CN109902890B - Horizontal well landing target-in-target evaluation method and system - Google Patents
Horizontal well landing target-in-target evaluation method and system Download PDFInfo
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Abstract
The invention relates to a horizontal well landing target-in-target evaluation method and system, and belongs to the technical field of petroleum and natural gas drilling. According to the method, on the basis of considering the target-in-target precision of the target A, the well deviation azimuth angle coincidence rate is increased, the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate are integrated to evaluate the landing target of the horizontal well, so that the evaluation result of the landing target of the horizontal well is more comprehensive and scientific, the evaluation of the landing target-in-target precision of an oil company and a directional construction unit is facilitated, and the track quality of a well bore is improved.
Description
Technical Field
The invention relates to a horizontal well landing target-in-target evaluation method and system, and belongs to the technical field of petroleum and natural gas drilling.
Background
In the technical field of petroleum and natural gas, in order to improve the reserve utilization rate of a reservoir, improve the yield of a single well, reduce the engineering cost and improve the benefit, the horizontal well has higher and higher occupation ratio, for example, in a Takayama land gas field, North China oil and gas division company builds the natural gas capacity of 10 hundred million square parts through the horizontal well, and a good effect is achieved. In horizontal well drilling, accurate landing of the target A is very important, especially for heterogeneous reservoirs, but for the target A accuracy and evaluation, the existing defects exist, the influence of the deviation azimuth angle of the target A is ignored, and in drilling practice, if the deviation between the actual drilling deviation azimuth angle of the target A and the deviation azimuth angle of the designed deviation azimuth angle of the target A is large (as shown in figure 1), in horizontal section drilling, the azimuth needs to be adjusted, so that the workload is increased invisibly, the efficiency is reduced, and the cost is increased.
Disclosure of Invention
The invention aims to provide a horizontal well landing hit evaluation method, which aims to solve the problem that the influence of a well deviation azimuth angle is not considered in the existing horizontal well landing hit evaluation, so that the evaluation result is inaccurate, and further the drilling efficiency is influenced; meanwhile, the invention also provides a horizontal well landing target evaluation system.
The invention provides a horizontal well landing target evaluation method for solving the technical problems, which comprises the following steps:
1) according to well mouth coordinates, target point A coordinates, target point B coordinates, horizontal section control point coordinates and corresponding vertical depths given by drilling geological design, determining design vertical depths, design transverse distances, design longitudinal distances and design well deviation azimuth angles of the target point A;
2) after actual drilling to the target point A, calculating the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A;
3) calculating target precision and well deviation azimuth coincidence rate in the A target spot according to the design vertical depth, the design transverse distance, the design longitudinal distance and the design well deviation azimuth of the A target spot, and the real drilling vertical depth, the real drilling transverse distance, the real drilling longitudinal distance and the real drilling well deviation azimuth of the A target spot;
4) and evaluating the target hitting situation of the horizontal well landing according to the target hitting precision of the target spot A and the well deviation azimuth angle coincidence rate.
According to the method, on the basis of considering the target-in-target precision of the target A, the well deviation azimuth angle coincidence rate is increased, the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate are integrated to evaluate the landing target of the horizontal well, so that the evaluation result of the landing target of the horizontal well is more comprehensive and scientific, the evaluation of the landing target-in-target precision of an oil company and a directional construction unit is facilitated, and the track quality of a well bore is improved.
Further, the target centering precision D in the step 3)JComprises the following steps:
wherein DJThe target-in-focus precision is zero dimension; max is the function of the maximum value; n is a radical ofADesigning a longitudinal distance for the target point A, wherein the unit is m;
the actual drilling longitudinal distance is the target point A, and the unit is m; eADesigning a transverse distance for the target point A, wherein the unit is m;
the unit is m, and the transverse distance is the real drilling transverse distance of the target point A.
