorder, and the inspection is convenient.
The acquisition recorder can be understood as a display with a processor, and the processor acquires a display value and each temperature value and sends the display value and each temperature value to the display for displaying.
It will be appreciated that the current and voltage between the second electrodes 5 are also converted to values that are displayed on the acquisition recorder, as shown in table 1 below:
table 1:
in the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 the invention. 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. The utility model provides a well temperature logging instrument, its characterized in that, includes control chip, two temperature sensor and banding spy pipe (1), two temperature sensor all connects control chip, and two temperature sensor follows the extending direction of spy pipe (1) sets gradually the inside of spy pipe (1), control chip is according to two the signal that temperature sensor gathered respectively obtains the differential well temperature.
2. The borehole logging tool of claim 1, wherein the control chip is further configured to:
acquiring difference signals between signals respectively acquired by the two temperature sensors;
and amplifying the difference signal to obtain an amplified signal, performing digital-to-analog conversion on the amplified signal to obtain a digital signal, and encoding the digital signal to obtain a display value displayed on the acquisition recorder.
3. A well temperature logging instrument according to claim 2, wherein the two temperature sensors are a first temperature sensor (2) and a second temperature sensor (3), respectively, a ground electrode is disposed at the wellhead position of the well to be measured, the first temperature sensor (2) is closer to the ground electrode than the second temperature sensor (3), a first electrode (4) is further disposed between the first temperature sensor (2) and the second temperature sensor (3), the control chip is further configured to obtain a first potential difference between the first electrode (4) and the ground electrode according to a first formula, and the first formula is: SP ═ 4 (display value-base value)/wherein SP represents the first potential difference, and the base value represents a preset display value when the signal collected by the first temperature sensor (2) is the same as the signal collected by the second temperature sensor (3).
4. The borehole logging tool of claim 3, wherein the control chip is further configured to: -deriving a second potential difference between the first electrode (4) and the ground electrode according to a second formula: JF is (a second display value-base value)/4, where JF represents the second potential difference, and the second display value represents a display value after a preset period of time in which the first electrode (4) and the ground electrode are powered off.
5. The well temperature logging instrument according to claims 2-4, wherein the control chip is further configured to process a signal acquired by any one of the two temperature sensors into a temperature value, and send the temperature value to the acquisition recorder for display.
6. A well temperature logging instrument according to any of claims 1-4, wherein the distance between said two temperature sensors is 1 meter.
7. A well temperature logging instrument according to any of claims 3 or 4, wherein the probe (1) is provided with an insulating jacket (6) on the outside.
8. A well temperature logging instrument according to claim 7, wherein a second electrode (5) is further arranged in the probe (1) between the first electrode (4) and the second temperature sensor (3) for collecting current and/or voltage between the surface electrode and the second electrode (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824573.1A CN111980683A (en) | 2020-08-17 | 2020-08-17 | Well temperature logging instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824573.1A CN111980683A (en) | 2020-08-17 | 2020-08-17 | Well temperature logging instrument |
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| CN111980683A true CN111980683A (en) | 2020-11-24 |
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| CN202010824573.1A Pending CN111980683A (en) | 2020-08-17 | 2020-08-17 | Well temperature logging instrument |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8312126D0 (en) * | 1983-05-04 | 1983-06-08 | Qmc Ind Res | Geothermal measuring apparatus |
| US20030234921A1 (en) * | 2002-06-21 | 2003-12-25 | Tsutomu Yamate | Method for measuring and calibrating measurements using optical fiber distributed sensor |
| US20040129418A1 (en) * | 2002-08-15 | 2004-07-08 | Schlumberger Technology Corporation | Use of distributed temperature sensors during wellbore treatments |
| CN2685568Y (en) * | 2003-11-14 | 2005-03-16 | 中国石化胜利油田有限公司临盘采油厂 | Thermometric device for logger |
| CN101699027A (en) * | 2009-11-16 | 2010-04-28 | 大庆油田有限责任公司 | Underground oil- water two-phase flow rate measuring method used for low production liquid horizontal well |
| CN202140083U (en) * | 2011-06-30 | 2012-02-08 | 西安思坦仪器股份有限公司 | Double-well temperature measurement and leakage measurement well logger |
| CN103075146A (en) * | 2011-10-25 | 2013-05-01 | 中国石油化工股份有限公司 | Differential temperature and pressure tester for horizontal well for thermal recovery |
| CN104500028A (en) * | 2014-11-07 | 2015-04-08 | 贝兹维仪器(苏州)有限公司 | Strip measuring exploration plate |
| CN106499348A (en) * | 2016-11-04 | 2017-03-15 | 吉林省三和电气系统工程有限公司 | A kind of testing pressure down hole measuring temp. wire cable |
| CN209494559U (en) * | 2019-01-29 | 2019-10-15 | 中核坤华能源发展有限公司 | A kind of high-precision well temperature survey meter |
| CN110686791A (en) * | 2019-11-08 | 2020-01-14 | 浙江泰索科技有限公司 | Ultra-long high-temperature and high-pressure resistant multi-point oil well temperature sensor and preparation method thereof |
-
2020
- 2020-08-17 CN CN202010824573.1A patent/CN111980683A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8312126D0 (en) * | 1983-05-04 | 1983-06-08 | Qmc Ind Res | Geothermal measuring apparatus |
| US20030234921A1 (en) * | 2002-06-21 | 2003-12-25 | Tsutomu Yamate | Method for measuring and calibrating measurements using optical fiber distributed sensor |
| US20040129418A1 (en) * | 2002-08-15 | 2004-07-08 | Schlumberger Technology Corporation | Use of distributed temperature sensors during wellbore treatments |
| CN2685568Y (en) * | 2003-11-14 | 2005-03-16 | 中国石化胜利油田有限公司临盘采油厂 | Thermometric device for logger |
| CN101699027A (en) * | 2009-11-16 | 2010-04-28 | 大庆油田有限责任公司 | Underground oil- water two-phase flow rate measuring method used for low production liquid horizontal well |
| CN202140083U (en) * | 2011-06-30 | 2012-02-08 | 西安思坦仪器股份有限公司 | Double-well temperature measurement and leakage measurement well logger |
| CN103075146A (en) * | 2011-10-25 | 2013-05-01 | 中国石油化工股份有限公司 | Differential temperature and pressure tester for horizontal well for thermal recovery |
| CN104500028A (en) * | 2014-11-07 | 2015-04-08 | 贝兹维仪器(苏州)有限公司 | Strip measuring exploration plate |
| CN106499348A (en) * | 2016-11-04 | 2017-03-15 | 吉林省三和电气系统工程有限公司 | A kind of testing pressure down hole measuring temp. wire cable |
| CN209494559U (en) * | 2019-01-29 | 2019-10-15 | 中核坤华能源发展有限公司 | A kind of high-precision well temperature survey meter |
| CN110686791A (en) * | 2019-11-08 | 2020-01-14 | 浙江泰索科技有限公司 | Ultra-long high-temperature and high-pressure resistant multi-point oil well temperature sensor and preparation method thereof |
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