CN108625842A - A kind of wellbore trace control method and system - Google Patents
A kind of wellbore trace control method and system Download PDFInfo
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- CN108625842A CN108625842A CN201710174782.4A CN201710174782A CN108625842A CN 108625842 A CN108625842 A CN 108625842A CN 201710174782 A CN201710174782 A CN 201710174782A CN 108625842 A CN108625842 A CN 108625842A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
Abstract
The invention discloses a kind of wellbore trace control method and systems comprising following steps：Stratigraphic section model is built, determines ground layer line and the path line in section model；Based on stratigraphic section model, interface distance, lower interface distance are calculated separately, bores and meets interface distance and drill bit front interface distance；The upper interface distance, lower interface distance are shown on stratigraphic section model, bores and meets interface distance and drill bit front interface distance, according to each distance controlling wellbore trace.The present invention can quickly and effectively realize interface on drill bit relative target layer, lower interface, the calculating for boring the relative distance for meeting interface and drill bit front interface, solution is provided especially for the automated drilling for realizing effective, accurate, real-time, inexpensive, operating personnel can be reminded to adjust bit course in time, High-quality Reservoir Drilling ratio is turned up, oil and gas production is turned up.
Description
Technical field
The present invention relates to oil and gas developments and Exploration Domain, and in particular to one kind is for calculating drill bit with respect to position in drilling process
It sets, to instruct drilling engineer quick and precisely to adjust the method and system at wellbore trace inclination angle.
Background technology
Currently, in the drilling prospections development technique such as oil, natural gas field, in horizontal well operation process, geosteering
Technology starts extensive use.In geosteering process, one of the most key technology is exactly on drill bit relative target stratum
The computational methods of the relative distance at interface, lower interface and drill bit front interface.
Existing common method is mainly by under conditions of manual intervention, passing through computer measurement and calculating.This side
The experience that formula needs field engineer abundant, in conjunction with certain computational methods., tracking accuracy requirement high for requirement of real-time
Higher accurate steerable drilling, it is very unfavorable.On the one hand limited by field engineer's experience, cannot be formed standardization, oneself
The computational methods and software control platform of dynamicization and software implementation.On the other hand it is readily incorporated artificial calculating error.
It is very more for the control technology research of bit course both at home and abroad, but for how quickly and effectively to realize drill bit phase
It is less to the quick calculating research of the relative distance at interface, lower interface and drill bit front interface on destination layer, have especially for realization
The computational methods that effect, accurate, real-time, low cost automated drilling provide solution are less.
Invention content
The first technical problem to be solved by the present invention is to need to provide a kind of automatic calculating drill bit relative target layer upper bound
The computational methods of the relative distance in face, lower interface and drill bit front interface.
In order to solve the above-mentioned technical problem, embodiments herein provides firstly a kind of wellbore trace control method, should
Method comprises the steps of：Step 1：Stratigraphic section model is built, determines ground layer line and the path line in section model；Step
Two：Based on stratigraphic section model, calculate separately interface distance, lower interface distance, bore meet interface distance and drill bit front interface away from
From；Step 3：Before showing that the upper interface distance, lower interface distance, brill meet interface distance and drill bit on stratigraphic section model
Interface distance, according to each distance controlling wellbore trace.
Preferably, in the step 1, the horizontal of the track is calculated based on the well track in three dimension strata model and is thrown
Shadow angle；According to well track floor projection angle, ground layer line and path line are projected, formed under two dimensional surface side view
Ground layer line and path line；By under the two-dimensional level side view ground layer line and path line carry out vectorized process obtain stratum
Vector model, using the stratum vector model as the stratigraphic section model.
