CN115263184A - Method and device for regulating and controlling drilling direction - Google Patents
Method and device for regulating and controlling drilling direction Download PDFInfo
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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
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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
- 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
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The application provides a method and a device for regulating and controlling a drilling direction, wherein the method comprises the following steps: the method comprises the steps of obtaining the content of first stratum rock debris drilled by a drilling machine and the footage of the drilling machine drilled into a second stratum in the process that the drilling machine drills into the second stratum from a first stratum of a target well, determining a target included angle according to the content, the hole diameter and the footage of the target well, determining a stratum view inclined angle according to a well deviation angle and the target included angle of the target well, and regulating and controlling the drilling direction of the drilling machine according to the stratum view inclined angle. According to the method and the device, the formation view dip angle can be obtained more quickly and accurately, and then the drilling direction can be regulated and controlled more accurately in real time.
Description
Technical Field
The application relates to the technical field of oilfield development, in particular to a method and a device for regulating and controlling a drilling direction.
Background
The formation dip angle well logging is a method for measuring the formation dip angle and inclination in a borehole, and the formation dip angle well logging information can be used for researching geological structures and deposition environments, so that the distribution condition of underground oil gas is tracked, and the method has an important role in guiding the exploration and development of oil gas fields.
At present, a formation inclination angle logging instrument is put into a well through a cable to measure a formation inclination angle, but a probe of the formation inclination angle logging instrument is difficult to enter a horizontal well section or a highly-inclined well section, the obtained formation inclination angle is not accurate enough, and further the obtained formation apparent inclination angle is not accurate enough, so that the drilling direction cannot be accurately regulated.
Disclosure of Invention
The application provides a method and a device for regulating and controlling a drilling direction, and aims to solve the problems that a stratigraphic dip angle obtained by a stratigraphic dip logging instrument on a horizontal well section or a highly-inclined well section is not accurate enough, and further, an obtained stratigraphic dip angle is not accurate enough, so that the drilling direction cannot be regulated and controlled accurately.
In a first aspect, the present application provides a method for regulating a drilling direction, comprising:
in the process that the drilling machine drills into a second stratum from a first stratum of a target well, acquiring the content of first stratum rock debris drilled by the drilling machine and the drilling footage of the drilling machine which drills into the second stratum;
determining a target included angle according to the content, the borehole diameter and the footage of the target well, wherein the target included angle is used for representing an included angle between the drilling direction and an interface of the first stratum and the second stratum;
determining a stratum apparent dip angle according to the well inclination angle and the target included angle of the target well;
and regulating and controlling the drilling direction of the drilling machine according to the stratum apparent dip angle.
Optionally, determining a target included angle according to the content, the borehole diameter of the target well and the footage, including: determining a target height according to the content and the well diameter of the target well, wherein the target height is used for representing the fan height corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to the drilling position of the drilling machine for drilling into the second stratum; and determining a target included angle according to the target height and the footage.
Optionally, determining the target height according to the content and the well diameter of the target well, including: determining a bow angle corresponding to a second stratum according to a first formula, wherein the bow angle is used for representing a bow angle corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to a drilling position of the drilling machine drilling into the second stratum; and determining the target height according to the bow angle and the well diameter of the target well.
x% = sin (a)/(2 π) -a/360+1 equation one
Wherein x% represents the content and a represents the corresponding bow angle of the second formation.
Optionally, determining the target height according to the bow-arc angle and the borehole diameter of the target well, includes: determining the target height according to the following formula two:
wherein D represents the target height and D represents the borehole diameter of the target well.
Optionally, determining a target included angle according to the target height and the footage includes: determining a target included angle according to the following formula III:
equation III for symbol beta = atan (d/h)
Wherein, the angle beta represents a target included angle, and h represents footage.
Optionally, determining the formation dip angle according to the well dip angle of the target well and the target included angle includes: if the well inclination angle is less than 90 degrees, determining the apparent dip angle of the stratum according to the following formula four:
the formula IV for shielding δ =90 ° -shielding alpha-shielding beta
Wherein, the angle delta represents a stratum apparent dip angle, and the angle alpha represents a well dip angle;
or if the well inclination angle is larger than 90 degrees, determining the apparent dip angle of the stratum according to the following formula five:
the formula five of angle delta =anglealpha-90 deg.
