CN108166971B - A kind of Multifunctional inclination measuring apparatus and the method based on inclinometer progress offset well casing relative position judgement - Google Patents
A kind of Multifunctional inclination measuring apparatus and the method based on inclinometer progress offset well casing relative position judgement Download PDFInfo
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention discloses a kind of Multifunctional inclination measuring apparatus and the methods for carrying out the judgement of offset well casing relative position based on the inclinometer, belong to the dedicated inclinometer design of oil drilling and wellbore anti-collision technical field.Fluxgate sensor is integrated into existing gyrolevel by the Multifunctional inclination measuring apparatus for the first time；It mainly include that the quick identification step of risk and offset well casing relative position inversion step are touched in the magnetic disturbance of offset well casing and wellbore friendship based on the method that the inclinometer carries out the judgement of offset well casing relative position.The present invention gives magnetic tool face azimuth, the magnetic field strength of fluxgate sensor actual measurement and the practical approach of magnetic field inclination angle inverting offset well casing relative distance and orientation provided using gyrosensor for the first time, offset well casing magnetic disturbance well section can solve simultaneously well track accurately measure, wellbore friendship touch the problems such as risk identification, the relative position inverting of offset well casing, it does not need additionally to increase detecting devices, whether do not gone into operation by offset well or halt production is limited, additionally aided discovery wellbore friendship early and touch risk.
Description
Technical field
The present invention relates to petroleum drilling engineering field more particularly to the dedicated inclinometer designs of oil drilling and wellbore anti-collision skill
Art concretely relates to a kind of while having magnetic and inertial measurement component Multifunctional inclination measuring apparatus, and is based on more function
The method that energy inclinometer carries out the judgement of offset well casing relative position.
Background technique
Field of oil drilling generallys use magnetic inclinometer measurement well track parameter (drift azimuth AZI) and deflecting work
Have attitude parameter (magnetic tool face azimuth MTF)；Magnetic inclinometer is measurement medium, magnetic as measuring cell, with earth's magnetic field using fluxgate
On the basis of northern bit line, it could be worked normally only in normally magnetic field environment.Currently, it is more next newly to bore Encryption Well, adjustment well
More, newly-built collecting well group scale is increasing, and the space length of well and well is smaller and smaller, and current borehole is too close to offset well set
Tubing string is likely to result in two serious consequences: (1) offset well casing string generates magnetic disturbance to the magnetic inclinometer in current borehole, leads
Measurement accuracy is caused to reduce even distortion completely, it has to use costly gyrolevel instead；(2) current borehole, which bores, meets (very
To drilling) wellbore of offset well casing hands over the accident of touching to happen occasionally, and not only Important Economic is brought to lose, also brings considerable safety hidden
Suffer from.Gyrolevel belongs to inertia measurement instrument using gyrosensor as measuring cell, is not influenced by offset well casing magnetic disturbance,
But gyrolevel structure is more complex, price is higher, most of gyrolevel can't use wireless drilling measurement method,
It can not show a candle to magnetic inclinometer in the popularity of situ of drilling well.
Offset well casing magnetic disturbance well section is also that the higher well section of risk is touched in wellbore friendship.In offset well casing magnetic disturbance well section gyro
Inclinometer can accurately measure drift azimuth and magnetic tool face azimuth, but all inclinometers have measurement error, work as measurement
Accumulative measurement error is also larger when well depth is larger, and the measurement result for relying solely on gyrolevel is difficult to that offset well casing is accurately positioned
Relative position, it is difficult to implement anti-collision early warning and anti-collision in high quality around barrier operation.In this case if used with fluxgate as survey
The magnetic inclinometer of element is measured, it is magnetic although magnetic inclinometer cannot accurately measure drift azimuth and magnetic tool face azimuth
Inclinometer can accurately measure magnetic field parameter, and the relative position of offset well casing can be estimated using the magnetic field parameter of actual measurement, is
Anti-collision early warning and anti-collision are around barrier operation offer guidance.It is not difficult to find that being surveyed in offset well casing magnetic disturbance well section if gyro is used alone
Oblique instrument is then difficult to carry out anti-collision early warning operation；If magnetic inclinometer is used alone, it is difficult to accurately measure and control wellbore rail
Mark.