Preferably, in the step 2, each upper interface distance, lower interface distance is calculated using following formula, bores and meets
Interface distance and drill bit front distance：
Di=SQRT ((xi-a)2+(yi-b)2)
Wherein, i=1,2,3,4；D1Interface distance, D in expression2Indicate lower interface distance, D3It indicates to bore and meets interface distance,
D4Indicate drill bit front interface distance；(x1,y1) indicate drill bit current location to the coordinate of the vertical point at upper interface, (x2,y2) indicate
Drill bit current location is to the coordinate of the vertical point at lower interface, (x3,y3) currently creep into possible drilling strata up or down interface under inclination angle
Position coordinates, (x4,y4) indicate that drill bit reaches the coordinate of the vertical point on the preceding stratum of drill bit；SQRT indicates extraction of square root symbol；(a,b)
Indicate drill bit current position coordinates.
Preferably, in the step 2, spline interpolation processing, formation office first are carried out to the ground layer line of stratum section model
The smooth ground layer line in portion；With the calculating drill bit point attachment again minimum distance of the line transect and drill bit in layer line setting range, as
The upper interface distance D on drill bit relative target stratum1With lower interface distance D2。
Preferably, in the step 2, using drill bit point coordinates as basic point, straight line is built according to the drilling angle of inclination beta of acquisition
Equation；Judge whether the straight line intersects with the upper parting line or lower parting line, if intersection, calculates to bore and meet interface distance D3,
And point out the upper and lower interface of intersection.
The drill bit for being preferably based on acquisition currently creeps into angle of inclination beta, searches for before drill bit stratum in setting range, searches and mesh
Mark other ground layer line of stratum intersection；If so, then there is tomography before drill bit, and calculate formation distance D before drill bit4, if not provided,
Then without tomography.
Preferably, in the step 3, wellbore trace control method is as follows：By the upper and lower interface distance and setting threshold
Value is made comparisons, and judges current drill bit in the position of formation at target locations according to the relationship of the two, adjustment drill bit creeps into inclination angle；Based on Zuan Yu circle
Identity distance may drill with a distance from formation at target locations from determining drill bit, be adjusted to drilling inclination angle；Sentenced according to drill bit front interface distance
Whether there is or not tomography and determination and tomography distances, adjustment drill bit to creep into inclination angle in front of breaking of rod head.
On the other hand, the embodiment of the present invention additionally provides a kind of wellbore trace control system, which comprises the following modules：
Stratigraphic section model construction module builds stratigraphic section model, determines ground layer line and the path line in section graph model；Four away from
From computing module, it is based on stratigraphic section model, interface distance, lower interface distance is calculated separately, bores and meet interface distance and brill
Head front interface distance；TRAJECTORY CONTROL module shows the upper interface distance, lower interface distance, brill on stratigraphic section model
Interface distance and drill bit front interface distance are met, according to each distance controlling wellbore trace.
Preferably, further comprise following judging unit in the TRAJECTORY CONTROL module：Bit location judging unit,
The upper and lower interface distance is made comparisons with given threshold, judges current drill bit in the position of formation at target locations according to the relationship of the two；
It bores and meets interface judging unit, meeting interface distance based on the brill determines that drill bit may drill formation at target locations distance；Tomography is searched for
Unit, according in front of drill bit front interface Distance Judgment drill bit, whether there is or not tomography and determination and tomography distances.
Preferably, in the stratigraphic section model construction module, further comprise such as lower unit：Well track level is thrown
Shadow angle acquiring unit calculates the floor projection angle of the track based on the well track in three dimension strata model；Two dimensional surface side
View construction unit projects ground layer line and path line according to well track floor projection angle, forms two dimensional surface
Ground layer line under side view and path line；Stratigraphic section vector model construction unit, by the ground under the two dimensional surface side view
Layer line and path line carry out vectorized process and obtain stratum vector model, using the stratum vector model as the stratigraphic section
Model.
