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Determination method for initial well deviation azimuth angle of three-dimensional horizontal well borehole trajectory

A technology of well inclination azimuth and wellbore trajectory, applied in wellbore/well components, directional drilling, earthwork drilling and production, etc., can solve the problems of difficult determination and many factors affecting the initial well inclination azimuth

Active Publication Date: 2015-05-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the initial well inclination azimuth of the three-dimensional horizontal well trajectory, so as to solve the problem that the existing initial well inclination and azimuth are difficult to determine due to many influencing factors

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  • Determination method for initial well deviation azimuth angle of three-dimensional horizontal well borehole trajectory
  • Determination method for initial well deviation azimuth angle of three-dimensional horizontal well borehole trajectory
  • Determination method for initial well deviation azimuth angle of three-dimensional horizontal well borehole trajectory

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Embodiment Construction

[0031] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] A method for determining the initial well deviation azimuth of a three-dimensional horizontal well trajectory will be described in detail below with an example. Taking a 3D horizontal well in Jinghe Oilfield, Ordos Basin as an example, as shown in figure 1 As shown, the specific steps of the method for determining the initial inclination azimuth of the borehole trajectory of the three-dimensional horizontal well are as follows:

[0033] 1. According to the X coordinate, Y coordinate and vertical depth of target point A of the designed horizontal well and the X coordinate, Y coordinate and vertical depth of target point B of the designed horizontal well, determine the inclination angle and azimuth angle of target point A of the horizontal well, A The target point refers to the starting point of the horizontal section (that is, the ent...

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Abstract

The invention relates to a determination method for an initial well deviation azimuth angle of a three-dimensional horizontal well borehole trajectory and belongs to the technical field of petroleum natural gas drilling. The determination method comprises the following steps: determining a final target-entering deviation angle and a well deviation azimuth angle according to parameters of a target point A and a target point B; determining a minimum stable deviation section length and a well deviation angle behind a twisting direction by using a vertical depth error of the target point A; determining a deviation change rate of a deviation change tool according to a deviation change capability of a drilling tool needing to be used; determining a borehole curve rate needed by a needed entering sleeve according to a sleeve type needing to be adopted; predicating a natural deviation change rate of a stratum according to adjoining well data; determining a first two-dimensional deviation increasing section maximum well deviation rate and a three-dimensional deviation increasing and twisting direction finishing point maximum deviation increasing rate; and combining the parameters to determine the initial well deviation azimuth angle of the three-dimensional horizontal well borehole trajectory. The quantified design is realized, and field drilling and oriented construction are convenient to realize; the oriented working amount is reduced and the drilling engineering cost is reduced.

Description

technical field [0001] The invention relates to a method for determining the initial inclination azimuth angle of a three-dimensional horizontal well borehole trajectory, and belongs to the technical field of oil and gas drilling. Background technique [0002] In the field of oil and gas drilling technology, in order to save land resources, protect the environment, and reduce drilling and completion costs, it is often beneficial to develop cluster horizontal wells in order to achieve the best development results. Application of Earth and Gas Fields" (Yan Jizeng, Deng Honglin, etc., "Sinopec Oil and Gas Exploitation Technology Forum Proceedings (2013)"). In order to increase the overall oil and gas production, it is required that the horizontal sections of the horizontal well be parallel, which requires three-dimensional wellbore trajectory design. In areas with complex terrain, in order to better deploy horizontal wells and select well sites, 3D well trajectory design is al...

Claims

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Application Information

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IPC IPC(8): E21B47/022E21B7/06
CPCE21B7/04G06F30/00
Inventor 闫吉曾罗懿胡冠王翔屈玉凤郭耀华
Owner CHINA PETROLEUM & CHEM CORP
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