CN109488287B - Neutron and densimeter data synchronization method - Google Patents
Neutron and densimeter data synchronization method Download PDFInfo
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- CN109488287B CN109488287B CN201811295626.4A CN201811295626A CN109488287B CN 109488287 B CN109488287 B CN 109488287B CN 201811295626 A CN201811295626 A CN 201811295626A CN 109488287 B CN109488287 B CN 109488287B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
Abstract
The invention discloses a data synchronization method for a neutron densitometer, which comprises the steps that a synchronization pulser is arranged on the neutron densitometer and is used for sending a synchronization pulse signal; the synchronous pulse signals are transmitted to each short section of the neutron and density instrument through a synchronous pulse line; each short joint of the neutron and density instrument is provided with a counter for counting pulse signals and sampling signals; dividing the measurement data into eight sectors on a tool measurement surface according to the frequency and the rotating speed of the pulse signals, wherein each sector has an angle of 45 degrees; the invention effectively avoids the response interruption of the processor, ensures the implementation, saves the cost and improves the sampling efficiency.
Description
Technical Field
The invention relates to the technical field of well drilling, in particular to a neutron and densitometer data synchronization method.
Background
The new logging-while-drilling technology embodies the aim of producing oil and gas at the lowest cost, and a directional process in the drilling process is generated in order to more accurately evaluate the stratum. The requirements of the petroleum industry on the measurement accuracy and reliability make the application field of the logging-while-drilling technology continuously expanded, and the logging-while-drilling technology pushes the well drilling to a higher level. Aiming at the characteristics that most of oil fields in China are in the middle and later development stages at present, thin-layer and small-fault-block oil and gas reservoirs are developed, the logging-while-drilling technology can provide a main technical means for real-time geological guiding and stratum evaluation.
The complex lithologic stratum is an important exploration field of petroleum and natural gas in China, and detection aiming at lithologic characteristics of the complex lithologic stratum is a difficult research hotspot. The development of the drilling technology provides a new idea for the research of complex stratums such as complex reservoirs, complex oil reservoirs and fault block oil reservoirs, improves the working efficiency and has extremely important significance for developing oil and gas reservoirs.
The invention discloses a data synchronization method of a neutron densimeter, which not only ensures the continuity and the accuracy of data acquisition, but also does not increase the complexity of a program and also saves the cost.
Disclosure of Invention
In view of the above problems of the prior art, it is an object of the present invention to provide a method for synchronizing neutron and densitometer data.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
the invention provides a data synchronization method for a neutron density instrument and a densitometer, which comprises the following steps:
s1: a synchronous pulser is arranged on the neutron and density instrument and used for sending a synchronous pulse signal;
s2: the synchronous pulse signals are transmitted to each short section of the neutron and density instrument through a synchronous pulse line;
s3: each short section of the neutron and density instrument is provided with a counter for counting pulse signals and sampling signals;
s4: dividing the measurement data into eight sectors on the measurement surface of the tool according to the frequency and the rotating speed of the pulse signals, wherein each sector has an angle of 45 degrees;
s5: and determining the accurate time and the sector of each sample according to the counting calculation of the pulse signals and the sampling signals.
Further, the neutron and density meter comprises a neutron pup joint, an ultrasonic distance measuring pup joint and a density pup joint, wherein the neutron pup joint comprises a neutron processor and is used for measuring formation porosity data; the ultrasonic ranging nipple comprises an ultrasonic processor and is used for measuring the distance from the measuring instrument to the well wall; the density pup joint comprises a density processor for measuring the formation density and the photoelectric coefficient; the middle processor, the ultrasonic processor and the density processor are all provided with the counters.
Further, the synchronization pulser is arranged in the density nipple and used for sending a clock pulse signal with a fixed frequency f.
Furthermore, the synchronous pulse line is connected with the neutron short section, the ultrasonic ranging short section and the density short section in parallel.
Furthermore, the counters are of the same type and are hardware peripheral components of the central processor, the ultrasonic processor and the density processor, after the program firmware sets a pin of the processor, the pin is communicated with a counting unit in the processor, an external TTL pulse signal triggers the value of the counting unit to be increased, and one pulse is increased by one.
