CN104747170B - A kind of magnetic positioning method for determining positive drilling well point of impact on target position - Google Patents

A kind of magnetic positioning method for determining positive drilling well point of impact on target position Download PDF

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CN104747170B
CN104747170B CN201510028388.0A CN201510028388A CN104747170B CN 104747170 B CN104747170 B CN 104747170B CN 201510028388 A CN201510028388 A CN 201510028388A CN 104747170 B CN104747170 B CN 104747170B
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magnetic field
fluxgate
group
magnetic
target position
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CN104747170A (en
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王肄辉
刘海
王小虎
熊陵
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GOALTECH CO Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
    • E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies

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  • Engineering & Computer Science (AREA)
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  • Mining & Mineral Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The invention discloses a kind of magnetic positioning method for determining positive drilling well point of impact on target position, step is：Two groups of fluxgates gather the magnetic field data that positive drilling well point of impact on target position produces simultaneously on the measurement inserting tube of drilling well, and the orientation of two groups of fluxgates is identical and poor with level altitude；Input of the target position magnetic field datas that two groups of fluxgates are gathered as magnetic orientation orientation；Calculate component value when maximum of the magnetic field data in each periodic magnetic field intensity, the minimum value of magnetic field intensity, maximum field strength time-division value and the magnetic field intensity minimum value of every group of fluxgate collection；Magnetic azimuth relation when taking maximum and minimum value according to each periodic magnetic field intensity at every group of fluxgate and target position, obtains target position relative to every group of position coordinates of fluxgate；The coordinate value of target position is determined with reference to the level altitude between two groups of fluxgates.The present invention can accurately and uniquely determine positive drilling well point of impact on target position, and positive drilling well and the distance and orientation between drilling well are detected by the method.

Description

A kind of magnetic positioning method for determining positive drilling well point of impact on target position
Technical field
It is true in more particularly to a kind of drilling process the present invention relates to the technical field of connected well, anti-collision range finding and relief well The magnetic positioning method of fixed positive drilling well point of impact on target position.
Background technology
Oil, ore deposit equal energy source field, drilling engineering is a key link of development of resources.Such as find and confirm Containing structure of oil field, obtain industry stream oil, verify certified oil gas structure containing area and reserves, obtain relevant oil field Geologic information and exploitation data, finally crude oil is got on ground from underground etc., it is difficult not completed by drilling well. With going deep into that In Oil Field Exploration And Development works, the requirement more and more higher to drilling engineering technology, drilling engineering has been developed level The various complex structural wells such as well, extended reach well, multilateral well, connected well, and complex structural well such as directional well input cost is big, fixed Position high precision, requirement higher is proposed to well logging drilling technology, and such as directional well, connected well requires the high precision that hits.
Traditional well logging level only provides the orientation and inclination angle of drilling tool, can not directly provide the relative position of drill bit and target spot Put parameter, it is difficult to avoid error accumulation, thus cannot meet that complex structural well drilling technology is highly reliable, high accuracy guide-localization with And jamproof technical need.Although having been proposed calculating the scheme of positive drilling well point of impact on target position in existing calculating, Because target spot is rotated clockwise one week, its magnetic field intensity occurs two groups of maximums and minimum value in this cycle, therefore The magnetic azimuth of required target spot does not simultaneously have uniqueness, it is difficult to the accurate position for determining target spot, and the position of clearly positive drilling well target spot holds Easily there is the accumulation of error, cause the low defect of precision that hits.
The content of the invention
It is an object of the invention to overcome the shortcoming of prior art with it is not enough, there is provided one kind can accurately and uniquely really The magnetic positioning method of fixed positive drilling well point of impact on target position, positive drilling well and the distance between drilling well and orientation are detected by the method, The position of clearly positive drilling well target spot, and then positive drilling well drilling is instructed, it is finally reached positive drilling well and is connected with drilling well or avoid positive brill The purpose that well is connected with drilling well.