Compared with prior art, one or more of said program embodiment can have the following advantages that or beneficial to effect
Fruit：
The method that the present invention uses can quickly and effectively realize interface, lower interface, Zuan Yu circle on drill bit relative target layer
The calculating of the relative distance of face and drill bit front interface, especially for the automated drilling realized effectively, accurate, real-time, inexpensive
Solution is provided so that wellbore construction personnel can adjust bit course in time, in case drill bit punches bed boundary, it is ensured that
Drill bit is walked in the upper and lower interface of stratum always, and High-quality Reservoir Drilling ratio is turned up, and oil and gas production is turned up.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that being understood by implementing technical scheme of the present invention.The purpose of the present invention and other advantages can by
Specifically noted structure and/or flow are realized and are obtained in specification, claims and attached drawing.
Description of the drawings
Attached drawing is used for providing to the technical solution of the application or further understanding for the prior art, and constitution instruction
A part.Wherein, technical side of the attached drawing of the embodiment of the present application together with embodiments herein for explaining the application is expressed
Case, but do not constitute the limitation to technical scheme.
Fig. 1 is the module diagram of the wellbore trace control system of the embodiment of the present application.
Fig. 2 is the schematic diagram of the structure stratigraphic section model of the embodiment of the present application.
Fig. 3 is the schematic diagram of the stratum vector model of the ground layer line and path line including vector quantization of the embodiment of the present application.
Fig. 4 is the four distance definition schematic diagrames of the embodiment of the present application.
Fig. 5 is the analog result schematic diagram of four distance of calculating of the embodiment of the present application.
Fig. 6 is the idiographic flow schematic diagram of the wellbore trace control method of the embodiment of the present application.
Specific implementation mode
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to be applied to the present invention whereby
Technological means solves technical problem, and the realization process for reaching relevant art effect can fully understand and implement.This Shen
Each feature that please be in embodiment and embodiment, can be combined with each other under the premise of not colliding, be formed by technical solution
Within protection scope of the present invention.
In addition, the flow of attached drawing can be in the computer system of such as a group of computer-executable instructions the step of illustrating
Middle execution.Also, although logical order is shown in flow charts, and it in some cases, can be with different from herein
Sequence executes shown or described step.
It is above-mentioned in the prior art in order to overcome the shortcomings of, present embodiments provide interface on a kind of drill bit relative target layer,
The computational methods of the relative distance of lower interface and drill bit front interface, this method can be after model foundation completions, by processor
Equal controllers calculate the relative position of drill bit in real time automatically.Based on this, drilling implementer can be instructed quick and precisely to adjust drilling well rail
Destination layer is punched in mark inclination angle, prevention, it is ensured that track is walked in destination layer.On the other hand, additionally it is possible to join for wellbore trace, drilling well
Number adjustment provides decision-making foundation, to well drilling efficiency of improving the standard, High-quality Reservoir Drilling ratio.
Fig. 1 is the module diagram of the wellbore trace control system of the embodiment of the present application, which includes stratigraphic section mould
Type builds module 1, upper and lower interface meets interface distance determining module 3, the determining mould of drill bit front interface distance apart from determining module 2, brill
Block 4 and TRAJECTORY CONTROL module 5, wherein upper and lower interface meet interface distance determining module 3, drill bit front interface apart from determining module 2, brill
A specific example apart from determining module 4 as four distance calculation modules.
As shown in Figure 1, stratigraphic section vector model structure module 1 builds stratigraphic section model, determine in section graph model
Ground layer line and path line.The module 1 includes three units：Well track floor projection angle acquiring unit 11, two dimensional surface side
View construction unit 12 and stratigraphic section model construction unit 13.Well track floor projection angle acquiring unit 11 is based on dimensionally
Well track in layer model calculates the floor projection angle of the track；Two dimensional surface side view construction unit 12 is according to above-mentioned wellbore
Track floor projection angle, ground layer line and path line are projected, and form ground layer line and path line under two dimensional surface side view；
Ground layer line and path line progress vectorized process under above-mentioned two-dimensional side view are built ground by stratigraphic section model construction unit 13
Layer section vector model.
