Design-while-drilling method for controlling borehole track while drilling well

A wellbore trajectory and design method technology, applied in directional drilling, wellbore/well components, earthwork drilling and production, etc., can solve problems such as failure to achieve drilling goals and plans, adverse effects of wellbore trajectory control, economic losses, etc.

Inactive Publication Date: 2007-03-28
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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Problems solved by technology

[0005] In short, in many cases, if the wellbore direction and the target are not restricted at the same time, it will have an adverse effect on the wellbore trajectory contr

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  • Design-while-drilling method for controlling borehole track while drilling well
  • Design-while-drilling method for controlling borehole track while drilling well
  • Design-while-drilling method for controlling borehole track while drilling well

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[0097] The present invention is further described below in conjunction with embodiment. The scope of the present invention is not limited by these examples, and the scope of the present invention is set forth in the claims.

[0098] In the following embodiments, curvature may also be used as a characteristic parameter.

[0099]Mathematically, the radius of curvature and the curvature are reciprocals of each other, and the unit of curvature at this time is rad / m. In drilling engineering, the commonly used units of borehole curvature are (°) / m, (°) / 30m, (°) / 100m, etc. At this time, the relationship between borehole curvature and curvature radius is:

[0100] R = 180 C κ πκ

[0101] In the formula:

[0102] κ—borehole curvature;

[0103] R—radius of curvature, m;

[0104] C κ ——Unit conversion factor, whose value is equal to the number in the c...

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Abstract

The invention relates to well bore rail control and design that includes the process of determining well bore section shape, building equation set, expanding equation set, giving known parameters, and solving the equation set. It could meet the request of target intake direction and coordinate location, and could select 4 random feature parameters as the indeterminate parameters. The invention could improve drilling speed and wellbore quality, lower drilling cost.

Description

technical field [0001] The invention relates to the control and design of wellbore trajectory in oil drilling, in particular to the drilling-while-drilling design of the wellbore trajectory. Background technique [0002] With the development of directional drilling technology, the requirements for well trajectory control are getting higher and higher. During the drilling construction process, it is impossible to completely match the drilled well trajectory with the pre-designed well trajectory, and there will always be a certain deviation between the two. The goal of wellbore trajectory control is to control this deviation within the allowable range, so as to successfully drill to the geological target. [0003] If the deviation between the actual drilling trajectory and the design trajectory exceeds the allowable range, it is necessary to modify the design to make it return to the design trajectory or directly drill to the target point (or target area). In geosteering dri...

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Application Information

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IPC IPC(8): E21B7/04E21B47/02
Inventor 刘修善曾义金郭才轩刘卫东孟庆生
Owner CHINA PETROLEUM & CHEM CORP
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