A 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: 2017-11-10
CHINA PETROLEUM & CHEM CORP +1
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[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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[0059] The specific embodiments of the present invention will be further described below in conjunction with the drawings.
[0060] In the following, a horizontal well in the Jinghe Oilfield of the Ordos Basin is taken as an example to illustrate the wellbore trajectory design process of a three-dimensional horizontal well in a heterogeneous reservoir of the present invention. In this embodiment, a six-segment three-dimensional well is used for description. figure 1 As shown, the six-segment three-dimensional well includes one-dimensional vertical section, two-dimensional increased deviation section, three-dimensional well section, two-dimensional stable deviation section, two-dimensional increased deviation section and two-dimensional horizontal section. The second section of two-dimensional increased deviation section The single-increasing track design is adopted. The third section of the three-dimensional increase-inclination torsion azimuth section is designed by the constant ...
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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. The present invention draws the sand body distribution and predicts the buried depth of the reservoir according to the logging data, so as to determine the vertical depth of the A target point, and determines the north and south of the A target point through the planned wellbore size, drilling rig capacity and predicted drilling tool assembly deflection rate Coordinates and east-west coordinates; the wellbore trajectory adopts a combination of two-dimensional and three-dimensional methods, based on the tool build-up rate and the borehole curvature required for casing running, through the design of the inclination angle of the A target point, the azimuth angle of the A target point inclination and the stabilization of the inclination The length of the segment is determined to determine the initial well inclination azimuth, thereby determining the tool face angle and the borehole curvature, and then determining the entire wellbore track profile. Target accuracy.
Description
Technical field [0001] The invention relates to a three-dimensional horizontal well borehole track design method and system, and belongs to the technical field of petroleum and natural gas drilling. Background technique [0002] In the field of oil and natural gas technology, with the continuous progress of exploration and development, the degree of production of reserves continues to expand, but the difficulty of producing remaining reserves is further increasing, especially in heterogeneous reservoirs. Therefore, in order to better improve the production of reserves To increase the production rate of a single well, more use horizontal wells for productivity construction. For example, the Daniudi gas field in the Ordos Basin of North China Branch has constructed 1 billion cubic meters of natural gas production capacity through horizontal wells, and achieved good implementation results. In order to protect the environment, reduce engineering costs and effective management in the ...
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IPC IPC(8): G06F17/50E21B43/30
Inventor 闫吉曾
Owner CHINA PETROLEUM & CHEM CORP