CN103790579B - Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering - Google Patents
Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering Download PDFInfo
- Publication number
- CN103790579B CN103790579B CN201410003509.1A CN201410003509A CN103790579B CN 103790579 B CN103790579 B CN 103790579B CN 201410003509 A CN201410003509 A CN 201410003509A CN 103790579 B CN103790579 B CN 103790579B
- Authority
- CN
- China
- Prior art keywords
- drilling
- drill bit
- distance
- gamma ray
- curve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 285
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005251 gamma ray Effects 0.000 claims description 145
- 230000008859 change Effects 0.000 claims description 84
- 238000004364 calculation method Methods 0.000 claims description 16
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 15
- 230000035515 penetration Effects 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000000342 Monte Carlo simulation Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 241000726221 Gemma Species 0.000 description 1
- 241001637516 Polygonia c-album Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The embodiment of the invention provides a method and a device for determining the distance between a drill bit and a stratum interface in while-drilling geosteering, wherein the method comprises the following steps: acquiring information of natural gamma logging while drilling orientation in real time, and predicting a relative included angle between an interface of a stratum to be drilled and a drilling direction; acquiring the vertical distance between a preset position in the drilling direction and the stratum interface to be drilled and met, wherein the preset position is the position of a detector at the position of a natural gamma curve which changes firstly when a drill bit drills to the stratum interface to be drilled and met; and determining the distance between the drill bit and the stratum interface to be met in the drilling direction according to the relative included angle and the vertical distance. The embodiment of the invention realizes that the distance between the drill bit and the stratum interface to be met by drilling is quantitatively determined by utilizing the information of the natural gamma logging while drilling, thereby being beneficial to better serving for geological guidance by the natural gamma logging while drilling.
Description
Technical field
It is more particularly to a kind of to be bored with determination in boring geosteering the present invention relates to geosteering and technical field of geological exploration
Head and the method and device of bed boundary distance.
Background technology
Geosteering is one of forward position drilling technology that the nineties in 20th century grows up, and is using in drilling process
Geologic parameter or the engineering parameter such as the natural gamma of measurement, density of earth formations, formation resistivity, ring pressure, temperature and pressure, sentence in real time
Breaking of rod head bores the stratum met, and drilling trace is adjusted in time.Using geosteering drill bit can be ensured as far as possible in Favorable Reservoir
Interior drilling, reaches the purpose for improving yield and recovery ratio.With being continuously increased for present horizontal well and directional well, geosteering is
A new and high technology essential in drilling process.
It is a kind of important geosteering with orientation gamma ray log is bored in horizontal well and high angle hole drilling process
Technology, is that multiple gamma detectors are placed in drill collar during well logging, the natural gamma radioactivity of measurement stratum, its
Measurement data has azimuth characteristic, can real-time adjustment drill bit by the upper and lower orientation gamma ray curve for uploading to ground in real time
Drilling trace, keep drill bit crept into reservoir.But in current technology, upload to ground in real time with orientation gamma ray log is bored
The upper and lower orientation gamma curve in face is only used for qualitatively judging whether drill bit creeps into reservoir, and bit course is adjusted, it is impossible to
The distance of rational judgment drill bit and bed boundary.
The content of the invention
The embodiment of the invention provides a kind of with the method and dress of boring determination drill bit and bed boundary distance in geosteering
Put, solve the technical problem of the distance for being unable to rational judgment drill bit and bed boundary in the prior art.
The embodiment of the invention provides a kind of method with determination drill bit and bed boundary distance in geosteering is bored, the party
Method includes：Obtain in real time with the data for boring orientation gamma ray log, prediction will drilling strata interface and drilling direction phase
To angle；Obtain predeterminated position on drilling direction with it is described will drilling strata interface vertical range, wherein, it is described pre-
If position be drill bit bore to it is described will drilling strata interface when, orientation where the gamma ray curve that changes first
The position of detector；Determine that drill bit will bore chance on drilling direction with described according to the relative angle and the vertical range
The distance of bed boundary.
In one embodiment, the data includes described bent with the upper position natural gamma for boring orientation gamma ray log
Line and lower orientation gamma ray curve.
In one embodiment, using well-log information prediction will drilling strata interface and drilling direction relative folder
Angle, including：The drill bit bore to it is described will drilling strata interface when, using occurring first on upper position gamma ray curve
Distance of the change point changed first on the change point of change and lower orientation gamma ray curve on drilling direction, prediction
It is described will drilling strata interface and drilling direction relative angle.
In one embodiment, using the change point changed first on upper position gamma ray curve with lower orientation certainly
Distance of the change point changed first on right gamma curve on drilling direction, prediction it is described will drilling strata interface with
The relative angle of drilling direction, including：Using Monte Carlo Calculation modeling calculation result data, upper position nature gal is obtained
The change point changed first on the change point changed first on horse curve and lower orientation gamma ray curve is in drilling
Distance on direction；By below equation determine it is described will drilling strata interface and drilling direction relative angle：Wherein, RD be it is described will drilling strata interface and drilling direction relative angle
Circular measure value, Δ P be the change point that is changed first on upper position gamma ray curve with lower orientation gamma ray curve on
Distance of the change point for changing first on drilling direction, a, b, c, d are respectively constant.
