CN109798100A - Stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods - Google Patents
Stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods Download PDFInfo
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- CN109798100A CN109798100A CN201811586311.5A CN201811586311A CN109798100A CN 109798100 A CN109798100 A CN 109798100A CN 201811586311 A CN201811586311 A CN 201811586311A CN 109798100 A CN109798100 A CN 109798100A
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- stratum
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- lithology
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Abstract
The invention belongs to drilling engineering technical fields, judge recognition methods more particularly, to a kind of stratum based on nearly drill bit engineering parameter measurement-while-drilling, it is characterised in that include the following steps: that (1) carries out feature extraction；(2) data correlation is carried out；(3) field test geologic assessment is carried out；(4) measuring instrument accurately judges stratum by the engineering parameter that measurement obtains；(5) after the confirmation of stratum accurate information, its signal is sent to ground by the transmission mode of electromagnetic wave or mud-pulse, is analyzed and determined for ground staff.For the present invention under the premise of gamma tentatively judges stratum, the parameter obtained by device for subsurface measuring, Conjoint Analysis further accurately judges down-hole formation lithology, and data accuracy is higher, can make and accurately identify to increasingly complex stratum；Metrical information real-time Transmission can have preferable real-time compared with than previous debris logging method to Ground analysis decoding software by way of electromagnetic wave or mud-pulse.
Description
Technical field
The invention belongs to drilling engineering technical field, more particularly, to a kind of based on nearly drill bit engineering parameter measurement-while-drilling
Stratum judges recognition methods.
Background technique
The Various Complex existing for Process of Oil Well Drilling and uncertain factor, it is single for geological conditions, it is possible to encounter
Variation of lithological, strata pressure variation etc. factor, if the geological information currently crept into promptly and accurately cannot be obtained, just
The error in judgement that may cause field technicians influences construction speed, or even causes engineering accident.
Currently, the method that we obtain drilling geology information, greatly mostly from offset well well history data and well logging and well logging
Data prejudge new well geologic parameter, and obtain landwaste data in real time in drilling process, with adjacent well section well-log information
It compares.But since landwaste sampling receives the influence of property of drilling fluid, there may be biggish inclined for this judgment mode
Difference.Also, the landwaste that drilling fluid carries needs the long period that can just pass to ground, can not provide geologic change for ground staff
Real-time judge foundation.And the logging modes such as natural gamma, it is that stratum is distinguished by the radioactive substance in measurement different lithology
Lithology and ingredient, this method specific performance depend on the resolution capability of instrument, and to complicated and subtle formation variation, are difficult
It is timely identified, for the complex reservoir and thin layer reservoir that current drilling well is encountered, it is difficult to it is stringent to be applicable in scene
It is required that.
In addition, some investigators attempt to judge lithology by judging in drilling process catalase frequency, it is still, single
There is also large errors to judge lithology for the pure vibration signal generated by catalase, because when bit pressure or torque are different
When, the vibration signal during catalase may be produced bigger effect.
Summary of the invention
The object of the present invention is to provide a kind of stratum based on nearly drill bit engineering parameter measurement-while-drilling to judge recognition methods,
With boring in job engineering, drilling strata information is accurately judged, real-time instruction engineer operation solves current universal gamma survey
Possibly can not be made to complex formation the problem of accurately identifying.
The purpose of the present invention is what is realized by following technical proposals:
Stratum based on nearly drill bit engineering parameter measurement-while-drilling of the invention judges recognition methods, it is characterised in that including such as
Lower step:
(1) it carries out feature extraction: selecting a kind of lithology, by the catalase experimental provision of simulation, adjust different brills
Pressure, the application combination of torque, then measure the vibration values of the catalase in the combination stressed situation, and record storage arrives
In database；
(2) it carries out data correlation: the combination parameter of different bit pressures, torque and vibration values is corresponded into its corresponding lithology kind
Class establishes a large amount of corresponding relationship；
(3) field test geologic assessment is carried out: by lithology and bit pressure, torque corresponding relation database typing measuring instrument
In logic processing device, and instrument is connected to the nearly bit location of drill assembly, with piercing well work；
(4) measuring instrument of entire measuring system is in underground work, first by natural gamma sensor, to current
Stratum tentatively judged, subsequent measuring instrument accurately judges stratum by the engineering parameter that measurement obtains: by bit pressure,
In torque, vibratory output input processor, processor according in parameter query database with the presence or absence of corresponding lithology, and if it exists, then
Confirm current drilled strata lithology；If not checking in corresponding lithology in the database according to current measurement parameter, then note is stored
Record, ground staff can compare and analyze the landwaste returned out in its relationship and corresponding period casing, and by this group of engineering
Its corresponding landwaste information of parameter carries out corresponding and input database；
(5) after the confirmation of stratum accurate information, its signal is sent to ground by the transmission mode of electromagnetic wave or mud-pulse
Face is analyzed and determined for ground staff.
