Horizontal well parameter optimization method and device

Abstract

The embodiment of the invention provides a horizontal well parameter optimization method and device. The method comprises: performing Hough transform on obtained initial horizontal well parameters, and obtaining horizontal well parameters to be processed; disturbing the to-be-processed horizontal well parameters to obtain at least one horizontal well disturbance sub-parameter; calculating an approximate gradient corresponding to the to-be-processed horizontal well parameter based on the horizontal well disturbance sub-parameter and a preset target function; solving updated horizontal well parameters based on the approximate gradient and the to-be-processed horizontal well parameters; and if the difference value between the target function value calculated according to the updated horizontal well parameter and the target function value calculated according to the horizontal well parameter to be processed meets the difference value judgment condition, determining the updated horizontal well parameter as an optimized horizontal well parameter. Through the embodiment of the invention, when the horizontal well parameters are optimized, the interference of the non-Gaussian property of the parameters on the calculation process can be overcome, and the horizontal well parameters can be conveniently and accurately optimized.

Description

technical field [0001] The embodiments of this specification relate to the technical field of geological exploration and development, and in particular to a method and device for optimizing parameters of a horizontal well. Background technique [0002] In the prior art, the effective exploitation method for shale gas reservoirs is generally fracturing horizontal well technology. When designing and arranging horizontal wells, it is often necessary to optimize the design parameters of horizontal wells, such as well position, fracturing stages, fracture spacing, half-length of fractures, and fracture conductivity. For oil reservoirs with simple geological structures, researchers can often obtain better gas reservoir development design schemes directly based on reliable geological information, but for large gas reservoirs with complex address structures, it is generally necessary to use some algorithms to calculate optimization. [0003] At present, optimization methods are ma...

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Problems solved by technology

However, the ensemble optimization method is an optimization method based on Gaussian assumptions. For strong non-Gaussian parameters, the optimization results will be very unreasonable, and in the optimization process of horizontal well parameters, non-Gaussian parameters are inevitable.

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