In one embodiment, the natural gamma of the change point for being changed first on the upper position gamma ray curve
The variable quantity of the natural gamma value of former point is in the first values in value and upper position gamma ray curve；The lower section
The natural gamma value and former point on lower orientation gamma ray curve of the change point changed first on the gamma ray curve of position
Natural gamma value variable quantity in the second values.
In one embodiment, first values be on the upper position gamma ray curve former point from
The 10% to 15% of right gamma value；Second values are the natural gals of former point on the lower orientation gamma ray curve
The 10% to 15% of horse value.
In one embodiment, determine the drill bit on drilling direction according to the relative angle and the vertical range
With it is described will drilling strata interface distance, including：According to the ratio of the vertical range and the sine value of the relative angle
Value, determine the drill bit on drilling direction with it is described will drilling strata interface distance.
In one embodiment, by below equation determine the drill bit on drilling direction with it is described will drilling strata
The distance at interface：Wherein, L be the drill bit on drilling direction with institute
State will drilling strata interface distance,Be it is described will drilling strata interface and drilling side
To relative angle Circular measure value, d0The distance between be the detector with the drill bit, DOI is on drilling direction
Predeterminated position with it is described will drilling strata interface vertical range.
In one embodiment, it is determined that drill bit on drilling direction with it is described will drilling strata interface distance it
Afterwards, also include：According to the drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance.
The embodiment of the present invention additionally provides a kind of device stated with determination drill bit in brill geosteering with bed boundary distance,
The device includes：Angle prediction module, for obtaining in real time with the data for boring orientation gamma ray log, prediction will bore chance ground
Bed boundary and the relative angle of drilling direction；Apart from acquisition module, for obtain the predeterminated position on drilling direction with it is described
Will drilling strata interface vertical range, wherein, the predeterminated position be the drill bit bore to it is described will drilling strata
During interface, the position of the detector in orientation where the gamma ray curve for changing first；Apart from determining module, for basis
The relative angle and the vertical range determine drill bit on drilling direction with it is described will drilling strata interface distance.
In one embodiment, the data includes described bent with the upper position natural gamma for boring orientation gamma ray log
Line and lower orientation gamma ray curve.
In one embodiment, the angle prediction module, for the drill bit bore to it is described will drilling strata circle
During face, using being sent out first on the change point changed first on upper position gamma ray curve and lower orientation gamma ray curve
Distance of the change point of changing on drilling direction, prediction it is described will drilling strata interface and drilling direction relative folder
Angle.
In one embodiment, the angle prediction module includes：Distance acquiring unit, for utilizing Monte Carlo Calculation
Modeling calculation result data, obtains the change point and lower orientation nature changed first on upper position gamma ray curve
Distance of the change point changed first on gamma curve on drilling direction；Angle predicting unit, for by following public affairs
Formula determine it is described will drilling strata interface and drilling direction relative angle：Wherein,
RD be it is described will drilling strata interface and drilling direction relative angle Circular measure value, Δ P is bent upper position natural gamma
The change point changed first on the change point changed first on line and lower orientation gamma ray curve is in drilling direction
On distance, a, b, c, d are respectively constant.
In one embodiment, the natural gamma of the change point for being changed first on the upper position gamma ray curve
The variable quantity of the natural gamma value of former point is in the first values in value and upper position gamma ray curve；The lower section
The natural gamma value and former point on lower orientation gamma ray curve of the change point changed first on the gamma ray curve of position
Natural gamma value variable quantity in the second values.
In one embodiment, first values be on the upper position gamma ray curve former point from
The 10% to 15% of right gamma value；Second values are the natural gals of former point on the lower orientation gamma ray curve
The 10% to 15% of horse value.
In one embodiment, it is described apart from determining module, for according to the vertical range and the relative angle
The ratio of sine value, determine the drill bit on drilling direction with it is described will drilling strata interface distance.
In one embodiment, it is described apart from determining module by below equation determine the drill bit on drilling direction with
It is described will drilling strata interface distance：Wherein, L is the drill bit
On drilling direction with it is described will drilling strata interface distance,It is that described will bore chance
The Circular measure value of the relative angle of bed boundary and drilling direction, d0The distance between be the detector with the drill bit, DOI
Predeterminated position on drilling direction with it is described will drilling strata interface vertical range.
In one embodiment, also include with the device of bed boundary distance with determination drill bit in boring geosteering：Distance
Tracing module, for it is determined that drill bit on drilling direction with it is described will be after the distance at drilling strata interface, according to described
Drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance.
