Optimized design method for positions of horizontal well segmented multi-cluster fracturing perforation clusters
A technology for optimal design and perforation clusters, applied in calculation, earthwork drilling, wellbore/well components, etc.
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[0058] The present invention is described further below:
[0059] This optimal design method for multi-cluster fracturing perforation cluster positions in horizontal wells:
[0060] Step 1. Determine the position of each perforation cluster in the first fracturing stage according to the wellbore characteristics and development requirements.
[0061] Step 2, calculating the induced stress generated by the fracture at the last perforation cluster of the first fracturing stage.
[0062]
[0063] In the formula: are the induced stresses generated by fractures at the last perforation cluster in the first fracturing stage in the direction of the minimum horizontal in-situ stress and the maximum horizontal in-situ stress, MPa; p net is the net pressure of the fracture, MPa; L is the horizontal distance from the center of the fracture to the point, m; c is the half height of the fracture, m; v is the Poisson's ratio of the rock.
[0064] Step 3: Preliminarily select the positio...
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