CN114412356A - Three-dimensional horizontal well track determination method and electronic equipment - Google Patents

Three-dimensional horizontal well track determination method and electronic equipment Download PDF

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CN114412356A
CN114412356A CN202111590800.XA CN202111590800A CN114412356A CN 114412356 A CN114412356 A CN 114412356A CN 202111590800 A CN202111590800 A CN 202111590800A CN 114412356 A CN114412356 A CN 114412356A
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CN114412356B (en
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黄文君
杨振
高德利
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China University of Petroleum Beijing
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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling
    • 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
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract

The specification discloses a three-dimensional horizontal well track determining method and electronic equipment, and relates to the technical field of petroleum and natural gas drilling, wherein the method comprises the following steps: and under the condition that the actual control deviation angle of the torsion azimuth section is equal to the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, determining a first adjusting section track in a second plane by taking the plane of the borehole direction of the current borehole position as the second plane, wherein the starting point of the first adjusting section track is the current borehole position, the end point of the first adjusting section track is positioned on the intersection line of the first plane and the second plane, and the end point of the first adjusting section track is the first tangent point of the first adjusting section track and the first plane. The method breaks through the thinking set that the drilling track is only determined in a two-dimensional plane in the prior art, and after the drilling construction is carried out on the track determined by the method, the actual drilling track is closer to the determined track.

Description

Three-dimensional horizontal well track determination method and electronic equipment
Technical Field
The application relates to the technical field of petroleum and natural gas drilling, in particular to a three-dimensional horizontal well track determining method and electronic equipment.
Background
The horizontal well refers to a well section with an included angle between the axis and the ground of 80-90 degrees. During the drilling of horizontal wells, a vertical well is usually drilled from the surface to the deep part of the formation, and then the vertical well is transited to the horizontal well. During the transition from vertical to horizontal wells, the twisted azimuth section requires the use of a whipstock to change the direction of the wellbore.
The existing horizontal well track determination method, such as a minimum curvature method, a cylindrical spiral method, a natural parameter method, an inclined plane arc method and the like, assumes that a torsion orientation section is a spatial arc section, each point on the spatial arc is in the same spatial plane, and determines the track of the torsion orientation section in the spatial plane.
However, the trajectory determined by the prior trajectory determination methods is typically very different from the wellbore trajectory obtained from actual drilling.
Disclosure of Invention
The embodiment of the application aims to provide a three-dimensional horizontal well track determining method and electronic equipment, so as to solve the problem that an error is easy to occur in the existing three-dimensional horizontal well track determining method.
In order to solve the above technical problem, a first aspect of the present specification provides a method for determining a three-dimensional horizontal well trajectory, including: acquiring a maximum control deviation angle and a minimum build-up rate of a torsion position section, and an actual control deviation angle and an actual build-up rate of a current borehole position; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located; and under the condition that the actual control deviation angle of the torsion azimuth section is equal to the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, determining a first adjusting section track in a second plane by taking the plane of the borehole direction of the current borehole position as the second plane, wherein the starting point of the first adjusting section track is the current borehole position, the end point of the first adjusting section track is positioned on the intersection line of the first plane and the second plane, and the end point of the first adjusting section track is the first tangent point of the first adjusting section track and the first plane.
In some embodiments, the method further comprises: solving the position coordinates of each point on the first adjusting section track; and executing the drilling task of the first adjusting section track according to the position coordinates of each point.
In some embodiments, the first adjusting segment track includes a first arc segment track and a second arc segment track tangent to a second tangent point, centers of circles of the first arc segment track and the second arc segment track are respectively located at two sides of the track, a starting point of the first arc segment track is a starting point of the first adjusting segment track, and an end point of the first arc segment track is the second tangent point; the starting point of the second circular arc segment track is the second tangent point, and the end point of the second circular arc segment track is the end point of the first adjusting segment track.
In some embodiments, solving for the position coordinates of the points on the first adjustment segment trajectory comprises: establishing an XYZ space coordinate system by taking the starting point position of the torsion azimuth section as an origin; determining the intersection point of the second plane and the Z axis under the space coordinate system; and calculating an included angle between the following two line segments according to the actual control deviation angle: a connecting line of the intersection and the current well position and a connecting line of the intersection and a first adjusting section terminal point; calculating the dog leg angle of the first arc track and the dog leg angle of the second arc track according to the included angle; calculating a first straight-line distance between a projection point of the starting point of the torsion azimuth section on the second plane and the current borehole position according to the dog-leg angle of the first arc section track; calculating a second straight line distance between a projection point of the starting point of the torsion orientation section on the second plane and the second tangent point according to the dog leg angle of the second arc section track; and calculating the position coordinate of the second tangent point according to the first straight-line distance and the second straight-line distance.