In embodiments of the present invention, will be bored to predict with the data for boring orientation gamma ray log by acquisition in real time
Meet the relative angle of bed boundary and drilling direction, and obtain the predeterminated position on drilling direction with it is described will drilling strata
The vertical range at interface, the predeterminated position be drill bit bore to it is described will drilling strata interface when, change first from
The position of the detector in orientation where right gamma curve, finally, the vertical range of relative angle and acquisition according to prediction is come really
Determine drill bit on drilling direction with it is described will drilling strata interface distance, realize using with bore orientation gamma ray log
Data come quantitatively determine drill bit with it is described will drilling strata interface distance, it is to avoid in the prior art, with bore orientation from
The data of gemma ray logging be only used for qualitatively judge drill bit whether in reservoir drilling and to bit course adjustment defect so that
Help preferably to serve geosteering with brill orientation gamma ray log.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is a kind of method with determination drill bit and bed boundary distance in geosteering is bored provided in an embodiment of the present invention
Flow chart；
Fig. 2 be it is provided in an embodiment of the present invention it is a kind of determine drill bit on drilling direction with will drilling strata interface distance
Schematic diagram；
Fig. 3 be it is provided in an embodiment of the present invention it is a kind of with bore orientation gamma ray log upload to the upper and lower of ground in real time
The schematic diagram of orientation gamma ray curve；
Fig. 4 is a kind of schematic diagram of three-dimensional Monte Carlo Calculation model provided in an embodiment of the present invention；
Fig. 5 is the change changed first on a kind of upper and lower orientation gamma ray curve provided in an embodiment of the present invention
The relation curve schematic diagram of distance and relative angle of the point on drilling direction；
Fig. 6 is provided in an embodiment of the present invention a kind of with the device for boring determination drill bit and bed boundary distance in geosteering
Structured flowchart.
Specific embodiment
It is right with reference to implementation method and accompanying drawing to make the object, technical solutions and advantages of the present invention become more apparent
The present invention is described in further details.Here, exemplary embodiment of the invention and its illustrating for explaining the present invention, but simultaneously
It is not as a limitation of the invention.
In embodiments of the present invention, there is provided a kind of with the side for boring determination drill bit and bed boundary distance in geosteering
Method, as shown in figure 1, the method includes：
Step 101：Obtain in real time with the data for boring orientation gamma ray log, prediction will drilling strata interface and drilling
The relative angle in direction；
Step 102：Obtain predeterminated position on drilling direction with it is described will drilling strata interface vertical range, its
In, the predeterminated position be drill bit bore to it is described will drilling strata interface when, the gamma ray curve for changing first
The position of the detector in place orientation；
Step 103：According to the relative angle and the vertical range determine the drill bit on drilling direction with it is described
Will drilling strata interface distance.
Flow as shown in Figure 1 understands, in embodiments of the present invention, by obtaining in real time with brill orientation gamma ray log
Data come predict will drilling strata interface and drilling direction relative angle, and obtain the default position on drilling direction
Put with it is described will drilling strata interface vertical range, the predeterminated position be drill bit bore to it is described will drilling strata interface
When, the position of the detector in orientation where the gamma ray curve that changes first, finally, relative angle according to prediction and
The vertical range of acquisition come determine drill bit on drilling direction with it is described will drilling strata interface distance, realize using with
Bore the data of orientation gamma ray log quantitatively determine drill bit with it is described will drilling strata interface distance, it is to avoid it is existing
In having a technology, with the data for boring orientation gamma ray log be only used for qualitatively judging drill bit whether in reservoir drilling and to drill bit
The defect of track adjustment, so as to help preferably to serve geosteering with brill orientation gamma ray log.
Using with bore orientation gamma ray log data, prediction will drilling strata interface it is relative with drilling direction
During angle, the above-mentioned natural gamma value that can measure different azimuth in drilling course with brill orientation gamma ray log,
And export the Natural Gamma-ray Logging Curves of different azimuth.During specific implementation, the above-mentioned data with brill orientation gamma ray log is
Upper position in the Natural Gamma-ray Logging Curves with the different azimuth for boring measurement in orientation gamma ray log for obtaining in real time is certainly
Right gamma curve and lower orientation gamma ray curve.
Obtain with after the data for boring orientation gamma ray log, can predict in the following manner will drilling strata circle
The relative angle of face and drilling direction, for example, the drill bit bore to it is described will drilling strata interface when, using upper position from
The change point changed first on the change point changed first on right gamma curve and lower orientation gamma ray curve exists
Distance on drilling direction, i.e., on drilling direction, the change point changed first on upper position gamma ray curve is with
The distance between change point changed first on orientation gamma ray curve, prediction is described will drilling strata interface and brill
Enter the relative angle in direction.
During specific implementation, it is as shown in Figure 2 quantitatively determine drill bit on drilling direction with will drilling strata interface distance
Schematic diagram, 201 be low-activity stratum；202 is high radioactivity stratum；203 for will drilling strata interface；204 is drill collar；
205 is drill bit；206 is upper position gamma detector；207 is lower orientation gamma detector；208 are drill bit in drilling direction and are
By the relative angle at drilling strata interface；209 be bore to it is described will drilling strata interface when, with bore orientation natural gamma survey
Well uploads to the gamma on the change point correspondence position changed first on the upper and lower orientation gamma ray curve on ground in real time
Detector with will drilling strata interface vertical range；210 be drill bit on drilling direction with will drilling strata interface
Distance.If drilling direction with will drilling strata interface 203 relative angle 208, it is known that and default position on drilling direction
Put with it is described will drilling strata interface vertical range 209 understand, then can determine that drill bit 205 on drilling direction with will
The distance 210 at drilling strata interface 203.In embodiments of the present invention, drill bit 205 bore chance will drilling strata interface 203, also
Do not get into will drilling strata interface 203 when, it is possible to use the change point changed first on upper position gamma ray curve
Predicted with distance of the change point changed first on lower orientation gamma ray curve on drilling direction drilling direction with
Will drilling strata interface 203 relative angle 208.