Specifically, the step S2 further includes the following steps:
s21: the synchronous pulser sends a clock pulse signal with fixed frequency f;
s22, the counting units in the middle processor, the ultrasonic processor and the density processor receive the pulse signals and trigger the value of the counting units to increase;
s23: and the neutron pup joint, the ultrasonic ranging pup joint and the density pup joint synchronously record the count value of each sampling point to a counter when data sampling is carried out.
Specifically, the accurate relative time of each sample and the sector where each sample point is located can be determined by the count value on the counter.
Furthermore, the density sub is also provided with an acceleration sensor for determining the position of the measuring surface, the sampling of the acceleration sensor is controlled by the clock interrupt of the processor, and the processor is interrupted by a firmware program.
By adopting the technical scheme, the data synchronization method for the neutron density instrument has the following beneficial effects:
1. the neutron pup joint, the ultrasonic distance measuring pup joint and the density pup joint can be ensured to be continuously carried out in the sampling process by the arrangement of the synchronous pulser, the response interruption of a processor is avoided, and the accurate relative time of each sampling can be known.
2. According to the data synchronization method for the neutron and density instrument, a synchronization pulse line is additionally arranged among the neutron short section, the ultrasonic distance measuring short section and the density short section, so that the situation that each short section needs to be provided with a tool measuring surface is avoided, the cost is saved, the measurement implementation is ensured, and the efficiency is improved.
3. The neutron and density meter data synchronization method provided by the invention has the advantages that the peripheral equipment of the counter avoids the participation of the processor during the transmission of the pulse signal, namely, the computing capacity of the processor is not consumed, and the running load of the processor is reduced.
4. According to the neutron and density meter data synchronization method, the sector where the data is located can be determined through sampling of the acceleration sensor on the density short section, and the accuracy of sector division of the data is guaranteed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of the assembly of a neutron and densitometer according to the present invention;
FIG. 2 is a schematic representation of the steps of the neutron and densitometer data synchronization method of the present invention.
Reference numerals are as follows: 1-a pressure-resistant pipe, 2-a neutron short section, 3-an ultrasonic ranging short section, 4-a density short section, 5-a synchronous pulse device, 6-a power line, 7-a communication line, 21-a neutron processor, 22-a storage, 31-an ultrasonic processor, 41-a density processor, 51-a synchronous pulse emitter and 52-a synchronous pulse line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Example 1
As shown in fig. 2, the invention provides a method for synchronizing data of a neutron density meter and a densitometer, which comprises the following steps:
s1: a synchronous pulser is arranged on the neutron and density instrument and used for sending a synchronous pulse signal;
s2: the synchronous pulse signal is transmitted to each short section of the neutron and densitometer through a synchronous pulse line;
s3: each short joint of the neutron and density instrument is provided with a counter for counting pulse signals and sampling signals;
s4: dividing the measurement data into eight sectors on the measurement surface of the tool according to the frequency and the rotating speed of the pulse signals, wherein each sector has an angle of 45 degrees;
s5: and determining the accurate time and the sector of each sample according to the counting calculation of the pulse signals and the sampling signals.
Further, the neutron and density meter comprises a neutron pup joint 2, an ultrasonic distance measuring pup joint 3 and a density pup joint 4, wherein the neutron pup joint comprises a neutron processor 21 which is used for measuring formation porosity data; the ultrasonic ranging nipple comprises an ultrasonic processor 31 for measuring the distance from the measuring instrument to the well wall; the density sub comprises a density processor 41 for measuring the formation density and photoelectric coefficient; the middle processor, the ultrasonic processor and the density processor are all provided with the counters.
Further, the synchronization pulser 51 is disposed in the density sub 4, and is configured to transmit a clock signal with a fixed frequency f.
Furthermore, the synchronous pulse line 52 is connected with the neutron short section 2, the ultrasonic ranging short section 3 and the density short section 4 in parallel.
Furthermore, the counters are of the same type and are hardware peripheral components of the central processor 21, the ultrasonic processor 31 and the density processor 41, after the program firmware sets a pin of the processor, the pin is communicated with a counting unit inside the processor, an external TTL pulse signal triggers the value of the counting unit to increase, and one pulse increases.
