CN111075424B - Method for correcting measurement results of measurement-while-drilling parameters - Google Patents
Method for correcting measurement results of measurement-while-drilling parameters Download PDFInfo
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- CN111075424B CN111075424B CN201911351997.4A CN201911351997A CN111075424B CN 111075424 B CN111075424 B CN 111075424B CN 201911351997 A CN201911351997 A CN 201911351997A CN 111075424 B CN111075424 B CN 111075424B
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- 238000005259 measurement Methods 0.000 title claims abstract description 80
- 238000005553 drilling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 239000011435 rock Substances 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 13
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 238000012417 linear regression Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000001141 propulsive effect Effects 0.000 claims description 9
- 238000009533 lab test Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract 2
- 239000000523 sample Substances 0.000 description 7
- 238000007599 discharging Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- 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
- E21B45/00—Measuring the drilling time or rate of penetration
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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Abstract
The invention provides a method for correcting measurement results of measurement parameters while drilling, which relates to the technical field of mine drilling measurement and comprises the following steps: A. taking a large coal rock sample or manufacturing a similar material simulation coal rock sample; B. the indoor test measures the unit footage torque, the propelling force and the rotating speed of a drill rod at the tail end position and the drill bit position of the drill rod of the drilling machine while drilling; C. obtaining a fitting relation of each unit of footage attenuation of measurement parameters at the tail end position of the drill rod and the drill bit position by utilizing linear regression analysis, and determining a torque correction coefficient, a propulsion correction coefficient and a rotating speed correction coefficient; D. measuring actual unit footage torque, propelling force and rotating speed of the tail end position of a drill rod of the drilling machine on site, and determining measurement parameters at the actual drill bit position by combining a correction coefficient and an indoor test approximate ratio; the technical problem that errors exist in the measurement parameters of the tail end of a drill rod of a drilling machine during mine drilling construction, particularly long drilling, is solved, and the method has the advantages of convenience in measurement construction and the like.
Description
Technical Field
The invention relates to the technical field of mine drilling measurement, in particular to a method for correcting measurement results of measurement parameters while drilling.
Background
In the coal mining process, drilling is an important technical means for collecting hydrogeological data, observing the stratum structure, detecting and discharging water and pumping and discharging gas. In addition, when drilling, the information such as rock mechanical parameters and the like can be indirectly obtained according to parameters such as cutting force of a drill bit, torsion of a drill rod and the like, and a great effect is played for guaranteeing engineering safety.
Currently, the measurement while drilling applications include sensor measurement of drilling parameters of a drilling machine, auxiliary pipe measurement while drilling, and the like, and generally the drilling parameters are measured at the tail end of a drill rod of the drilling machine, or the drilling parameters at the position of a drill bit are measured through an auxiliary device and a sensor. However, due to the extrusion and friction of the drilling rod under the confining pressure of the drilling hole during the drilling process, the measured parameters are lower than the actual values, and the test result has larger deviation.
In the drilling process of measuring the drilling rod while drilling, the accurate values of parameters such as torque, propelling force, rotating speed and the like are based on the vicinity of a drill bit, and due to the complex field environment, the parameter attenuation phenomenon often occurs from the drilling rod to the drill bit, and the attenuation degree is increased along with the increase of the depth of a drill hole. In view of the fact that a drill bit in the prior art is high in difficulty and high in cost for obtaining measurement parameters, the method for improving and correcting the measurement results of the measurement parameters while drilling is provided, and on the basis of not changing the original measurement method of the outer end of the drill rod, measurement errors while drilling can be reduced, and the drilling utilization rate and the accuracy of rock parameter determination are improved.
Disclosure of Invention
In order to solve the technical problem that errors exist when the measurement parameters of a drill rod are used as the measurement parameters of a drill hole in the drilling cutting method or the pressure relief process of the drill hole in coal mining and improve the utilization rate of the drill hole and the accuracy of determining rock parameters, the invention provides a method for correcting the measurement results of the measurement parameters while drilling, and the specific technical scheme is as follows.