Specifically, it is bent with lower orientation natural gamma to obtain the change point changed first on upper position gamma ray curve
The process of distance of the change point changed first on line on drilling direction is as shown in figure 3, shown in Fig. 3 be drill bit
205 are bored to the upper position gamma ray curve 301 on high radioactivity stratum 202 and lower orientation nature gal from low-activity stratum 201
Horse curve 302, when drill bit 205 creeps into low-activity stratum 201, upper position gamma detector 206 and lower orientation gamma
Detector 207 is in same stratum, therefore, upper position gamma ray curve 301 and the weight of lower orientation gamma ray curve 302
Close；When 205 drilling strata interface 203 of drill bit, high radioactivity stratum 202 enters the detection model of upper position gamma detector 206
Enclose, upper position gamma ray curve 301 and the priority of lower orientation gamma ray curve 302 change, what it changed first
Change point is respectively 303 and 304, the distance between change point 303 and 304 be exactly on upper position gamma ray curve 301 first
The change point 304 changed first on the change point 303 for changing and lower orientation gamma ray curve 302 is in drilling direction
On distance 305（It is designated as Δ P）.
In the specific implementation, the natural gamma value of the change point for being changed first on the upper position gamma ray curve
With the variable quantity of the natural gamma value of former point on upper position gamma ray curve in the first values；The lower orientation
The natural gamma value of the change point changed first on gamma ray curve and former point on lower orientation gamma ray curve
In the second values, first values are the bent upper position natural gammas to the variable quantity of natural gamma value
The 10% to 15% of the natural gamma value of former point on line；Second values are on the lower orientation gamma ray curve
The 10% to 15% of the natural gamma value of former point.I.e. up on the gamma ray curve of position, the change point for changing first
In the first values, first values are the variable quantity of the natural gamma value of natural gamma value and its former point
The 10% to 15% of the natural gamma value of the former point；On lower orientation gamma ray curve, the change point for changing first
In the second values, second values are the variable quantity of the natural gamma value of natural gamma value and its former point
The 10% to 15% of the natural gamma value of the former point.
On upper position gamma ray curve is obtained on the change point that changes first and lower orientation gamma ray curve
During distance of the change point for changing first on drilling direction, in order to exactly predict drilling direction with ground
The relative angle of bed boundary, in the present embodiment, sets up Monte Carlo Calculation model, according to Monte Carlo Calculation modeling meter
Result data is calculated to obtain the change point changed first on upper position gamma ray curve with lower orientation gamma ray curve
On the distance of the change point that changes first on drilling direction, and determine will drilling strata interface and drilling direction phase
To the formula of angle.
During specific implementation, using three-dimensional Monte Carlo Calculation model as shown in Figure 4, the Monte Carlo Calculation model is used
Following setting, the sandstone formation 401 of low-activity is the sandstone formation for being full of fresh water in porosity 15%, hole, stratum natural gal
Horse radioactive intensity is 0；The shale content of the mudstone stratum 402 of high radioactivity is 60%, and the radioactive element in stratum is 5ppm
Uranium, the thorium of 10ppm and 5% potassium；Borehole diameter is 20cm, and wellbore fluid 404 is fresh water；Drill collar 405 is a diameter of
Fresh water is full of in 17.145cm, slurry channel 406,407 is upper position gamma detector；408 is lower orientation gamma detector.It is logical
Cross the angle 208 changed between drilling direction and bed boundary 203 as shown in Figure 2 and be respectively 40 °, 50 °, 60 °, 70 °, 80 °
With 85 °, it is as shown in Figure 3 when simulating 205 drill-through bed boundary 203 of drill bit using Monte Carlo simulation calculation result data
Upper position gamma ray curve 301 and lower orientation gamma ray curve 302, so the drill bit bore to it is described will bore chance ground
During bed boundary, the change point 303 and lower orientation natural gamma changed first on upper position gamma ray curve 301 are determined
Distance, delta P of the change point 304 changed first on curve 302 on drilling direction.
Using Monte Carlo simulation calculation result data, by what is changed first on upper position gamma ray curve 301
Distance, delta of the change point 304 changed first on change point 303 and lower orientation gamma ray curve 302 on drilling direction
Relative angle 208 between P and drilling direction and bed boundary 203 is depicted as curve map as shown in Figure 5, wherein, show in Fig. 5
The RD for showing is the Circular measure value of the relative angle 208 between drilling direction and bed boundary 203, and the relation according to Fig. 5 is bent
Line can determine the equation of the relative angle 208 between drilling direction and bed boundary 203：
Wherein, RD be it is described will drilling strata interface and drilling direction relative angle Circular measure value, Δ P is top
The change changed first on the change point that changes first and lower orientation gamma ray curve on the gamma ray curve of position
Distance of the point on drilling direction, a, b, c, d are respectively constant.
Will in the present embodiment be obtained after the relative angle of drilling strata interface and drilling direction predicting
Predeterminated position on drilling direction with it is described will drilling strata interface vertical range, in order to it is easy, accurately determine out brill
Head on drilling direction with it is described will drilling strata interface distance, above-mentioned predeterminated position be the drill bit bore to it is described i.e.