In a second aspect, the present application provides a device for controlling a drilling direction, comprising:
the acquisition module is used for acquiring the content of the first stratum cuttings drilled by the drilling machine and the drilling footage of the drilling machine into the second stratum in the process that the drilling machine drills into the second stratum from the first stratum of the target well;
the determining module is used for determining a target included angle according to the content, the well diameter and the footage of the target well, wherein the target included angle is used for representing an included angle between the drilling direction and an interface of the first stratum and the second stratum;
the processing module is used for determining the formation apparent dip angle according to the well dip angle and the target included angle of the target well;
and the regulating and controlling module is used for regulating and controlling the drilling direction of the drilling machine according to the stratum apparent dip angle.
Optionally, the determining module is specifically configured to: determining a target height according to the content and the well diameter of the target well, wherein the target height is used for representing the fan height corresponding to the second stratum in a drill hole transverse tangent circle corresponding to the drilling position of the drilling machine for drilling into the second stratum; and determining a target included angle according to the target height and the footage.
Optionally, the determining module is specifically configured to: determining a bow angle corresponding to a second stratum according to a first formula, wherein the bow angle is used for representing a bow angle corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to a drilling position of the drilling machine drilling into the second stratum; and determining the target height according to the bow angle and the well diameter of the target well.
x% = sin (a)/(2 π) -a/360+1 equation one
Wherein x% represents the content and a represents the corresponding bow angle of the second formation.
Optionally, the determining module is specifically configured to: determining the target height according to the following formula two:
wherein D represents the target height and D represents the borehole diameter of the target well.
Optionally, the determining module is specifically configured to: determining a target included angle according to the following formula III:
equation III for symbol beta = atan (d/h)
Wherein, the angle beta represents a target included angle, and h represents footage.
Optionally, the processing module is specifically configured to: if the well inclination angle is less than 90 degrees, determining the apparent dip angle of the stratum according to the following formula four:
formula four of angle delta =90 ° -. Angle alpha-. Angle beta
Wherein, the angle delta represents a stratum apparent dip angle, and the angle alpha represents a well dip angle;
or if the well inclination angle is larger than 90 degrees, determining the apparent dip angle of the stratum according to the following formula five:
the formula five of angle delta =anglealpha-90 deg.
In a third aspect, the present application provides an electronic device, comprising: a memory and a processor;
the memory is used for storing program instructions;
the processor is used for calling the program instructions in the memory to execute the method for regulating and controlling the drilling direction according to the first aspect of the application.
In a fourth aspect, the present application provides a computer-readable storage medium, in which computer program instructions are stored, and when the computer program instructions are executed, the method for regulating and controlling the drilling direction according to the first aspect of the present application is implemented.
In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements a method of steering a borehole direction as described in the first aspect of the present application.
According to the method and the device for regulating the drilling direction, the content of the first stratum rock debris drilled by the drilling machine and the footage of the drilling machine drilled into the second stratum are obtained in the process that the drilling machine drills into the second stratum from the first stratum of the target well, the target included angle is determined according to the content, the borehole diameter and the footage of the target well, the stratum view inclined angle is determined according to the well inclination angle and the target included angle of the target well, and the drilling direction of the drilling machine is regulated according to the stratum view inclined angle. Because this application is based on the rig and drills into the in-process of second stratum from the first stratum of target well, the content of the first stratum detritus that drills obtains the stratum and looks the inclination, need not put into the well through the cable with the formation inclination logging instrument down and measure the stratum inclination in order to obtain the stratum and look the inclination, consequently, can accurately obtain the stratum more fast and look the inclination, and then can regulate and control in real time the drilling direction more accurately.