Further, the well deviation azimuth angle coincidence rate D in the step 3)φComprises the following steps:
wherein phi isADesigning a well deviation azimuth angle for the target point A, wherein the unit is degree; | | represents an absolute value function;
actually drilling a well with an oblique azimuth angle of the target point A in degrees; dφThe deviation azimuth angle coincidence rate of the A target spot well is dimensionless.
Further, the step 4) is to divide the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A into at least three levels, and evaluate the target-in-landing of the horizontal well according to the level of the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A.
Further, after the actual drilling reaches the target point A, inclination measurement is carried out on the well track in the step 2), and the actual drilling vertical depth, the actual drilling horizontal distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A are calculated according to inclination measurement data.
Further, the inclination measuring mode adopted in the step 2) is single-point inclination measuring, multi-point inclination measuring, inclination measuring while drilling or continuous inclination measuring during well logging.
The invention also provides a horizontal well landing on-target evaluation system, which comprises a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor is coupled with the memory, and the processor executes the computer program to realize the following instructions:
A. according to well mouth coordinates, target point A coordinates, target point B coordinates, horizontal section control point coordinates and corresponding vertical depths given by drilling geological design, determining design vertical depths, design transverse distances, design longitudinal distances and design well deviation azimuth angles of the target point A;
B. after actual drilling to the target point A, calculating the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A;
C. calculating target precision and well deviation azimuth coincidence rate in the A target spot according to the design vertical depth, the design transverse distance, the design longitudinal distance and the design well deviation azimuth of the A target spot, and the real drilling vertical depth, the real drilling transverse distance, the real drilling longitudinal distance and the real drilling well deviation azimuth of the A target spot;
D. and evaluating the target hitting situation of the horizontal well landing according to the target hitting precision of the target spot A and the well deviation azimuth angle coincidence rate.
Further, the calculation formula adopted by the target centering precision is as follows:
wherein DJThe target-in-focus precision is zero dimension; max is the function of the maximum value; n is a radical ofADesigning a longitudinal distance for the target point A, wherein the unit is m;
the actual drilling longitudinal distance is the target point A, and the unit is m; eADesigning a transverse distance for the target point A, wherein the unit is m;
the unit is m, and the transverse distance is the real drilling transverse distance of the target point A.
Further, the calculation formula adopted by the well deviation azimuth angle coincidence rate is as follows:
wherein phi isADesigning a well deviation azimuth angle for the target point A, wherein the unit is degree; | | represents an absolute value function;
for A target point to actually drill a well with an oblique azimuth angle and unitDegree; dφThe deviation azimuth angle coincidence rate of the A target spot well is dimensionless.
And D, dividing the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A into at least three levels, and evaluating the landing target-in-target of the horizontal well according to the level of the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A.
And further, after the actual drilling is carried out to the target point A, inclination measurement is carried out on the well track in the step B, and the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclination azimuth angle of the target point A are calculated according to inclination measurement data.
Further, the inclination measuring mode adopted in the step B is single-point inclination measuring, multi-point inclination measuring, inclination measuring while drilling or continuous inclination measuring during well logging.
Drawings
FIG. 1 is a schematic diagram of a target design well deviation azimuth and a real well deviation azimuth of a horizontal well A;
FIG. 2 is a schematic diagram of the design position and the actual drilling position of a target point of a horizontal well A in the embodiment of the invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The method fully considers the target centering precision of the target point A, simultaneously introduces the well deviation azimuth angle coincidence rate, and more comprehensively evaluates the landing target centering of the horizontal well. According to the well head coordinate and the target point coordinate given by the drilling geological design and the corresponding vertical depth, the well borehole orbit is made, so that the design vertical depth, the design longitudinal distance, the design transverse distance and the well deviation azimuth angle of a landing point (A target point) are determined; then, after drilling to the target point A, calculating by inclination measurement to obtain the true drilling vertical depth, the true drilling longitudinal distance, the true drilling transverse distance and the true drilling inclination azimuth angle; and finally, calculating the hit precision and the well deviation azimuth angle coincidence rate, and determining the landing hit evaluation of the horizontal well according to the obtained calculated hit precision and the well deviation azimuth angle coincidence rate. The horizontal well landing target evaluation method is explained in detail below by taking a certain three-dimensional horizontal well of the eildos basin jing oil field as an example.