During by drilling strata interface, the position of the detector in orientation, that is, work as upper and lower where the gamma ray curve for changing first
When position gamma ray curve changes, if first there is the change point for changing first in upper position gamma ray curve,
When the predeterminated position is that upper position gamma ray curve the change point for changing first occurs, top is gamma detector place
Position；If the change point for changing first first occurs in lower orientation gamma ray curve, the predeterminated position is lower orientation
When the change point for changing first occurs in gamma ray curve, lower section is the position where gamma detector.As shown in Fig. 2
Occur in high radioactivity stratum 202 has just enter into the investigative range of upper position gamma detector 206, upper position gamma ray curve first
During the change point for first changing, above-mentioned vertical range be exactly the change point upper position gamma detector 206 with will bore
Meet the vertical range 209 of bed boundary 203, the referred to as investigation depth of gamma ray log（It is designated as DOI）.
Predict will drilling strata interface and drilling direction relative angle, get predeterminated position with it is described will
After the vertical range at drilling strata interface, as shown in Fig. 2 can be according to the sine of above-mentioned vertical range and above-mentioned relative angle
The ratio of value come determine drill bit on drilling direction with it is described will drilling strata interface distance.
During specific implementation, can also determine that the drill bit will bore chance ground on drilling direction with described by below equation
The distance of bed boundary：
Wherein, L be the drill bit on drilling direction with it is described will drilling strata interface distance,Be it is described will drilling strata interface and drilling direction relative angle Circular measure value, d0
The distance between be the detector with the drill bit, DOI is that the predeterminated position on drilling direction will bore chance ground with described
The vertical range of bed boundary.
Determine drill bit on drilling direction with it is described will be after the distance at drilling strata interface, with the brill of drill bit
Enter, can also track in real time drill bit on drilling direction with it is described will drilling strata interface current distance, for example, according to
The drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance, specifically, can be according to following
Formula come track the drill bit with it is described will drilling strata interface distance：
V is drill bit rate of penetration；T is the change point that drill bit changes first by upper position gamma ray curve 301
Time afterwards.It is worth to show drill bit drill-through bed boundary if negative if L ', the absolute value of its value is drill bit in drilling direction
The distance of upper and bed boundary.
Describe above-mentioned with the side for boring determination drill bit and bed boundary distance in geosteering below in conjunction with specific embodiment
Method, the method comprises the following steps：
Step 1：Obtain in real time with the data for boring orientation gamma ray log.
Step 2：Obtain it is described upload in real time in the well-log information on ground upper position gamma ray curve and lower orientation from
Right gamma curve.
Step 3：Drill bit bore to will drilling strata interface when, it is bent using the upper position natural gamma in the well-log information
Line and lower orientation gamma ray curve, prediction drilling direction and relative angle that will be between drilling strata interface.Specific real
Shi Shi, the relative angle is with the upper position gamma ray curve and lower orientation nature that bore orientation gamma ray log using described
Distance of the change point changed first on gamma curve on drilling direction is obtained.
Step 4：Drill bit bore to will drilling strata interface when, the gamma ray curve place side that changes first of acquisition
The gamma detector of position and the vertical range of the bed boundary.In a specific embodiment, the vertical range is nature gal
Horse well logging investigation depth.
Step 5：Quantitatively determine drill bit on drilling direction with the distance of bed boundary.
Determination drill bit and ground in a kind of geosteering with brill are additionally provided based on same inventive concept, in the embodiment of the present invention
The device of bed boundary distance, as described in the following examples.Due to determination drill bit and bed boundary distance in brill geosteering
The principle of device solve problem determine that drill bit is similar to the method for bed boundary distance in geosteering to boring, therefore with brill
Determine in geosteering the device of drill bit and bed boundary distance implementation may refer to bore determine in geosteering drill bit with
The implementation of the method for bed boundary distance, repeats part and repeats no more.Used below, term " unit " or " module " can
To realize the combination of the software and/or hardware of predetermined function.Although the device described by following examples is preferably come with software
Realize, but hardware, or the realization of the combination of software and hardware is also that may and be contemplated.
Fig. 6 is a kind of being tied with the of the device of bed boundary distance with determination drill bit in boring geosteering for the embodiment of the present invention
Structure block diagram, as shown in fig. 6, including：Angle prediction module 601, apart from acquisition module 602, apart from determining module 603, below it is right
The structure is illustrated.
Angle prediction module 601, for obtaining in real time with the data for boring orientation gamma ray log, prediction will bore chance ground
Bed boundary and the relative angle of drilling direction；Apart from acquisition module 602, it is connected with angle prediction module 601, is being bored for obtaining
The predeterminated position entered on direction with it is described will drilling strata interface vertical range, wherein, the predeterminated position is described
Drill bit bore to it is described will drilling strata interface when, the position of the detector in orientation where the gamma ray curve that changes first
Put；Apart from determining module 603, it is connected with apart from acquisition module 602, for true according to the relative angle and the vertical range
Determine drill bit on drilling direction with it is described will drilling strata interface distance.
In one embodiment, the data includes described bent with the upper position natural gamma for boring orientation gamma ray log
Line and lower orientation gamma ray curve.
In one embodiment, the angle prediction module 601, for the drill bit bore to it is described will drilling strata
During interface, using on the change point changed first on upper position gamma ray curve and lower orientation gamma ray curve first
Distance of the change point for changing on drilling direction, prediction it is described will drilling strata interface and drilling direction relative folder
Angle.