Summary of the invention
In view of the above technical problems, the present invention provides a kind of while having magnetic and inertial measurement component multi-functional deviational survey
Instrument, and the method for carrying out the judgement of offset well casing relative position based on the inclinometer, this method can be in offset well casing magnetic disturbance
Well section solves the problems, such as that well track accurately measures and anti-collision early warning simultaneously.
The adopted technical solution is that:
Multifunctional inclination measuring apparatus a kind of while that there is magnetism and inertial measurement component, including measuring head, it is suitable in measuring head
Sequence is integrated with x-axis fluxgate sensor, y-axis fluxgate sensor, z-axis fluxgate sensor, x-axis accelerometer, y-axis acceleration
Meter, z-axis accelerometer, xy axis gyrosensor and z-axis gyrosensor；The x-axis fluxgate sensor, y-axis fluxgate pass
Sensor, z-axis fluxgate sensor and x-axis accelerometer, y-axis accelerometer, z-axis accelerometer correspond.
The method for carrying out the judgement of offset well casing relative position based on above-mentioned Multifunctional inclination measuring apparatus, comprising the following steps:
A offset well casing magnetic disturbance and wellbore friendship are touched risk and are quickly identified
(1) bored borehole is treated using existing directed drilling software before boring and does anti-collision scan, utilizes minimum distance and wellbore point
Identify that the higher well section of risk is touched in wellbore friendship from coefficient；
(2) the higher well section of risk is touched in wellbore friendship, is often drilled 1 drill pipe joint and carries out 1 full measurement, records wellbore rail
Mark parameter, magnetic field parameter；
(3) be transformed into presto tool surface model, locking turntable slowly above mentions or transfers drill string, to the well section newly drilled out by
1.0m/ point intensive measurement magnetic tool face azimuth, record measurement well depth, magnetic tool face azimuth, and two magnetic tool face azimuths are drawn out with survey
Measure well depth change curve；
(4) on the basis of the corresponding magnetic tool face azimuth of gyrosensor, if the corresponding magnetic tool face azimuth of fluxgate sensor
Deviation is smaller, shows that no offset well casing magnetic disturbance, that risk is touched in wellbore friendship is lower, can continue to creep into and repeat aforesaid operations；
If the corresponding magnetic tool face azimuth deviation of fluxgate sensor is larger, show that there are the magnetic disturbances of offset well casing and wellbore friendship to touch risk,
And deviation maximum is usually offset well casing collar location, requires transformation into offset well casing string relative position inversion step at this time；
B offset well casing relative position inverting
(1) different wells are recorded by full measurement pattern 2m/ point intensive measurement to the offset well casing magnetic disturbance well section identified
Deep corresponding well track parameter, magnetic field parameter；
(2) magnetic of hole angle, azimuth, magnetic tool face azimuth and the fluxgate sensor actual measurement provided using inclinometer
Field intensity, magnetic field inclination angle calculate the corresponding relevant parameter in interference magnetic field；Actual measurement magnetic field strength is resolved into along three reference axis
Bx、By、Bz；Normal magnetic field intensity is resolved into B along three reference axisx0、By0、Bz0；If interference magnetic field strength is Δ B, right therewith
Three components answered are Δ Bx、ΔBy、ΔBz, relevant calculation formula is as follows:
(3) joined along casing string lateral distance variation relation using interference magnetic field according to the interference magnetic field strength being previously obtained
Number can finally solve offset well casing relative distance r, relative bearing θ, see formula (3) and formula (4):
R=f (Δ B) (3)
The method have the benefit that:
(1) be put forward for the first time and fluxgate sensor be integrated into existing gyrolevel, give and meanwhile have it is magnetic and
The novel inclinometer of inertial measurement component designs and application method, can solve wellbore rail simultaneously in offset well casing magnetic disturbance well section
Mark accurately measures, the problems such as risk identification, the relative position inverting of offset well casing are touched in wellbore friendship.