Specifically, the step S2 further includes the steps of:
s21: the synchronous pulser sends a clock pulse signal with fixed frequency f;
s22, the counting units in the middle processor 21, the ultrasonic processor 31 and the density processor 41 receive the pulse signals and trigger the value of the counting units to increase;
s23: and the neutron pup joint 2, the ultrasonic ranging pup joint 3 and the density pup joint 4 synchronously record the count value of each sampling point to a counter when data sampling is carried out.
According to the neutron and densitometer data synchronization method, the synchronization pulser 51 sends a clock pulse signal with a fixed frequency f, and the signal is simultaneously received by the processors of the neutron short section 2, the ultrasonic ranging short section 3 and the density short section 4 and recorded on the three counters, and the process does not consume the computing power of the processors. And adding one to each time when the counter receives a pulse signal, so that the counter values of the processors of the neutron short section 2, the ultrasonic ranging short section 3 and the density short section 4 are the same at any time. Like this neutron nipple joint 2, ultrasonic ranging nipple joint 3 and density nipple joint 4's counter all is synchronous increase, every nipple joint synchronous record every sampling point's count value when carrying out data sampling, through the accurate corresponding moment of every sampling can be confirmed to the count value. Therefore, the problem of response interruption is solved by only adding one synchronous pulse line, most of processing is background processing, and the cost is reduced.
Example 2
As shown in fig. 1, the neutron and density meter suitable for the invention comprises a compression resistant pipe 1, a neutron pup joint 2, an ultrasonic ranging pup joint 3, a density pup joint 4 and a synchronous pulse device 5, wherein the neutron pup joint 2, the ultrasonic ranging pup joint 3 and the density pup joint 4 are connected in sequence and are arranged inside the compression resistant pipe 1; the synchronous pulse device 5 is arranged inside the density short section; the neutron sub 2 comprises a neutron processor 21 for measuring formation porosity data; the ultrasonic ranging nipple 3 comprises an ultrasonic processor 31 and is used for measuring the distance from the measuring instrument to the well wall; the density short section 4 comprises a density processor 41 and an acceleration sensor 42, wherein the density processor 41 is used for measuring the formation density and photoelectric coefficient, and the acceleration sensor 42 is used for determining the position of a tool measuring surface and the position pointed by a measuring probe; the synchronization pulse device 5 comprises a synchronization pulse emitter 51 and a synchronization pulse line 52, the synchronization pulse emitter 51 is used for sending a synchronization clock signal with a fixed frequency f, and the synchronization pulse line 52 is used for transmitting a pulse signal to the central processor 21 and the ultrasonic processor. Neutron and densimeter still include power cord 6 and communication line 7, neutron nipple joint 2, ultrasonic ranging nipple joint 3 and density nipple joint 4 are parallelly connected on the power cord 6, neutron nipple joint 2, ultrasonic ranging nipple joint 3 and density nipple joint 4 are parallelly connected on the communication line 7. And the communication line 7 is used for information transmission among the neutron pup joint 2, the ultrasonic ranging pup joint 3 and the density pup joint 4. Neutron nipple 2 also includes storage 22, storage 22 is used for storing neutron nipple 2, ultrasonic ranging nipple 3 and the data that density nipple 4 measured. The density nipple 4 is also used for measuring well deviation and instrument rotating speed, and the density nipple 4 is communicated with other logging instruments through the power line 6. The central processor 21, the ultrasonic processor 31 and the density processor 41 are each provided with a counter for receiving the pulse signal and ensuring that the received pulse signal is increased synchronously. The counters are of the same type and are all hardware peripheral components of the central processor 21, the ultrasonic processor 31 and the density processor 41. The pressure-resistant pipe of the neutron and densimeter is made of stainless steel. A logging device comprises a logging instrument, wherein the logging instrument comprises the neutron and density instrument.