The measuring system includes the measuring instrument pipe nipple for being arranged in downhole assembly and being located at drill bit, with this
The wireless receiving instrument that measuring instrument pipe nipple is connected, the floor treatment analysis system being connected with this wireless receiving instrument,
The measuring instrument pipe nipple includes measurement nipple body, along the several of this measurement nipple body middle section circumference setting
Film trap sum number battery and processing circuit slot are strained, the foil gauge group in the strain film trap is set, is arranged in the battery
And processing circuit and gamma survey module in processing circuit slot.
Several strain film traps realize sealing, several batteries and processing circuit slot using foil gauge tank cover plate
Sealing is realized using battery and processing circuit tank cover plate.
Cable-through hole is equipped between each strain film trap and each battery and processing circuit slot, the company of being equipped in each cable-through hole
Connect the circuit of element in each strain film trap and each battery and processing circuit slot.
Advantages of the present invention:
(1) stratum of the invention based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, tentatively sentences in gamma
Under the premise of disconnected stratum, the parameters such as bit pressure, torque, axial vibration, oscillation crosswise for being obtained by device for subsurface measuring, joint point
Analysis further accurately judges down-hole formation lithology, and compared with than previous single judgment method, data accuracy is higher, can be to more
Complicated stratum, which is made, to be accurately identified；
(2) stratum of the invention based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, and metrical information can lead to
The mode real-time Transmission of electromagnetic wave or mud-pulse is crossed to Ground analysis decoding software, is had compared with than previous debris logging method
Preferable real-time；
(3) stratum of the invention based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, measuring instrument installation
In nearly bit location, reduce the distance of zero mark of instrument, improves the real-time that formation information obtains；
(4) stratum of the invention based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, can be basic herein
The upper more measurement parameters of introducing carry out joint judgement to stratum, further increase measurement accuracy.
Detailed description of the invention
Fig. 1 is overall plan flow chart of the invention.
Fig. 2 is the structural schematic diagram of measuring system of the present invention.
Fig. 3 is the structural schematic diagram of measuring instrument pipe nipple of the present invention.
Fig. 4 is the cross-sectional view of Fig. 3 of the present invention.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figs 1-4, the stratum of the invention based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, special
Sign is to include the following steps:
(1) it carries out feature extraction: selecting a kind of lithology, by the catalase experimental provision of simulation, adjust different brills
Pressure, the application combination of torque, then measure the vibration values of the catalase in the combination stressed situation, and record storage arrives
In database；
(2) it carries out data correlation: the combination parameter of different bit pressures, torque and vibration values is corresponded into its corresponding lithology kind
Class establishes a large amount of corresponding relationship；
(3) field test geologic assessment is carried out: by lithology and bit pressure, torque corresponding relation database typing measuring instrument
In logic processing device, and instrument is connected to 9 position of nearly drill bit of drill assembly, with piercing well work；
(4) measuring instrument of entire measuring system is in underground work, first by natural gamma sensor, to current
Stratum tentatively judged, subsequent measuring instrument accurately judges stratum by the engineering parameter that measurement obtains: by bit pressure,
In torque, vibratory output input processor, processor according in parameter query database with the presence or absence of corresponding lithology, and if it exists, then
Confirm current drilled strata lithology；If not checking in corresponding lithology in the database according to current measurement parameter, then note is stored
Record, ground staff can compare and analyze the landwaste returned out in its relationship and corresponding period casing, and by this group of engineering
Its corresponding landwaste information of parameter carries out corresponding and input database；
(5) after the confirmation of stratum accurate information, its signal is sent to ground by the transmission mode of electromagnetic wave or mud-pulse
Face is analyzed and determined for ground staff.