(2) present invention identifies that risk is touched in wellbore friendship and inverting offset well casing is opposite by detection offset well casing self-field
Whether position does not need additionally to increase detecting devices, is not gone into operation by offset well or halt production is limited.
(3) basic function and operating method of the novel inclinometer provided based on the present invention, is given utilize magnetic flux for the first time
Two magnetic tool face azimuths that door sensor and gyrosensor provide quickly identify the practical operating method of offset well casing magnetic disturbance,
The time is saved than full measurement pattern intensive measurement method, discovery wellbore friendship early is additionally aided and touches risk.
(4) base of the novel inclinometer provided based on casing string self-field Study on regularity achievement and the present invention
This function and operating method give the magnetic tool face azimuth provided using gyrosensor for the first time, fluxgate sensor is surveyed
The practical approach of magnetic field strength and magnetic field inclination angle inverting offset well casing relative distance and orientation.
Detailed description of the invention
Fig. 1 is the measurement sensor arrangement schematic diagram of magnetic inclinometer；
Fig. 2 is the sensor layout schematic diagram of gyrolevel；
Fig. 3 is the sensor layout schematic diagram of the novel and multifunctional inclinometer of the present invention；
It is the vertical pipes column surrounding magnetic field regularity of distribution (vertical cross section) when N/S or S/N is combined that Fig. 4, which shows remanent magnetism,；
Fig. 5 is that the corresponding flow chart of risk method for quickly identifying is touched in the magnetic disturbance of offset well casing and wellbore friendship；
It is to interfere Distribution of Magnetic Field regular (vertical section when N/S or S/N is combined around vertical pipes column that Fig. 6, which shows remanent magnetism,
Figure)；
Fig. 7 is the corresponding flow chart of offset well casing relative position inversion method.
Specific embodiment
Basic structure and working principle based on magnetic inclinometer (as shown in Figure 1), gyrolevel (as shown in Figure 2),
And casing string self-field Study on regularity achievement, The present invention gives integrate fluxgate sensor and gyrosensor
To Multifunctional inclination measuring apparatus together, and the method that the judgement of offset well casing relative position is carried out based on the inclinometer, in offset well set
Pipe magnetic disturbance well section can solve the problems, such as that well track accurately measures and anti-collision early warning simultaneously.
As shown in figure 3, a kind of have magnetic and inertial measurement component Multifunctional inclination measuring apparatus, including measuring head, In simultaneously
X-axis fluxgate sensor, y-axis fluxgate sensor, z-axis fluxgate sensor, x-axis acceleration are sequentially integrated in measuring head
Meter, y-axis accelerometer, z-axis accelerometer, xy axis gyrosensor and z-axis gyrosensor.The x-axis fluxgate sensor,
Y-axis fluxgate sensor, z-axis fluxgate sensor and x-axis accelerometer, y-axis accelerometer, z-axis accelerometer correspond,
I.e. x-axis fluxgate sensor and x-axis accelerometer are arranged in the same plane, y-axis fluxgate sensor and y-axis accelerometer cloth
It sets in the same plane, z-axis fluxgate sensor and z-axis accelerometer are arranged in the same plane.
Magnetic inclinometer basic structure is as shown in Figure 1, measuring cell mainly includes 3 single-axis accelerometer (gx、gy、gz)、
3 uniaxial fluxgate (Bx、By、Bz), it is strong that hole angle, magnetic azimuth, gravity toolface angle, magnetic tool face azimuth, magnetic field can be provided
Degree, magnetic field inclination angle；Wherein, magnetic azimuth, magnetic tool face azimuth are on the basis of magnetic north.Gyrolevel basic structure such as Fig. 2
Shown, core component is inertial measurement cluster, generally includes 3 single-axis accelerometer (Bx、By、Bz), 2 twin shaft rate gyroscopes
(ωx、ωy), it is possible to provide true azimuth, hole angle, flash tool face azimuth, magnetic tool face azimuth；Wherein, true azimuth, magnetic tool-face
Angle is on the basis of geographical north (geographic north).