The purpose of the present invention is achieved through the following technical solutions：A kind of magnetic orientation side for determining positive drilling well point of impact on target position Method, comprises the following steps：
Two groups of fluxgates gather the magnetic field that positive drilling well point of impact on target position produces simultaneously on the measurement inserting tube of step 1, drilling well Data；Wherein the orientation of two groups of fluxgates is identical and poor with level altitude on the measurement inserting tube of drilling well；
Step 2, using the target position magnetic field datas of two groups of fluxgates collection in step 1 as magnetic orientation orientation input, And the input according to magnetic orientation orientation calculates maximum of the every group of magnetic field data of fluxgate collection in each periodic magnetic field intensity Component value when value, the minimum value of magnetic field intensity, maximum field strength time-division value and magnetic field intensity minimum value；
Step 3, when taking maximum and minimum value according to each periodic magnetic field intensity at every group of fluxgate and target position Magnetic azimuth Relation acquisition target position relative to every group of position coordinates of fluxgate；
Step 4, according to target position relative to every group of position coordinates of fluxgate, with reference to the fixation between two groups of fluxgates Difference in height determines the final position coordinate of target position.
Preferably, three fluxgates of component are included in every group of fluxgate, wherein every group of three Component of magnetic flux Door is mutually orthogonal two-by-two, and orthogonal direction is respectively X-direction, Y direction and Z-direction, and wherein X-direction is referred to up and down The left and right directions that direction, Y direction refer to, Z-direction is fore-and-aft direction.
Further, the step 3 point of impact on target position leads to relative to the position coordinates (x, y, z) of one of which fluxgate Equation below is crossed to be asked for：
Wherein Bx0, By0 and Bz0 are minimum value of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity During BTmin, during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, X, Y With the magnetic field strength component value of the axles of Z tri-；Wherein Bx1, By1 and Bz1 are this group of magnetic field data of fluxgate collection in each cycle During the maximum BTmax of magnetic field intensity, to three component values of the magnetic field intensity of fluxgate collection in fluxgate should be organized, i.e., most During big magnetic field intensity, the magnetic field strength component value of the axle of X, Y and Z tri-；R is the distance between this group of fluxgate and target spot；θ is the group The angle of line and target spot direction of advance between fluxgate and target spot；When α is the maximum magnetic field strength that this group of fluxgate is obtained The direction in magnetic field and the angle of target spot direction of advance；
Wherein
The step 3 point of impact on target position passes through equation below relative to another group of position coordinates of fluxgate (x ', y ', z ') Asked for：
Wherein Bx0 ', By0 ' and Bz0 ' are minimum of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity During value BTmin ', during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, The magnetic field strength component value of the axle of X, Y and Z tri-；Wherein Bx1 ', By1 ' and Bz1 ' are this group of magnetic field data of fluxgate collection every During the maximum BTmax of individual periodic magnetic field intensity, to three components of the magnetic field intensity of fluxgate collection in fluxgate should be organized When value, i.e. maximum magnetic field strength, the magnetic field strength component value of the axle of X, Y and Z tri-；R ' between this group of fluxgate and target spot away from From；θ ' is the line between this group of fluxgate and target spot and the angle of target spot direction of advance；The maximum that this group of fluxgate of α ' is obtained The angle of the direction in magnetic field and target spot direction of advance during magnetic field intensity；
Wherein
Wherein μ0=4 π * 10-7It is magnetic constant, is a fixed value, m is the magnetic moment of magnetic dipole.
Further, the unique coordinate values of the step 4 point of impact on target position are obtained in the following manner：
Step 4-1, by step 3 obtain target position be updated to following formula relative to the position coordinates of every group of fluxgate In：
Wherein h is that the level altitude of two groups of magnetic field intensities is poor；
Step 4-2, the target position that will meet above-mentioned formula are defined as target spot relative to the position coordinates of every group of fluxgate Final position coordinate.
Further, the magnetic field data in the step 1 after two groups of fluxgate collections is filtered with bandpass filter The input in magnetic orientation orientation is re-used as after ripple.
Because target spot is rotated clockwise one week, its magnetic field intensity occurs two groups of maximums and minimum in this cycle Value, therefore position coordinates (x, y, z) of the target position relative to one of which fluxgate that the inventive method is obtained in step 3 In the presence of two kinds of result (x, y, z)=(a1, b1, c1) and (x, y, z)=(e1, f1, g1), the target position equally obtained relative to Another group of position coordinates of fluxgate (x ', y ', z ') there is also two kinds of result (x ', y ', z ')=(a2, b2, c2) and (x ', y ', Z ')=(e2, f2, g2)；By (x, y, z)=(a1, b1, c1) and (x, y, z)=(e1, f1, g1) in the step of the inventive method 4 When and be updated to the formula of step 4-1 during (x ', y ', z ')=(a2, b2, c2) and (x ', y ', z ')=(e2, f2, g2) respectively In, the result that will meet equation in step 4-1 is corresponding as (x, y, z) and the final result of (x ', y ', z '), i.e. target spot Final position coordinate, to get the unique positions coordinate of target position.