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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, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application;
fig. 2 is a flowchart of a method for adjusting a drilling direction according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a method for controlling a drilling direction according to another embodiment of the present disclosure;
FIG. 4 is a schematic illustration of a drilling rig drilling into a second formation with a footage of the drilling rig and a content of first formation cuttings provided in accordance with an embodiment of the present disclosure;
FIG. 5a is a schematic illustration of determining apparent dip of a formation according to an embodiment of the present application;
FIG. 5b is a schematic illustration of determining apparent dip of a formation according to another embodiment of the present application;
FIG. 6 is a diagram illustrating a natural gamma curve according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a device for regulating a drilling direction according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Formation dip logging is the most effective common technique for measuring formation dip and dip in a well. At present, a formation dip logging instrument is put into a well through a cable to measure a formation dip, and then a formation visual dip is obtained. For the horizontal well, because the structure of the horizontal well is L-shaped and the cable is soft, the probe of the formation dip logger is difficult to enter the horizontal well section under the action of vertical gravity, and even if the probe of the formation dip logger can enter the horizontal well section, a plurality of probes of the formation dip logger are difficult to ensure to be vertical to a well hole at the horizontal well section and have a larger intersection angle with the same-nature rock surface. The same problem exists for highly deviated sections. The dip angle of the formation may also be determined from the footage of a drilling rig drilled from one formation into another adjacent formation by manually acquiring the footage of the drilling rig from the one formation according to logging curves such as Natural Gamma Ray (GR) (including Gamma while drilling), natural Potential (SP), and Acoustic time difference (AC). The stratum apparent dip angle obtained by the method is not accurate enough, so that the drilling direction cannot be accurately regulated and controlled.
Based on the problems, the application provides a method and a device for regulating and controlling the drilling direction, when a drilling machine drills and uncovers a stratum interface or a thin layer, the apparent dip angle of the stratum is obtained according to the contents of two rock debris and the like, and the method and the device are used for the geological guiding prediction while drilling of an oil layer and the like and the instant regulation and control of the drilling direction so as to improve the drilling rate of the oil layer.
First, an application scenario of the solution provided in the present application will be described below.
Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application. As shown in fig. 1, in the application scenario, in the process of drilling the sandstone layer 122 from the sandstone layer 121, the rock debris returned to the ground by the drilling equipment 110 includes sandstone layer rock debris and shale layer rock debris, the content of the sandstone layer rock debris and the content of the shale layer rock debris are respectively determined by the analysis instrument 130, and the computer equipment 140 obtains a corresponding formation apparent dip angle according to the content of the sandstone layer rock debris, the content of the shale layer rock debris, drilling information such as the footage of the drilling equipment 110, and transmits the formation apparent dip angle to the computer equipment 150 corresponding to the drilling control system through the network, so as to adjust and control the drilling direction. The specific implementation process of the computer device 140 obtaining the corresponding formation apparent dip angle according to the drilling data such as the content of the sandstone rock debris, the content of the mudstone rock debris, the footage of the drilling device 110, and the like, can refer to the schemes of the following embodiments.
It should be noted that fig. 1 is only a schematic diagram of an application scenario provided in this embodiment, and this embodiment of the present application does not limit the devices included in fig. 1, and also does not limit the positional relationship between the devices in fig. 1. For example, in the application scenario shown in fig. 1, a data storage device may also be included, and the data storage device may be an external memory with respect to the computer device 140 or the computer device 150, or may be an internal memory integrated in the computer device 140 or the computer device 150.
Next, a method for controlling the drilling direction will be described with reference to a specific embodiment.
Fig. 2 is a flowchart of a method for adjusting a drilling direction according to an embodiment of the present disclosure. The method of the embodiment of the application can be applied to electronic equipment, and the electronic equipment can be a server or a server cluster and the like. As shown in fig. 2, the method of the embodiment of the present application includes:
s201, in the process that the drilling machine drills into a second stratum from a first stratum of a target well, the content of the first stratum rock debris drilled by the drilling machine and the drilling depth of the drilling machine into the second stratum are obtained.
In the embodiment of the present application, the first formation is a sand formation, the second formation is a mud formation, and the target well includes a horizontal well section or a highly deviated well section, which is not limited in this application. For example, during the process that the drilling machine drills the sandstone layer into the shale layer from the sandstone layer of the horizontal well section of the target well, the content of the sandstone layer rock debris drilled by the drilling machine and the content of the shale layer rock debris drilled by the drilling machine can be respectively obtained according to the rock debris returned by the drilling machine. For example, the drilling machine drills 90% of sandstone rock debris and 10% of shale rock debris. The drilling machine drills into the footage of the second stratum and can obtain drilling data corresponding to the drilling machine in real time.
S202, determining a target included angle according to the content, the hole diameter of the target well and the footage.
The target included angle is used for representing the included angle between the interface of the first stratum and the second stratum and the drilling direction along the drilling direction.
In this step, the hole diameter of the target well can be obtained according to the size of the drill bit of the drilling machine and the expansion condition (for example, expansion by 10%). After the content of the first formation rock debris drilled by the drilling machine and the drilling footage of the drilling machine for drilling into the second formation are obtained, the target included angle can be determined according to the content of the first formation rock debris, the borehole diameter of the target well and the drilling footage of the drilling machine for drilling into the second formation. The target included angle is an included angle between the interface of the first stratum and the second stratum and the drilling direction along the drilling direction, and the included angle is an acute angle. For how to determine the target included angle, reference may be made to related technologies or subsequent embodiments, which are not described herein again.
And S203, determining the apparent dip angle of the stratum according to the well inclination angle of the target well and the target included angle.
In the step, the inclination angle of the target well can be obtained in real time according to drilling data corresponding to the drilling machine. After the target well's inclination angle and the target included angle are obtained, the apparent dip of the formation may be determined. For how to determine the formation apparent dip angle, reference may be made to related art or subsequent embodiments, which are not described herein again.
And S204, regulating and controlling the drilling direction of the drilling machine according to the stratum apparent dip angle.
In the embodiment of the application, after the formation apparent dip angle is obtained, the drilling direction of the drilling machine can be regulated and controlled according to the formation apparent dip angle. Illustratively, in the process that the drilling machine drills into the mudstone layer from the sandstone layer of the horizontal well section of the target well, the drilling direction of the drilling machine can be regulated and controlled according to the apparent dip angle of the stratum, and the drilling machine is guaranteed to drill in the mudstone layer.
It should be noted that, in the method of the embodiment of the present application, for the case that the borehole is not orthogonal to the formation, the apparent dip angle of the formation can be obtained, and the apparent dip angle approaches the true dip angle when the actual borehole has a smaller included angle between the borehole and the formation and has a higher precision and the borehole orientation is close to the formation (dike) tendency.
According to the method for regulating the drilling direction, the content of the first stratum rock debris drilled by the drilling machine and the footage of the drilling machine in the second stratum are obtained in the process that the drilling machine drills into the second stratum from the first stratum of the target well, the target included angle is determined according to the content, the borehole diameter and the footage of the target well, the stratum view inclined angle is determined according to the well inclination angle and the target included angle of the target well, and the drilling direction of the drilling machine is regulated according to the stratum view inclined angle. Because this application embodiment is based on the rig and drills into the in-process in second stratum from the first stratum of target well, the formation is looked the inclination from the content of the first stratum detritus that drills out, need not put into the well through the cable with formation inclination logging instrument down and measure the formation inclination in order to obtain the formation and look the inclination, consequently, can accurately obtain the formation more fast and look the inclination, and then can adjust and control in real time to the drilling direction more accurately.
Fig. 3 is a flowchart of a method for controlling a drilling direction according to another embodiment of the present disclosure. On the basis of the above embodiments, the method for regulating and controlling the drilling direction is further described in the embodiments of the present application. As shown in fig. 3, the method of the embodiment of the present application may include:
s301, in the process that the drilling machine drills into a second stratum from a first stratum of the target well, the content of the first stratum rock debris drilled by the drilling machine and the drilling depth of the drilling machine into the second stratum are obtained.
For a detailed description of this step, reference may be made to the description related to S201 in the embodiment shown in fig. 2, and details are not described here.
S302, determining the target height according to the content and the hole diameter of the target well.
The target height is used for representing the fan height corresponding to the second ground in a drilling hole transverse tangent circle corresponding to the drilling position of the drilling machine for drilling into the second ground.
For example, fig. 4 is a schematic diagram of the drilling footage of the drilling machine into the second formation and the content of the first formation cuttings, as shown in fig. 4, where the first formation is denoted by a, and the second formation is denoted by B, and fig. 4 shows a process of changing the content of the a cuttings from 100% to 0%, which corresponds to a process of the drilling machine from the first formation a into the second formation B until the drilling machine completely enters the second formation B. H represents the total footage of the drilling machine from the first stratum A to the second stratum B, H represents the footage of the drilling machine at the position of the second stratum B, and the footage of the drilling machine when the drilling machine drills into the second stratum BIn the transverse circle of the drilling hole corresponding to the position of the ruler h, D represents the fan height corresponding to the second stratum B, namely the target height, the well diameter (namely the drilling hole diameter) of the target well is represented by D, and the well radius (namely the drilling hole radius) of the target well is represented by R, then
In the step, after the content of the first formation debris drilled by the drilling machine and the hole diameter of the target well are obtained, the target height can be determined according to the content of the first formation debris drilled by the drilling machine and the hole diameter of the target well.
Optionally, determining the target height according to the content and the borehole diameter of the target well may include: determining a bow angle corresponding to a second stratum according to a first formula, wherein the bow angle is used for representing a bow angle corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to a drilling position of the drilling machine drilling into the second stratum; and determining the target height according to the bow angle and the well diameter of the target well.
x% = sin (a)/(2 π) -a/360+1 equation one
Wherein x% represents the content and a represents the corresponding bow angle of the second formation.
Illustratively, referring to fig. 4, during the drilling process of the drilling machine from a first stratum A into a second stratum B, the volume ratio of A rock fragments and B rock fragments which are uncovered by the drilling machine is in direct proportion to the ratio of the area of the arc of A and the area of the arc of B in a drilling transverse circle, and changes according to the depth of a footage. Drilling into a drilling hole transverse tangent circle corresponding to the footage position h of the drilling machine B, wherein the bow angle corresponding to the drilling machine B is represented by a, and the bow area in the drilling hole transverse tangent circle corresponding to the drilling machine A is represented by SAIndicating that B corresponds to the bow area in the transverse circle of the borehole by SBMeaning that the cross-sectional area of the bore hole tangent circle is π R2＝SA+SB＝π(D/2)2. The content of a rock debris is represented by x%, since x% = SA/(SA+SB)＝SA/πR2Thus, SA＝x％×πR2. At the same time, SA＝(360-a)×πR2/360+R2Xcos (a/2) sin (a/2), then: x% × π R2＝(360-a)×πR2/360+R2×cos(a/2)sin(a/2) Since sina =2 × sin (a/2) × cos (a/2), it is possible to obtain: x% = sin (a)/(2 π) -a/360+1, i.e., equation one. After the content x% of the A rock debris is obtained, the arc angle a corresponding to the second stratum can be determined according to the first formula. After the bow angle a corresponding to the second formation is obtained, the target height D can be determined according to the bow angle a and the well diameter D of the target well.
Optionally, determining the target height according to the bow-arc angle and the caliper of the target well may include: determining the target height according to the following formula two:
wherein D represents the target height and D represents the well diameter of the target well.
For example, referring to fig. 4, after obtaining the bow angle a corresponding to the second stratum and the borehole diameter D of the target well, the target height D may be obtained according to the second formula.
And S303, determining a target included angle according to the target height and the footage.
In the step, after the target height and the footage of the drilling machine to drill into the second stratum are obtained, the target included angle can be determined according to the target height and the footage of the drilling machine to drill into the second stratum.
Optionally, determining the target included angle according to the target height and the footage may include: determining a target included angle according to the following formula III:
formula III for angle beta = atan (d/h)
Wherein, the angle beta represents a target included angle, and h represents footage.
Exemplarily, referring to fig. 4, after the target height d and the footage h are obtained, the target included angle ≤ β can be obtained according to the formula iii.
S304, determining the apparent dip angle of the stratum according to the well inclination angle of the target well and the target included angle.
Based on the description related to S203 in the embodiment shown in fig. 2, optionally, determining the formation dip angle according to the well deviation angle of the target well and the target included angle includes: if the well inclination angle is less than 90 degrees, determining the apparent dip angle of the stratum according to the following formula four:
formula four of angle delta =90 ° -. Angle alpha-. Angle beta
Wherein, the angle delta represents a stratum apparent dip angle, and the angle alpha represents a well dip angle;
or if the well inclination angle is larger than 90 degrees, determining the formation apparent inclination angle according to the following formula five:
formula five of angle delta =: -angle beta-90 DEG
For example, fig. 5a is a schematic diagram for determining the apparent dip angle of the formation according to an embodiment of the present application, and as shown in fig. 5a, a cylinder in fig. 5a indicates that the drill bit drills a hole and a hole in the hole from the interface of the first formation a and the second formation B at a small included angle until the drill bit completely drills into the hole, in which the content of the a cuttings changes from 100% to 0%, and the content of the B cuttings changes from 0% to 100%. The angle alpha in fig. 5a represents the well inclination angle of the target well, the well inclination angle alpha is less than 90 degrees, the angle beta represents the target included angle, the angle delta represents the formation apparent inclination angle, H represents the total footage of the drilling machine from a to B, and D represents the well diameter (i.e. the drilling diameter). After the alpha and beta are obtained, delta can be obtained according to the formula IV. It can be understood that when the drilling machine fully drills into B from a, namely at the position corresponding to the total footage H in B, the ≦ β = atan (D/H) can be obtained according to the above formula three, and then the ≦ δ can be obtained according to the above formula four.
In fig. 5a, for the ultra-thin interlayer in B, the corresponding formation view dip angle can be obtained by the method of the embodiment of the present application.
Exemplarily, fig. 5b is a schematic diagram for determining the apparent dip angle of the formation according to another embodiment of the present invention, as shown in fig. 5b, the cylinder in fig. 5b indicates that the drill bit drills a hole with a small included angle from the interface of the first formation M and the second formation N gradually until the drill bit completely drills N, and the drill bit drills the hole with a size and a drilling direction during the process, wherein the content of M rock debris changes from 100% to 0%, and the content of N rock debris changes from 0% to 100%. The angle alpha 1 in the graph 5b represents the well inclination angle of the target well, the well inclination angle alpha 1 is more than 90 degrees, and the angle beta is1The angle of the target is represented as,∠δ1the formation dip is indicated, H1 represents the total footage of the rig from M fully into N, and D1 represents the hole diameter (i.e., borehole diameter). After the < alpha 1 and the < beta 1 are obtained, the < delta 1 can be obtained according to the formula five. It can be understood that when the drilling machine fully drills into N from M, namely corresponding to the position of the total footage H1, the ≈ β 1= atan (D1/H1) can be obtained according to the formula three, and then the ≈ δ 1 can be obtained according to the formula five.
S305, regulating and controlling the drilling direction of the drilling machine according to the formation apparent dip angle.
For a detailed description of this step, reference may be made to the description related to S204 in the embodiment shown in fig. 2, and details are not repeated here.
Alternatively, referring to FIG. 4, the drilling depth of B may be measured at x and y according to dx/hx＝dy/hy= D/H (wherein, D)xDenotes the target height at x, hxDenotes the footage at x, dyDenotes the target height at y, hyRepresenting the footage at y), predicting the content of A according to the footage, calculating the thickness, the distance and the like of the drilled B according to the content of A, and predicting how many meters of the drilled B can be drilled to completely enter the B. If B is a sandstone reservoir, it can be used to predict reservoir thickness.
According to the method for regulating the drilling direction, the content of the first formation rock debris drilled by the drilling machine and the drilling footage of the drilling machine into the second formation are obtained in the process that the drilling machine drills into the second formation from the first formation of the target well, the target height is determined according to the content and the borehole diameter of the target well, the target included angle is determined according to the target height and the footage, the formation view dip angle is determined according to the well dip angle and the target included angle of the target well, and the drilling direction of the drilling machine is regulated according to the formation view dip angle. Because this application embodiment is based on the rig and drills into the in-process in second stratum from the first stratum of target well, the formation is looked the inclination from the content of the first stratum detritus that drills out, need not put into the well through the cable with formation inclination logging instrument down and measure the formation inclination in order to obtain the formation and look the inclination, consequently, can accurately obtain the formation more fast and look the inclination, and then can adjust and control in real time to the drilling direction more accurately.
Based on the above embodiments, exemplarily, table 1 is the drilling data corresponding to the apparent dip angle of the sand-mud surface formation determined in a well, and as shown in table 1, at the well depth of 4942m of the well, the corresponding dip angle is 80 °, that is ×. α is 80 °, and the borehole diameter (i.e. the borehole diameter) is 0.242m (corresponding to the bit diameter 215.9 mm). Fig. 6 is a schematic view of a natural gamma curve provided by an embodiment of the present application, as shown in fig. 6, H represents a total drilling footage of a drilling machine from a first formation to a second formation, and H is 2.0m corresponding to a well depth of 4942m in table 1. Combining the drilling data of table 1 and the total footage H of fig. 6, according to the formula three, where d =0.242m and H =2.0m, then ≦ atan (0.242/2) =6.9 °, and then according to the formula four, the visual inclination angle of the sand-mud surface formation ≦ δ =90 ° - < α - < β =90 ° -80 ° -6.9 ° =3.1 ° can be obtained. Combining borehole orientation 100.62 ° and formation background in table 1, the near east dip of the formation in the target direction can be determined, with a formation apparent dip of 3.1 °.