A second aspect of the present specification provides a method for determining a three-dimensional horizontal well trajectory, including: acquiring a maximum control deviation angle and a minimum control deviation angle of the torsion position section and an actual control deviation angle of the current borehole position; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located; under the condition that the actual control deviation angle of the torsion position section is larger than a preset angle and smaller than the maximum control deviation angle, determining a third arc section track in a second plane, and determining a fourth arc section track in a third plane, wherein the third arc section track and the fourth arc section track are tangent to a third tangent point on an intersection line of the second plane and the third plane; wherein the second plane is a plane in which the borehole direction of the current borehole position is located; the starting point of the third circular arc section orbit is the current borehole position, the end point of the third circular arc section orbit is the third tangent point, the starting point of the fourth circular arc section orbit is the third tangent point, and the end point of the fourth circular arc section orbit is the fourth tangent point of the fourth circular arc section orbit and the first plane.
In some embodiments, the method further comprises: solving the coordinates of each point on the third arc segment track and the fourth arc segment track; and executing the drilling tasks of the third circular arc section orbit and the fourth circular arc section orbit according to the coordinates of the points.
In some embodiments, solving for the coordinates of each point on the third arc segment trajectory and the fourth arc segment trajectory comprises: calculating a dog leg angle of the third arc track and a dog leg angle of the fourth arc track through a sagittal diameter from a torsional azimuth segment starting point to the fourth tangent point, a sagittal diameter from a current borehole position to a torsional azimuth segment starting point, and a sagittal diameter from a current borehole position to the fourth tangent point; deducing a design equation set according to the geometric relationship between the third arc segment and the fourth arc segment; calculating the total dog leg angle of the third arc track and the fourth arc track, the parameter of the third arc and the parameter of the fourth arc according to the dog leg angle of the third arc, the dog leg angle of the fourth arc and the design equation set; and calculating the borehole direction vector of the fourth tangent point, the coordinate of the fourth tangent point, the borehole direction vector of the third tangent point and the coordinate of the third tangent point according to the total dog-leg angle of the third arc segment track and the fourth arc segment track, the parameter of the third arc segment and the parameter of the fourth arc segment.
In some embodiments, the method further comprises: determining a second adjusting section track according to the allowable error of the vertical depth of the target point and the distance from the marking layer to the central line of the target point, wherein the second adjusting section track comprises a stable inclined section, an inclined section and a sliding section, and the tail end of the sliding section enters the target; solving the coordinates of each point on the second adjusting section track; and taking the coordinates of each point as a reference to execute a drilling task.
A third aspect of the present specification provides an electronic apparatus comprising: a memory and a processor, the processor and the memory being communicatively connected to each other, the memory having stored therein computer instructions, the processor implementing the steps of the method according to any of the embodiments of the first or second aspect by executing the computer instructions.
A fourth aspect of the present specification provides a computer storage medium storing computer program instructions which, when executed, implement the steps of the method of any of the embodiments of the first or second aspects.
According to the three-dimensional horizontal well track determining method, in the twisted azimuth section, under the condition that the actual control deviation angle is larger than the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, the plane of the well direction of the current well position is taken as the second plane, the first adjusting section track is determined in the second plane, the starting point of the first adjusting section track is taken as the current well position, the end point is the tangent point on the first plane, so that the well position is twisted back to the first plane, and the well direction is twisted back to the first plane. The track determination method breaks through the thinking set that the drilling track is determined only in a two-dimensional plane in the prior art, and after the drilling construction is carried out on the track determined by the method, the actual drilling track is closer to the determined track.
The three-dimensional horizontal well track determining method aims at the situation that in the torsional azimuth section, under the condition that the actual control deviation angle is larger than 0 and smaller than the maximum control deviation angle, the plane where the borehole direction of the current borehole position is located is taken as the second plane, defining a third arc segment trajectory in the second plane and a fourth arc segment trajectory in the third plane, wherein the starting point of the third arc segment orbit is the current borehole position, the third arc segment orbit and the fourth arc segment orbit are tangent to the third tangent point, the third tangent point is used as the terminal point of the third arc track and the starting point of the fourth arc track, the terminal point of the fourth arc track is tangent to the fourth tangent point with the first plane, and the fourth tangent point is used as the terminal point of the fourth arc track, thereby "twisting" the borehole position back through the second, third planes to the first plane and "twisting" the borehole direction back into the first plane. The track determination method breaks through the thinking set that the drilling track is determined only in a two-dimensional plane in the prior art, and after the drilling construction is carried out on the track determined by the method, the actual drilling track is closer to the determined track.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 shows a plurality of schematic sectional views of a wellbore trajectory during horizontal well trajectory determination;
FIG. 2 shows a schematic of an upper bound track, a middle track, and a lower bound track of a twisted azimuth segment;
FIG. 3 illustrates a flow diagram of one embodiment of a three-dimensional horizontal well trajectory determination method provided herein;
FIG. 4 shows a schematic of a lower bound track of a twisted azimuth segment;
FIG. 5 shows a lower bound trajectory diagram on the O' CN plane of FIG. 4;
FIG. 6 illustrates a flow chart of a method of solving for position coordinates of points on a first adjusted segment track;
FIG. 7 illustrates a flow diagram of another embodiment of a three-dimensional horizontal well trajectory determination method provided herein;
FIG. 8 shows a schematic view of an intermediate track of a twisted azimuth segment;
FIG. 9 illustrates a flowchart of a method of solving for coordinates of points on a third arc segment trajectory and a fourth arc segment trajectory;
FIG. 10 illustrates a flow diagram of yet another embodiment of a three-dimensional horizontal well trajectory determination method provided herein;
FIG. 11 illustrates a flow diagram of yet another embodiment of a three-dimensional horizontal well trajectory determination method provided herein;
FIG. 12 shows a schematic diagram of the pre-target trajectory with indeterminate sag;
fig. 13 is a schematic diagram illustrating an internal structure of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application shall fall within the scope of protection of the present application.