The present invention has the following advantages and effect relative to prior art：
The present invention has level altitude difference by two groups on the measurement inserting tube of drilling well and orientation identical fluxgate is same When gather the magnetic field data that positive drilling well point of impact on target position produces, the magnetic field data gathered according to fluxgate get target position with Two groups of relative position coordinates of fluxgate, then determine the final of target position by the level altitude difference between two groups of fluxgates Unique position coordinates, so as to finally determine the target position in positive drilling well, know positive drilling well and the distance between drilling well and Orientation, the position of clearly positive drilling well, under the scope for not influenceing certainty of measurement, accurately calculates the position of positive drilling well point of impact on target, It is that positive drilling well and drilling well provide theoretical foundation.In petroleum logging system, by being accurately positioned for target spot magnetic azimuth of the present invention Realize the connection of two mouthfuls of wells or avoid connection, improve oil gas well yield and recovery ratio, relief well etc. can also be used as.
Brief description of the drawings
Fig. 1 is the process schematic that the inventive method is the connection of two wells.
Fig. 2 is the two groups of fluxgate position relationship schematic diagrams installed on drilling measuring inserting tube in the inventive method.
Fig. 3 a and 3b are respectively the survey calculation schematic diagrames of each two groups of fluxgates and target spot in the inventive method.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited In this.
Embodiment
Present embodiment discloses a kind of magnetic positioning method for determining positive drilling well point of impact on target position, comprise the following steps：
Step 1, as shown in figure 1, two groups of fluxgates gather drill bit 1 in positive drilling well 4 simultaneously on the measurement inserting tube 2 of drilling well 3 The magnetic field data that produces of magnetic frock (i.e. target position), and the magnetic field number gathered to every group of fluxgate with bandpass filter According to treatment is filtered, it is filtered with to ambient noise.As shown in Fig. 2 installed on the measurement inserting tube 2 of drilling well 3 two Group fluxgate 31,33 has level altitude difference h and orientation is identical；Wherein in the present embodiment three points are included in every group of fluxgate The fluxgate of amount, every group three Component of magnetic flux door it is mutually orthogonal two-by-two, orthogonal direction be respectively X-direction, Y direction and Z-direction, wherein X-direction refer to above-below direction, and the left and right directions that Y direction refers to, Z-direction is fore-and-aft direction.
Step 2, using in step 1 collection of two groups of fluxgates and target position magnetic field data after filtering process as magnetic The input of location fix, and every group of magnetic field data of fluxgate collection is calculated in each cycle according to the input in magnetic orientation orientation When the maximum of magnetic field intensity, the minimum value of magnetic field intensity, maximum field strength time-division value and magnetic field intensity minimum value Component value.
Step 3, when taking maximum and minimum value according to each periodic magnetic field intensity at every group of fluxgate and target position Magnetic azimuth relation, obtain target position relative to every group of position coordinates of fluxgate, specific acquisition process is as follows：
This step point of impact on target position is carried out relative to the position coordinates (x, y, z) of one of which fluxgate by equation below Ask for：
Wherein Bx0, By0 and Bz0 are minimum value of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity During BTmin, during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, X, Y With the magnetic field strength component value of the axles of Z tri-；Wherein Bx1, By1 and Bz1 are this group of magnetic field data of fluxgate collection in each cycle During the maximum BTmax of magnetic field intensity, to three component values of the magnetic field intensity of fluxgate collection in fluxgate should be organized, i.e., most During big magnetic field intensity, the magnetic field strength component value of the axle of X, Y and Z tri-；As shown in Figure 3 a, r refers between this group of fluxgate and target spot Distance, θ is the angle of the line between this group of fluxgate 31 and target spot 32 and target spot direction of advance, and α is obtained for this group of fluxgate 31 The angle of the direction of advance of the direction in magnetic field and target spot during the maximum magnetic field strength for taking, direction of advance such as Fig. 3 a of its point of impact on target 32 In the arrow that sets out of target position shown in；
Wherein
Wherein μ0=4 π * 10-7It is magnetic constant, is a fixed value, m is the magnetic moment of magnetic dipole.
