CN109695449B - Method and device for selecting drilling tool - Google Patents
Method and device for selecting drilling tool Download PDFInfo
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- CN109695449B CN109695449B CN201710984401.9A CN201710984401A CN109695449B CN 109695449 B CN109695449 B CN 109695449B CN 201710984401 A CN201710984401 A CN 201710984401A CN 109695449 B CN109695449 B CN 109695449B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
Abstract
The invention provides a method and a device for selecting a drilling tool. The method for selecting the drilling tool can realize the quantification of multiple attributes of comprehensive rock, select the drill bit adaptive to the multiple attributes of the rock according to the multiple attributes of the rock, improve the matching degree between the selected drill bit and the stratum and improve the drilling efficiency.
Description
Technical Field
The embodiment of the invention relates to a drilling technology in the field of petroleum exploration and development, in particular to a method and a device for selecting a drilling tool.
Background
During drilling, the drill bit is the primary tool for breaking rock and the borehole is formed by the drill bit breaking rock. The length of time a wellbore can take to form is related to the degree of mutual matching between the drill bit and the formation, in addition to the characteristics of the rock of the formation being drilled and the properties of the drill bit itself. The reasonable type selection of the drill bit plays an important role in improving the drilling speed and reducing the comprehensive drilling cost.
In the process of selecting the drill bit, the initial selection of the drill bit is usually performed according to the drillability of the rock, however, since the standard range of the drillability of the rock is narrow, the standard range is usually 1 to 10, and the measurement result in the actual test is often greater than 10, in which case, the selection of the suitable drill bit according to the drillability of the rock cannot be performed, i.e. the selection method of the drill bit is poor in field applicability.
Disclosure of Invention
The embodiment of the invention provides a method and a device for selecting a drilling tool, which can improve the matching degree between a selected drill bit and a stratum and improve the drilling efficiency.
In a first aspect, embodiments of the present invention provide a method for selecting a drilling tool, including:
testing the mechanical strength of rock of at least three rocks, and respectively obtaining the uniaxial compressive strength UCS and Young modulus of each rock; performing rock shear strength test on the at least three rocks, and respectively obtaining the three-axis shear strength TSE and the shear modulus of each rock; carrying out acoustic logging on the whole well section to obtain acoustic time difference logging data; performing fitting regression according to the uniaxial compressive strength UCS and Young modulus of each rock, the triaxial shear strength TSE and shear modulus of each rock and the sonic time difference logging data to determine the uniaxial compressive strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section; determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section; determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section; and determining characteristic parameters of the drill bit according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit.
Optionally, the method further includes: determining rock breaking mode information according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the rock breaking mode information is used for selecting a speed-up tool matched with the drill bit to drill according to the rock breaking mode information; the rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking.
Optionally, the determining the rock breaking mode information according to the energy required by the drill bit to penetrate into the formation and the energy required by the drill bit to shear the formation includes: when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock; when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking; when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking; and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
Optionally, the determining the energy required by the drill bit to penetrate into the formation according to the uniaxial compressive strength UCS of the whole wellbore section and the young modulus of the whole wellbore section includes: determining the energy required by the drill bit to penetrate the stratum according to the formula U1-1/2 UCS/tan E1; where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
Optionally, the determining the energy required by the drill bit to shear the formation according to the three-axis shear strength TSE of the full wellbore section and the shear modulus of the full wellbore section includes: determining the energy required by the drill bit to shear the formation according to the formula U2-1/2 TSE/tan E2; where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
In a second aspect, embodiments of the present invention provide a drilling tool selection apparatus, including:
the first acquisition module is used for carrying out rock mechanical strength test on at least three rocks and respectively acquiring the uniaxial compressive strength UCS and Young modulus of each rock; the second acquisition module is used for carrying out rock shear strength test on the at least three rocks and respectively acquiring the three-axis shear strength TSE and the shear modulus of each rock; the third acquisition module is used for performing acoustic logging on the whole well section to acquire acoustic time difference logging data; the rock mechanical parameter determining module is used for performing fitting regression according to the uniaxial compressive strength UCS and the Young modulus of each rock, the triaxial shear strength TSE and the shear modulus of each rock and the acoustic wave time difference logging data to determine the uniaxial compressive strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section; the first energy determination module is used for determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section; the second energy determination module is used for determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section; and the drill bit determining module is used for determining the characteristic parameters of the drill bit according to the energy required by the drill bit to eat the stratum and the energy required by the drill bit to shear the stratum, and the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit.