A method of correcting measurements of measurement-while-drilling parameters, comprising the steps of:
a, taking a large coal rock sample or manufacturing a similar material simulation coal rock sample;
b, measuring measurement parameters of unit footage torque, unit footage propulsive force and unit footage rotating speed of the drill rod at the tail end position and the drill bit position of the drill rod of the drilling machine while drilling in an indoor test;
step C, obtaining a fitting relation of measurement parameters at the tail end position of the drill rod and the drill bit position per unit footage attenuation by utilizing linear regression analysis, and determining a torque correction coefficient K M1 Coefficient of propulsion correction K N1 And a rotation speed correction coefficient K V1 ；
D, measuring the actual unit footage torque M of the tail end position of the drill rod of the drilling machine in the mine field Now that Actual unit footage propulsive force N Now that Actual unit footage speed V Now that And determining the measurement parameter at the actual bit position by combining the correction coefficient and the laboratory test approximation ratio.
Preferably, the simulation ratio between the indoor test and the actual mine site is 1-1:5, the approximate ratio of the simulation to the actual mine site is 0.94-0.99, and the approximate ratio is in positive linear correlation with the simulation ratio; when the simulation ratio is 1.
Preferably, the torque correction coefficient K M1 Is calculated as:
K M1 = torque measurement at end of footpipe/bit position of laboratory test unit;
the propulsive force correction coefficient K N1 Is calculated as:
K N1 = measured thrust at end of footpipe/measured thrust at drill bit position for laboratory test unit;
the rotation speed correction coefficient K V1 Is calculated as:
K V1 = rotation speed measurement at laboratory test unit drill pipe end/thrust measurement at drill bit position.
It is also preferred that the measured parameters at the actual bit position comprise a unit rate torque M, an actual unit rate thrust N, an actual unit rate rotational speed V at the actual bit position, wherein:
M＝(M now that /K M1 ) X approximate ratio; n = (N) Now that /K N1 ) X approximate ratio; v = (V) Now that /K V1 ) X approximate ratio.
The invention has the beneficial effects that:
(1) The relation between torque, propelling force and rotating speed measurement parameters at the tail end of the drill rod and the position of the drill bit is accurately determined through an indoor test, so that a correction coefficient is determined, actual drilling measurement parameters on site are restored according to the correction coefficient and the approximate ratio, errors in the measurement process are reduced, and the accuracy, reliability and scientificity of an in-situ test are improved.
(2) The indoor test measurement is more accurate, the existing drilling process and drilling equipment are not required to be changed, the calculation is simple, convenient and fast, the application range is wide, and the method can be used for measurement while drilling under various rock qualities or complex conditions.
Drawings
FIG. 1 is a schematic flow chart of a method for correcting measurement results of measurement-while-drilling parameters;
FIG. 2 is a graph showing the parameter correction factor in example 1;
FIG. 3 is a graph showing the parameter correction coefficient in example 2.
Detailed Description
Referring to fig. 1 to 3, a method for correcting measurement while drilling parameter measurement results according to an embodiment of the present invention is as follows.
Based on the existing measurement while drilling technology, measurement while drilling parameters are acquired by a sensor, in order to reduce errors between a test value and an actual value and improve the measurement precision of the field measurement while drilling parameters, a correction coefficient is obtained by fitting and correcting a measurement while drilling parameter value at the outer end of a drill rod and a measurement while drilling parameter value of a measurement section sensor, wherein the correction coefficient is related to the length of the drill rod and the drilling depth and can be obtained by indoor tests and field actual measurement. The correction coefficient is applied to field engineering test, so that the aim of correcting the test result of the field measurement while drilling parameter can be fulfilled.