The inventor finds that the difference between the track determined by the conventional track determination method and the well track obtained by actual drilling is large because the difficulty in performing azimuth twisting operation is large due to the well friction moment, the rock debris bed and the like during high well deviation angle in the actual drilling process, so that the deviation of the well deviation angle or the azimuth control of a deflecting tool usually occurs, and the actual well track usually deviates from the original spatial inclined plane during the high well deviation angle azimuth twisting operation.
Based on the above, the inventor proposes a three-dimensional horizontal well track design method described in the specification.
FIG. 1 shows a plurality of schematic sectional views of a wellbore trajectory during horizontal well trajectory determination. Wherein,01 is a straight well section, and the inclination angle and the azimuth angle of the section are both 0; 12 is an deflecting section with an azimuth angle of 0 and a well-oblique angle of alpha1Waiting for solving; the 23 section is a first steady-slope section, the azimuth angle of the section is 0, and the length L of the section is23And angle of inclination alpha1Waiting for solving; 34 sections are torsional azimuth sections, the azimuth angle of the section is the azimuth angle of the target point, and the well angle alpha of the section2Waiting for solving; the 45 section is a second steady-slope section, the azimuth angle of the section is the azimuth angle of the target point, the well-head angle of the section is the well-head angle of the target point, and the length L45And (5) waiting for solving. E in FIG. 1 represents a target point.
The XOZ plane in FIG. 1 is the plane of the borehole trajectory before the location of the start point 3 of the torsional azimuth segment, and segment 45 is also located in the XOZ plane. The control deviation angle in the present application refers to an included angle between the borehole direction of the current borehole position and the XOZ plane. An actual control deviation angle, which is a control deviation angle determined by an actual drilling scenario; the maximum control deviation angle refers to the maximum control deviation angle that can be achieved in an actual drilling scenario.
In fig. 2, 3A' C4 is the torsional azimuth trajectory, i.e., the upper bound trajectory, for the case where the actual control deviation angle is equal to 0 (i.e., the wellbore trajectory does not deviate from the XOZ plane); 3AC4 is the orbit of the torsional azimuth section, i.e. the lower bound orbit, when the actual control deviation angle is at its maximum. In an actual drilling scenario, the trajectory of the twisted azimuth section is typically between an upper bound trajectory and a lower bound trajectory, which may also be referred to as an intermediate trajectory, such as OA "QC" C shown in FIG. 2.
The method for determining the three-dimensional horizontal well orbit provided by the specification provides a solving method for the lower bound orbit and the middle orbit.
The specification provides a method for determining a three-dimensional horizontal well orbit, which can be used for solving the lower bound orbit. As shown in fig. 3, the method comprises the following steps:
s310: and acquiring the maximum control deviation angle and the minimum build-up rate of the torsion position section, and the actual control deviation angle and the actual build-up rate of the current borehole position.
The current wellbore location is a wellbore location in the twisted azimuth section. The position of the borehole in the twisted position section under the actual drilling scene can be specifically the position of one end of the stand column, which is far away from the starting point of the twisted position section, after a first stand column of the twisted position section is put into the well, or the position of one end of the last stand column, which is far away from the starting point of the twisted position section, after a plurality of stand columns are put into the well; it may also refer to a wellbore location in the torsional section being planned during the track design phase.
The actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the start point of the torsional azimuth section is located.
S320: and under the condition that the actual control deviation angle of the torsion azimuth section is equal to the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, determining a first adjusting section track in a second plane by taking the plane of the borehole direction of the current borehole position as the second plane, wherein the starting point of the first adjusting section track is the current borehole position, the end point of the first adjusting section track is positioned on the intersection line of the first plane and the second plane, and the end point of the first adjusting section track is the first tangent point of the first adjusting section track and the first plane.
As shown in fig. 4 and 5, ABC is the first adjustment trajectory, where a is the current borehole position, O' CN is the second plane, XOZ is the first plane, and C is the tangent point of the first adjustment trajectory and the XOZ plane.