Optionally, the apparatus further comprises: an acceleration tool determination module; the speed-up tool determining module is used for determining rock breaking mode information according to the energy required by the drill bit to eat the stratum and the energy required by the drill bit to shear the stratum, and the rock breaking mode information is used for selecting a speed-up tool matched with the drill bit to drill according to the rock breaking mode information; the rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking.
Optionally, the acceleration tool determining module is configured to determine rock breaking mode information according to the energy required by the drill bit to penetrate into the formation and the energy required by the drill bit to shear the formation, and includes: when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock; when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking; when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking; and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
Optionally, the first energy determination module is configured to determine the energy required by the drill bit to penetrate the formation according to the uniaxial compressive strength UCS of the whole wellbore section and the young's modulus of the whole wellbore section, and includes: determining the energy required by the drill bit to penetrate the stratum according to the formula U1-1/2 UCS/tan E1; where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
Optionally, the second energy determination module is configured to determine the energy required by the drill bit to shear the formation according to the three-axis shear strength TSE of the whole wellbore section and the shear modulus of the whole wellbore section, and includes: determining the energy required by the drill bit to shear the formation according to the formula U2-1/2 TSE/tan E2; where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
The method and the device for selecting the drilling tool in the embodiment of the invention respectively obtain the uniaxial compressive strength UCS and the Young modulus of each rock by testing the rock mechanical strength of at least three rocks, respectively obtain the triaxial shear strength TSE and the shear modulus of each rock by testing the rock shear strength of at least three rocks, respectively carry out acoustic logging on the whole well section to obtain acoustic time difference logging data, determine the uniaxial compressive strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section according to the fitting regression of the uniaxial compressive strength UCS and the Young modulus of each rock, the triaxial shear strength TSE of each rock and the acoustic time difference logging data of each rock, determine the energy required by a drill bit to eat a stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section, the method comprises the steps of determining the energy required by a drill bit to shear a stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section, determining the characteristic parameters of the drill bit according to the energy required by the drill bit to penetrate into the stratum and the energy required by the drill bit to shear the stratum, selecting the drill bit to drill according to the characteristic parameters of the drill bit, so that the multiple attributes of comprehensive rock are quantized, selecting the drill bit suitable for the rock according to the multiple attributes of the rock, improving the matching degree between the selected drill bit and the stratum, and improving the drilling efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a first method of selecting a well tool according to the present invention;
FIG. 2 is a schematic diagram of a rock mechanical parameter curve of a whole well section;
FIG. 3 is a flow chart of a second method of selecting a well tool according to the present invention;
FIG. 4 is a schematic diagram of the energy curve required by a drill bit for a full interval to bite into the formation and the energy curve required by the drill bit for the full interval to shear the formation;
FIG. 5 is a schematic diagram of a first alternative embodiment of a drilling tool of the present invention;
fig. 6 is a schematic structural diagram of a second selection device of the drilling tool according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
Fig. 1 is a flowchart of a first method for selecting a drilling tool according to the present invention, and as shown in fig. 1, the method of this embodiment may include:
Specifically, at least three rocks, for example, three, four, five, etc., at different depths in the well section may be collected, that is, each rock comes from a different formation depth, and rock mechanical Strength tests may be performed on the collected at least three rocks, respectively, where the test standard is based on the rock mechanical test method of the international society for rock mechanics, and the Uniaxial Compressive Strength (UCS) and young's modulus (E1) of each rock are obtained, respectively. And the Poisson ratio (v) and the internal friction angle (phi) of each rock can be obtained by performing the rock mechanical strength test.
And 102, performing rock shear strength test on the at least three rocks, and respectively obtaining the three-axis shear strength TSE and the shear modulus of each rock.
Specifically, rock Shear Strength tests can be performed on at least three rocks at different depths in the collection well section, wherein the test standard respectively obtains the Triaxial Shear Strength (TCS) and Shear modulus (E2) of each rock according to the rock mechanics test method of the international rock mechanics society.
And 103, performing acoustic logging on the whole well section to obtain acoustic time difference logging data.
Specifically, by performing acoustic logging on the whole well section, acoustic time difference logging data of different depths in the whole well section can be acquired.
And 104, performing fitting regression according to the uniaxial compression strength UCS and the Young modulus of each rock, the triaxial shear strength TSE and the shear modulus of each rock and the sonic time difference logging data, and determining the uniaxial compression strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section.