Example 1
A method of correcting measurements of measurement-while-drilling parameters, comprising the steps of:
and step A, taking a large coal rock sample or manufacturing a similar material simulation coal rock sample. Particularly, a large coal rock sample is taken on site and transported to a laboratory, or a similar material coal rock sample with consistent mechanical property is configured in the laboratory; and the sensors are used in a laboratory to measure and respectively monitor parameters such as torque and the like of the tail end of the drill rod and the position of the drill bit.
And B, measuring measurement parameters of unit footage torque, unit footage propulsive force and unit footage rotating speed of the drill rod at the tail end position and the drill bit position of the drill rod of the drilling machine while drilling in an indoor test.
Since the size of the indoor test is smaller than that of the field actual test, the simulation ratio between the indoor test and the mine field actual test is 1. When the simulation ratio is 1.
Step C, obtaining a fitting relation of the measurement parameters at the tail end position of the drill rod and the drill bit position per unit footage attenuation by utilizing linear regression analysis, and further determining a torque correction coefficient K M1 Coefficient of propulsion correction K N1 And a rotation speed correction coefficient K V1 。
Torque correction factor K M1 Is calculated as:
K M1 = torque measurement at end of footage drill pipe/torque measurement at bit position for unit of laboratory test;
coefficient of propulsion correction K N1 Is calculated as:
K N1 = measured thrust at end of footpipe/measured thrust at drill bit position for unit trial in laboratory;
correction coefficient K of rotation speed V1 Is calculated as:
K V1 and = rotating speed measurement/thrust measurement of bit position at the end of the footpipe of laboratory test unit.
Step D, measuring the actual unit footage torque M at the tail end of a drill rod of the drilling machine on the mine site Now that Actual unit footage propulsive force N Now that Actual unit footage speed V Now that And determining the measurement parameters at the actual drill bit position by combining the correction coefficient and the indoor test approximation ratio.
Because the length of the drill hole is large in the drilling cutting method monitoring and drilling pressure relief in the mine, 8-10 or more drill rods are required to be connected to meet the drilling requirement, and therefore the measurement parameters of the torque, the propelling force and the rotating speed at the actual drill bit position are greatly different from the measurement parameters of the tail end of the drill rod. The measurement parameters at the actual bit position include a unit footage torque M, an actual unit footage propulsion N, an actual unit footage rotational speed V at the actual bit position, wherein:
M＝(M now that /K M1 ) X is an approximate ratio; n = (N) Now that /K N1 ) X approximate ratio; v = (V) Now that /K V1 ) X approximate ratio.
The relation between torque, propelling force and rotating speed measurement parameters at the tail end of the drill rod and the position of the drill bit is accurately determined through an indoor test, a correction coefficient is further determined, actual drilling measurement on site is restored according to the correction coefficient and the approximate ratio, errors in the measurement process are reduced, and the accuracy, reliability and scientificity of an in-situ test are improved.
Example 2
According to the method, the test drilling is actually designed according to the site, the correction coefficient is further determined, and the actual drilling measurement parameters of the site drill bit position are restored according to the correction coefficient.
The method comprises the following steps of firstly, reasonably selecting the position of a region to be measured on site, drilling 2-5 drill holes at the position vertical to the coal wall, and carrying out measurement while drilling test on site.
Setting sensors at the positions of the drill rod and the drill bit respectively for parameter measurement, wherein the position of the drill bit is connected with a sensor measuring section, and the tail end of the drill rod is also monitored by the sensors; or the auxiliary probe while-drilling measuring device is used for measuring parameters such as torque, propelling force, rotating speed and the like at the position of the drill bit. And selecting a measuring method to measure the actual drilling parameters on site to obtain the measurement parameters of unit footage torque, unit footage propulsive force and unit footage rotating speed at the positions of the drill bit and the drill tail end of the test drilling.