In some embodiments, the first adjusting segment track includes a first arc segment track and a second arc segment track tangent to the second tangent point, the circle centers of the first arc segment track and the second arc segment track are respectively located at two sides of the track, the starting point of the first arc segment track is the starting point of the first adjusting segment track, and the end point of the first arc segment track is the second tangent point; the starting point of the second circular arc section track is a second tangent point, and the end point of the second circular arc section track is the end point of the first adjusting section track.
For example, as shown in fig. 5, ABC is a first adjustment segment trajectory, AB is a first arc segment trajectory, BC is a second arc segment trajectory, and the arcs AB and BC are tangent to the point B.
After step S320, the position coordinates of each point on the first adjustment segment trajectory are also typically solved, and the drilling task for the first adjustment segment trajectory is performed based on the position coordinates of each point.
As shown in fig. 4, solving for the location coordinates of the points in the ABC segment emphasizes solving for the borehole coordinates of A, B, C three points.
In some embodiments, as shown in FIG. 6, solving for the position coordinates of the points on the first adjustment segment track may include the steps of:
s610: and establishing an XYZ space coordinate system by taking the starting point position of the torsion azimuth segment as an origin.
As shown in fig. 4, point O is the position shown at 3 in fig. 1.
The XYZ spatial coordinate system shown in fig. 4 may be established by rotating the X, Z axis around the Y axis by α while keeping the Y axis unchanged.
S620: and determining the intersection point of the second plane and the Z axis under the space coordinate system.
As shown in fig. 4, the intersection point is the O' point on the Z-axis.
S630: and calculating an included angle between the following two line segments according to the actual control deviation angle: the intersection point is connected with the current borehole position, and the intersection point is connected with the terminal point of the first adjusting section.
As shown in fig. 4, i.e. calculating ═ CO 'N ═ θ'.
S640: and calculating the dog leg angle of the first arc track and the dog leg angle of the second arc track according to the included angle.
As shown in fig. 5, from ═ CO ' N ═ θ ', the dog leg angle β of arc AB and the dog leg angle β — θ ' of arc BC are calculated.
S650: and calculating a first straight line distance from a projection point of the starting point of the torsion azimuth section on the second plane to the current borehole position according to the dog-leg angle of the first arc section orbit.
As shown in fig. 5, the straight-line distance of O' a is calculated from the dog-leg angle β of the arc AB. Wherein, O' is the projection of the starting point O of the torsion azimuth segment on the second plane.
S660: and calculating a second straight line distance from the projection point of the starting point of the torsion orientation section on the second plane to the second tangent point according to the dog leg angle of the second arc section track.
As shown in fig. 5, i.e., the dog-leg angle β - θ 'of the arc BC, the straight-line distance of O' B is calculated.
S670: and calculating the position coordinate of the second tangent point according to the first straight-line distance and the second straight-line distance.
As shown in fig. 5, the position coordinates of the second tangent point B are calculated from the straight-line distance of O 'a and the straight-line distance of O' B. The calculation method is a pure geometric calculation, which can be calculated by a person skilled in the art, and is not specifically described in the present application.
In some embodiments, a maximum control deviation angle and a minimum control deviation angle for a tortional position section, an actual control deviation angle for a current wellbore location are obtained; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located;
under the condition that the actual control deviation angle of the torsion position section is larger than a preset angle and smaller than the maximum control deviation angle, determining a third arc section track in a second plane, and determining a fourth arc section track in a third plane, wherein the third arc section track and the fourth arc section track are tangent to a third tangent point on an intersection line of the second plane and the third plane; wherein the second plane is a plane in which the borehole direction of the current borehole position is located; the starting point of the third circular arc section orbit is the current borehole position, the end point of the third circular arc section orbit is the third tangent point, the starting point of the fourth circular arc section orbit is the third tangent point, and the end point of the fourth circular arc section orbit is the fourth tangent point of the fourth circular arc section orbit and the first plane.
According to the three-dimensional horizontal well track determining method, in the twisted azimuth section, under the condition that the actual control deviation angle is larger than the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, the plane of the well direction of the current well position is taken as the second plane, the first adjusting section track is determined in the second plane, the starting point of the first adjusting section track is taken as the current well position, the end point is the tangent point on the first plane, so that the well position is twisted back to the first plane, and the well direction is twisted back to the first plane. The track determination method breaks through the thinking set that the drilling track is determined only in a two-dimensional plane in the prior art, and after the drilling construction is carried out on the track determined by the method, the actual drilling track is closer to the determined track.
The specification provides a three-dimensional horizontal well track determination method which can be used for solving the intermediate track. As shown in fig. 7, the method comprises the following steps:
s710: and acquiring the maximum control deviation angle and the minimum control deviation angle of the torsion position section and the actual control deviation angle of the current borehole position.