1. And determining the design vertical depth, the design transverse distance, the design longitudinal distance and the design well deviation azimuth angle of the target point A according to the well head coordinate, the target point A coordinate, the target point B coordinate, the horizontal section control point coordinate and the corresponding vertical depth given by the drilling geological design.
And (4) making a borehole orbit design according to well mouth coordinates, target point A coordinates, target point B coordinates and horizontal section control point coordinates given by the drilling geological design, adjacent well data and industrial specifications. In this example, the borehole trajectory is designed by referring to the industry specifications through the relevant data given by the drilling geological design and the known data of the adjacent well such as the stratum sequence, the stratum pressure, the stratum temperature and the like, wherein the data of the target point a is shown in table 1.
TABLE 1
It can be seen that the vertical depth of the target point A in the example is 1397.2m, the design longitudinal distance is 2m, the design transverse distance is 10m, and the well deviation azimuth angle is 345 degrees.
2. And after actually drilling to the target point A, determining the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A.
And after the drill reaches the target point A, carrying out inclination measurement on the track of the well by a Measurement While Drilling (MWD) instrument to obtain corresponding inclination measurement data, wherein the inclination measurement modes comprise single-point inclination measurement, multi-point inclination measurement, Measurement While Drilling (MWD) and well logging continuous inclination measurement. In the example, the actual drilling position and the design position of the target point A are shown in fig. 2, and the inclination measurement data are calculated according to the corrected average angle method to obtain the actual drilling vertical depth 1396.94, the actual drilling longitudinal distance 0.26m, the actual drilling transverse distance 3.31m and the actual drilling inclination azimuth angle 343.31 degrees of the target point A.
3. And calculating the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A.
The target-in-target precision of the target A is obtained by calculation according to the design longitudinal distance of the target A, the design transverse distance of the target A, the actual drilling longitudinal distance of the target A and the actual drilling transverse distance of the target A, and the adopted calculation formula is as follows:
wherein DJThe target-in-focus precision is zero dimension; max is the function of the maximum value; n is a radical ofADesigning a longitudinal distance for the target point A, wherein the unit is m;
the actual drilling longitudinal distance is the target point A, and the unit is m; eADesigning a transverse distance for the target point A, wherein the unit is m;
the unit is m, and the transverse distance is the real drilling transverse distance of the target point A.
The well deviation azimuth coincidence rate is obtained by calculating according to the designed well deviation azimuth of the target point A and the actual well drilling deviation azimuth of the target point A, and the adopted calculation formula is as follows:
wherein phi isADesigning a well deviation azimuth angle for the target point A, wherein the unit is degree; | | represents an absolute value function;
actually drilling a well with an oblique azimuth angle of the target point A in degrees; dφThe deviation azimuth angle coincidence rate of the target point A is dimensionless.
In the embodiment, the obtained A target point real drilling longitudinal distance is 0.26m, the real drilling transverse distance is 3.31m, the designed longitudinal distance is 2m and the designed transverse distance is 10m, and the obtained A target point target precision is substituted into the A target point target precision calculation formula:
similarly, substituting the obtained design well deviation azimuth 345 degrees of the A target point and the actual well drilling inclination azimuth 343.31 degrees of the A target point into a well deviation azimuth coincidence rate calculation formula, wherein the calculated well deviation azimuth coincidence rate is as follows:
4. and evaluating the target hitting situation of the horizontal well landing according to the target hitting precision of the target spot A and the well deviation azimuth angle coincidence rate.