Fig. 2 is the schematic diagram of the structure stratigraphic section model of the embodiment of the present application, as shown in Fig. 2, left figure is three-dimensional formation
Model is based on the threedimensional model, and the well track floor projection angle acquiring unit 11 of module 1 is built by stratigraphic section vector model
Calculate well track floor projection angleTwo dimensional surface side view construction unit 12 presses the ground layer line and path line of threedimensional model
According to floor projection angleIt is projected, the two-dimensional level side view for forming threedimensional model is two-dimentional stratigraphic section, such as right figure
It is shown.
It should be noted that in the present embodiment, the calculating at well track floor projection angle using the track of horizontal segment come
It determines, according to the initial position space coordinate point (x of acquisition0,y0,z0) with calculate the every bit space coordinate (x of tracki,yi,
zi) horizontal segment projection orientation angle is obtained, the expression formula is as follows：
WhereinIndicate that projection orientation angle, unit are degree；Arctan is arctan function；N indicates track data points；i
=0~n is coordinate points serial number, and ∑ accords with for data accumulation, and add up ranging from 0~n.
Finally, stratigraphic section model construction unit 13 is according to the ground layer line and path line under above-mentioned two dimensional surface side view,
Vector quantization section ground layer line and path line, form stratigraphic section vector model.As shown in figure 3, left figure is two-dimentional stratigraphic section
Vector model, thick lines curve is the bit course line of vector quantization, right figure for vector quantization layer line schematic diagram, each stratum
Form two parting lines up and down, wherein top is the upper interface stratum line of vector quantization, is the lower interface of vector quantization below path line
Ground layer line.In this embodiment, bit course line is with should remaining at the upper and lower interface of formation at target locations between layer line.
Next, being illustrated to four distance calculation modules.Four distance calculation modules are divided according to stratigraphic section vector model
Above interface distance, lower interface distance, brill formation distance before interface distance and drill bit Ji Suan not be met.In order to facilitate understanding, join below
Illustrate the definition of this four distances according to Fig. 4.As shown in figure 4, in the present embodiment, drill bit current location is labeled as A points, coordinate is
A (a, b), base level fragment position are labeled as O points, and space coordinate is O (x0,y0), horizontal segment is labeled as OA, A points to upper interface
Vertical point is labeled as B points, and coordinate is B (x1,y1), A to B points distance (being labeled as AB) is defined as interface distance D1, abbreviation D1。A
The vertical point at point to lower interface is labeled as C points, and coordinate is C (x2,y2), the distance definition of A to C points is lower interface distance D2, referred to as
D2.β is the current drilling inclination angle of the drill bit of acquisition, the as angle in drill bit current track direction and horizontal direction, current drilling
Possible drilling strata up or down interface location is labeled as D points under inclination angle, and coordinate is D (x3,y3), A to D points distance (being labeled as AD)
It is defined as boring and meets interface distance D3, abbreviation D3.Drill bit reaches the vertical of drill bit preceding stratum (the non-targeted layer of such as tomography layer line)
Point is labeled as E points, and space coordinate is E (x4,y4), A to E points distance (being labeled as AE) is defined as boring front interface distance D4, referred to as
D4。
In the definition and then secondary reference for having understood this four distances such as Fig. 1, illustrate the specific of four distance calculation module
Composition and each functions of modules.The module includes three modules：Upper and lower interface meets interface distance apart from determining module 2, brill and determines mould
Formation distance determining module 4 before block 3 and drill bit.