The current wellbore location is a wellbore location in the twisted azimuth section. The position of the borehole in the twisted position section under the actual drilling scene can be specifically the position of one end of the stand column, which is far away from the starting point of the twisted position section, after a first stand column of the twisted position section is put into the well, or the position of one end of the last stand column, which is far away from the starting point of the twisted position section, after a plurality of stand columns are put into the well; it may also refer to a wellbore location in the torsional section being planned during the track design phase.
The actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the start point of the torsional azimuth section is located.
The preset angle may be 0, or 0.2, 0.5, 1, 5, 10, etc. close to 0.
S720: under the condition that the actual control deviation angle of the torsion position section is larger than the preset angle and smaller than the maximum control deviation angle, determining a third arc section track in the second plane, and determining a fourth arc section track in the third plane, wherein the third arc section track and the fourth arc section track are tangent to a third tangent point on the intersection line of the second plane and the third plane; the second plane is a plane where the borehole direction of the current borehole position is located; the starting point of the third circular arc section track is the current borehole position, the end point of the third circular arc section track is a third tangent point, the starting point of the fourth circular arc section track is a third tangent point, and the end point of the fourth circular arc section track is a fourth tangent point of the fourth circular arc section track and the first plane.
As shown in fig. 8, the arc a "Q" represents a third arc segment track, the arc QC "represents a fourth arc segment track, the plane represented by the upper parallelogram in fig. 8 is the second plane where the arc a" Q "is located, the plane represented by the lower parallelogram in fig. 8 is the third plane where the arc QC" is located, and the third tangent point Q is located on the intersection line of the second plane and the third plane. The tangent point of the arc QC 'and the first plane is C'.
After step S720, the coordinates of each point on the third arc segment trajectory and the fourth arc segment trajectory are also typically solved, and the drilling task for the first adjustment segment trajectory is performed based on the coordinates of each point.
In some embodiments, the coordinates of each point on the third circular arc segment orbit and the fourth circular arc segment orbit can be solved by using a vector method. For example, as shown in fig. 9, solving the coordinates of each point on the third arc segment track and the fourth arc segment track may include the following steps:
s910: and calculating the dog-leg angle of the third arc track and the dog-leg angle of the fourth arc track through the sagittal diameter from the starting point of the torsional azimuth section to the fourth tangent point, the sagittal diameter from the current borehole position to the starting point of the torsional azimuth section, and the sagittal diameter from the current borehole position to the fourth tangent point.
S920: and deducing a design equation set according to the geometric relationship between the third arc segment and the fourth arc segment.
S930: and calculating the total dog leg angle of the third arc section track and the fourth arc section track, the parameters of the third arc section and the parameters of the fourth arc section according to the dog leg angle of the third arc section, the dog leg angle of the fourth arc section and a design equation set.
S940: and calculating the borehole direction vector of the fourth tangent point, the coordinate of the fourth tangent point, the borehole direction vector of the third tangent point and the coordinate of the third tangent point according to the total dog-leg angle of the third arc segment orbit and the fourth arc segment orbit, the parameter of the third arc segment and the parameter of the fourth arc segment.
Specifically, with rOC”、rA”O、rA”C”Respectively representing the radial dimensions, t, of the vectors OC ", A" O, A "CO、tC”The borehole direction vectors representing points O and C ", respectively, in conjunction with FIG. 8, may be derived from the geometric relationship:
Figure BDA0003429029390000081
wherein epsilon is the total dog-leg angle of the third arc track and the fourth arc track, nOIs the vector of the main normal direction of the point O, and R is the curvature radius of the space circular arc section of the whole track of the torsion azimuth section.
Figure BDA0003429029390000082
At theta1Dog leg angle representing orbit of third arc segment in theta2Dog leg angle, t, representing the fourth arc segment orbitQThe borehole direction vector representing point Q, then derived geometrically by differentiation, can yield:
rA”C”＝LmtA”+(Lm+Ln)tQ+LntC”——(2)
cosθ1＝tA”tQ——(3)
cosθ2＝tC”tQ——(4)
according to the above formula (3), can be obtained
Figure BDA0003429029390000091
And substituting the obtained product into (2) to obtain:
Figure BDA0003429029390000092
similarly, the same operation is performed on the above formula (4), and the following results are obtained:
Figure BDA0003429029390000093
squaring both ends of the above formula (2) can yield:
Figure BDA0003429029390000094
the formula of the double angle is as follows:
Figure BDA0003429029390000095
with LmRepresents the length of the tangent line segment of the arc A 'Q at the tangent point A' in LnRepresents the length of a tangent line segment of the arc QC' at a tangent point Q, represents the build rate by K,
Figure BDA0003429029390000096
then from the geometric relationship one can get:
Figure BDA0003429029390000097
the formula of the angle of twice is substituted into the formula,
Figure BDA0003429029390000098
Figure BDA0003429029390000099
the formula of the angle of twice is substituted into the formula,
Figure BDA00034290293900000910
combining the above formulas (5), (6), (7), (8) and (9), and finishing to obtain a design equation set as follows:
Figure BDA0003429029390000101
according to the geometrical relationship, the following equation is also provided:
Figure BDA0003429029390000102
Figure BDA0003429029390000103
based on the above equations (11) and (12), the design equation set in (10) can be solved to obtain ε, Lm、LnThe numerical value of (c). On the basis, the coordinates of the third tangent point Q and the coordinates of the fourth tangent point C' can be obtained, and then the parameters of the whole track are solved.