Compared with magnetic inclinometer, gyrolevel structure is more complex.The novel and multifunctional inclinometer structure design of the present invention
Fluxgate sensor should be integrated into gyrolevel (see Fig. 3) based on gyrolevel, 3 newly increased single shaft
Fluxgate (Bx、By、Bz) and original 3 single-axis accelerometer (Gx、Gy、Gz) correspond.Moreover, according to frame-type
Gyroscope or fibre optic gyroscope, fluxgate sensor can be close to gyroscopes；According to dynamic mode gyroscope, fluxgate sensor
Suitable distance should be kept with gyroscope, dynamic mode gyroscope is avoided to generate magnetic disturbance to fluxgate.
In addition, gyrolevel can be divided into wired drilling gyrolevel and wireless drilling gyro by the transmission mode of signal
Instrument.The advantages of wire transmission mode is that data transmission and renewal speed are fast, the i.e. renewable one-shot measurement data of about 3-5s, the disadvantage is that
Folding and unfolding cable is needed when connecing column, and it is more to occupy the drilling machine activity duration.The advantages of wireless transmission method is not need folding and unfolding cable,
It is less to occupy the drilling machine activity duration；The disadvantage is that data transmission and renewal speed are slow, full measurement pattern about 3min/ times.In order to save
Underground data measuring and uplink time, also for the working time for extending down-hole battery group, wireless transmission method usually has multiple
Operating mode meets different drilling condition requirements.For example, using presto tool surface model when directional drilling, about 3s is i.e. renewable
Tool face data；Full measurement pattern is used when measuring well track parameter, can measure and upload well track parameter (well
Oblique angle, azimuth) and magnetic field parameter (magnetic field strength, magnetic field inclination angle).
In terms of matched electronic circuit and data processing software, above-mentioned novel and multifunctional inclinometer is in addition to gyrolevel
Originally the measurement data provided, it is also necessary to increase fluxgate data acquisition and procession function.According to wired gyrolevel, need
Increasing magnetic tool face azimuth, (note: the magnetic tool face azimuth that fluxgate sensor provides is needed to carry out magnetic declination and is repaired on the basis of magnetic north
Just), magnetic field strength and magnetic field inclination angle；According to wireless gyrolevel, presto tool surface model needs to increase magnetic tool face azimuth,
Full measurement pattern needs to increase magnetic field strength and magnetic field inclination angle.Comprehensively utilizing above-mentioned measurement data can recognize that offset well casing magnetic
Risk is touched in interference and wellbore friendship, and high efficiency implements anti-collision around barrier operation.
The method for carrying out the judgement of offset well casing relative position based on above-mentioned Multifunctional inclination measuring apparatus, comprising the following steps:
1. Risk Identification Method is touched in the magnetic disturbance of offset well casing and wellbore friendship
Ferromagnetism casing string generates induced magnetic field in earth's magnetic field, also generates during detection, transport and underground are on active service
Remanent magnetism.The understanding casing string surrounding magnetic field regularity of distribution is to identify the basis of offset well casing magnetic disturbance.It is single with a batch of casing
Remanence direction substantially having the same, remanent magnetism magnetic pole is mainly that (top is that the pole N/lower part is S for N/S combination at casing coupling connection
Pole) or S/N combination (top is that the pole S/lower part is the pole N), Distribution of Magnetic Field rule is essentially identical (see Fig. 4) in the case of two kinds, only covers
The Magnetic Abnormal Area of east and west sides is slightly larger (close to 1.0m) at pipe box cupling, remaining position Magnetic Abnormal Area is smaller (about within 0.5m).