The measuring system includes the measuring instrument pipe nipple for being arranged in downhole assembly 12 and being located at drill bit 9
14, the wireless receiving instrument 11 being connected with this measuring instrument pipe nipple 14, at the ground being connected with this wireless receiving instrument 11
Analysis system 13 is managed,
The measuring instrument pipe nipple 14 includes measurement nipple body 8, along this measurement 8 middle section circumference of nipple body setting
Several strain film traps 6 and several batteries and processing circuit slot 7 are arranged in the strain film trap 6 foil gauge group, are arranged in institute
State the processing circuit 4 and gamma survey module 5 in battery and processing circuit slot 7.
Several strain film traps 6 realize sealing, several batteries and processing circuit using foil gauge tank cover plate 1
Slot 7 realizes sealing using battery and processing circuit tank cover plate 3.
It is equipped with cable-through hole 2 between each strain film trap 6 and each battery and processing circuit slot 7, is set in each cable-through hole 2
There is the circuit for connecting element in each strain film trap 6 and each battery and processing circuit slot 7.
Embodiment
Indoor test is carried out on ground first, selects a kind of rock x1, it is solid first using simulation rock crushing test device
Surely applying torque value is A, adjusts different bit pressures, and when bit pressure value is " one ", record vibratory output is " 1 ", then by above data
Record corresponding relationship library, can then know: when torque is A, bit pressure is " one ", and when vibrating for " 1 ", the rock stratum bored is x1；It does
After complete group test, even twisting moment value A is constant, continues to change multiple groups bit pressure value, while recording its vibratory output accordingly generated, in
It is the corresponding relationship for just obtaining multiple groups integration engineering parameter Yu lithology x1；Continuing thereafter with even twisting moment value is that B is constant, with same
Mode continues to be recorded in torque value when being B, difference vibratory output caused by different bit pressure values, and carries out corresponding storage with lithology x1.
In the same way, continue to carry out experimental test to rock x2, and it is corresponding with corresponding engineering parameter
Relationship storage.
And so on, continue rock x3, x4, x5 etc. series of tests ...
As shown in table 1,
Table 1: engineering parameter and lithology corresponding relation database
After carrying out a large amount of ground test and data record, all Lithology Discrimination features of basic confirmation then will
In the processing circuit 4 of Input of Data measuring instrument, measurement nipple body 8 circumferentially multiple strain film traps 6, the brill of underground
Pressure and torque are measured by the foil gauge pasted in strain film trap 6, foil gauge tank cover plate 1 and battery and processing circuit slot cover
Plate 3 is used to guarantee the sealing reliability of foil gauge, processing circuit and battery.After instrument testing, preparation of going into the well is carried out.
Measuring instrument ontology 8 is gone into the well work, and progress stratum first tentatively judges: gamma survey module 5 is to current formation
Radioactive element is acquired measurement, determines preliminary formation information.It then carries out formation lithology accurately to judge: measuring instrument ontology
8 by the foil gauge pasted in strain film trap 6 and the vibrating sensor being built in processing circuit 4, to the brill of current working
Pressure, torque and vibration values are acquired, and are carried it into and carried out data correlation in the database in processing circuit 4, its phase is inquired
The lithology answered after being successfully associated, i.e., accurately judges current formation lithology.Its information is passed by way of radio magnetic wave later
Wireless receiving instrument 11 is transported to, the purpose of this step is mainly the desire to for measuring instrument to be placed closest to the position of drill bit, and
Information is transmitted across screw rod 10, reduces measuring instrument distance of zero mark.
Formation information can be uploaded to ground by way of pulse transmission or electromagnetic wave by last wireless receiving instrument 11
Surface treatment analysis system 13；If not inquiring its corresponding lithology, then by its parameter after bringing engineering parameter combination into database
Combination is stored and is uploaded a unknown lithology signal, and surface personnel can be according to the landwaste pair returned out in later period annular space
The corresponding lithology of its parameter combination judged, and after instrument goes out well, by its input database.
It is obtained with driller's journey parameter information by being installed on the measuring instrument at nearly 9 position of drill bit, and passes through electromagnetism
The mode of wave or mud-pulse is by real-time data transmission to ground decoding device, eventually by Ground analysis software to shaft bottom geology
Information carries out accurate judgement.
Stratum based on nearly drill bit engineering parameter measurement-while-drilling of the invention judges recognition methods, tentatively judges ground in gamma
Under the premise of layer, the parameters such as bit pressure, torque, axial vibration, oscillation crosswise obtained by device for subsurface measuring, Conjoint Analysis into
One step accurately judges down-hole formation lithology, and compared with than previous single judgment method, data accuracy is higher, can be to increasingly complex
Stratum make and accurately identifying；Metrical information real-time Transmission to Ground analysis can be decoded by way of electromagnetic wave or mud-pulse
Software has preferable real-time compared with than previous debris logging method；Measuring instrument of the present invention is mounted on nearly 9 position of drill bit,
Reduce the distance of zero mark of instrument, improves the real-time that formation information obtains；It is of the invention based on nearly drill bit engineering parameter measurement-while-drilling
Stratum judge recognition methods, more measurement parameters can be introduced on this basis, joint judgement is carried out to stratum, further mentioned
High measurement accuracy.
Claims (4)
1. a kind of stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, it is characterised in that including walking as follows
It is rapid:
(1) it carries out feature extraction: selecting a kind of lithology, by the catalase experimental provision of simulation, adjust different bit pressures, turn round
The application combination of square, then measures the vibration values of the catalase in the combination stressed situation, and record storage is to data
In library；
(2) it carries out data correlation: the combination parameter of different bit pressures, torque and vibration values is corresponded into its corresponding lithology type,
Establish a large amount of corresponding relationship；
(3) field test geologic assessment is carried out: by the logic of lithology and bit pressure, torque corresponding relation database typing measuring instrument
In processing unit, and instrument is connected to the nearly bit location of drill assembly, with piercing well work；
(4) measuring instrument of entire measuring system is in underground work, first by natural gamma sensor, to current formation
Tentatively judged, subsequent measuring instrument accurately judges stratum by the engineering parameter that measurement obtains: by bit pressure, being turned round
In square, vibratory output input processor, processor according in parameter query database with the presence or absence of corresponding lithology, and if it exists, then really
Recognize current drilled strata lithology；If not checking in corresponding lithology in the database according to current measurement parameter, then note is stored
Record, ground staff can compare and analyze the landwaste returned out in its relationship and corresponding period casing, and by this group of engineering
Its corresponding landwaste information of parameter carries out corresponding and input database；
(5) after the confirmation of stratum accurate information, its signal is sent to ground by the transmission mode of electromagnetic wave or mud-pulse, is supplied
Ground staff analyzes and determines.
2. the stratum according to claim 1 based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, feature
It is that the measuring system includes the measuring instrument pipe nipple for being arranged in downhole assembly and being located at drill bit, with this measurement
The wireless receiving instrument that instrument pipe nipple is connected, the floor treatment analysis system being connected with this wireless receiving instrument,
The measuring instrument pipe nipple includes measurement nipple body, along several strains of this measurement nipple body middle section circumference setting
Film trap and several batteries and processing circuit slot are arranged in the foil gauge group in the strain film trap, are arranged at the battery and place
Manage the processing circuit and gamma survey module in circuit slot.
3. the stratum according to claim 2 based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, feature
It is that several strain film traps realize sealing using foil gauge tank cover plate, several batteries and processing circuit slot use
Battery and processing circuit tank cover plate realize sealing.