Specifically, the acoustic time difference logging data of different depths in the whole well section are used, the rock mechanical parameters obtained by respectively carrying out rock mechanical strength test and rock shear strength test on at least three rocks of different depths in the acquisition well section are subjected to fitting regression, the relation between the rock mechanical parameters and the acoustic time difference logging data can be determined, and then the rock mechanical parameters of the whole well section are determined. The rock mechanics parameters specifically include the uniaxial compressive strength UCS, the young's modulus E1, the triaxial shear strength TCS and the shear modulus E2, but it is understood that other parameters such as poisson's ratio (v) and internal friction angle (phi) may also be included, which are not illustrated in this list.
Taking four rocks with the depths in the collection well being respectively a value 1, a value 2, a value 3 and a value 4 as an example, the concrete values of the uniaxial compressive strength UCS, the Young modulus E1, the triaxial shear strength TCS and the shear modulus E2 of the four rocks are listed in the first column to the fourth column in the following table, and the acoustic moveout logging data of the depths corresponding to the four rocks are listed in the fifth column in the following table.
TABLE 1 rock mechanics parameters and sonic time difference data
Fitting regression is performed according to the data in the table 1 to determine the relationship between the rock mechanical parameters and the acoustic moveout logging data as follows:
UCS＝0.0477DT2-10.83DT+614.63
E1＝0.0149DT2-3.1897DT+166.94
TSE＝0.0358DT2-7.7554DT+413.66
E2＝0.0243DT2-4.3793DT+202.66
according to the relation, a rock mechanics parameter curve of the whole well section can be established, the rock mechanics parameter curve of each whole well section comprises rock mechanics parameters of all depths, namely uniaxial compressive strength UCS of the whole well section, Young modulus of the whole well section, triaxial shear strength TSE of the whole well section and shear modulus of the whole well section can be obtained, fig. 2 is a rock mechanics parameter curve schematic diagram of the whole well section, as shown in fig. 2, the uniaxial compressive strength UCS curve of the whole well section comprises uniaxial compressive strength UCS of different depths, the Young modulus curve of the whole well section comprises Young moduli of different depths, the triaxial shear strength TSE curve of the whole well section comprises triaxial shear strength TSE of different depths, and the shear modulus curve of the whole well section comprises shear moduli of different depths. Optionally, an internal friction angle curve of the full wellbore section may be included, the internal friction angle curve of the full wellbore section including internal friction angles of different depths.
And 105, determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section.
And 106, determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section.
According to the embodiment of the invention, the energy required by the drill bit for breaking rock is divided into the energy required by the drill bit for eating into the stratum and the energy required by the drill bit for shearing the stratum.
And 107, determining characteristic parameters of the drill bit according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit.
The characteristic parameters of the drill bit may include drill bit design parameters such as a back rake angle and an aggressiveness, which are not illustrated herein.
Optionally, in the step 101, a rock mechanical strength test may be performed on at least three rocks to obtain a stress-strain curve of each rock, where a tangent value of an elastic segment of the stress-strain curve of each rock is the young modulus, and a height of an approximate triangle of the stress-strain curve of each rock is the uniaxial compressive strength UCS of the rock.
This embodiment, through carrying out rock mechanics intensity test to at least three rocks, acquire uniaxial compressive strength UCS and the young modulus of every rock respectively, it is right at least three rocks carry out rock shear strength test, acquire triaxial shear strength TSE and the shear modulus of every rock respectively, carry out the acoustic logging to the whole well section, acquire acoustic time difference logging data, according to uniaxial compressive strength UCS and the young modulus of every rock, triaxial shear strength TSE and the shear modulus of every rock and acoustic time difference logging data carry out the fitting regression, confirm the uniaxial compressive strength UCS of whole well section, the young modulus of whole well section, the triaxial shear strength of whole well section and the shear modulus of whole well section, according to the uniaxial compressive strength UCS of whole well section with the young modulus of whole well section confirms that the drill bit eats the required energy of stratum, according to the triaxial shear strength TSE of whole well section with the shear modulus of whole well section confirms drill bit shear ground of cutting The method comprises the steps of determining characteristic parameters of a drill bit according to the energy required by the drill bit to penetrate into the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit, so that multiple attributes of comprehensive rock are quantized, the drill bit which is suitable for the multiple attributes of the rock is selected according to the multiple attributes of the rock, the matching degree between the selected drill bit and the stratum is improved, and the drilling efficiency is improved.
The technical solution of the embodiment of the method shown in fig. 1 will be described in detail below by using several specific examples.