Comparing the measured parameters of the drill bit position and the drill tail end position, fitting the two groups of data by utilizing linear regression analysis to obtain the fitting relation between the measured parameters of the drill bit position and the drill tail end position on site, wherein the fitting relation is related to the length of the drill rod and the drilling depth, and the fitting relation is utilized to carry out the drilling on each parameter of the outer end of the drill rodCorrecting to obtain torque correction coefficient K M2 Coefficient of propulsion correction K N2 A rotation speed correction coefficient K V2 。
Wherein the torque correction coefficient K M2 Is calculated as:
K M2 = torque measurement at the end of the drill rod/at the drill bit position of the unit footage measured on site;
coefficient of propulsion correction K N2 Is calculated as:
K N2 = measured propulsion force at the end of the unit penetration drill pipe/at the drill bit position;
correction coefficient of rotation speed K V2 Is calculated as:
K V2 and = measured speed/thrust at the end of the drill pipe per actual unit run-length on site.
And step four, during the subsequent actual drilling measurement while drilling, according to the correction coefficient of the test drilling, multiplying the parameters monitored at the outer end of the drill rod by the corresponding correction coefficient according to the drilling depth and the length of the drill rod, and further obtaining a corrected accurate measurement value.
The measurement parameters at the actual bit position include a unit footage torque M, an actual unit footage propulsion N, an actual unit footage rotational speed V at the actual bit position, wherein:
M＝M now that /K M2 ；N＝N Now that /K N2 ；V＝V Now that /K V2 。
Furthermore, the correction parameters calculated in the embodiment 1 can be combined, the correction parameters obtained by the indoor test and the test drilling are used for correction, and the calculated average value is taken as the actual measurement parameter on site, so that the accuracy of the test is further improved.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (2)
1. A method of correcting measurements of measurement-while-drilling parameters, comprising the steps of:
a, taking a large coal rock sample or manufacturing a similar material simulation coal rock sample;
b, measuring measurement parameters of unit footage torque, unit footage propulsive force and unit footage rotating speed at the tail end position of a drill rod and the position of a drill bit of the drilling machine in an indoor test while drilling;
c, obtaining a fitting relation of the measured parameters at the tail end position of the drill rod and the drill bit position per unit footage attenuation by utilizing linear regression analysis, and determining a torque correction coefficient K M1 Coefficient of propulsion correction K N1 And a rotation speed correction coefficient K V1 ；
D, measuring the actual unit footage torque M of the tail end position of the drill rod of the drilling machine on the mine site Now that Actual unit footage propulsive force N Now that Actual unit footage speed V Now that Determining a measurement parameter at the actual bit position by combining the correction coefficient and the indoor test approximation ratio;
the torque correction coefficient K M1 Is calculated as:
K M1 = torque measurement at end of footpipe/bit position of laboratory test unit;
the propulsive force correction coefficient K N1 Is calculated as:
K N1 = measured thrust at end of footpipe/measured thrust at drill bit position for unit trial in laboratory;
the rotation speed correction coefficient K V1 Is calculated as:
K V1 = rotation speed measurement at the end of the footage drill rod/thrust measurement at the drill bit position for laboratory test unit;
the measurement parameters at the actual bit position include a unit footage torque M, an actual unit footage thrust N, an actual unit footage rotational speed V at the actual bit position, wherein:
M=（M now that /K M1 ) X approximate ratio; n = (N) Now that /K N1 ) X approximate ratio; v = (V) Now that /K V1 ) X approximate ratio.
2. The method for correcting measurement while drilling parameter measurement results according to claim 1, wherein the simulation ratio between an indoor test and actual mine sites is 1 to 10 to 1, the approximate ratio of simulation to actual is 0.94 to 0.99, and the approximate ratio is positively linearly related to the simulation ratio; when the simulation ratio is 1.
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| CN105899757A (en) * | 2013-12-17 | 2016-08-24 | 哈利伯顿能源服务公司 | Drilling modeling calibration, including estimation of drill string stretch and twist |
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| CN109750977A (en) * | 2017-11-01 | 2019-05-14 | 陈晓新 | A kind of New well drilling torque increase square, which disappears, to quiver except vibratory tool |
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