Method for calculating reservoir apparent dip angle by using well trajectory data

Petroleum and natural gas belong to the basic energy field of national countries and livelihood, and petroleum drilling is the most important mode for obtaining petroleum resources. With the technical progress, a directional drilling technology is more and more used in petroleum drilling, and geosteering work is generally needed to improve the reservoir drilling rate of directional drilling. The core of geosteering is to establish a while-drilling geologic model accurately reflecting the thickness, angle and physical property of a reservoir, continuously correct the model along with the drilling progress, and guide drilling until drilling is completed. In a geologic model while drilling, the apparent dip angle of a reservoir in the well trajectory direction is an important parameter, the angle of a drill bit can be adjusted under the condition that the apparent dip angle of the reservoir is known, and the drilling rate is increased. Underground stratums are deposited and distributed in a layered mode, overlyi