Upper and lower interface is apart from the computationally interface distance D of determining module 21With lower interface distance D2When, it needs first to vector
Layer line carries out spline interpolation processing, forms the curve of local relative smooth, according near smooth stratum line computation drill bit point
The minimum distance of line transect and drill bit in layer line setting range, the distance D as upper and lower interface1And D2.Upper and lower interface distance
Determining module 2 includes three units：Spline interpolation processing unit 21, upper and lower interface distance definition unit 22 and upper and lower interface distance
Computing unit 23.To vector layer line carries out spline interpolation processing to spline interpolation processing unit 21, obtains local relative smooth
Ground layer line；Upper and lower interface distance definition unit 22 by near drill bit point the line transect in layer line setting range and drill bit it is nearest
Distance definition is upper and lower interface distance；Upper and lower interface computing unit 23 obtains drill bit point coordinates and arrives current location to upper and lower interface
Vertical point coordinates, upper and lower interface distance is obtained according to distance calculation formula.In the present embodiment, setting range is preferably
100m, specifically, corresponding calculation formula is：D1=SQRT ((x1-a)2+(y1-b)2), D2=SQRT ((x2-a)2+(y2-b
)2), wherein SQRT is extraction of square root symbol.
It bores to meet when interface distance determining module 3 calculates brill chance interface distance and executes following below scheme：In currently drilling angle of inclination beta
Under, drill bit, which may bore, to be met or lower interface position coordinates point D (x3,y3), specifically, bore meet distance calculating with drill bit point A (a,
B) coordinate is basic point, according to drilling angle of inclination beta currently just, builds linear equation：Y=(x-a) tan β+b judge that the straight line is
It is no to intersect with bound upper thread, if intersection, calculate drill bit and intersection point (x3,y3) distance D3=SQRT ((x3-a)2+(y3-b
)2), and point out intersection is upper interface or lower interface.
It includes three units to bore and meet interface distance determining module 3：Build drill bit point linear equation unit 31, bore meet interface away from
From definition unit 32 and bore chance interface distance computing unit 33.Drill bit point linear equation unit 31 is built using drill bit point coordinates as base
Point built the linear equation of drill bit point according to the drilling inclination angle of acquisition；Brill chance interface distance definition unit 32 first obtains above-mentioned
Intersection point and drill bit point distance definition are that drill bit bores chance interface distance by linear equation and the upper and lower interface intersection point；It bores and meets interface
Metrics calculation unit 33 obtains drill bit point coordinates and above-mentioned intersecting point coordinate, and chance ground may be bored by obtaining drill bit according to distance calculation formula
Layer distance works as D in the present embodiment3When less than preset safety value, alarm is given.
Next, illustrating drill bit front interface apart from determining module 4.The module 4 is being searched whether there is or not when tomography, before searching for drill bit
Stratum in setting range searches whether that the other ground layer line intersected with formation at target locations is searched for before drill bit in the present embodiment
The setting range of tomography is 0-300m, if so, having tomography before determining drill bit, and calculates drill bit distance D between the line4=
SQRT((x4-a)2+(y4-b)2), wherein D4For the preceding stratum of drill bit (including tomography), space coordinate is (x4,y4), if do not had
Have, it is indicated that without tomography.
Drill bit front interface includes three units apart from determining module 4：It is fixed to search fault line unit 41, drill bit front interface distance
Adopted unit 42 and drill bit front interface metrics calculation unit 43.Searching 41 drill bit based on acquisition of fault line unit, currently drilling is inclined
Angle searches for setting range interior ground layer line before drill bit, searches the non-targeted ground layer line intersected with formation at target locations；Drill bit front interface distance
The distance definition that drill bit is reached above-mentioned drill bit non-targeted ground layer line vertical point by definition unit 42 is drill bit front interface distance；Drill bit
Front interface metrics calculation unit 43 obtains coordinate points and above-mentioned vertical point coordinates, and drill bit front interface is obtained according to distance calculation formula
Distance.
