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Apparatus and method for measuring borehole shape

A technology of measuring device and measuring method, which is applied in the field of shallow geophysical exploration, can solve problems such as inaccurate inversion results, and achieve the effects of avoiding deviation, being easy to carry, and convenient and convenient to operate

Active Publication Date: 2021-12-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a borehole shape measurement device and method, which can solve the problem of inaccurate detection and inversion results in wells and between wells, can accurately measure the shape of boreholes, and obtain Drilling angle

Method used

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  • Apparatus and method for measuring borehole shape
  • Apparatus and method for measuring borehole shape
  • Apparatus and method for measuring borehole shape

Examples

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Embodiment 1

[0038] In a typical embodiment of the present invention, such as figure 1 As shown, a borehole shape measurement device is proposed, which is suitable for the field of cross-hole and single-hole geophysical exploration, which includes: internal structure, transmission structure and external structure.

[0039] The internal structure includes an accelerometer 1 and a gyro compass 2. The accelerometer 1 and the gyro compass 2 are fixed inside the cylindrical outer wall 5 (ie, the housing) and tilted with the tilt of the device.

[0040] The transmission structure includes a wire 3 and a reading instrument 4. One end of the wire 3 is connected to the reading instrument 4, and one end passes through the rubber plug 10 in the hole at the top of the cylindrical outer wall 5 to connect with the accelerometer 1 and the gyro compass 2; the wire 3 is depicted with zero-based length dimensions.

[0041] The external structure includes a cylindrical outer wall 5, a support rod 6, a sprin...

Embodiment 2

[0049] This embodiment provides a method for measuring borehole shape, such as Figure 6 shown, including the following steps:

[0050] S101, at first, obtain the inclination angle of a certain distance in the drilling collected by the above-mentioned measuring device, here take h meters as an example; establish a coordinate system (here with east, west, north, south as the basic axis), and the calculated inclination angle is determined in the north-south direction The projection on the vertical plane, as shown in Figure 4(a);

[0051] S102, the calculated inclination angle is projected on the vertical plane determined by the east-west direction, as shown in Figure 4 (b); taking the inclination angle on the vertical plane determined by the north-south direction as an example, the angles of a series of inclination angles are known, and their assign to a 0 , a 1 , a 2 ...a n , using the formula y i =tan(a i ) can calculate the derivative value of the trend projection in t...

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Abstract

The invention discloses a drilling shape measuring device and method, which comprises a housing, in which an inclination measuring element is arranged, and a plurality of rod groups are arranged on the outer periphery of the housing, and each rod group includes two support rods arranged side by side up and down. One end of the support rod is rotatably connected to the outer wall of the housing, the other end of the support rod is suspended and connected to the pulley, and the support rod can rotate around the joint with the outer wall of the housing to adjust the size of the entire device.

Description

technical field [0001] The invention belongs to the technical field of shallow geophysical exploration, and in particular relates to a drilling shape measuring device and method. Background technique [0002] In cross-hole and single-hole geophysical exploration, if the borehole is inclined or non-linear, using a vertical model during inversion will lead to inaccurate inversion results, sometimes causing huge deviations and false anomalies, for example: in In cross-hole elastic wave tomography, if the borehole is not vertical, the calculation of the distance between the shot point and the receiving point will be wrong, and the velocity obtained by the inversion will seriously deviate from the actual rock mass velocity, resulting in wrong judgments. In order to solve this problem of in-well and inter-well detection, it is necessary to measure the shape of the borehole during detection, and modeling according to the actual shape of the borehole will help to obtain better and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/022E21B47/01E21B47/017E21B47/00
CPCE21B47/022E21B47/01E21B47/00
Inventor 杨洋王用鑫孙怀凤朱裕振赵法强
Owner SHANDONG UNIV
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