A Method for Optimizing Borehole Trajectory in Horizontal Well Drilling

A technology of wellbore trajectory and optimization method, which is applied in drilling equipment and methods, directional drilling, drilling equipment, etc., can solve problems such as not being able to well meet the requirements of efficient and economical drilling of shale gas platforms

Active Publication Date: 2020-06-09
PETROCHINA CO LTD
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the prior art method for optimizing the wellbore trajectory of horizontal well drilling only considers engineering technical factors, and cannot well meet the needs of shale gas platform drilling. Requirements for efficient and economical aspects

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  • A Method for Optimizing Borehole Trajectory in Horizontal Well Drilling
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  • A Method for Optimizing Borehole Trajectory in Horizontal Well Drilling

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[0039] In order to make the technical solutions and advantages of the present invention clearer, the following further describes the embodiments of the present invention in detail. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meaning as commonly understood by those skilled in the art.

[0040] The embodiment of the present invention provides a method for optimizing the trajectory of horizontal well drilling. The optimizing method includes the following steps:

[0041] Step S1: Determine n technical and economic indicators related to trajectory optimization of horizontal well drilling, where n is an integer greater than or equal to 2, and the technical and economic indicators include at least one engineering technical indicator and at least one economic indicator.

[0042] Step S2, establishing m types of horizontal well drilling trajectories, where m is an integer greater than or equal to 2.

[0043] Step S3: Obtain the v...

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Abstract

The invention discloses a horizontal well drilling borehole trajectory optimization method and belongs to the technical field of oil and gas development. The optimization method comprises the steps of: determining n technical and economic indicators related to optimization of a wellbore trajectory in a horizontal well, the technical and economic indicators comprising at least one engineering technical indicator and at least one economic indicator; establishing m horizontal well drilling well trajectories; obtaining the values of each technical economic indicator corresponding to each horizontal well drilling well trajectory; normalizing the value of each technical economic indicator corresponding to the drilling trajectory of each horizontal well; determining the weight value of each technical economic indicator; calculating the combined utility values of the wellbore trajectories for each horizontal well separately, wherein the combined utility value is the sum of the value of each technical economic indicator in the wellbore trajectory of each horizontal well, and the sum of the normalized value and the corresponding weight value; determining the optimal horizontal well drillingwell trajectory based on the combined utility value of each horizontal well drilling well trajectory.

Description

Technical field [0001] The invention relates to the technical field of oil and gas development, in particular to a method for optimizing the trajectory of horizontal well drilling. Background technique [0002] With the vigorous development of my country's shale gas industry, shale gas platform drilling has received more and more attention. Shale gas platform drilling refers to the simultaneous drilling of multiple wells in one well site. It has a small area of ​​the well site, low labor and operating costs, high equipment utilization, high operating efficiency, reusable drilling fluid, and multiple wells. Synchronous fracturing is conducive to improving the production capacity and recovery of shale gas. Since shale gas wells are mostly horizontal wells, for shale gas platform drilling, how to optimize the design of the wellbore trajectory of each well is the key to achieving efficient and economical shale gas platform drilling. [0003] In the prior art, the optimization design ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/00G06F30/20E21B7/04
CPCE21B7/046G06F30/20G06Q50/02
Inventor 唐庚周柏年付志胡锡辉阳强
Owner PETROCHINA CO LTD
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