Illustrate TRAJECTORY CONTROL module 5 below.As shown in Figure 1, TRAJECTORY CONTROL module 5 includes three units：Bit location is sentenced
Disconnected unit 51 bores and meets interface judging unit 52 and tomography search unit 53.The module 5 is shown the four of above-mentioned acquisition apart from calculated value
Show on stratigraphic section vector model, and following basis for estimation is utilized apart from result of calculation based on four, completes to incline to drill bit drilling
The real-time adjustment at angle.Bit location judgment module 51 first using the arithmetic average at upper and lower interface as bit location judgment threshold,
Upper interface distance is compared with above-mentioned threshold value afterwards, and drill bit is carried out in the position of formation at target locations according to following judgment basis
Judge；Bore chance interface judging unit 52 determines current drill bit with may drilling target using drill bit brill chance interface distance as basis for estimation
The distance of layer, to be adjusted to the size for creeping into inclination angle；Tomography search unit 53 with drill bit front interface distance for judge according to
According to if drill bit front interface distance judges there is tomography in the range, if drill bit front interface distance exists in setting search range
It sets outside search range, then judges in the range without tomography.
It should be noted that judgment basis of the drill bit in formation at target locations present position is as follows：When upper and lower interface is all higher than zero
When, show drill bit in stratum；When upper interface distance is more than bit location judgment threshold, show that drill bit is located at formation at target locations
Lower half portion；When upper interface distance is less than bit location judgment threshold, show that drill bit is located at the top half of formation at target locations.It bores
When head optimum distance is that upper and lower interface is equidistant.
Fig. 5 is the analog result schematic diagram of four distance of calculating of the embodiment of the present application, as shown in figure 5, according to above-mentioned calculating
Method, by calculated upper interface distance D1, lower interface distance D2, bore and meet interface distance D3, drill bit front interface distance D4, display
On two-dimentional stratigraphic section vector model.
It should be noted that it is based on calculated above-mentioned four distance parameter, the foundation as control wellbore trace.Work as D1>0
And D2>When 0, show drill bit in stratum；Set the arithmetic average at upper and lower interface to bit location judgment threshold i.e. (D1+
D2)/2, if D1>(D1+D2)/2 show that drill bit is located at the lower half portion on stratum, otherwise are located at top half；Work as D1=D2When, it is
The optimum position of drill bit.In addition, D3Size reflection drill bit the distance of formation at target locations may be drilled according to current drilling inclination angle,
For reminding construction personnel to notice that destination layer is punched at adjustment drilling inclination angle, prevention, it is ensured that walked in drill bit destination layer, D4For
Construction personnel is reminded to be noticed that whether that there are tomographies and drill bit at a distance from tomography.
Specifically, data as shown in Figure 5 are it is found that D1=2.3m>(D1+D2)/2=1.75m, D3=105.5m shows to bore
Head is located at stratum lower half portion in formation at target locations, and for drill bit not in its optimum position, operating personnel should suitably adjust drilling
Inclination angle；For drill bit currently to creep under inclination angle, the distance that may drill stratum is 105.5m, this shows according to current drilling inclination angle,
It is safe in 105.5 meters to bore and meet interface distance；D4>Without tomography within the scope of 200m, show the nothing within the 300m of search range
Tomography, the tomography in front of drill bit as shown in Figure 5, distance has exceeded the search ranges 300m, therefore not yet detected.
Fig. 6 is a kind of flow diagram of wellbore trace control method of the embodiment of the present application, with reference to Fig. 1, to this
The flow of embodiment method illustrates.Include mainly following steps in short：Stratigraphic section model is built, determination is cutd open
Ground layer line in the graph model of face and path line；Based on stratigraphic section model, interface distance, lower interface distance, brill are calculated separately
Meet interface distance and drill bit front interface distance；The upper interface distance, lower interface distance are shown on stratigraphic section model, are bored and are met
Interface distance and drill bit front interface distance, according to each distance controlling wellbore trace.
Specifically, during building stratigraphic section vector model, first, in accordance with model conversion side as shown in Figure 2
Formula calculates well track floor projection angle based on three dimension strata model, is carried out ground layer line and path line according to the projected angle
Projection forms two dimensional surface side view model, that is, stratigraphic section model, by stratigraphic section model ground layer line and path line carry out
Vectorized process builds stratigraphic section vector model as shown in Figure 3, forms the ground layer line and path line of vector quantization.