Wherein, according to the value of epsilon, the arc length of the arc OC' can be obtained as follows:
Figure BDA0003429029390000104
the coordinates of the fourth tangent point C ″ can be further found by the triangle corner relationship.
According to Lm、LnThe length of the third arc segment orbit a "Q can be found as follows:
Figure BDA0003429029390000105
the length of the fourth arc section track QC' is as follows:
Figure BDA0003429029390000106
thus, the coordinates of the point Q and the borehole direction vector can be obtained.
On the basis of solving to obtain the coordinates of the key points and the borehole direction vectors, the coordinates and the borehole direction vectors of the remaining points can be further obtained by the existing method (for example, the minimum curvature method), which can be performed by those skilled in the art, and this is not specifically described in this application.
In some embodiments, a maximum control deviation angle and a minimum build rate for a tortional position section, an actual control deviation angle and an actual build rate for a current wellbore location are obtained; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located;
under the condition that the actual control deviation angle of the torsion azimuth section is equal to the maximum control deviation angle and the actual build rate is equal to the minimum build rate, determining a first adjusting section track in a second plane by taking the plane of the borehole direction of the current borehole position as the second plane, wherein the starting point of the first adjusting section track is the current borehole position, the end point of the first adjusting section track is located on the intersection line of the first plane and the second plane, and the end point of the first adjusting section track is the first tangent point of the first adjusting section track and the first plane;
the three-dimensional horizontal well track determining method aims at the situation that in the torsional azimuth section, under the condition that the actual control deviation angle is larger than 0 and smaller than the maximum control deviation angle, the plane where the borehole direction of the current borehole position is located is taken as the second plane, defining a third arc segment trajectory in the second plane and a fourth arc segment trajectory in the third plane, wherein the starting point of the third arc segment orbit is the current borehole position, the third arc segment orbit and the fourth arc segment orbit are tangent to the third tangent point, the third tangent point is used as the terminal point of the third arc track and the starting point of the fourth arc track, the terminal point of the fourth arc track is tangent to the fourth tangent point with the first plane, and the fourth tangent point is used as the terminal point of the fourth arc track, thereby "twisting" the borehole position back through the second, third planes to the first plane and "twisting" the borehole direction back into the first plane. The track determination method breaks through the thinking set that the drilling track is determined only in a two-dimensional plane in the prior art, and after the drilling construction is carried out on the track determined by the method, the actual drilling track is closer to the determined track.
In the geological exploration process, the depth of a target window center is generally predicted according to logging information, but under the condition of large depth and large displacement, even if the prediction precision is higher, a certain error exists between the target window center and an actual window center, and if the error value is greater than the height of the window center, miss-targeting is easily caused.
For this purpose, as shown in fig. 10 and 11, after the three-dimensional horizontal well trajectory determination method shown in fig. 3 and 7, the following steps are further included:
s10: and determining a second adjusting section track according to the allowable error of the vertical depth of the target point and the distance from the marking layer to the central line of the target point, wherein the second adjusting section track sequentially comprises a steady inclined section, a deflecting section and a sliding section, and the tail end of the sliding section enters the target.
S20: and solving the coordinates of each point on the second adjusting section track.
S30: and taking the coordinates of each point as a reference to execute a drilling task.
A target for horizontal drilling refers to a section of a cylinder that is horizontal at a predetermined depth in the formation. Horizontal here means that the axis of the cylinder is at an angle of 80 ° to 90 ° to the ground. The axis of the cylinder is also referred to as the target centerline.
The target point is vertical and deep, and the vertical distance from the central line of the target point to the ground is referred to. Because the target point is a preset target in the stratum, the vertical depth of the target point is estimated in advance according to various logging data, namely the logging data are accurate, the estimation method is accurate, the estimated vertical depth of the target point has certain deviation with the actual vertical depth, for example, the deviation of the vertical depth is +/-5 m, and the deviation is the tolerance error of the estimated vertical depth.
The marking layer is a geological layer (such as a shale layer) selected from the upper layer of the target point depth according to geological exploration results and used for determining whether the target point is close to in the actual drilling process.
The stable inclination section refers to a section of track with unchanged well inclination angle and azimuth angle.
The deflecting section is a section of track with variable well inclination angle and azimuth angle.
The glide section is a section of track with a well inclination angle equal to a target point well inclination angle, an azimuth angle equal to a target point azimuth angle and a tail end entering a target.
