A Calculation Method of Borehole Trajectory Adaptive Inclinometer
A calculation method and self-adaptive measurement technology, which can be used in wellbore/well components, measurement, earthwork drilling, etc., and can solve problems such as poor calculation accuracy of inclination measurement.
Active Publication Date: 2021-05-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0005] The present invention provides an adaptive inclinometer calculation method for wellbore trajectory, aiming to solve the problem of poor calculation accuracy in inclination in the prior art. Parameters to identify the curve characteristics of the calculated measurement section, so as to select the appropriate curve to calculate the coordinate increment of the measurement section, which can adaptively match the curve characteristic parameters that are relatively close to the shape of the wellbore trajectory of the measurement section to be calculated, and can significantly improve the wellbore trajectory. Accuracy of inclinometer calculations
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[0052] In order to make the purpose, technical solutions and advantages of the present invention clearer, the embodiments of the present invention are described in further detail below:
[0053] The following will combine figure 1 A method for calculating the adaptive wellbore trajectory inclinometer according to the embodiment of the present invention will be described in detail.
[0054] refer to figure 1 As shown, a wellbore trajectory self-adaptive inclination calculation method provided by the embodiment of the present invention
[0055] Step 110: receiving and processing the inclinometer data, and numbering the measuring points and sections according to the inclinometer data.
[0056] Specifically, the first measuring point whose well deviation is not 0 is the first measuring point, and the number of the subsequent measuring points increases in turn until the last measuring point; the well depth above the first measuring point is 25m smaller than the first measuring po...
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The invention relates to a wellbore trajectory self-adaptive inclination calculation method in petroleum drilling, which belongs to the technical field of oil and gas drilling. According to the curve characteristics of the measured section, the appropriate curve can be selected to calculate the coordinate increment of the measured section. According to the variation law of the inclination angle and azimuth angle of the calculated section and the two sections before and after it, it can be automatically optimized and calculated. The characteristic parameters of the curve that are relatively close to the shape of the wellbore trajectory in the measured section can automatically fit the curve type that is closest to the actual drilled wellbore trajectory and perform inclination calculation, avoiding the mismatch between the assumed curve type and the actual drilled wellbore trajectory. It significantly improves the accuracy of borehole trajectory inclination calculation, which is of great significance in the aspects of rescue wells, connected wells, parallel horizontal wells and dense borehole anti-collision.
Description
technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to an adaptive inclination calculation method for borehole trajectory. Background technique [0002] The inclination calculation of wellbore trajectory in oil drilling usually needs to assume the curve type of the survey section between two survey points, and then determine the coordinate increment of the survey section according to the characteristics of this type of curve and the wellbore direction constraints at both ends, so as to determine The coordinates of each measuring point of the borehole trajectory. [0003] However, since it is unknown what kind of curve the actual wellbore trajectory is between the two measuring points, all sections of any trajectory are assumed to be a type of curve for inclinometer calculation. lead to large trajectory calculation errors. [0004] To solve this problem, the latest inclination calculation method takes the inclination an...
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IPC IPC(8): E21B47/022G06F17/10
CPCE21B47/022G06F17/10E21B43/25E21B43/30
Inventor 黄根炉于凡李伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)