A Method for Optimizing Borehole Trajectory in Horizontal Well Drilling

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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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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