Then, the embodiment of the present invention need to be illustrated according to stratum section model according to above-mentioned four distance definition shown in Fig. 4
Figure defines and calculates interface distance, lower interface distance, bores and meet interface distance and drill bit front interface distance.
According to the calculated value of above-mentioned four distance, according still further to the foundation of track control method shown in fig. 5, to drill bit position
It sets and is adjusted, to achieve the purpose that control wellbore trace.
Specifically, the result of calculation based on four distance parameters, and for the control foundation of wellbore trace, will determine that foundation
It is divided into three kinds：Whether upper and lower interface Distance Judgment drill bit is in the optimum position of formation at target locations；It bores chance interface distance and judges drill bit
Whether be in may drill in the safe range of formation at target locations；Whether there is or not tomographies in front of drill bit front interface Distance Judgment drill bit.When upper
State three kinds of situations all be negative evaluation when, drill bit direction without adjustment；Any one of judge when above-mentioned three kinds as affirmative determination
When, operating personnel's reply drill bit currently creeps into inclination angle and is adjusted；When occurring two or two or more in above-mentioned three kinds judge,
Operating personnel should currently creep into drill bit according to comprehensive condition at inclination angle and be adjusted correspondingly.
It should be noted that when the present embodiment judges whether drill bit is in the optimum position of formation at target locations, it should be noted that work as brill
When head is in the optimum position of formation at target locations, shown in Fig. 6, drill bit drilling direction is without adjusting；When drill bit is in target
When the non-optimal position on stratum, need to compare upper interface distance with above-mentioned bit location judgment threshold, no matter comparison result
How, no matter drill bit is in formation at target locations top half or lower half portion, and operating personnel will be according to target residing for current drill bit
Position of stratum is adjusted drill bit drilling direction.
The present invention can utilize computer installation for interface, lower interface, Zuan Yu circle on drill bit relative target layer in real time
The relative distance of face and drill bit front interface is calculated, and process has the characteristics that speed is fast, effect is good, has especially for realization
Effect, accurate, in real time, inexpensive automated drilling provide solution.By the automation calculating to four distances, drilling well is applied
Worker person can adjust drilling inclination angle in time, in case drill bit punches bed boundary, it is ensured that and drill bit is always in the upper and lower interface of stratum
It walks, High-quality Reservoir Drilling ratio is turned up, oil and gas production is turned up.
Those skilled in the art should be understood that each module of the above invention or each step can use general calculating
Device realizes that they can be concentrated on a single computing device, or be distributed in network constituted by multiple computing devices
On, optionally, they can be realized with the program code that computing device can perform, it is thus possible to be stored in storage
It is performed by computing device in device, either they are fabricated to each integrated circuit modules or will be more in them
A module or step are fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and
Software combines.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not limited to the present invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of wellbore trace control method, which is characterized in that the method includes the steps of：
Step 1：Stratigraphic section model is built, determines ground layer line and the path line in section graph model；
Step 2：Based on stratigraphic section model, interface distance, lower interface distance are calculated separately, bores and meets interface distance and drill bit
Front interface distance；
Step 3：Before showing that the upper interface distance, lower interface distance, brill meet interface distance and drill bit on stratigraphic section model
Interface distance, according to each distance controlling wellbore trace.
2. according to the method described in claim 1, which is characterized in that further, in step 1,
The floor projection angle of the track is calculated based on the well track in three dimension strata model；
According to well track floor projection angle, ground layer line and path line are projected, formed under two dimensional surface side view
Ground layer line and path line；
By under the two-dimensional level side view ground layer line and path line carry out vectorized process obtain stratum vector model, by institute
Stratum vector model is stated as the stratigraphic section model.