As shown in fig. 12, 45MPE is the second adjusting section track, where 45M section is the steady-slope section (i.e., the second steady-slope section in fig. 1), MP section is the deflecting section, and PE section is the gliding section. Wherein E is the target position.
According to the three-dimensional horizontal well track determining method shown in fig. 10 and 11, under the condition that the vertical depth of the target point is uncertain, an optimal track comprising a steady slope section, a deflecting section and a sliding section is determined according to the allowable error of the vertical depth of the target point and the distance from the marking layer to the central line of the target point, and when the optimal track is used as a reference to execute a drilling task, no matter the actual position of the target point is located at the upper layer or the lower layer of the expected vertical depth, the target can be entered during actual drilling, and the risk of target miss is reduced.
Specifically, as shown in FIG. 12, the expected location of the target point is point E, HEFor the corresponding expected sag, Δ D is the sag error. When the actual position of the target point is positioned at the top of the expected vertical depth, namely positioned at E ', the target can be entered according to the upper bound orbit of M ' P ' E ', namely, when the inclined section reaches M ', the inclined section starts to be inclined, and after the inclined section M ' P ', the target is entered through the sliding of the section P ' E '; when the actual position of the target point is located at the lowest part of the expected vertical depth, namely E ', the target can be entered according to the lower boundary track of M ' E ', namely, after the steady-inclination section M ' MM ', the deflection is started, and the deflecting section is directly entered into the target. It can be seen that the actual drilling can be into the target when the actual position of the target point is anywhere between E' and E ".
In some embodiments, step S20 includes the steps of:
s21: and calculating the stable inclination angle of the stable inclination section according to the distance from the mark layer to the central line of the target point, the target point well inclination angle and the curvature radius of the spatial arc section of the deflecting section.
In particular, the amount of the solvent to be used,
Figure BDA0003429029390000121
wherein alpha isoptAngle of inclination, α, being a section of inclinationEAnd D, taking the target well inclination angle, delta is the distance from the mark layer to the central line of the target, and R is the curvature radius of the space circular arc section of the deflecting section. Wherein,
Figure BDA0003429029390000122
k is the build rate.
S22: and calculating the length of the steady inclined section and the length of the sliding section according to the allowable error of the vertical depth of the target point, the target point well inclination angle and the well inclination angle of the steady inclined section.
In particular, the amount of the solvent to be used,
Figure BDA0003429029390000123
wherein L isM'MLength of steady slope, LPEFor the length of the glide section, Δ H is the tolerance of the target vertical depth, αEAngle of well at target point, alphaoptIs a stable angle of the stable oblique section.
An embodiment of the present invention further provides an electronic device, as shown in fig. 13, the electronic device may include a processor 1301 and a memory 1302, where the processor 1301 and the memory 1302 may be connected through a bus or in another manner, and fig. 13 illustrates an example of connection through a bus.
Processor 1301 may be a Central Processing Unit (CPU). The Processor 1301 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 1302, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the three-dimensional horizontal well trajectory determination method in the embodiment of the present invention. The processor 1301 executes various functional applications and data classification of the processor by running non-transitory software programs, instructions and modules stored in the memory 1302, so as to implement the three-dimensional horizontal well trajectory determination method in the above method embodiment.
The memory 1302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 1301, and the like. Further, memory 1302 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 1302 may optionally include memory located remotely from processor 1301, which may be connected to processor 1301 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 1302 and, when executed by the processor 1301, perform a method for determining a three-dimensional horizontal well trajectory as in the embodiments shown in fig. 1 to 3.
The details of the electronic device can be understood with reference to the descriptions and effects in the embodiments corresponding to fig. 3, fig. 6, fig. 7, fig. 9, fig. 10, and fig. 11, which are not repeated herein.
It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A three-dimensional horizontal well track determination method is characterized by comprising the following steps:
acquiring a maximum control deviation angle and a minimum build-up rate of a torsion position section, and an actual control deviation angle and an actual build-up rate of a current borehole position; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located;
and under the condition that the actual control deviation angle of the torsion azimuth section is equal to the maximum control deviation angle and the actual build-up rate is equal to the minimum build-up rate, determining a first adjusting section track in a second plane by taking the plane of the borehole direction of the current borehole position as the second plane, wherein the starting point of the first adjusting section track is the current borehole position, the end point of the first adjusting section track is positioned on the intersection line of the first plane and the second plane, and the end point of the first adjusting section track is the first tangent point of the first adjusting section track and the first plane.
2. The method of claim 1, further comprising:
solving the position coordinates of each point on the first adjusting section track;
and executing the drilling task of the first adjusting section track according to the position coordinates of each point.
