Geosteering method and device for strata type shale oil and gas horizontal well

The invention provides a strata type shale oil and gas horizontal well geosteering method and device, and relates to the technical field of oil exploration and development. The method comprises the steps that stratigraphic comparison is conducted according to the lithology and electrical characteristics of a target layer, and a comparison marker bed is determined; on the basis of three-dimensional seismic data, a target layer is explained, the structure of a horizontal well area is determined, and a pre-drilling guiding model is established through well-seismic combination; according to the horizontal well area structure and the pre-drilling guiding model, a horizontal section real-time guiding tracking decision is determined; and guiding the horizontal section in combination with the comparison mark layer and the real-time guiding tracking decision of the horizontal section. The real-time guiding tracking decision of the horizontal section is analyzed and determined through multiple methods to guide the hori