In one embodiment, the angle prediction module 601 includes：Distance acquiring unit, for utilizing Monte Carlo
Computation model simulates calculation result data, obtains the change point and lower orientation changed first on upper position gamma ray curve
Distance of the change point changed first on gamma ray curve on drilling direction；Angle predicting unit, for by with
Lower formula determine it is described will drilling strata interface and drilling direction relative angle：
Wherein, RD be it is described will drilling strata interface and drilling direction relative angle Circular measure value, Δ P is upper position nature gal
The change point changed first on the change point changed first on horse curve and lower orientation gamma ray curve is in drilling
Distance on direction, a, b, c, d are respectively constant.
In one embodiment, the natural gamma of the change point for being changed first on the upper position gamma ray curve
The variable quantity of the natural gamma value of former point is in the first values in value and upper position gamma ray curve；The lower section
The natural gamma value and former point on lower orientation gamma ray curve of the change point changed first on the gamma ray curve of position
Natural gamma value variable quantity in the second values.
In one embodiment, first values be on the upper position gamma ray curve former point from
The 10% to 15% of right gamma value；Second values are the natural gals of former point on the lower orientation gamma ray curve
The 10% to 15% of horse value.
In one embodiment, it is described apart from determining module 603, for according to the vertical range and the relative angle
Sine value ratio, determine drill bit on drilling direction with it is described will drilling strata interface distance.
In one embodiment, it is described to determine the drill bit in drilling direction by below equation apart from determining module 603
On with it is described will drilling strata interface distance：Wherein, bored described in L
Head on drilling direction with it is described will drilling strata interface distance,It is that described will bore
Meet the Circular measure value of bed boundary and the relative angle of drilling direction, d0The distance between be the detector with the drill bit,
DOI be predeterminated position on drilling direction with it is described will drilling strata interface vertical range.
In one embodiment, also include with the device of bed boundary distance with determination drill bit in boring geosteering：Distance
Tracing module, for it is determined that drill bit on drilling direction with it is described will be after the distance at drilling strata interface, according to described
Drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance.
In embodiments of the present invention, will be bored to predict with the data for boring orientation gamma ray log by acquisition in real time
Meet the relative angle of bed boundary and drilling direction, and obtain the predeterminated position on drilling direction with it is described will drilling strata
The vertical range at interface, the predeterminated position be the drill bit bore to it is described will drilling strata interface when, change first
Gamma ray curve where orientation detector position, finally, according to prediction relative angle and obtain vertical range
Come determine drill bit on drilling direction with it is described will drilling strata interface distance, realize using with bore orientation natural gamma
The data of well logging come quantitatively determine drill bit with it is described will drilling strata interface distance, it is to avoid in the prior art, with brill side
Position gamma ray log data be only used for qualitatively judge drill bit whether in reservoir drilling and to bit course adjustment defect,
So as to help preferably to serve geosteering with brill orientation gamma ray log.
Obviously, those skilled in the art should be understood that each module or each step of the above-mentioned embodiment of the present invention can be with
Realized with general computing device, they can be concentrated on single computing device, or be distributed in multiple computing devices
On the network for being constituted, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to by it
Store and performed by computing device in the storage device, and in some cases, can be held with different from order herein
The shown or described step of row, or they are fabricated to each integrated circuit modules respectively, or by the multiple in them
Module or step are fabricated to single integrated circuit module to realize.So, the embodiment of the present invention is not restricted to any specific hard
Part and software are combined.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the embodiment of the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvements etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of method that drill bit and bed boundary distance are determined in geosteering with brill, it is characterised in that including：
Obtain in real time with the data for boring orientation gamma ray log, prediction will drilling strata interface and drilling direction relative folder
Angle；
Obtain predeterminated position on drilling direction with it is described will drilling strata interface vertical range, wherein, it is described default
Position be drill bit bore to it is described will drilling strata interface when, the spy in orientation where the gamma ray curve that changes first
Survey the position of device；
According to the relative angle and the vertical range determine the drill bit on drilling direction with it is described will drilling strata
The distance at interface；
The data includes described with the upper position gamma ray curve and lower orientation natural gamma that bore orientation gamma ray log
Curve；
Using data prediction will drilling strata interface and drilling direction relative angle, including：
The drill bit bore to it is described will drilling strata interface when, using being changed first on upper position gamma ray curve
Change point and lower orientation gamma ray curve on the distance of the change point that changes first on drilling direction, prediction is described
Will drilling strata interface and drilling direction relative angle；
The natural gamma value of the change point changed first on the upper position gamma ray curve and upper position natural gamma
The variable quantity of the natural gamma value of former point is in the first values on curve；
The natural gamma value of the change point changed first on the lower orientation gamma ray curve and lower orientation natural gamma
The variable quantity of the natural gamma value of former point is in the second values on curve；
First values be the natural gamma value of former point on the upper position gamma ray curve 10% to
15%；
Second values be the natural gamma value of former point on the lower orientation gamma ray curve 10% to
15%；
Using being sent out first on the change point changed first on upper position gamma ray curve and lower orientation gamma ray curve
Distance of the change point of changing on drilling direction, prediction it is described will drilling strata interface and drilling direction relative folder
Angle, including：
Using Monte Carlo Calculation modeling calculation result data, obtain and changed first on upper position gamma ray curve
Change point and lower orientation gamma ray curve on the distance of the change point that changes first on drilling direction；
By below equation determine it is described will drilling strata interface and drilling direction relative angle：
Wherein, RD be it is described will drilling strata interface and drilling direction relative angle Circular measure value, Δ P be upper position from
The change point changed first on the change point changed first on right gamma curve and lower orientation gamma ray curve exists
Distance on drilling direction, a, b, c, d are respectively constant.