TABLE 1 drilling data for determining apparent dip angle of sand-mud surface stratum in well
In summary, the technical solution provided by the present application has at least the following advantages:
(1) The occurrence of the stratum, the oil layer or the rock mass can be known in a short time, and technical help is provided for subsequent drilling and prediction;
(2) The formation elevation and the formation trend can be judged by acquiring the formation dip angle in real time, a basis and help are provided for controlling the formation while drilling, recognizing geology and predicting the front, and the reliability and the grasping performance of drilling such as the oil layer drilling rate are greatly improved. The stratum attitude can be known under the condition of little cost increase, stratum dip angle logging in the prior art can be conditionally replaced and compensated, and the investment cost of the stratum dip angle logging is saved.
(3) The method is suitable for various drilling fields such as petroleum horizontal wells, large-slope directional wells, high and steep stratum drilling, geological mineral exploration and development, coal exploration and mining, tunnel engineering, daily work and the like, and has wide application industry and prospect.
The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.
Fig. 7 is a schematic structural diagram of a device for regulating a drilling direction according to an embodiment of the present application, and as shown in fig. 7, a device 700 for regulating a drilling direction according to an embodiment of the present application includes: an acquisition module 701, a determination module 702, a processing module 703 and a regulation module 704. Wherein:
the obtaining module 701 is used for obtaining the content of the first formation cuttings drilled by the drilling machine and the drilling depth of the drilling machine into the second formation during the drilling process of the drilling machine into the second formation from the first formation of the target well.
A determining module 702, configured to determine a target included angle according to the content, the borehole diameter of the target well, and the footage, where the target included angle is used to represent an included angle between an interface of the first formation and the second formation and the borehole direction along the borehole direction.
And the processing module 703 is configured to determine the formation dip angle according to the well inclination angle of the target well and the target included angle.
And the regulating and controlling module 704 is used for regulating and controlling the drilling direction of the drilling machine according to the formation dip angle.
In some embodiments, the determining module 702 is specifically configured to: determining a target height according to the content and the well diameter of the target well, wherein the target height is used for representing the fan height corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to the drilling position of the drilling machine for drilling into the second stratum; and determining a target included angle according to the target height and the footage.
Optionally, the determining module 702 is specifically configured to: determining a bow angle corresponding to a second stratum according to a first formula, wherein the bow angle is used for representing a bow angle corresponding to the second stratum in a drilling hole transverse tangent circle corresponding to a drilling position of the drilling machine drilling into the second stratum; and determining the target height according to the bow angle and the well diameter of the target well.
x% = sin (a)/(2 π) -a/360+1 equation one
Wherein x% represents the content, and a represents the corresponding bow angle of the second formation.
Optionally, the determining module 702 is specifically configured to: determining the target height according to the following formula two:
wherein D represents the target height and D represents the borehole diameter of the target well.
Optionally, the determining module 702 is specifically configured to: determining a target included angle according to the following formula III:
equation III for symbol beta = atan (d/h)
Wherein, the angle beta represents a target included angle, and h represents footage.
In some embodiments, the processing module 703 is specifically configured to: if the well inclination angle is less than 90 degrees, determining the apparent dip angle of the stratum according to the following formula IV:
formula four of angle delta =90 ° -. Angle alpha-. Angle beta
Wherein, the angle delta represents a stratum apparent dip angle, and the angle alpha represents a well dip angle;
or if the well inclination angle is larger than 90 degrees, determining the formation apparent inclination angle according to the following formula five:
the formula five of angle delta =anglealpha-90 deg.
The apparatus of this embodiment may be configured to implement the technical solution of any one of the above-described method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Illustratively, the electronic device may be provided as a server or a computer. Referring to fig. 8, an electronic device 800 includes a processing component 801 that further includes one or more processors and memory resources, represented by memory 802, for storing instructions, such as applications, that are executable by the processing component 801. The application programs stored in memory 802 may include one or more modules that each correspond to a set of instructions. Furthermore, the processing component 801 is configured to execute instructions to perform any of the method embodiments described above.
