Three-dimensional horizontal well borehole trajectory design method and system

A technology of wellbore trajectory and design method, applied in wellbore/well components, calculation, earth-moving drilling, etc., can solve problems such as low precision and unreasonable initial orientation design

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a three-dimensional horizontal well borehole trajectory design method and system to solve the problems of low accuracy caused by errors in target point prediction and unreasonable initial azimuth design in the existing three-dimensional horizontal well borehole trajectory design

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  • Three-dimensional horizontal well borehole trajectory design method and system
  • Three-dimensional horizontal well borehole trajectory design method and system
  • Three-dimensional horizontal well borehole trajectory design method and system

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Embodiment Construction

[0058] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] Taking a horizontal well in Jinghe Oilfield, Ordos Basin as an example, the design process of the wellbore trajectory of the three-dimensional horizontal well in the heterogeneous reservoir of the present invention will be described below. In this embodiment, a six-segment three-dimensional well is used for illustration. figure 1 As shown, the six-segment 3D well includes a 1D vertical well section, a 2D inclination increasing section, a 3D well section, a 2D stabilizing section, a 2D inclination increasing section and a 2D horizontal section. The single-increment track design is adopted, the third section of the three-dimensional inclination and torsion azimuth well section is designed by the constant tool face method, the fifth two-dimensional inclination section adopts the single-increase track design, and the fourth section of the ...

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Abstract

The invention relates to a three-dimensional horizontal well borehole trajectory design method and system, and belongs to the technical field of oil and gas well drilling. The method includes the steps that according to detection logging resources, sand body distribution is drawn, the reservoir stratum burial depth is predicted, and therefore the vertical depth of a target spot A is determined, and the north-south coordinates and the east-west coordinates of the target spot A are determined according to the proposed borehole size, the drill capacity and the predicted drilling assembly angle building hole rate; the two-dimension and three-dimension combined mode is adopted for a borehole trajectory, on the basis of the tool angle building hole rate and the curvature of a borehole where a sleeve needs to enter, by designing the hole drift angle of the target spot A, the drift azimuth of the target spot A and the section length of a steady inclined section, the initial drift azimuth is determined, and therefore the tool face angle and the borehole curvature are determined, and the profile of the whole borehole trajectory is determined. The method conforms to field construction actuality, is beneficial to oriented construction operation, saves engineering workloads and construction time, and improves the target hitting precision.

Description

technical field [0001] The invention relates to a three-dimensional horizontal well borehole trajectory design method and system, belonging to the technical field of oil and gas drilling. Background technique [0002] In the field of oil and gas technology, with the continuous progress of exploration and development, the degree of production of reserves continues to expand, but the difficulty of producing the remaining reserves is further increasing, especially in heterogeneous reservoirs. Therefore, in order to better improve the production of reserves rate, increase single well production, and more use horizontal wells for production capacity construction. For example, the Daniudi gas field in the Ordos Basin of the North China Branch has built a natural gas production capacity of 1 billion cubic meters through horizontal wells, and achieved good results. The "factory" development model is to drill more than 4 horizontal wells in one well site, see the non-patent literatu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21B43/30
Inventor 闫吉曾
Owner CHINA PETROLEUM & CHEM CORP
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