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Evaluation method of actual-drilling well track integrity

An evaluation method and an integrated technology, which are applied in wellbore/well components, earthwork drilling, measurement, etc., to achieve the effects of simple and convenient operation, high compliance, and stable and reliable calculation results.

Active Publication Date: 2017-10-03
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the purpose of the present invention is to provide a method for evaluating the integrity of the actual drilling trajectory, to solve the quantitative judgment problem of the actual drilling trajectory and the design trajectory in the drilling operation

Method used

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  • Evaluation method of actual-drilling well track integrity
  • Evaluation method of actual-drilling well track integrity

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A method for evaluating the integrity of a real drilling wellbore trajectory, comprising the steps of:

[0049] (1) Collect the data of the designed wellbore trajectory and the actual drilled wellbore trajectory of the horizontal well to be evaluated, the coordinates of the wellhead, and the data of the altitude of the ground and the surface of the turntable;

[0050] Among them, the collection of the designed wellbore trajectory and the actual drilling trajectory data of the horizontal well to be evaluated, the wellhead coordinates, the ground and the surface altitude data of the turntable surface all need to be re-measured, and the actual drilling trajectory data is removed from the abnormal points of the inclinometer data.

[0051] (2) Take the angle between the direction of the space vector of the designed wellbore trajectory and the actual drilled wellbore trajectory collected in step (1) as the direction difference between the actual drilled wellbore trajectory and...

Embodiment 2

[0077] Taking Well Yanping 1 in Yan'an Gas Field of Yan'an Gas Exploration Company of Yanchang Petroleum Group as an example, the integrity of the actual drilling trajectory is analyzed.

[0078] (1) Collect the design and actual drilling trajectory data, wellhead coordinates, ground and turntable altitude data of Yanping 1 well drilled to be evaluated, and the ground altitude has been remeasured; as shown in Tables 1, 2, and 3.

[0079] Table 1 Wellhead, target coordinates and altitude data of Well Yanping 1

[0080]

[0081] Table 2 Well trajectory design data of Yanping 1 well

[0082]

[0083] Table 3 The actual drilling trajectory data of Well Yanping 1

[0084]

[0085]

[0086]

[0087]

[0088]

[0089]

[0090]

[0091] (2) Take the angle between the direction of the space vector of the designed wellbore trajectory and the actual drilled wellbore trajectory collected in step (1) as the direction difference between the actual drilled wellbor...

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Abstract

The invention relates to a method capable of performing integrity evaluation on an actual-drilling well track, in particular to an evaluation method of actual-drilling well track integrity. The evaluation method includes: collecting the design well track and actual-drilling well track data of a to-be-evaluated horizontal well, wellhead coordinates and ground and rotary table surface altitude data; using the angular separation of the spatial vectors of the design well track and the actual-drilling well track as the direction difference of the actual-drilling well track and the design well track; using the design well track data as the reference to obtain the distance difference between the actual-drilling well track and the design well track; processing the direction difference and the distance difference between the actual-drilling well track and the design well track to form a two-dimensional array for evaluating the actual-drilling well track integrity; performing actual-drilling well track evaluation according to two-dimensional array data change features. The evaluation method is simple and convenient to operate, unaffected by operation conditions and operation environments and capable of achieving the quantified evaluation of the actual-drilling well track.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a calculation method capable of performing overall evaluation on the actual drilling trajectory. Background technique [0002] The wellbore trajectory design of horizontal wells is gradually becoming more complex and refined, and the requirements for wellbore trajectory control are getting higher and higher. However, the quality of the actual drilling wellbore trajectory has a wide range of influences, not only related to whether risks can be safely avoided during the drilling process Adjacent wells, whether the target can be accurately hit, and it is also related to the smoothness of subsequent casing running, the quality of cementing and cementing, and the downhole operations in the later stage. Oil companies urgently need scientific and reasonable evaluation of the actual drilling trajectory and the engineering design. The degree of conformity to ensure the quality of the wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/022E21B47/04
CPCE21B47/022E21B47/04
Inventor 申峰杨全枝于小龙张晓斌王涛杨超张文哲杨先伦迟立宾侯云翌
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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