2. as claimed in claim 1 with the method for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that root
According to the relative angle and the vertical range determine the drill bit on drilling direction with it is described will drilling strata interface
Distance, including：
According to the ratio of the vertical range and the sine value of the relative angle, determine the drill bit on drilling direction with institute
State will drilling strata interface distance.
3. as claimed in claim 2 with the method for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that logical
Cross below equation determine the drill bit on drilling direction with it is described will drilling strata interface distance：
Wherein, L be the drill bit on drilling direction with it is described will drilling strata interface distance,
Be it is described will drilling strata interface and drilling direction relative angle Circular measure value, d0It is the detector and the drill bit
The distance between, DOI be predeterminated position on drilling direction with it is described will drilling strata interface vertical range.
4. as claimed in claim 1 with the method for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that
Determine that drill bit will also include after the distance at drilling strata interface on the drilling direction with described：
According to the drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance.
5. a kind of with the device for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that including：
Angle prediction module, for obtaining with the data for boring orientation gamma ray log in real time, prediction will drilling strata interface
With the relative angle of drilling direction；
Apart from acquisition module, for obtain the predeterminated position on drilling direction with it is described will drilling strata interface it is vertical away from
From, wherein, the predeterminated position be the drill bit bore to it is described will drilling strata interface when, the nature for changing first
The position of the detector in orientation where gamma curve；
Apart from determining module, for according to the relative angle and the vertical range determine the drill bit on drilling direction with
It is described will drilling strata interface distance；
The data includes described with the upper position gamma ray curve and lower orientation natural gamma that bore orientation gamma ray log
Curve；
The angle prediction module, for the drill bit bore to it is described will drilling strata interface when, using upper position nature
The change point changed first on the change point changed first on gamma curve and lower orientation gamma ray curve is being bored
The distance entered on direction, prediction it is described will drilling strata interface and drilling direction relative angle；
The natural gamma value of the change point changed first on the upper position gamma ray curve and upper position natural gamma
The variable quantity of the natural gamma value of former point is in the first values on curve；
The natural gamma value of the change point changed first on the lower orientation gamma ray curve and lower orientation natural gamma
The variable quantity of the natural gamma value of former point is in the second values on curve；
First values be the natural gamma value of former point on the upper position gamma ray curve 10% to
15%；
Second values be the natural gamma value of former point on the lower orientation gamma ray curve 10% to
15%；
The angle prediction module includes：
Distance acquiring unit, for utilizing Monte Carlo Calculation modeling calculation result data, obtains upper position natural gamma
The change point changed first on the change point changed first on curve and lower orientation gamma ray curve is in drilling side
Upward distance；
Angle predicting unit, for by below equation determine it is described will drilling strata interface and drilling direction relative folder
Angle：
Wherein, RD be it is described will drilling strata interface and drilling direction relative angle Circular measure value, Δ P be upper position from
The change point changed first on the change point changed first on right gamma curve and lower orientation gamma ray curve exists
Distance on drilling direction, a, b, c, d are respectively constant.
6. as claimed in claim 5 with the device for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that institute
State apart from determining module, for according to the vertical range and the ratio of the sine value of the relative angle, determining the drill bit
On drilling direction with it is described will drilling strata interface distance.
7. as claimed in claim 6 with the device for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that institute
State apart from determining module by below equation determine the drill bit on drilling direction with it is described will drilling strata interface away from
From：
Wherein, L be the drill bit on drilling direction with it is described will drilling strata interface distance,
Be it is described will drilling strata interface and drilling direction relative angle Circular measure value, d0It is the detector and the drill bit
The distance between, DOI be predeterminated position on drilling direction with it is described will drilling strata interface vertical range.