According to the neutron and density meter, the counters are of the same type and are hardware peripheral components of the neutron processor 21, the ultrasonic processor 31 and the density processor 41, after the program firmware sets the pins of the three processors, the pins are communicated with the counting unit inside the processors, the external TTL pulse signal triggers the value of the counting unit to increase, one pulse increases, and the process does not need the participation of the processors, in other words, the computing power of the processors is not consumed. The processor may read the count value of the count unit when needed. Therefore, if the processor does not have this function, the processor must immediately interrupt the code being executed to increment the counter and then return to the previously executed code upon receipt of the pulse, thereby increasing the processing load. Therefore, the peripheral counter can reduce the load of the processor, reduce the power consumption of the processor and reduce the program complexity of the processor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. A neutron and density meter data synchronization method is characterized by comprising the following steps:
s1: a synchronous pulser is arranged on the neutron and density instrument and used for sending a synchronous pulse signal;
s2: the synchronous pulse signals are transmitted to each short section of the neutron and density instrument through a synchronous pulse line;
s3: each short joint of the neutron and density instrument is provided with a counter for counting pulse signals and sampling signals;
s4: dividing the measurement data into eight sectors on a tool measurement surface according to the frequency and the rotating speed of the pulse signals, wherein each sector has an angle of 45 degrees;
s5: and determining the accurate time and the sector of each sample according to the counting calculation of the pulse signals and the sampling signals.
2. The method for data synchronization of a neutron and density instrument according to claim 1, wherein the neutron and density instrument comprises a neutron sub-section, an ultrasonic ranging sub-section and a density sub-section, the neutron sub-section comprises a neutron processor, the ultrasonic ranging sub-section comprises an ultrasonic processor, the density sub-section comprises a density processor, and the neutron processor, the ultrasonic processor and the density processor are all provided with the counter.
3. The method for synchronizing data of a neutron and density tool as recited in claim 2, wherein the synchronization pulser is disposed in the density sub and configured to transmit a clock signal of a fixed frequency f.
4. The method for synchronizing the data of the neutron density meter according to the claim 2, wherein the synchronous pulse line is connected with the neutron pup joint, the ultrasonic distance measuring pup joint and the density pup joint in parallel.
5. The method for synchronizing data of a neutron and density instrument according to claim 2, wherein the counter is of the same type and is a hardware peripheral component of the neutron processor, the ultrasonic processor and the density processor, after the program firmware sets the pins of the processors, the pins are communicated with the counting unit inside the processors, the external TTL pulse signal triggers the value of the counting unit to be increased, and one pulse is increased by one.
6. The method for synchronizing neutron and density instrumentation data of claim 4, wherein the step S2 further comprises the steps of:
s21: the synchronous pulser sends a clock pulse signal with fixed frequency f;
s22, the counting units in the middle processor, the ultrasonic processor and the density processor receive the pulse signal and trigger the value of the counting unit to increase;
s23: and the neutron short section, the ultrasonic ranging short section and the density short section synchronously record the count value of each sampling point to a counter when data sampling is carried out.
7. The method for synchronizing data of a neutron and density instrument according to claim 6, wherein the accurate time of each sampling and the sector where each sampling point is located can be determined by the count value on the counter.
8. The method for synchronizing data of a neutron and a density meter according to claim 2, wherein the density nipple is further provided with an acceleration sensor for determining the position of the measuring surface, the sampling of the acceleration sensor is controlled by a clock interrupt of the processor, and the processor is enabled to generate an interrupt through a firmware program.
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| CN201811295626.4A CN109488287B (en) | 2018-11-01 | 2018-11-01 | Neutron and densimeter data synchronization method |
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| DE10255685B3 (en) * | 2002-11-28 | 2004-07-29 | Infineon Technologies Ag | Clock synchronization circuit |
| CN103236845A (en) * | 2013-04-18 | 2013-08-07 | 西安石油大学 | Method for compacting data transmitted with drilling well mud pulse |
| CN103684358B (en) * | 2013-11-21 | 2016-12-07 | 航天科工深圳（集团）有限公司 | Sampling pulse generates method and apparatus |
| CN105604538B (en) * | 2014-11-03 | 2024-02-02 | 中国石油集团长城钻探工程有限公司 | Controllable neutron source compensation neutron logging instrument and control circuit thereof |
| CN207660601U (en) * | 2017-12-29 | 2018-07-27 | 长春市斯普瑞新技术有限责任公司 | A kind of well testing depth test system |
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