Since straight well section wellbore spacing variation in collecting well group top is slower, can be identified in time using above-mentioned novel and multifunctional inclinometer
Risk is touched in the magnetic disturbance of offset well casing and wellbore friendship.
This method main thought be pass through comparison and meanwhile measure two magnetic tool face azimuths (note: fluxgate sensor to
Magnetic tool face azimuth out needs magnetic declination to correct) identify offset well casing magnetic disturbance, and then identify that risk is touched in wellbore friendship.Specifically
For, if without offset well casing magnetic disturbance, magnetic tool that two sensors (fluxgate sensor and gyrosensor) provide
Face angle should be almost the same；If there is offset well casing magnetic disturbance, the measurement result of fluxgate sensor can be distorted, two groups of sensings
The magnetic tool face azimuth that device provides will appear larger difference, and difference is bigger to illustrate that offset well casing magnetic disturbance is more serious, and wind is touched in wellbore friendship
Danger is higher.
In view of casing string self-field coverage smaller (normally about within 1.0m), measurement sensor apart from drill bit compared with
Far (normally about 15m) needs to encrypt using presto tool surface model in order not to miss (or even early discovery) offset well casing magnetic disturbance
Magnetic tool face azimuth is measured, in order to estimate offset well casing relative distance and orientation, needs to utilize full measurement pattern intensive measurement magnetic field
Intensity and magnetic field inclination angle.Related data measurement and processing step are following (see Fig. 5):
(1) bored borehole, which is treated, using existing directed drilling software (for example, COMPASS software) before boring does anti-collision scan, benefit
Identify that the higher well section of risk is touched in wellbore friendship with minimum distance and wellbore separation.For the well section of cluster well top,
If the minimum distance of certain well section is less than 2.0m or wellbore separation less than 1.5, it is higher to can be considered that risk is touched in wellbore friendship.
(2) the higher well section of risk is touched in wellbore friendship, is often drilled 1 drill pipe joint and carries out 1 full measurement, records wellbore rail
Mark parameter (well depth, hole angle, azimuth), magnetic field parameter (total magnetic intensity, magnetic field inclination angle).
(3) it is transformed into presto tool surface model, locking turntable slowly above mentions (or decentralization) drill string, to the about 10- newly drilled out
15m well section by 1.0m/ point intensive measurement magnetic tool face azimuth (there are two), record measurement well depth, magnetic tool face azimuth and draw out two
A magnetic tool face azimuth is with measurement well depth change curve.
(4) on the basis of the corresponding magnetic tool face azimuth of gyrosensor, if the corresponding magnetic tool face azimuth of fluxgate sensor
Deviation is smaller, shows that no offset well casing magnetic disturbance, that risk is touched in wellbore friendship is lower, can continue to creep into and repeat aforesaid operations；
If the corresponding magnetic tool face azimuth deviation of fluxgate sensor is larger, show that there are the magnetic disturbances of offset well casing and wellbore friendship to touch risk,
And deviation maximum is usually offset well casing collar location, requires transformation into offset well casing string relative position inverting link.
Compared with full measurement pattern intensive measurement method, presto tool surface model can obtain enough within a short period of time
Magnetic field parameter, time of measuring can be saved.In addition, casing joint length about 10-12m, the continuous 15m that measures can be measured that two
A casing coupling helps to find that risk is touched in the magnetic disturbance of offset well casing and wellbore friendship as early as possible.
2. offset well casing relative position inversion method
Casing string surrounding magnetic field forms (see Fig. 4) by normal earth's magnetic field and interference magnetic field superposition, after rejecting normal earth's magnetic field
It was found that interference Distribution of Magnetic Field basically about casing string axis for axis symmetry distribution (only North and South direction varies slightly at casing coupling,
See Fig. 6), go out to interfere magnetic along casing string lateral distance variation relation or pre-production as long as returning out interference magnetic field strength in advance
Field intensity changes plate along casing string lateral distance, it will be able to using interference characteristics of geomagnetic field distribution be finally inversed by offset well casing it is opposite away from
From and orientation.Specific step is as follows (see Fig. 7):
(1) different wells are recorded by full measurement pattern 2m/ point intensive measurement to the offset well casing magnetic disturbance well section identified
Deep corresponding well track parameter (hole angle, azimuth), magnetic field parameter (total magnetic intensity, magnetic field inclination angle).