4. the stratum according to claim 2 based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods, feature
It is to be equipped with cable-through hole between each strain film trap and each battery and processing circuit slot, it is every that connection is equipped in each cable-through hole
The circuit of element in a strain film trap and each battery and processing circuit slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811586311.5A CN109798100A (en) | 2018-12-25 | 2018-12-25 | Stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods |
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| CN201811586311.5A CN109798100A (en) | 2018-12-25 | 2018-12-25 | Stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318728A (en) * | 2019-08-01 | 2019-10-11 | 中国地质大学（北京） | A kind of nearly drill bit multiple-project parameter measurement while drilling storage device |
| CN111577268A (en) * | 2020-05-25 | 2020-08-25 | 中国地质大学（北京） | Method for judging rock lithology by using drilling tool vibration parameters |
| CN112144594A (en) * | 2020-08-10 | 2020-12-29 | 中交第二航务工程局有限公司 | Construction stratum identification method of slot milling machine based on TPOT |
| CN112855113A (en) * | 2021-01-28 | 2021-05-28 | 北京三一智造科技有限公司 | Automatic drilling method and controller of rotary drilling rig, storage medium and electronic equipment |
| CN113279691A (en) * | 2021-07-02 | 2021-08-20 | 中国石油大学(北京) | Intelligent hydraulic pulse jet flow vibration drilling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004086093A1 (en) * | 2003-03-20 | 2004-10-07 | Baker Hughes Incorporated | Use of pattern recognition in a measurement of formation transit time for seismic checkshots |
| CN101936159A (en) * | 2010-08-30 | 2011-01-05 | 中国石油集团钻井工程技术研究院 | Method for recognizing lithological characters while drilling |
| CN103046868A (en) * | 2012-12-28 | 2013-04-17 | 中国石油集团川庆钻探工程有限公司 | Integrated horizontal well geosteering method |
| CN106555586A (en) * | 2015-09-24 | 2017-04-05 | 中石化石油工程技术服务有限公司 | One kind is with the continuous GR logging of brill and its logging method |
| CN107313768A (en) * | 2017-07-07 | 2017-11-03 | 贝兹维仪器(苏州)有限公司 | A kind of nearly bit measuring instrument with gamma survey function |
-
2018
- 2018-12-25 CN CN201811586311.5A patent/CN109798100A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004086093A1 (en) * | 2003-03-20 | 2004-10-07 | Baker Hughes Incorporated | Use of pattern recognition in a measurement of formation transit time for seismic checkshots |
| CN101936159A (en) * | 2010-08-30 | 2011-01-05 | 中国石油集团钻井工程技术研究院 | Method for recognizing lithological characters while drilling |
| CN103046868A (en) * | 2012-12-28 | 2013-04-17 | 中国石油集团川庆钻探工程有限公司 | Integrated horizontal well geosteering method |
| CN106555586A (en) * | 2015-09-24 | 2017-04-05 | 中石化石油工程技术服务有限公司 | One kind is with the continuous GR logging of brill and its logging method |
| CN107313768A (en) * | 2017-07-07 | 2017-11-03 | 贝兹维仪器(苏州)有限公司 | A kind of nearly bit measuring instrument with gamma survey function |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318728A (en) * | 2019-08-01 | 2019-10-11 | 中国地质大学（北京） | A kind of nearly drill bit multiple-project parameter measurement while drilling storage device |
| CN111577268A (en) * | 2020-05-25 | 2020-08-25 | 中国地质大学（北京） | Method for judging rock lithology by using drilling tool vibration parameters |
| CN112144594A (en) * | 2020-08-10 | 2020-12-29 | 中交第二航务工程局有限公司 | Construction stratum identification method of slot milling machine based on TPOT |
| CN112855113A (en) * | 2021-01-28 | 2021-05-28 | 北京三一智造科技有限公司 | Automatic drilling method and controller of rotary drilling rig, storage medium and electronic equipment |
| CN113279691A (en) * | 2021-07-02 | 2021-08-20 | 中国石油大学(北京) | Intelligent hydraulic pulse jet flow vibration drilling device |
| CN113279691B (en) * | 2021-07-02 | 2022-03-22 | 中国石油大学(北京) | Intelligent hydraulic pulse jet flow vibration drilling device |
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Effective date of registration: 20200929 Address after: 100120 Beijing Xicheng District six laying Kang Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC GREATWALL DRILLING Co. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Applicant before: CNPC GREATWALL DRILLING Co. |
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