This step point of impact on target position is entered relative to another group of position coordinates of fluxgate (x ', y ', z ') by equation below Row is asked for：
Wherein Bx0 ', By0 ' and Bz0 ' are minimum of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity During value BTmin ', during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, The magnetic field strength component value of the axle of X, Y and Z tri-；Wherein Bx1 ', By1 ' and Bz1 ' are this group of magnetic field data of fluxgate collection every During the maximum BTmax of individual periodic magnetic field intensity, to three components of the magnetic field intensity of fluxgate collection in fluxgate should be organized When value, i.e. maximum magnetic field strength, the magnetic field strength component value of the axle of X, Y and Z tri-；As shown in Figure 3 b, r ' is this group of fluxgate and target The distance between point；θ ' is the line between this group of fluxgate 33 and target spot 32 and the angle of target spot direction of advance；This group of magnetic of α ' The direction in magnetic field and the angle of target spot direction of advance, the direction of advance of its point of impact on target 32 during the maximum magnetic field strength that open gate 33 is obtained As shown in the arrow that the target position in Fig. 3 b sets out.
Wherein
Wherein μ0=4 π * 10-7It is magnetic constant, is a fixed value, m is the magnetic moment of magnetic dipole.
Step 4, according to target position relative to every group of position coordinates of fluxgate, with reference to the fixation between two groups of fluxgates Difference in height determines the coordinate value of target position：
Step 4-1, by step 3 obtain target position be updated to following formula relative to the position coordinates of every group of fluxgate In：
Wherein h is that the level altitude of two groups of magnetic field intensities is poor；
Step 4-2, the target position that will meet above-mentioned formula are defined as target spot relative to the position coordinates of every group of fluxgate Final position coordinate, to determine positive drilling well and the distance between drilling well and orientation, the position of clearly positive drilling well, and then refer to Correcting drilling well is crept into.
Because target spot is rotated clockwise one week, its magnetic field intensity occurs two groups of maximums and minimum in this cycle There are two kinds of results relative to the position coordinates (x, y, z) of one of which fluxgate in value, i.e., the target position obtained in step 3 (x, y, z)=(a1, b1, c1) and (x, y, z)=(e1, f1, g1), the target position equally obtained is relative to another group of fluxgate Position coordinates (x ', y ', z ') there is also two kinds of result (x ', y ', z ')=(a2, b2, c2) and (x ', y ', z ')=(e2, f2, g2)；When in the present embodiment step 4 by (x, y, z)=(a1, b1, c1) and (x, y, z)=(e1, f1, g1) and (x ', y ', z ') It is updated to respectively in the formula of step 4-1 during=(a2, b2, c2) and (x ', y ', z ')=(e2, f2, g2), in meeting step 4-1 The result of equation is corresponding respectively as (x, y, z) and the final position coordinate of the final result of (x ', y ', z '), i.e. target spot, to obtain Get the unique positions coordinate of target position.For example when (x, y, z)=(a1, b1, c1) and (x ', y ', z ')=(a2, b2, When c2) meeting the equation in step 4-1, then target position is defined as relative to the final position coordinate of one of which fluxgate (x, y, z)=(a1, b1, c1), relative to the final position coordinate of another group of fluxgate be defined as (x ', y ', z ')=(a2, b2, c2)。
Two groups of six fluxgates that the present embodiment passes through to have bored on borehole measurement inserting tube align dynamic rotary magnetic couple in drilling well The magnetic field signal of extremely sub (i.e. magnetic frock or target position) is acquired, the analysis by the inventive method to magnetic field signal, just The position of magnetic dipole can uniquely be determined, distance and the side of positive drilling well target spot are just can determine by the position of magnetic dipole Position.By the position of the clearly positive drilling well target spot of the present embodiment method, positive drilling well and the distance between drilling well and orientation are detected, entered And instruct positive drilling well to creep into, and it is finally reached positive drilling well and connects or avoid the purpose that positive drilling well is connected with drilling well with drilling well, carry Oil gas well yield high and recovery ratio, can also be used as relief well etc..
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (5)

1. a kind of magnetic positioning method for determining positive drilling well point of impact on target position, it is characterised in that comprise the following steps：
Two groups of fluxgates gather the magnetic field data that positive drilling well point of impact on target position produces simultaneously on the measurement inserting tube of step 1, drilling well； Wherein the orientation of two groups of fluxgates is identical and poor with level altitude on the measurement inserting tube of drilling well；
Step 2, using the target position magnetic field datas of two groups of fluxgates collection in step 1 as magnetic orientation orientation input, and Input according to magnetic orientation orientation calculates maximum, magnetic of the every group of magnetic field data of fluxgate collection in each periodic magnetic field intensity The component value when minimum value of field intensity, maximum field strength time-division value and magnetic field intensity minimum value；
Step 3, magnetic when taking maximum and minimum value according to each periodic magnetic field intensity at every group of fluxgate and target position Position relation obtains target position relative to every group of position coordinates of fluxgate；
Step 4, according to target position relative to every group of position coordinates of fluxgate, with reference to the level altitude between two groups of fluxgates Difference determines the final position coordinate of target position.