The electronic device 800 may also include a power component 803 configured to perform power management of the electronic device 800, a wired or wireless network interface 804 configured to connect the electronic device 800 to a network, and an input/output (I/O) interface 805. The electronic device 800 may operate based on an operating system stored in memory 802, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM, or the like.
The application also provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the scheme of the method for regulating and controlling the drilling direction is implemented.
The present application also provides a computer program product comprising a computer program which, when executed by a processor, implements the solution of the method of regulating a direction of a borehole as described above.
The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also be present as discrete components in the regulation device of the drilling direction.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for regulating and controlling a drilling direction is characterized by comprising the following steps:
during the process that a drilling machine drills a second stratum from a first stratum of a target well, acquiring the content of first stratum rock debris drilled by the drilling machine and the drilling footage of the drilling machine into the second stratum;
determining a target included angle according to the content, the borehole diameter of the target well and the footage, wherein the target included angle is used for representing an included angle between the drilling direction and an interface of the first stratum and the second stratum along the drilling direction;
determining a stratum apparent dip angle according to the well inclination angle of the target well and the target included angle;
and regulating and controlling the drilling direction of the drilling machine according to the stratum apparent dip angle.
2. The method for regulating the drilling direction according to claim 1, wherein the determining a target included angle according to the content, the borehole diameter of the target well and the footage comprises:
determining a target height according to the content and the borehole diameter of the target well, wherein the target height is used for representing a fan height corresponding to the second stratum in a borehole transverse tangent circle corresponding to a drilling position of the drilling machine for drilling into the second stratum;
and determining the target included angle according to the target height and the footage.
3. The method for regulating the drilling direction according to claim 2, wherein the step of determining the target height according to the content and the borehole diameter of the target well comprises the following steps:
determining a bow angle corresponding to the second stratum according to a first formula, wherein the bow angle is used for representing a bow angle corresponding to the second stratum in a drill hole transverse tangent circle corresponding to a drilling position of the drilling machine for drilling into the second stratum;
determining the target height according to the bow-arc angle and the well diameter of the target well;
x% = sin (a)/(2 π) -a/360+1 equation one
Wherein x% represents the content, and a represents the corresponding bow angle of the second stratum.
4. The method of claim 3, wherein determining the target height based on the bow angle and the target well bore diameter comprises:
determining the target height according to the following formula two:
wherein D represents the target height and D represents the caliper of the target well.
5. The method for regulating and controlling the drilling direction according to claim 2, wherein the determining the target included angle according to the target height and the footage comprises:
determining the target included angle according to the following formula III:
equation III for symbol beta = atan (d/h)
Wherein the angle beta represents the target included angle, and h represents the footage.
6. The method for regulating the drilling direction according to any one of claims 1 to 5, wherein the determining the formation dip angle according to the well inclination angle of the target well and the target included angle comprises:
if the well inclination angle is less than 90 degrees, determining the formation apparent inclination angle according to the following formula four:
formula four of angle delta =90 ° -. Angle alpha-. Angle beta
Wherein angle δ represents the formation apparent dip angle, and angle α represents the well dip angle;
alternatively, the first and second electrodes may be,
if the well inclination angle is larger than 90 degrees, determining the formation apparent inclination angle according to the following formula five:
the formula five of angle delta =anglealpha-90 deg.
7. A device for controlling the direction of a borehole, comprising:
the system comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for acquiring the content of first stratum rock debris drilled by a drilling machine and the drilling depth of the drilling machine into a second stratum in the process that the drilling machine drills into the second stratum from a first stratum of a target well;
the determining module is used for determining a target included angle according to the content, the well diameter of the target well and the footage, wherein the target included angle is used for representing an included angle between an interface of the first stratum and the second stratum and the drilling direction along the drilling direction;
the processing module is used for determining a formation apparent dip angle according to the well dip angle of the target well and the target included angle;
and the regulating and controlling module is used for regulating and controlling the drilling direction of the drilling machine according to the stratum apparent dip angle.
8. An electronic device, comprising: a memory and a processor;
the memory is to store program instructions;
the processor is used for calling the program instructions in the memory to execute the regulation and control method of the drilling direction according to any one of claims 1 to 6.
9. A computer-readable storage medium, wherein computer program instructions are stored in the computer-readable storage medium, and when executed, the computer program instructions implement the method for regulating the direction of a borehole according to any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, carries out the method of regulation of a drilling direction according to any one of claims 1 to 6.
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