(2) magnetic of hole angle, azimuth, magnetic tool face azimuth and the fluxgate sensor actual measurement provided using inclinometer
Field intensity, magnetic field inclination angle calculate the corresponding relevant parameter in interference magnetic field.Actual measurement magnetic field strength is resolved into along three reference axis
Bx、By、Bz；Normal magnetic field intensity is resolved into B along three reference axisx0、By0、Bz0；If interference magnetic field strength is Δ B, right therewith
Three components answered are Δ Bx、ΔBy、ΔBz, relevant calculation formula is as follows:
(3) interference magnetic field is utilized along casing string lateral distance variation relation according to the interference magnetic field strength returned out in advance
Parameter can finally solve offset well casing relative distance r, relative bearing θ, see formula (3) and formula (4):
R=f (Δ B) (3)
In offset well casing magnetic disturbance well section, magnetic inclinometer cannot accurately measure magnetic azimuth and magnetic tool face azimuth, existing
Method is insincere, insecure come inverting offset well casing relative position using the measurement result of magnetic inclinometer.This method benefit
The true azimuth measured with gyrolevel and magnetic tool face azimuth inverting offset well casing relative position are accurate, reliable.
In summary, the method for carrying out the judgement of offset well casing relative position the present invention is based on Multifunctional inclination measuring apparatus presses following step
It is rapid to carry out:
After touching the higher well section of risk into wellbore friendship, as shown in Fig. 5 flow chart, provided using the present invention novel more
Function inclinometer, to newly drill out about 15m well section intensive measurement magnetic tool face azimuth (gyrosensor and fluxgate sensor respectively to
A magnetic tool face azimuth out), magnetic tool face azimuth is drawn with well depth change curve, is using the magnetic tool face azimuth of fluxgate sensor
It is no to have significant change to identify that risk is touched in the magnetic disturbance of offset well casing and wellbore friendship.
Identify that the magnetic disturbance of offset well casing and wellbore friendship are touched after risk, as shown in Fig. 7 flow chart, by the side of giving of the invention
Method encrypts deviational survey, the magnetic tool face azimuth provided using gyrosensor, fluxgate to the offset well casing magnetic disturbance well section identified
The magnetic field strength and magnetic field inclination angle inverting offset well casing relative distance and orientation of sensor actual measurement.
Claims (1)
1. the method that Multifunctional inclination measuring apparatus carries out the judgement of offset well casing relative position, which is characterized in that have simultaneously including one kind
Magnetic and inertial measurement component Multifunctional inclination measuring apparatus, Multifunctional inclination measuring apparatus includes measuring head, and x is sequentially integrated in measuring head
Axis fluxgate sensor, y-axis fluxgate sensor, z-axis fluxgate sensor, x-axis accelerometer, y-axis accelerometer, z-axis add
Speedometer, xy axis gyrosensor and z-axis gyrosensor；The x-axis fluxgate sensor, y-axis fluxgate sensor, z-axis
Fluxgate sensor and x-axis accelerometer, y-axis accelerometer, z-axis accelerometer correspond；
Method the following steps are included:
A offset well casing magnetic disturbance and wellbore friendship are touched risk and are quickly identified
(1) bored borehole is treated using existing directed drilling software before boring and does anti-collision scan, utilizes minimum distance and wellbore segregative line
Number identifies that the higher well section of risk is touched in wellbore friendship；
(2) the higher well section of risk is touched in wellbore friendship, is often drilled 1 drill pipe joint and carries out 1 full measurement, record well track ginseng
Number, magnetic field parameter；
(3) it is transformed into presto tool surface model, locking turntable slowly above mentions or transfer drill string, to the well section newly drilled out by 1.0m/