Dividing the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A into at least three levels, and evaluating the landing target-in-target of the horizontal well according to the level of the target-in-target precision and the well deviation azimuth angle coincidence rate of the target point A. The principle of target evaluation in the target A determined by the invention is as follows: when D is presentJIf < 0, off-target is indicated; when 0 < DJ< 0.6 and DφWhen the landing target is more than 0.85, the landing target of the horizontal well is qualified; when D is more than or equal to 0.6J< 0.85 and DφWhen the landing time is more than 0.90, the landing target of the horizontal well is good; when D is more than 0.85JAnd DφWhen the landing time is more than 0.95, the target quality in the horizontal well landing is indicated.
The horizontal well landing target was evaluated as "good" according to a target-in-target accuracy of 0.669 in this example, and a true well inclination azimuth and design well inclination azimuth coincidence rate of 0.9951.
The method may be stored as a computer program in a memory in the horizontal well landing on-target evaluation system and may be run on a processor in the horizontal well landing on-target evaluation system.
The well borehole orbit is made according to the well mouth coordinate and the target point coordinate given by the drilling geological design and the corresponding vertical depth, so that the vertical depth, the design longitudinal distance, the design transverse distance and the well inclination azimuth angle of a landing point (A target point) are determined. And after drilling to the target point A, obtaining the actual drilling vertical depth, the actual drilling longitudinal distance, the actual drilling transverse distance and the actual drilling inclined azimuth angle through inclination measurement and calculation, then calculating the target-in-landing precision and the well inclined azimuth angle coincidence rate, and accordingly giving the landing target-in-landing evaluation according to the judgment principle. The method fully considers the target centering precision of the target point A, simultaneously introduces the well deviation azimuth angle coincidence rate, and more scientifically evaluates the landing target centering condition.
Finally, it should be noted that: the above embodiments are merely illustrative, not restrictive, of the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (8)
1. A horizontal well landing target-in-target evaluation method is characterized by comprising the following steps:
1) according to well mouth coordinates, target point A coordinates, target point B coordinates, horizontal section control point coordinates and corresponding vertical depths given by drilling geological design, determining design vertical depths, design transverse distances, design longitudinal distances and design well deviation azimuth angles of the target point A;
2) after actual drilling to the target point A, calculating the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A;
3) calculating target precision and well deviation azimuth coincidence rate in the A target spot according to the design vertical depth, the design transverse distance, the design longitudinal distance and the design well deviation azimuth of the A target spot, and the real drilling vertical depth, the real drilling transverse distance, the real drilling longitudinal distance and the real drilling well deviation azimuth of the A target spot;
4) evaluating the target hitting situation of the horizontal well landing according to the target hitting precision of the target spot A and the well deviation azimuth angle coincidence rate;
the well deviation azimuth angle coincidence rate D in the step 3)φComprises the following steps:
wherein phi isADesigning a well deviation azimuth angle for the target point A, wherein the unit is degree; | | represents an absolute value function;
actually drilling a well with an oblique azimuth angle of the target point A in degrees; dφThe deviation azimuth angle coincidence rate of the A target spot well is dimensionless.
2. The horizontal well landing on-target evaluation method according to claim 1, wherein the on-target sperm in the step 3)Degree DJComprises the following steps:
wherein DJThe target-in-focus precision is zero dimension; max is the function of the maximum value; n is a radical ofADesigning a longitudinal distance for the target point A, wherein the unit is m;
the actual drilling longitudinal distance is the target point A, and the unit is m; eADesigning a transverse distance for the target point A, wherein the unit is m;
the unit is m, and the transverse distance is the real drilling transverse distance of the target point A.
3. The horizontal well landing hit evaluation method according to claim 1 or 2, wherein the step 4) is to divide the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate into at least three levels, and evaluate the horizontal well landing hit according to the level of the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate.
4. The horizontal well landing target-in-landing evaluation method according to claim 1, wherein in the step 2), after actual drilling to the target point A, inclination measurement is performed on the well track, and the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclination azimuth angle of the target point A are calculated according to inclination measurement data.