3. method according to claim 1 or 2, which is characterized in that further, in step 2,
Each distance is calculated by following equation：
Di=SQRT ((xi-a)2+(yi-b)2)
Wherein, i=1,2,3,4；D1Interface distance, D in expression2Indicate lower interface distance, D3It indicates to bore and meets interface distance, D4It indicates
Drill bit front interface distance；(x1,y1) indicate drill bit current location to the coordinate of the vertical point at upper interface, (x2,y2) indicate that drill bit is worked as
Front position is to the coordinate of the vertical point at lower interface, (x3,y3) currently creep into possible drilling strata up or down interface location seat under inclination angle
Mark, (x4,y4) indicate that drill bit reaches the coordinate of the vertical point on the preceding stratum of drill bit；SQRT indicates extraction of square root symbol；(a, b) indicates to bore
Head current position coordinates.
4. method described in any one of claim 1 to 3, which is characterized in that further, in step 2,
Spline interpolation processing is carried out to the ground layer line of stratum section model, forms the smooth ground layer line in part；
With the calculating drill bit point attachment minimum distance of the line transect and drill bit in layer line setting range, as drill bit relative target
The upper interface distance D of layer1With lower interface distance D2。
5. method according to any one of claims 1 to 4, which is characterized in that further, in step 2,
Using drill bit point coordinates as basic point, linear equation is built according to the drilling angle of inclination beta of acquisition；
Judge whether the straight line intersects with the upper parting line or lower parting line, if intersection, calculates to bore and meet interface distance D3, and
Point out the upper and lower interface of intersection.
6. method according to any one of claims 1 to 5, which is characterized in that further, in step 2,
Drill bit based on acquisition currently creeps into angle of inclination beta, search for before drill bit stratum in setting range, searches and intersects with formation at target locations
Other ground layer line；
If so, then there is tomography before drill bit, and calculate formation distance D before drill bit4, if it is not, without tomography.
7. according to method according to any one of claims 1 to 6, which is characterized in that further, in step 3, control is bored
The method following steps of well track：
The upper and lower interface distance is made comparisons with given threshold, judges current drill bit in the position of formation at target locations according to the relationship of the two
It sets, adjustment drill bit creeps into inclination angle；
It determines that drill bit may drill the distance of formation at target locations based on chance interface distance is bored, drilling inclination angle is adjusted；
According in front of drill bit front interface Distance Judgment drill bit, whether there is or not tomography and determination and tomography distances, adjustment drill bit to creep into inclination angle.
8. a kind of wellbore trace control system, which is characterized in that the system comprises the following modules：
Stratigraphic section model construction module builds stratigraphic section model, determines ground layer line and the path line in section graph model；
Four distance calculation modules are based on stratigraphic section model, calculate separately interface distance, lower interface distance, bore and meet interface
Distance and drill bit front interface distance；
TRAJECTORY CONTROL module shows the upper interface distance, lower interface distance on stratigraphic section model, bores and meet interface distance
With drill bit front interface distance, according to each distance controlling wellbore trace.
9. according to the system described in claim 8, which is characterized in that the basis for estimation of the TRAJECTORY CONTROL module is further wrapped
It includes：
Bit location judging unit makes comparisons the upper and lower interface distance with given threshold, is worked as according to the relationship of the two judgement
Preceding drill bit is in the position of formation at target locations；
It bores and meets interface judging unit, meeting interface distance based on the brill determines that drill bit may drill formation at target locations distance；
Tomography search unit, according in front of drill bit front interface Distance Judgment drill bit, whether there is or not tomography and determination and tomography distances.
10. according to the system described in claim 8, which is characterized in that the stratigraphic section model construction module is further wrapped
It includes：
Well track floor projection angle acquiring unit, the level of the track is calculated based on the well track in three dimension strata model
Projected angle；
Two dimensional surface side view construction unit carries out ground layer line and path line according to well track floor projection angle
Projection forms ground layer line and path line under two dimensional surface side view；
Stratigraphic section vector model construction unit, by the ground layer line and path line progress vector under the two dimensional surface side view
Change handles to obtain stratum vector model, using the stratum vector model as the stratigraphic section model.
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