8. as claimed in claim 5 with the device for boring determination drill bit and bed boundary distance in geosteering, it is characterised in that also
Including：
Track in range module, for it is determined that the drill bit on drilling direction with it is described will drilling strata interface distance it
Afterwards, according to the drill bit rate of penetration track the drill bit with it is described will drilling strata interface distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003509.1A CN103790579B (en) | 2014-01-03 | 2014-01-03 | Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003509.1A CN103790579B (en) | 2014-01-03 | 2014-01-03 | Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103790579A CN103790579A (en) | 2014-05-14 |
| CN103790579B true CN103790579B (en) | 2017-07-07 |
Family
ID=50666590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410003509.1A Active CN103790579B (en) | 2014-01-03 | 2014-01-03 | Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103790579B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10995604B2 (en) | 2015-12-01 | 2021-05-04 | Schlumberger Technology Corporation | Closed loop control of drilling curvature |
| CN108625842A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of wellbore trace control method and system |
| CN108952569B (en) * | 2017-05-26 | 2020-12-01 | 中国石油天然气股份有限公司 | Drilling track control method for horizontal well of bottom water layer oil and gas reservoir |
| CN111737868A (en) * | 2020-06-16 | 2020-10-02 | 中国石油集团渤海钻探工程有限公司 | Natural gamma curve prediction while drilling method based on time series algorithm |
| CN112983385B (en) * | 2021-05-12 | 2021-08-10 | 中煤科工集团西安研究院有限公司 | Broken soft low-permeability coal seam roof or bottom plate segmented fracturing horizontal well coal seam gas extraction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676874A (en) * | 2005-04-14 | 2005-10-05 | 中国石化集团胜利石油管理局钻井工艺研究院 | Well deflection and position gamma measuring nistrument during drilling |
| CN101476463A (en) * | 2009-01-23 | 2009-07-08 | 丛山 | Drill-following natural gamma geosteering method for horizontal well |
| CN102707325A (en) * | 2012-05-28 | 2012-10-03 | 中国石油大学(华东) | Azimuth gamma measuring method and equipment |
| CN103109040A (en) * | 2010-07-30 | 2013-05-15 | 国际壳牌研究有限公司 | Monitoring of drilling operations with flow and density measurement |
| CN103174413A (en) * | 2013-04-19 | 2013-06-26 | 中国石油集团钻井工程技术研究院 | Drilling tool and method for detecting reservoir stratum boundary and thickness while drilling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7191850B2 (en) * | 2004-10-28 | 2007-03-20 | Williams Danny T | Formation dip geo-steering method |
-
2014
- 2014-01-03 CN CN201410003509.1A patent/CN103790579B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676874A (en) * | 2005-04-14 | 2005-10-05 | 中国石化集团胜利石油管理局钻井工艺研究院 | Well deflection and position gamma measuring nistrument during drilling |
| CN101476463A (en) * | 2009-01-23 | 2009-07-08 | 丛山 | Drill-following natural gamma geosteering method for horizontal well |
| CN103109040A (en) * | 2010-07-30 | 2013-05-15 | 国际壳牌研究有限公司 | Monitoring of drilling operations with flow and density measurement |
| CN102707325A (en) * | 2012-05-28 | 2012-10-03 | 中国石油大学(华东) | Azimuth gamma measuring method and equipment |
| CN103174413A (en) * | 2013-04-19 | 2013-06-26 | 中国石油集团钻井工程技术研究院 | Drilling tool and method for detecting reservoir stratum boundary and thickness while drilling |
Non-Patent Citations (1)
| Title |
|---|
| 近钻头方位伽马射线成像工具在超薄油藏中的地质导向新技术;吴振华等;《国外测井技术》;20110415(第2期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103790579A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11782741B2 (en) | Modeling of fluid introduction and/or fluid extraction elements in simulation of coreflood experiment | |
| US8762118B2 (en) | Modeling hydraulic fractures | |
| US20150370934A1 (en) | Completion design based on logging while drilling (lwd) data | |
| US20210332690A1 (en) | Method and system of combined support for a well drilling process | |
| CN103790579B (en) | Method and device for determining distance between drill bit and stratum interface in while-drilling geological steering | |
| WO2016037168A1 (en) | Well survivability in multidimensional geomechanical space | |
| CN106154322B (en) | Log curve correction method and apparatus | |
| CN107784159B (en) | Method for determining anisotropic coefficient of reservoir resistivity | |
| CN103774988A (en) | Real-time while-drilling gamma forward modeling geo-steering drilling method | |
| US10386523B2 (en) | Subsurface formation modeling with integrated stress profiles | |
| BRPI1004697B1 (en) | method and system for directing well drilling operations, and computer readable medium storing instructions for such drilling | |
| EP3911837B1 (en) | Well planning using geomechanics nudge | |
| BRPI1005003A2 (en) | Method of Guiding Well Drilling Operation Using Accidental Measurements, System for Guiding Well Drilling Operation Using Rock Stress Measurements, and Computer Readable Storing Instructions for Guiding a Well Drilling Operation Using Accurate Well Measurements | |
| CN104948176A (en) | Method for identifying carbonate reservoir fractures based on permeability increasing rate | |
| CN106249300B (en) | Method and device for determining TOC content and heterogeneity of source rock based on well-seismic combination | |
| WO2020153972A1 (en) | Evaluating anisotropic effective permeability in rock formations having natural fracture networks | |
| EP3274552A1 (en) | Formation pressure determination | |
| US11320565B2 (en) | Petrophysical field evaluation using self-organized map | |
| Luthi et al. | The application of outcrop-based research boreholes for reservoir modelling: potential, challenges and pitfalls | |
| US11391860B2 (en) | Anisotropic formation modeling | |
| US20240035366A1 (en) | Use of self-organizing-maps with logging-while-drilling data to delineate reservoirs in 2d and 3d well placement models | |
| CN113767210B (en) | Real-time productivity assessment of sidetracking for construction decisions | |
| Hassan et al. | Refactoring Carbonate Reservoir Architecture through Real-Time LWD Measurement | |
| Lee et al. | The importance of borehole image logs analysis in shale gas reservoirs development | |
| BR112020012900B1 (en) | COMPUTER-IMPLEMENTED METHOD TO GENERATE A HIGH-RESOLUTION LITHOLOGY MODEL AND SYSTEM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |