Application of geologic interpretation of horizontal well logging data

Abundant geologic information is contained in horizongtal well logging data, how to reveal it is a new job. The horizontal well trajectory generally fluctuates on a formation interface, thus a difference is caused in logging response property, by which the variations of formation structure and lithology can be reflected spatially. Through studying the method for interpretating the key formation interface point and the relations between logging curve property and from trajectory to interface distance, a polynomial trend surface method for describing the spatial distribution of formation interface within the well trajectory is proposed. The method is effective for geologic interprelation of horizontal well logging in Tarim Oilfield with better result, it can be introduced in oilfields.