5. A horizontal well landing on-target evaluation system, comprising a memory and a processor, and a computer program stored on the memory and executed on the processor, the processor being coupled to the memory, the processor implementing the following instructions when executing the computer program:
A. according to well mouth coordinates, target point A coordinates, target point B coordinates, horizontal section control point coordinates and corresponding vertical depths given by drilling geological design, determining design vertical depths, design transverse distances, design longitudinal distances and design well deviation azimuth angles of the target point A;
B. after actual drilling to the target point A, calculating the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclined azimuth angle of the target point A;
C. calculating target precision and well deviation azimuth coincidence rate in the A target spot according to the design vertical depth, the design transverse distance, the design longitudinal distance and the design well deviation azimuth of the A target spot, and the real drilling vertical depth, the real drilling transverse distance, the real drilling longitudinal distance and the real drilling well deviation azimuth of the A target spot;
D. evaluating the target hitting situation of the horizontal well landing according to the target hitting precision of the target spot A and the well deviation azimuth angle coincidence rate;
the calculation formula adopted by the well deviation azimuth angle coincidence rate is as follows:
wherein phi isADesigning a well deviation azimuth angle for the target point A, wherein the unit is degree; | | represents an absolute value function;
actually drilling a well with an oblique azimuth angle of the target point A in degrees; dφThe deviation azimuth angle coincidence rate of the A target spot well is dimensionless.
6. The horizontal well landing hit evaluation system of claim 5, wherein the hit accuracy is calculated by the following formula:
wherein DJThe target-in-focus precision is zero dimension; max is the function of the maximum value; n is a radical ofADesigning a longitudinal distance for the target point A, wherein the unit is m;
the actual drilling longitudinal distance is the target point A, and the unit is m; eADesigning a transverse distance for the target point A, wherein the unit is m;
the unit is m, and the transverse distance is the real drilling transverse distance of the target point A.
7. The horizontal well landing targeting evaluation system according to claim 5 or 6, wherein the step D comprises dividing the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate into at least three levels, and evaluating the horizontal well landing targeting according to the level of the target-in-target precision of the target A and the well deviation azimuth angle coincidence rate.
8. The horizontal well landing on-target evaluation system according to claim 5, wherein in the step B, after actual drilling to the target point A, inclination measurement is performed on the well track, and the actual drilling vertical depth, the actual drilling transverse distance, the actual drilling longitudinal distance and the actual drilling inclination azimuth angle of the target point A are calculated according to inclination measurement data.
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| CN105317431A (en) * | 2014-07-30 | 2016-02-10 | 中国石油化工股份有限公司 | Method for explaining and evaluating logging parameters of horizontal well |
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| US8612271B2 (en) * | 2008-10-02 | 2013-12-17 | Certusview Technologies, Llc | Methods and apparatus for analyzing locate and marking operations with respect to environmental landmarks |
| CN103883311A (en) * | 2013-03-22 | 2014-06-25 | 中国石油化工股份有限公司 | Composite oriented drilling target-entering situation prediction method |
| CN104675381B (en) * | 2013-11-26 | 2017-09-15 | 中国石油天然气股份有限公司 | The appraisal procedure and device of target situation in a kind of drilling well |
| CN104481400B (en) * | 2014-12-10 | 2016-08-10 | 中国石油化工股份有限公司 | A kind of three-dimensional horizontal well track control method |
| CN104481398B (en) * | 2014-12-10 | 2016-08-24 | 中国石油化工股份有限公司 | A kind of three-dimensional horizontal well drilling construction method |
| CN104632079B (en) * | 2014-12-10 | 2017-01-25 | 中国石油化工股份有限公司 | Method for determining pre-target displacement of three-dimension horizontal well hole trajectory |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105317431A (en) * | 2014-07-30 | 2016-02-10 | 中国石油化工股份有限公司 | Method for explaining and evaluating logging parameters of horizontal well |
| CN104653172A (en) * | 2014-12-10 | 2015-05-27 | 中国石油化工股份有限公司 | Determination method for initial well deviation azimuth angle of three-dimensional horizontal well borehole trajectory |
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