Point intensive measurement magnetic tool face azimuth, record measurement well depth, magnetic tool face azimuth, and two magnetic tool face azimuths are drawn out with measurement well depth
Change curve；
(4) on the basis of the corresponding magnetic tool face azimuth of gyrosensor, if the corresponding magnetic tool face azimuth deviation of fluxgate sensor
It is smaller, show that no offset well casing magnetic disturbance, that risk is touched in wellbore friendship is lower, can continue to creep into and repeat aforesaid operations；If magnetic
The corresponding magnetic tool face azimuth deviation of open gate sensor is larger, shows that there are the magnetic disturbances of offset well casing and wellbore friendship to touch risk, and partially
Poor maximum is usually offset well casing collar location, requires transformation into offset well casing string relative position inversion step at this time；
B offset well casing relative position inverting
(1) different well depths pair are recorded by full measurement pattern 2m/ point intensive measurement to the offset well casing magnetic disturbance well section identified
The well track parameter answered, magnetic field parameter；
(2) magnetic field of hole angle, azimuth, magnetic tool face azimuth and the fluxgate sensor actual measurement provided using inclinometer is strong
Degree, magnetic field inclination angle calculate the corresponding relevant parameter in interference magnetic field；Actual measurement magnetic field strength is resolved into B along three reference axisx、
By、Bz；Normal magnetic field intensity is resolved into B along three reference axisx0、By0、Bz0；If interference magnetic field strength is Δ B, corresponding
Three components are Δ Bx、ΔBy、ΔBz, relevant calculation formula is as follows:
(3) interference magnetic field parameter energy is utilized along casing string lateral distance variation relation according to the interference magnetic field strength being previously obtained
Enough final solution offset well casing relative distance r, relative bearing θ, are shown in formula (3) and formula (4):
R=f (Δ B) (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427457.0A CN108166971B (en) | 2017-12-26 | 2017-12-26 | A kind of Multifunctional inclination measuring apparatus and the method based on inclinometer progress offset well casing relative position judgement |
| PCT/CN2018/122898 WO2019128886A1 (en) | 2017-12-26 | 2018-12-21 | Multi-functional inclinometer and inclinometer-based method for determining relative position of casing in adjacent well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427457.0A CN108166971B (en) | 2017-12-26 | 2017-12-26 | A kind of Multifunctional inclination measuring apparatus and the method based on inclinometer progress offset well casing relative position judgement |
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| CN108166971B true CN108166971B (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022125907A1 (en) * | 2020-12-10 | 2022-06-16 | Gyrodata, Incorporated | System and method for using a magnetometer in a gyro-while-drilling survey tool |
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|---|---|---|---|---|
| CN108166971B (en) * | 2017-12-26 | 2019-12-03 | 中国石油大学(华东) | A kind of Multifunctional inclination measuring apparatus and the method based on inclinometer progress offset well casing relative position judgement |
| CN111608581A (en) * | 2020-05-07 | 2020-09-01 | 青岛智腾科技有限公司 | Directional sensor for dynamic measurement |
| CN111734397B (en) * | 2020-07-17 | 2020-11-13 | 中国石油大学(华东) | Near-bit magnetic field imaging positioning measuring instrument and working method |
| CN112922584B (en) * | 2021-01-21 | 2022-12-09 | 中海油田服务股份有限公司 | Adjacent well detection device, method and system |
| CN113107472B (en) * | 2021-05-11 | 2022-12-20 | 京鸿石油钻采工程技术有限公司 | Active magnetic distance measuring device and method suitable for well drilling collision prevention |
| CN113338903B (en) * | 2021-06-07 | 2023-04-28 | 中国石油大学(北京) | Method, device and storage medium for determining relative positions of drilling well and drilled well |
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| WO2019128886A1 (en) | 2019-07-04 |
| CN108166971A (en) | 2018-06-15 |
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