3. The method according to claim 1, wherein the first adjustment segment track comprises a first arc segment track and a second arc segment track tangent to a second tangent point, the circle centers of the first arc segment track and the second arc segment track are respectively located at two sides of the track, the starting point of the first arc segment track is the starting point of the first adjustment segment track, and the end point of the first arc segment track is the second tangent point; the starting point of the second circular arc segment track is the second tangent point, and the end point of the second circular arc segment track is the end point of the first adjusting segment track.
4. The method of claim 3, wherein solving for the position coordinates of the points on the first adjusted segment trajectory comprises:
establishing an XYZ space coordinate system by taking the starting point position of the torsion azimuth section as an origin;
determining the intersection point of the second plane and the Z axis under the space coordinate system;
and calculating an included angle between the following two line segments according to the actual control deviation angle: a connecting line of the intersection and the current well position and a connecting line of the intersection and a first adjusting section terminal point;
calculating the dog leg angle of the first arc track and the dog leg angle of the second arc track according to the included angle;
calculating a first straight-line distance between a projection point of the starting point of the torsion azimuth section on the second plane and the current borehole position according to the dog-leg angle of the first arc section track;
calculating a second straight line distance between a projection point of the starting point of the torsion orientation section on the second plane and the second tangent point according to the dog leg angle of the second arc section track;
and calculating the position coordinate of the second tangent point according to the first straight-line distance and the second straight-line distance.
5. A three-dimensional horizontal well track determination method is characterized by comprising the following steps:
acquiring a maximum control deviation angle and a minimum control deviation angle of the torsion position section and an actual control deviation angle of the current borehole position; the actual control deviation angle is an included angle between the borehole direction of the current borehole position and a first plane, wherein the first plane is a plane where the borehole trajectory before the starting point of the torsional azimuth section is located;
under the condition that the actual control deviation angle of the torsion position section is larger than a preset angle and smaller than the maximum control deviation angle, determining a third arc section track in a second plane, and determining a fourth arc section track in a third plane, wherein the third arc section track and the fourth arc section track are tangent to a third tangent point on an intersection line of the second plane and the third plane; wherein the second plane is a plane in which the borehole direction of the current borehole position is located; the starting point of the third circular arc section orbit is the current borehole position, the end point of the third circular arc section orbit is the third tangent point, the starting point of the fourth circular arc section orbit is the third tangent point, and the end point of the fourth circular arc section orbit is the fourth tangent point of the fourth circular arc section orbit and the first plane.
6. The method of claim 5, further comprising:
solving the coordinates of each point on the third arc segment track and the fourth arc segment track;
and executing the drilling tasks of the third circular arc section orbit and the fourth circular arc section orbit according to the coordinates of the points.
7. The method of claim 6, wherein solving for coordinates of points on the third arc segment trajectory and the fourth arc segment trajectory comprises:
calculating a dog leg angle of the third arc track and a dog leg angle of the fourth arc track through a sagittal diameter from a torsional azimuth segment starting point to the fourth tangent point, a sagittal diameter from a current borehole position to a torsional azimuth segment starting point, and a sagittal diameter from a current borehole position to the fourth tangent point;
deducing a design equation set according to the geometric relationship between the third arc segment and the fourth arc segment;
calculating the total dog leg angle of the third arc track and the fourth arc track, the parameter of the third arc and the parameter of the fourth arc according to the dog leg angle of the third arc, the dog leg angle of the fourth arc and the design equation set;
and calculating the borehole direction vector of the fourth tangent point, the coordinate of the fourth tangent point, the borehole direction vector of the third tangent point and the coordinate of the third tangent point according to the total dog-leg angle of the third arc segment track and the fourth arc segment track, the parameter of the third arc segment and the parameter of the fourth arc segment.
8. The method of claim 1 or 5, further comprising:
determining a second adjusting section track according to the allowable error of the vertical depth of the target point and the distance from the marking layer to the central line of the target point, wherein the second adjusting section track comprises a stable inclined section, an inclined section and a sliding section, and the tail end of the sliding section enters the target;
solving the coordinates of each point on the second adjusting section track;
and taking the coordinates of each point as a reference to execute a drilling task.
9. An electronic device, comprising:
a memory and a processor, the processor and the memory being communicatively connected to each other, the memory having stored therein computer instructions, the processor implementing the steps of the method of any one of claims 1 to 8 by executing the computer instructions.
10. A computer storage medium storing computer program instructions which, when executed, implement the steps of the method of any one of claims 1 to 8.
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CN112983389A (en) * 2021-03-12 2021-06-18 中国石油天然气股份有限公司 Method for designing double two-dimensional combined three-dimensional horizontal well track

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030056381A1 (en) * 1997-02-07 2003-03-27 James Brosnahan Survey apparatus and methods for directional wellbore surveying
CN107762411A (en) * 2017-12-05 2018-03-06 重庆科技学院 Continuous pipe well drilling rail method for correcting error
CN110069796A (en) * 2018-01-23 2019-07-30 中石化石油工程技术服务有限公司 A kind of three-dimensional horizontal well wellbore rail design method
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