Fig. 3 is a flowchart of a second method for selecting a drilling tool according to the present invention, and as shown in fig. 3, the method of this embodiment may include:
And 203, performing acoustic logging on the whole well section to obtain acoustic time difference logging data.
And 204, performing fitting regression according to the uniaxial compression strength UCS and the Young modulus of each rock, the triaxial shear strength TSE and the shear modulus of each rock and the sonic time difference logging data, and determining the uniaxial compression strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section.
And step 205, determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section.
And step 206, determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section.
And step 207, determining characteristic parameters of the drill bit according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit.
For the detailed explanation of the above steps 201 to 207, reference may be made to the detailed explanation of the steps 101 to 107 in the embodiment shown in fig. 1, and details are not repeated here.
And 208, determining rock breaking mode information according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the rock breaking mode information is used for selecting a speed-up tool matched with the drill bit to drill according to the rock breaking mode information.
The rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking. That is, in this embodiment, on the basis of the embodiment shown in fig. 1, the rock breaking mode information may be determined according to the energy required by the drill bit to penetrate into the formation and the energy required by the drill bit to shear the formation, and then the speed raising tool used in cooperation with the drill bit is selected according to the determined rock breaking mode information to drill the well.
In an implementation manner of the foregoing embodiment, a specific implementation manner of the foregoing step 205 may be:
determining the energy required by the drill bit to eat the stratum according to the formula (1);
U1＝1/2*UCS*UCS/tan E1 (1)
where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
In an implementation manner of the foregoing embodiment, a specific implementation manner of the foregoing step 206 may be:
determining the energy required by the drill bit to shear the formation according to formula (2);
U2＝1/2*TSE*TSE/tan E2 (2)
where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
Taking the data in fig. 2 as an example for further illustration, according to the values of the uniaxial compressive strength UCS and the young modulus E1 at different depths in fig. 2, the energy required by the drill bit at different depths to penetrate into the formation can be obtained by using the formula (1), specifically, as shown in fig. 4, fig. 4 is a schematic diagram of an energy curve required by the drill bit at the whole well section to penetrate into the formation and an energy curve required by the drill bit at the whole well section to shear the formation, and according to the values of the triaxial shear strength TSE and the shear modulus E2 at different depths in fig. 2, the energy required by the drill bit at different depths to shear the formation can be obtained by using the formula (2), specifically, as shown in fig. 4.
Optionally, one implementation manner of the step 208 may be:
when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock; when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking; when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking; and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
The values of the first threshold and the second threshold can be flexibly set according to requirements.
Namely, preset rules as shown in table 2 are set, and the rock breaking mode information is determined.
TABLE 2 Preset rules Table
The energy required by the drill bit to enter the stratum is large, the energy required by the drill bit to enter the stratum is larger than the first threshold, the energy required by the drill bit to enter the stratum is small, and the energy required by the drill bit to enter the stratum is smaller than the first threshold. The energy required by the drill bit to shear the stratum is large, which means that the energy required by the drill bit to shear the stratum is larger than the second threshold value, and the energy required by the drill bit to shear the stratum is small, which means that the energy required by the drill bit to shear the stratum is smaller than the second threshold value.
As further illustrated in the embodiment shown in fig. 2, the rock breaking mode information is determined according to the energy required by the drill bit to penetrate into the formation and the energy required by the drill bit to shear the formation, and reference may be made to the rock breaking mode information shown in fig. 4, that is, the rock breaking mode information corresponding to the depth range of 1000 to 2500 is screw acceleration, the rock breaking mode information corresponding to the depth range of 2500 to 4500 is torsional rock breaking, the rock breaking mode information corresponding to the depth range of 4500 to 5500 is impact rock breaking, and the rock breaking mode information corresponding to the depth range of 5500 to 7000 is turbo rock breaking. And then a speed-up tool matched with the drill bit is selected according to the rock breaking mode information to drill the well.
This embodiment, through carrying out rock mechanics intensity test to at least three rocks, acquire uniaxial compressive strength UCS and the young modulus of every rock respectively, it is right at least three rocks carry out rock shear strength test, acquire triaxial shear strength TSE and the shear modulus of every rock respectively, carry out the acoustic logging to the whole well section, acquire acoustic time difference logging data, according to uniaxial compressive strength UCS and the young modulus of every rock, triaxial shear strength TSE and the shear modulus of every rock and acoustic time difference logging data carry out the fitting regression, confirm the uniaxial compressive strength UCS of whole well section, the young modulus of whole well section, the triaxial shear strength of whole well section and the shear modulus of whole well section, according to the uniaxial compressive strength UCS of whole well section with the young modulus of whole well section confirms that the drill bit eats the required energy of stratum, according to the triaxial shear strength TSE of whole well section with the shear modulus of whole well section confirms drill bit shear ground of cutting The method comprises the steps of determining characteristic parameters of a drill bit according to the energy required by the drill bit to penetrate into the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit, so that multiple attributes of comprehensive rock are quantized, the drill bit which is suitable for the multiple attributes of the rock is selected according to the multiple attributes of the rock, the matching degree between the selected drill bit and the stratum is improved, and the drilling efficiency is improved. And the speed raising tool is selected according to multiple properties of the rock so as to further improve the drilling efficiency.