2. the magnetic positioning method for determining positive drilling well point of impact on target position according to claim 1, it is characterised in that described every group Three fluxgates of component are included in fluxgate, wherein every group of mutually orthogonal two-by-two, the orthogonal side of three Component of magnetic flux door To respectively X-direction, Y direction and Z-direction, wherein X-direction refers to above-below direction, the right and left that Y direction refers to To Z-direction is fore-and-aft direction.
3. the magnetic positioning method for determining positive drilling well point of impact on target position according to claim 2, it is characterised in that the step Asked for by equation below relative to the position coordinates (x, y, z) of one of which fluxgate 3 point of impact on target positions：
Wherein Bx0, By0 and Bz0 are minimum value BTmin of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity When, during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, X, Y and Z tri- The magnetic field strength component value of axle；Wherein Bx1, By1 and Bz1 are that the magnetic field data that this group of fluxgate is gathered is strong in each periodic magnetic field During the maximum BTmax of degree, to three component values of the magnetic field intensity of fluxgate collection, i.e. maximum field in fluxgate should be organized During intensity, the magnetic field strength component value of the axle of X, Y and Z tri-；R is the distance between this group of fluxgate and target spot；θ is this group of fluxgate The angle of line and target spot direction of advance and target spot between；α be this group of fluxgate obtain maximum magnetic field strength when magnetic field Direction and the angle of target spot direction of advance；
Wherein
r = μ 0 m 4 π | B T m i n | 3 ;
θ = 1 2 · a r c c o s ( 5 - 2 · ( B T max x B T m i n ) 2 3 ;
α = a r c s i n ( ( B T m a x B T m i n ) 2 - 2 ( B T m a x B T min ) ) ;
The step 3 point of impact on target position is carried out relative to another group of position coordinates of fluxgate (x ', y ', z ') by equation below Ask for：
Wherein Bx0 ', By0 ' and Bz0 ' are minimum value of this group of magnetic field data of fluxgate collection in each periodic magnetic field intensity During BTmin ', during to the component value, i.e. minimum-B configuration intensity that should organize in fluxgate three magnetic field intensities of fluxgate collection, X, The magnetic field strength component value of Y and the axles of Z tri-；Wherein Bx1 ', By1 ' and Bz1 ' are this group of magnetic field data of fluxgate collection at each During the maximum BTmax of periodic magnetic field intensity, to three component values of the magnetic field intensity of fluxgate collection in fluxgate should be organized, I.e. maximum magnetic field strength when, the magnetic field strength component value of the axle of X, Y and Z tri-；R ' is the distance between this group of fluxgate and target spot；θ′ It is the line between this group of fluxgate and target spot and the angle of target spot direction of advance；The maximum magnetic flux field intensity that this group of fluxgate of α ' is obtained The angle of the direction in magnetic field and target spot direction of advance when spending；
Wherein
r ′ = μ 0 m 4 π | B T min ′ | 3 ;
θ ′ = 1 2 · a r c c o s ( 5 - 2 · ( B T max ′ x B T min ′ ) 2 3 ) ;
α ′ = a r c s i n ( ( B T max ′ B T min ′ ) 2 - 2 ( B T max ′ B T min ′ ) ) ;
Wherein μ0=4 π * 10-7It is magnetic constant, is a fixed value, m is the magnetic moment of magnetic dipole.
4. the magnetic positioning method for determining positive drilling well point of impact on target position according to claim 3, it is characterised in that the step The unique coordinate values of 4 point of impact on target positions are obtained in the following manner：
Step 4-1, by step 3 obtain target position be updated to in following formula relative to the position coordinates of every group of fluxgate：
x = x ′ + h y = y ′ z = z ′ ;
Wherein h is that the level altitude of two groups of magnetic field intensities is poor；
Step 4-2, the target position that will meet above-mentioned formula are defined as target spot most relative to the position coordinates of every group of fluxgate Whole position coordinates.
5. the magnetic positioning method for determining positive drilling well point of impact on target position according to claim 3, it is characterised in that the step Magnetic field data in 1 after two groups of fluxgate collections is re-used as the input in magnetic orientation orientation after being filtered with bandpass filter.
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