Method for adjusting well deviation before horizontal well landing based on marker bed and included angle double constraints

The invention relates to the technical field of shale gas exploration and development, in particular to a method for adjusting well deviation before landing of a horizontal well based on marker bed and included angle double constraints. Acquiring data of the standard well, the drilled horizontal well and the horizontal well to be drilled; establishing a corresponding relation between the standard well and the drilled horizontal well; obtaining a model empirical coefficient by marking a corresponding standard well distance A target point thickness h and an included angle gamma; establishing a marker bed and included angle plate of the standard well by utilizing a regression equation; calculating the well deviation which should be adjusted from the horizontal well to be drilled to the corresponding marker bed; controlling the track of the horizontal well to be drilled before landing according to the calculation result; and controlling the attitude of entering the target A when the horizontal well to be drilled