Fig. 5 is a schematic structural diagram of a first selecting apparatus of a drilling tool according to an embodiment of the present invention, and as shown in fig. 5, the apparatus of this embodiment may include: the device comprises a first acquisition module 11, a second acquisition module 12, a third acquisition module 13, a rock mechanical parameter determination module 14, a first energy determination module 15, a second energy determination module 16 and a drill bit determination module 17, wherein the first acquisition module 11 is used for performing rock mechanical strength test on at least three rocks and respectively acquiring the uniaxial compressive strength UCS and Young modulus of each rock; the second obtaining module 12 is configured to perform a rock shear strength test on the at least three rocks, and obtain a three-axis shear strength TSE and a shear modulus of each rock respectively; the third acquisition module 13 is configured to perform acoustic logging on the whole well section to acquire acoustic time difference logging data; the rock mechanics parameter determining module 14 is configured to perform fitting regression according to the uniaxial compressive strength UCS and the young modulus of each rock, the triaxial shear strength TSE and the shear modulus of each rock, and the acoustic wave time difference logging data, and determine the uniaxial compressive strength UCS of the whole well section, the young modulus of the whole well section, the triaxial shear strength TSE of the whole well section, and the shear modulus of the whole well section; the first energy determination module 15 is used for determining the energy required by the drill bit to bite into the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section; a second energy determination module 16, configured to determine an energy required by the drill bit to shear the formation according to the three-axis shear strength TSE of the whole wellbore section and the shear modulus of the whole wellbore section; and the drill bit determining module 17 is used for determining the characteristic parameters of the drill bit according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, and the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a second selecting device of the drilling tool according to the present invention, and as shown in fig. 6, the device of this embodiment may further include, on the basis of the device structure shown in fig. 5: the accelerating tool determining module 18 is used for determining rock breaking mode information according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, and the rock breaking mode information is used for selecting an accelerating tool matched with the drill bit to drill according to the rock breaking mode information; the rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking.
The acceleration tool determining module 18 is configured to determine rock breaking mode information according to the energy required by the drill bit to penetrate into the formation and the energy required by the drill bit to shear the formation, and specifically may include: when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock; when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking; when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking; and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
Optionally, the first energy determination module 15 is configured to determine the energy required by the drill bit to penetrate into the formation according to the uniaxial compressive strength UCS of the whole wellbore section and the young's modulus of the whole wellbore section, and specifically may include: determining the energy required by the drill bit to penetrate the stratum according to the formula U1-1/2 UCS/tan E1; where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
Optionally, the second energy determination module 16 is configured to determine the energy required by the drill bit to shear the formation according to the three-axis shear strength TSE of the whole wellbore section and the shear modulus of the whole wellbore section, and specifically may include: determining the energy required by the drill bit to shear the formation according to the formula U2-1/2 TSE/tan E2; where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
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 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 to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art 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 invention.
Claims (8)
1. A method of selecting a well tool, comprising:
testing the mechanical strength of rock of at least three rocks, and respectively obtaining the uniaxial compressive strength UCS and Young modulus of each rock;
performing rock shear strength test on the at least three rocks, and respectively obtaining the three-axis shear strength TSE and the shear modulus of each rock;
carrying out acoustic logging on the whole well section to obtain acoustic time difference logging data;
performing fitting regression according to the uniaxial compressive strength UCS and Young modulus of each rock, the triaxial shear strength TSE and shear modulus of each rock and the sonic time difference logging data to determine the uniaxial compressive strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section;
determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section;
determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section;
determining characteristic parameters of the drill bit according to the energy required by the drill bit to eat the stratum and the energy required by the drill bit to shear the stratum, wherein the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit;
the method further comprises the following steps:
determining rock breaking mode information according to the energy required by the drill bit to enter the stratum and the energy required by the drill bit to shear the stratum, wherein the rock breaking mode information is used for selecting a speed-up tool matched with the drill bit to drill according to the rock breaking mode information;
the rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking.
2. The method of claim 1, wherein determining breaking mode information from the energy required by the drill bit to penetrate the formation and the energy required by the drill bit to shear the formation comprises:
when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock;
when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking;
when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking;
and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
3. The method according to any one of claims 1 or 2, wherein determining the energy required for the drill bit to penetrate the formation according to the compressive uniaxial strength UCS of the whole wellbore section and the Young's modulus of the whole wellbore section comprises:
determining the energy required by the drill bit to penetrate the stratum according to the formula U1-1/2 UCS/tanE 1;
where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
4. The method of any one of claims 1 or 2, wherein determining the energy required for the drill bit to shear the formation from the tri-axial shear strength, TSE, of the full wellbore section and the shear modulus of the full wellbore section comprises:
determining the energy required by the drill bit to shear the formation according to the formula U2-1/2 TSE/tanE 2;
where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
5. A well tool selection device, comprising:
the first acquisition module is used for carrying out rock mechanical strength test on at least three rocks and respectively acquiring the uniaxial compressive strength UCS and Young modulus of each rock;
the second acquisition module is used for carrying out rock shear strength test on the at least three rocks and respectively acquiring the three-axis shear strength TSE and the shear modulus of each rock;
the third acquisition module is used for performing acoustic logging on the whole well section to acquire acoustic time difference logging data;
the rock mechanical parameter determining module is used for performing fitting regression according to the uniaxial compressive strength UCS and the Young modulus of each rock, the triaxial shear strength TSE and the shear modulus of each rock and the acoustic wave time difference logging data to determine the uniaxial compressive strength UCS of the whole well section, the Young modulus of the whole well section, the triaxial shear strength TSE of the whole well section and the shear modulus of the whole well section;
the first energy determination module is used for determining the energy required by the drill bit to eat the stratum according to the uniaxial compressive strength UCS of the whole well section and the Young modulus of the whole well section;
the second energy determination module is used for determining the energy required by the drill bit to shear the stratum according to the three-axis shear strength TSE of the whole well section and the shear modulus of the whole well section;
the drill bit determining module is used for determining the characteristic parameters of the drill bit according to the energy required by the drill bit to eat the stratum and the energy required by the drill bit to shear the stratum, and the characteristic parameters of the drill bit are used for selecting the drill bit to drill according to the characteristic parameters of the drill bit;
the device further comprises: an acceleration tool determination module;
the speed-up tool determining module is used for determining rock breaking mode information according to the energy required by the drill bit to eat the stratum and the energy required by the drill bit to shear the stratum, and the rock breaking mode information is used for selecting a speed-up tool matched with the drill bit to drill according to the rock breaking mode information;
the rock breaking mode information comprises impact rock breaking, torsion rock breaking, turbine rock breaking and screw rock breaking.
6. The apparatus of claim 5, wherein the acceleration tool determination module is configured to determine breaking mode information based on the energy required by the drill bit to penetrate the formation and the energy required by the drill bit to shear the formation, and comprises:
when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is smaller than a second threshold value, the rock breaking mode information is that the screw rod breaks the rock;
when the energy required by the drill bit to eat the stratum is smaller than a first threshold value and the energy required by the drill bit to shear the stratum is larger than a second threshold value, the rock breaking mode information is the torsional rock breaking;
when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is less than the second threshold value, the rock breaking mode information is the impact rock breaking;
and when the energy required by the drill bit to eat the stratum is greater than the first threshold value and the energy required by the drill bit to shear the stratum is greater than the second threshold value, the rock breaking mode information is turbine rock breaking.
7. The apparatus of any one of claims 5 or 6, wherein the first energy determination module is configured to determine the energy required for the drill bit to penetrate the formation based on the uniaxial compressive strength UCS of the whole wellbore section and the Young's modulus of the whole wellbore section, and comprises:
determining the energy required by the drill bit to penetrate the stratum according to the formula U1-1/2 UCS/tanE 1;
where U1 represents the energy required for the bit to penetrate the formation and E1 represents the Young's modulus.
8. The apparatus of any one of claims 5 or 6, wherein the second energy determination module is configured to determine the energy required by the drill bit to shear the formation based on the three-axis shear strength TSE of the full wellbore section and the shear modulus of the full wellbore section, and comprises:
determining the energy required by the drill bit to shear the formation according to the formula U2-1/2 TSE/tanE 2;
where U2 represents the energy required for the bit to shear the formation and E2 represents the shear modulus.
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